RX 400h
HYBRID OVERVIEW
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HYBRID OVERVIEW
RX 400h
What’s Inside...
PAGES
Driving the RX400h
Starting, driving, parking attendant instructions, long-term
parking, running out of fuel, and battery facts.
1 - 2
The Benefits of Lexus Hybrid Technology
3 - 4
5 - 7
Impressive Performance; Low Levels of Noise, Vibration, and
Harshness; Reduced Emissions; Improved Fuel Efficiency.
EPA Mileage Estimates & Fuel Economy
Quick Facts - EPA Mileage Estimates, Why you may not
achieve the EPA estimates, Ten Tips for Improving Fuel Economy.
Multi-information Display & Monitors
Multi-information display, Energy Monitor Screen,
8 - 16
Consumption Monitor, Power Gauge and Hybrid Battery Status.
RX400h Hybrid Technology
How the system works, the system’s components and
what they do.
17 - 20
Frequently Asked Questions
21 - 22
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?
?
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A wide range of questions often asked about the RX 400h
and hybrid technology.
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RX400h Hybrid Drive Specifications
Specifications pertaining to Lexus Hybrid Drive.
23
Glossary of Hybrid Technology Terms
Definitions of commonly used hybrid technology terms.
24 - 26
A
Index
27
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HYBRID OVERVIEW
RX 400h
Driving the RX400h
On the whole, driving the RX400h is not very much different from driving a
conventional vehicle. However, there are some subtle differences you will notice.
•
Turning the ignition key "starts" the vehicle, but may not start the engine.
Like starting a regular vehicle, turn the ignition key to the "START" position and
release to start the vehicle. After a few seconds, the "READY" light in the Power
Gauge will come on. Once the "READY" light comes on, place the transmission
gear lever into the desired gear and start driving. When accelerating slowly, the
RX 400h can drive at low speeds on electric power alone, so the gasoline engine
may not start for awhile dependng upon the need.
The transmission will feel different.
•
The RX400h uses an Electronically-controlled Continuously Variable
Transmission (ECVT). The transmission does not shift with fixed gear ratios like a
conventional transmission, so it delivers power efficiently and smoothly.
The “B” gear position is for engine braking.
The brakes may feel different.
•
•
The RX 400h has a regenerative braking system which works in conjunction
with its conventional hydraulic braking system. As a result, the brakes may feel
different from a conventional vehicle.
The engine will turn off and on while you drive.
The engine will automatically turn on and off as needed. At medium or high speeds,
it is normal for the engine to be on most of the time. At low speeds or when
stopped, the engine may or may not be on, depending on the need.
You will notice different sounds while driving.
•
The engine sound will be more steady than a conventional vehicle when accele-
rating due to the smooth operation of the ECVT. It is also normal for the new tech-
nology of the Lexus Hybrid Drivesystem to make a "whirring" sound while driving.
CAUTION: While driving a hybrid vehicle, pay special attention to the area around
the vehicle. Because there is little vehicle noise in electric-only mode, pedestrians, people
riding bicycles or other people and vehicles in the area may not be aware of the vehicle
starting off or approaching them, so take extra care while driving.
(continued next page)
1
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HYBRID OVERVIEW
RX 400h
Driving the RX 400h (continued)
•
Some parking attendants may not be familiar with the RX 400h.
To properly operate the vehicle, these basic tips are important:
1. Turn key to “START” and release.
2. Begin driving when “READY” light stays on.
3. The engine will start and stop automatically.
New RX 400h vehicles come with parking attendant key ring tabs, with these tips
in English and Spanish.
When refueling, the fuel door may take a few moments to open.
As part of emissions system operation, it may take up to 15 seconds for the fuel
door to automatically release after the release button is pressed. The Multi-
information Display in the instrument cluster will display "Refuel Ready" when the
door releases.
•
•
Running out of fuel.
Do not run your RX 400h out of fuel. The RX 400h is not designed to be
operated with the fuel tank empty. If you try to start the RX 400h with the fuel tank
empty, the hybrid system will become disabled on the third attempt. If you continue
to drive with the fuel tank empty, the hybrid battery will rapidly discharge and the
hybrid system will shut down. If you run out of fuel, immediately pull over to a safe
location and turn off the vehicle. Be sure to add fuel before attempting to restart
the vehicle or continuing to drive.
Hybrid Battery cooling vents.
Do not block the hybrid battery cooling vents located
under the rear seats with cargo or other items. Doing
so could cause overheating of the hybrid battery.
Maintaining charge for your 12-volt battery
•
•
Thefollowingwillhelpkeepyourvehicle’s12-voltbatteryfullycharged:Drivevehicleat
least weekly. Operate accessories with vehicle in “READY” mode. When parking,
make sure all doors are closed and lights are turned off.
Long-term parking.
If the vehicle has been parked for two weeks or longer, do not operate the power rear
door until you have turned the key to “START” and the “READY” light stays on. If the
vehicle has been parked for a long time, the 12-volt and the hybrid battery will
discharge gradually. For parking longer than about 30 days, charging of the 12-volt
battery may be required. See your dealership for details. To keep the hybrid battery in
good condition, drive the vehicle at least once every several months for at least 30
minutes or ten miles. If the hybrid battery becomes fully discharged and the vehicle will
not start, even with a jump start to the 12-volt battery, contact your Lexus dealership.
2
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HYBRID OVERVIEW
RX 400h
The Benefits of Lexus
Hybrid Technology
Impressive Performance
• Lexus hybrid vehicles deliver impressive throttle response, even from a standing
start. This is because the electric motors deliver maximum torque instantly.
• The Lexus Hybrid Drive system combined with the ECVT (Electronically
controlled Continuously Variable Transmission) helps deliver smooth, seamless
acceleration for excellent passing performance and drivability.
Low Levels of Noise, Vibration and Harshness (NVH)
• Since Lexus hybrid vehicles can operate on electric power only during start-up
and lower speeds, the NVH level is about half that of conventional gasoline-
powered vehicles.
• The gasoline engine does not have to be turned on in order for the electric
air conditioner in Lexus hybrid vehicles to operate.
• The Electric Power Steering (EPS) system eliminates the hydraulic pump
associated with steering noise and vibration.
• The ECVT eliminates the hesitation and noise level associated with shifting
between fixed gear ratios.
• The acoustic windshield is laminated with a low-durometer triple-layer film that
helps absorb engine, wind and road noise.
3
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HYBRID OVERVIEW
RX 400h
The Benefits of Lexus Hybrid Technology (continued)
Reduced Emissions
• Lexus hybrid vehicles produce 70% fewer smog-forming emissions than the
average new vehicle and are certified as an SULEV (Super Ultra-Low Emission
Vehicle) by the California Air Resources Board.
• The gasoline engine is turned off much of the time during idle and acceleration,
which means that zero emissions are being produced.
• The gasoline engine can be smaller in size than non-hybrid vehicles, producing
fewer emissions without sacrificing performance.
Improved Fuel Efficiency
• By combining a hybrid battery, electric motors and engine, the Lexus Hybrid
Drive system is able to reduce fuel consumption, while still delivering ample
power for all types of driving situations.
• The RX 400h delivers an improved city gas mileage rating.*
• Fuel consumption is zero when the engine is turned off and the vehicle is
operating in electric only mode.
* Actual mileage may vary.
4
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HYBRID OVERVIEW
RX 400h
EPA Mileage Estimates
& Fuel Economy
Quick Facts - EPA Mileage Estimates
The EPA estimated fuel economy numbers are derived from vehicle testing
conducted at the U.S. Environmental Protection Agency’s (EPA’s) National Vehicle
and Fuel Emissions Laboratory in Ann Arbor, Michigan. Vehicle
manufacturers also submit test results based on strict EPA standardized drive pat-
terns. Each year, the EPA provides the data to the Department of Energy, which
Some quick facts about EPA estimated fuel economy tests:
Federal law requires EPA estimated fuel economy to be provided on a fuel
economy label affixed to the window of every vehicle (see Figure 1). The EPA
estimates serve as a useful guide for comparing the relative fuel efficiency of
various vehicles and are intended for comparison only. Fuel economy estimates
are determined under ideal laboratory conditions following a standardized test
determined by federal law. Each vehicle must complete tests simulating a driving
routine for:
• City - Low speeds in stop-and-go urban traffic.
• Highway - Free-flow traffic at highway speeds.
• High Speed - Higher speeds; harder acceleration and braking.
• AC - Air conditioner use under hot ambient conditions.
5
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HYBRID OVERVIEW
RX 400h
EPA Mileage Estimates & Fuel Economy (continued)
Typical EPA Mileage Estimate data found on vehicle window sticker
(Sticker and figures for AWD model) - Figure 1.
Expected range
for most drivers
22 to 30 MPG
Expected range
for most drivers
20 to 28 MPG
Your actual
mileage will vary
depending on how you
drive and maintain
your vehicle.
Why you may not achieve the EPA estimates
Because the EPA fuel economy estimates are derived in ideal laboratory
conditions, they are just estimates, which may not reflect real world conditions.
There are many factors which may cause your actual mileage with the
RX 400h, or other vehicles, to vary from the EPA estimates:
• Quick acceleration and heavy braking may reduce mileage by as much as
33% in highway driving and as much as 5% in city driving.
• Driving at highway speeds above 60 mph. (The maximum EPA highway test
speed is 60 mph, the average speed is 48 mph)
• Driving on hilly or mountainous terrain and unpaved roads. (EPA tests
assume flat roads.)
• Short trips cause the engine to run more as a percentage of driving,
as it warms the emissions system.
• Carrying extra weight or towing a trailer. (The EPA test assumes only
300 lbs. of passengers and cargo.)
• Cargo racks. (Vehicles are tested without cargo racks, which can increase
wind drag.)
• Poor maintenance. (Vehicles tested are in top condition.)
• New vehicles. (Optimum fuel economy may not be realized until the
engine is "broken-in," which may take up to 5,000 miles.)
• Some fuels contain less energy than others. Using oxygenated fuels or
reformulated gasoline (RFG), for example, can cause a small decrease
in fuel economy.
(Source for above information: www.fueleconomy.gov)
6
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HYBRID OVERVIEW
RX 400h
EPA Mileage Estimates & Fuel Economy (continued)
Ten tips for improving fuel economy
The following tips can help you achieve the best possible fuel economy:
1) Plan ahead to combine short trips in order to minimize cold starts.
2) Accelerate slowly.
3) Avoid heavy braking. Monitor traffic to minimize braking and coast
whenever possible.
4) Avoid speeds in excess of 60 mph; fuel economy suffers at speeds higher
than 60 mph and drops significantly above 70 mph.
5) In stop-and-go traffic, accelerate to the desired level then lift off the
accelerator pedal allowing the vehicle to run more on electric power.
6) Check tire pressure and maintain it at the recommended pressure.
7) Avoid carrying unnecessary loads; extra weight reduces fuel economy.
8) Use the air conditioner and defroster only as needed.
9) Use premium fuel to improve fuel economy and performance.
10) Use the "D" gear position rather than the "B" position. During normal
driving conditions, always drive in "D" for best fuel economy. Only use
"B" gear position if needed to help maintain vehicle speed when going
down steep grades.
7
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HYBRID OVERVIEW
RX 400h
Multi-information
Display & Monitors
All RX400hs are equipped with a
Multi-information Display that shows
a simplified representation of the
approximate flow of energy within the
hybrid system. The display does not show
all of the components of the system.
To show the Energy Monitor display, press the “DISP.”
button located on the steering wheel, until you reach the
Energy Monitor display. It may be necessary to press the
button more than once to reach this display.
The vehicle is being primarily driven by the engine.
• The arrow points away from the engine and then to the wheel.
The level of hybrid battery charge, circled in red, will be shown
by the amount of white within the battery image.
The vehicle is being driven by the hybrid battery.
• The arrow points away from the hybrid battery and
then to the wheel.
The vehicle is being driven by both the engine and
the hybrid battery.
• The arrows point away from the hybrid battery and the
engine and then to the wheel.
The vehicle is coasting or slowing down, regenerating
electricity and charging the hybrid battery.
• The arrow points away from the wheel and then to the
hybrid battery.
The vehicle is stopped and the hybrid battery is not
being charged.
• No arrows are displayed.
8
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
The Energy Monitor Screen (Vehicles with optional Navigation Systems only.)
The optional Energy Monitor shows a simplified representation of the approximate flow
of energy within the hybrid system. The display does not show all of the
components of the system. The display is part of the RX 400h Navigation System and
is located at the center console display.
The Energy Monitor display changes as the RX 400h transitions through different
driving conditions. The Energy Monitor display will show the changes in energy and
power flow through the system at a given time as the vehicle is driven.
To access the Energy Monitor screen,
press the “INFO” button located on the lower
edge of the navigation display. On the touch
screen that appears, touch the “TRIP INFO”
button.
Energy Monitor Screen description
Hybrid battery status.
Outside temperature.
Energy flow
Orange =
Mechanical
drive power
Green =
Electrical/
regenerative
power
*
Yellow =
Electrical
drivepower
Press to go to the
Current fuel economy
Consumption Monitor.
in miles per gallon (MPG).
• “FRONT ELECTRIC MOTOR” represents Electric Motor/Generator (MG1) and Front Electric
Motor/Generator (MG2) together.
• “REAR ELECTRIC MOTOR” represents Rear Electric Motor/Generator (MGR).*
• “BATTERY” represents the hybrid battery.
* Vehicles with optional All-Wheel Drive only.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
Typical Energy Monitor Screens (Vehicles with optional Navigation Systems only.)
*
The vehicle is stopped, the engine is off, and the hybrid battery is not
being charged.
• No arrows are displayed.
*
The vehicle is being driven by the front electric motor.
• The arrows point away from the hybrid battery to the front electric motor and then
to the front wheels.
* Vehicles with optional All-Wheel Drive only.
(continued on next page)
10
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
Typical Energy Monitor Screens (continued)
(Vehicles with optional Navigation Systems only.)
*
The vehicle is being driven by the engine and the front
electric motor.
• The arrows point away from the hybrid battery, the engine, and the front
electric motor and then to the front wheels.
*
The vehicle is being driven by the front and rear* electric motors.
• The arrows point away from the hybrid battery and the front and rear* electric
motors and then to the front and rear wheels.*
* Vehicles with optional All-Wheel Drive only.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
Typical Energy Monitor Screens (continued)
(Vehicles with optional Navigation Systems only.)
*
The vehicle is being driven by the engine and the front and rear*
electric motors.
• The arrows point away from the hybrid battery, the engine, and both front
and rear* electric motors, and then to the front and rear wheels*.
*
The vehicle is coasting or slowing down, regenerating electricity and
charging the hybrid battery.
• The arrows point away from the wheels and electric motors and then to the battery.
* Vehicles with optional All-Wheel Drive only.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
Typical Energy Monitor Screens (continued)
(Vehicles with optional Navigation Systems only.)
*
The vehicle is parked and the engine is charging the hybrid battery.
• The arrows point from the engine to the front electric motor, then to the hybrid battery.
Hybrid Battery Status information
Hybrid Battery full.
*
Hybrid Battery low.
Battery status indicator showing six blue bars, indicating
battery is at medium charge level.
The approximate amount of electric charge available in the hybrid battery is
displayed in one of 8 different levels. Unlike the vehicle fuel gauge, it is normal for
the battery status indicator to actively move up and down and change color,
depending on driving conditions. The top green bar may not appear except after
driving down long mountain grades.
* Vehicles with optional All-Wheel Drive only.
13
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (Continued)
The Consumption Monitor (Vehicles with optional Navigation Systems only.)
To access the Consumption Monitor
screen, press the “INFO” button located on
the lower edge of the navigation display.
On the touch screen that appears, touch the
“TRIP INFO” button.
The Consumption Monitor description
Outside temperature
Average fuel
economy in
MPG
Press to clear the average
fuel economy and distance
travelled
Press to go to
the Energy
Monitor screen
Distance
travelled
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
The Consumption Monitor (continued)
(Vehicles with optional Navigation Systems only.)
2
3
E
A partial “E”
box equals
less than
50 Wh (Watt
hours) of
electricity.
Yellow bars
represent
average
fuel economy
(MPG)
E
Each “E” box
equals
50 Wh
(Watt hours)
of electricity.
for 5-minute
intervals.
1
Current fuel economy (MPG).
The Consumption Monitor displays three charts combined into one:
1
The yellow bar display on the far right represents fuel economy from
moment to moment.
2
The yellow bars represent the average fuel economy in miles per gallon
(MPG). The higher the bars reach, the better fuel economy the vehicle is
getting. Each bar represents a 5 minute period. The bars shift to the left every
5 minutes, so the bar between 0 and 5 min. is the most recent 5 minute
period. This information will clear when you turn off the vehicle.
The small boxes with “E” in the center represent the amount of electricity
that has been regenerated in 50 Wh (Watt hour units). A partial box means
less than 50Wh. Each column represents a 5 minute period. The columns
shift to the left every 5 minutes, so the column between “0 and 5” is the most
recent 5 minute period. The more boxes there are, the more
3
regenerative energy is produced and stored in the hybrid battery.
This information will clear when you turn off the vehicle.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Multi-information Displays & Monitors (continued)
The Power Gauge
The Power Gauge indicates the approximate power in kilowatts the hybrid
system delivers or receives. The needle will move up towards 200kW during
acceleration and downward into the blue area when the hybrid system is
regenerating power during coasting and braking conditions.
16
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HYBRID OVERVIEW
RX 400h
RX400h
Hybrid Technology
Lexus Hybrid Drivebasics.
A hybrid vehicle is a vehicle that combines power from different
sources to efficiently operate. Lexus has spent many years and
logged millions of test miles developing and testing the hybrid
technology found in the RX 400h.
•
•
•
The Lexus Hybrid Drive system that powers your Lexus RX 400h is
an advanced system that incorporates the advantages of both
electric motors and gasoline engines.
The RX 400h can be driven on hybrid battery power alone, for
short distances at lower speeds, then the engine will start when
power is needed to recharge the 12-volt and hybrid batteries, or
when driving conditions call for more power.
•
Lexus Hybrid Drive automatically controls energy usage in the
most efficient way possible. The system even captures energy when
the vehicle is slowing down.
This chapter explains some of the components that make up the Lexus
Hybrid DriveSystem and their functions.
17
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HYBRID OVERVIEW
RX 400h
RX 400h Hybrid Technology (continued)
Lexus Hybrid Drive main components
*
*
4
8
6
7
10
1
2
3
9
5
8
3.3 L 24-V DOHC V-6 Engine with VVT-i – The primary power source for
your vehicle, the engine works in conjunction with the hybrid battery to
deliver power to the ECVT.
1
2
3
Electric Motor / Generator (MG1 ) – Serves as the starter motor for the
engine and a “pathway” for the engine’s power to reach the front wheels.
Front Electric Motor / Generator (MG2) – Delivers power to the front
wheels. It can run alone or with the engine. It is driven by electrical power
from MG1 and/or the hybrid battery. During braking or deceleration, it
generates electricity to recharge the hybrid battery.
Rear Electric Motor* / Generator (MGR)* – Operates when starting from
a stop, during hard acceleration, sharp turning, and if the front wheels slip. It
is driven by electrical power from the hybrid battery and MG1 as needed.
During braking or deceleration, it generates electricity to recharge the
hybrid battery. The All-Wheel Driveu system operates
4
automatically as needed.
(continued on next page)
* Vehicles with optional All-Wheel Drive only.
u The RX400h is not designed to be driven off-road.
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HYBRID OVERVIEW
RX 400h
RX 400h Hybrid Technology (continued)
Lexus Hybrid Drive main components (continued)
Hybrid Battery – Composed of sealed nickel-metal hydride modules, the
288-volt hybrid battery is located under the rear seat. It supplies power to
the electric motors during start-up, acceleration, uphill driving, and
reverse. It supplies power to the Inverter for use by the electric motors
and stores regenerative energy captured during coasting and braking
conditions.
5
Inverter – Converts the hybrid battery’s high voltage DC current into
AC current for the electric motors and vice versa, depending on driving
demands and electrical system needs. The inverter can also boost the hybrid
battery’s power up to 650 volts as needed.
6
Hybrid Electronic Control System – Monitors and controls the power flow
operation of MG1, MG2, MGR*, and the inverter.
7
8
Regenerative Braking System – Helps recover energy used to slow the
vehicle during braking or coasting. During braking or coasting, MG2 and
MGR* turn into generators, which create electricity to help charge the
hybrid battery. As they create electricity, they create drag, which helps slow
the vehicle. The conventional brake system and the regenerative brake sys-
tem work in conjunction with each other.
Electronically-controlled Continuously Variable Transmission (ECVT) –
Delivers smooth acceleration without conventional gear shifting, while
enhancing efficiency. It has fewer parts than a conventional automatic trans-
mission. MG1 and MG2 are part of the ECVT. During sustained highway
cruising, the ECVT helps maximize fuel economy for the engine.
9
10 12-volt Battery – Enables the Hybrid Electronic Control System to "start" the
hybrid system (vehicle “READY” mode) and operates the basic
electrical system. This battery is charged by the DC/DC converter, which is
part of the inverter assembly.
* Vehicles with optional All-Wheel Drive only.
19
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HYBRID OVERVIEW
RX 400h
RX 400h Hybrid Technology (continued)
How Lexus Hybrid Drive works.
Lexus Hybrid Drive incorporates gas-engine power with electric motor
efficiency in a seamless manner.
Typically, the system works as follows:
Starting from a stop
The front electric motor/generator (MG2) and the rear electric motor/generator
(MGR*) both drive the vehicle. The engine is not required to start moving the
vehicle, but may come on to charge the hybrid battery or make heat available for
the climate control and emissions systems.
Normal acceleration
MG2 and the engine drive the vehicle. MGR* is not powered. The engine drives
MG1 as a generator to power MG2 and charge the hybrid battery as needed.
Full acceleration
The engine, MG2, and MGR* work together to drive the vehicle. The hybrid
battery supplies additional power to MG2 and MGR.
Cruising (constant speed)
Primarily, the engine will drive the vehicle. The engine, MG1, MG2, and MGR* will
come on as needed depending on road conditions and other factors. MG2 and
MGR* may act as motors or as generators depending on the need to make power
or regenerate electricity to recharge the hybrid battery.
Coasting and braking
As part of the regenerative braking system, MG2 and MGR* act as generators to
regenerate electricity to charge the hybrid battery. The engine may turn off before
the vehicle comes to a complete stop.
Backing-up
MG2 and MGR* reverse direction to drive the vehicle. The engine is typically off,
unless it is needed to recharge the hybrid battery or warm-up the engine.
* Vehicles with optional All-Wheel Drive only.
20
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HYBRID OVERVIEW
RX 400h
Frequently Asked
Questions
Q: How should I choose between an RX 350 and an RX 400h hybrid?
A: If most of your driving is highway cruising or you leave your vehicle parked for
several weeks at a time, the RX 350 may best meet your needs. If most of
your driving is stop-and-go city and you want improved acceleration and fuel
economy, the RX 400h may best meet your needs.
Q: What changes to the interior of the RX 350 were required to
accommodate the hybrid system of the RX 400h?
A: The rear seat is raised slightly (about one inch) and the tool storage
compartment is shallower to make room for hybrid system components.
The rear cargo area is the same size.
Q: What is the warranty on the RX 400h? What is the warranty on the
hybrid battery?
A: In addition to the Basic Warranty of 48-month/50,000 miles and the
powertrain and restraint system coverage of 72 months/70,000 miles,
there is a hybrid warranty. The Hybrid Vehicle System Warranty is 96 months
(8 years)/100,000 miles from the vehicle’s in-service date, whichever occurs
first. It is applicable to certain components of the hybrid electronic control
system and the hybrid battery. See the Owner's Manual and other owner
information materials in the vehicle for details.
Q: Does the RX 400h qualify for the single-occupant vehicle in the high
occupancy vehicle (HOV) lane?
A: We do not expect the RX 400h to qualify for the HOV lane.
Check with your state department of motor vehicles for more information.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Frequently Asked Questions (continued)
Q: Do you have to charge it/plug it in?
A: Lexus Hybrid Drive automatically recharges the 12-volt and hybrid
batteries using regenerative braking or by running the engine to generate
electricity. However, if the vehicle has been parked for a long time, the 12-volt
and the hybrid battery will discharge gradually. For parking longer than about
30 days, charging of the 12-volt battery may be required. See your dealership
for details. To keep the hybrid battery in good condition, drive the vehicle at least
once every several months for at least 30 minutes or ten miles. If the hybrid
battery becomes fully discharged and the vehicle will not start, even with a jump
start to the 12-volt battery, contact your Lexus dealership.
Q: What maintenance is required?
A: The maintenance requirements are comparable to what a gasoline-powered
RX350 requires. The hybrid battery and motor/generators do not require
ongoing maintenance. However, to keep the hybrid battery in good condition
drive the vehicle at least once every several months for at least 30 minutes.
Lexus recommends having RX 400h maintenance and repairs performed by
an authorized Lexus dealership. To locate your nearest authorized Lexus
Maintenance and repairs not performed by an authorized Lexus dealership
should be performed by a qualified technician following procedures in Lexus
service and repair publications.
Q: What safety standards does the RX400h comply with?
A: Lexus engineers have spent enormous effort to ensure this vehicle meets or
exceeds all of the U.S. government’s stringent safety standards, as do
all Lexus vehicles. See the Owner's Manual and other owner information
materials in the vehicle for important Safety Precautions.
22
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HYBRID OVERVIEW
RX 400h
RX400h Hybrid
Drive Specifications
Hybrid System
Engine Type
60° V6, aluminum block and heads, certified
Super Ultra-Low Emissions Vehicle (SULEV)
Displacement
Valvetrain
3.3 liters (202 cubic inches)
Four cam, four valves per cylinder, with continuously Variable
Valve Timing with intelligence (VVT-i)
Electric-Drive Motors
2 Front and 1 rear* high output, permanent magnet,
electric motor/generators
Sealed, Nickel-Metal Hydride (NiMH) modules, 288-volt
268 hp @ 5,600 rpm (combined engine and hybrid battery)
Hybrid Battery
Total System Horsepower
Body, dimensions
Front-wheel drive 4,190 lb., All-wheel driveu 4,365 lb.
17.2 gallons
Curb Weight
Fuel Tank Capacity
Performance
0-60 acceleration 1
Front-wheel drive 7.5 seconds3, All-wheel driveu 7.3 seconds3
112 mph1 (electronically-limited)
Top Track Speed 1
Fuel Consumption 2
Front-wheel drive: 27/24 mpg (city/highway, estimated)
All-wheel drive: 26/24 mpg (city/highway, estimated)
Drivetrain
u
Front-wheel drive or optional part-time All-wheel drive (AWD)
Type
(ECVT) Electronically-controlled Continuously Variable
Transmission
Transmission
Chassis
Four-wheel electronic power-assisted discs, with four-
sensor, four-channel Anti-lock Braking system (ABS),
Brake Assist and integrated regenerative brake system.
Brakes
1 These performance capacity figures are for comparison only, and were obtained with prototype vehicles by
professional drivers using special safety equipment and procedures. These should not be attempted on public
streets or highways.
2 EPA estimated ratings. Actual mileage may vary.
Source: Manufacturer’s estimate
* Vehicles with optional All-Wheel Drive only.
3
u
The RX400h is not designed to be driven off-road.
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HYBRID OVERVIEW
RX 400h
Glossary of Hybrid
Technology Terms
12-volt Battery
The low-voltage battery that provides electrical
power to accessories and the vehicle's computer,
similar to the battery of a conventional vehicle.
AC
Electrical current that reverses its flow in a circuit at regular intervals.
The RX400h's electric motors operate on AC current.
DC
Electrical current that flows continuously in one direction. The RX400h's hybrid
battery and 12-volt battery provide DC current.
Electronically-controlled Continuously Variable
Transmission (ECVT)
A type of transmission with an infinite number of gear
ratios that change depending on vehicle
speed and engine rpm. As a result, the engine and the
motors operate at their most efficient points regardless
of the vehicle's speed. The ECVT in the RX 400h
provides seamless acceleration without the shift points felt with conventional trans-
missions. The front electric motor/generators and the planetary gear set are part
of the ECVT, which has fewer parts than a conventional automatic transmission.
Engine
In a hybrid vehicle, the word "engine" refers to the
gasoline engine, not an electric motor.
The gasoline-powered 3.3L V-6 is the primary
power source for the RX400h.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Glossary of Hybrid Technology Terms (continued)
Hybrid Battery
Composed of sealed Nickel-Metal Hydride (NiMH)
modules, the 288-volt hybrid battery provides electric
motor power during start-up, acceleration, uphill driving,
and reverse. It also stores energy captured during
regenerative braking. The hybrid battery is covered for 8 years/100,000 miles
which ever occurs first. In normal use, we expect the battery to last longer than the
length of this warranty.
Inverter
The inverter converts the hybrid battery's high voltage
DC current into AC current for the electric motors and
vice versa, depending on driving demands and the
needs of the electrical system. The inverter can also boost
the battery's power up to 650 volts as needed for maximum power.
kW (Kilowatts)
A unit of electrical power equal to 1000 watts or 1.34 horsepower.
Lexus Hybrid Drive
Lexus hybrid technology that combines an advanced
gasoline engine, electric motor/generators, a hybrid
battery, an Electronically-controlled Continuously
Variable Transmission (ECVT) and advanced electronic
controls to provide powerful, seamless acceleration, outstanding fuel economy, and
reduced emissions.
Motor/Generator
In a hybrid vehicle, the word "motor" refers to an
electric motor which works with the vehicle's engine
to efficiently drive the vehicle.
The RX400h uses permanent magnet AC motors:
a motor/generator (MG1), a front motor/generator (MG2), and a rear motor/
generator (MGR*).
* Vehicles with optional All-Wheel Drive only.
(continued on next page)
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HYBRID OVERVIEW
RX 400h
Glossary of Hybrid Technology Terms (continued)
Planetary gear set
The component of the ECVT that delivers the efficient
mix of engine and hybrid power to the front wheels.
The operation of the planetary gear set provides
seamless acceleration without shift points.
Regenerative Braking
Regenerative braking is a feature that allows an
electric motor to act as a generator when braking.
It converts the kinetic energy of the car's motion into
electrical energy. Whenever the RX400h is braking or
slowing, the electrical energy made during regenerative braking is used to recharge
the hybrid battery and is measured in Watt Hours (Wh) on the
Consumption Monitor screen (vehicles with optional Navigation Systems only).
Volt
The unit of measure for voltage. Voltage is the electrical pressure which causes
current to flow in an electrical circuit.
Watt
A unit of electrical power. One watt equals 1/746th horsepower.
Wh (Watt hours)
Electrical power used, or in the case of the RX 400h,
regenerated and measured in terms of time.
E
* Vehicles with optional All-Wheel Drive only.
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HYBRID OVERVIEW
RX 400h
Index
Lexus Hybrid Drive – 1, 17-20, 25
12-volt battery – 2, 19, 22, 24
Acceleration – 3, 5-6, 16, 18-21, 23-26
AWD (All-Wheel Drive) – 6, 9, 18, 23
"B" gear position – 1, 7
Backing-up – 20
Battery, maintaining charge - 4
Brakes – 1, 23
Long-term parking – 2
Maintenance – 6, 22
MG1 – 9, 18-20, 25
MG2 – 9, 18-20, 25
MGR2 – 9, 18-20, 25
MPG (Miles Per Gallon) – 4, 6, 9, 14-15, 23
Multi-information display1 – 8
NVH (Noise, Vibration, and Harshness) - 3
Owner’s Manual – 21-22
Parking – 2
Braking – 7, 16, 18-20, 22-23, 25-26
Charging – 2, 8, 12-13, 22
Coasting – 8, 12, 16, 19-20
Consumption Monitor1 – 9, 14-15, 26
Cruising – 19-21
Parking attendants – 2
"DISP" button1 – 8
Displacement – 23
Dimensions – 23
Performance – 3-4, 7, 23
Planetary gear set – 24, 26
Power gauge – 1, 16
"READY" Light – 1-2, 19
Rear electric motor/generator
(MGR)2 – 9, 11, 12, 18-20, 23, 25
Refueling – 2
Regenerative braking – 8, 12, 15-16, 18
Running out of fuel – 2
Drivetrain – 23
"E" box1 – 15
ECVT (Electronically-controlled
Continuously Variable Transmission) -
1, 3, 19, 23-24, 25-26
Electric motor/generator – 9, 20, 23-25
Energy Monitor1– 8-14
Safety standards – 22
Specifications – 23
Starting – 1, 18, 20
Engine – 1-3, 6, 8, 10-13, 17-20, 22-26
Emissions - 4
SULEV (Super Ultra Low Emissions Vehicle) - 4, 23
Tax credit – 21
Transmission – 1, 19, 23-25
"TRIP INFO" button1 – 9, 14
Valvetrain – 23
EPA Mileage Estimates – 5-7
Front electric motor/generator (MG2) –
9-12, 18-20, 24-25
Fuel Door – 2
Fuel Tank – 2, 23
VVT-i (Variable Valve Timing with
intelligence) – 23
Horsepower (hp) – 23, 25-26
HOV lane – 22
Warranty – 21, 25
Watt hours (Wh) – 15, 26
Hybrid battery – 2-4, 8-13, 15, 17-26
Hybrid battery status – 9, 13
Hybrid electronic control system – 19, 21
Hybrid technology – 17-20, 22, 24-26
INFO button1 – 9, 14
1 Vehicles with optional Navigation Systems only.
2 Vehicles with optional All-wheel drive only.
Inverter – 19, 25
Specifications, features, equipment, technical data, performance figures, options, and color and trim are based upon informa-
tion available at time of printing, are subject to change without notice, are for mainland USA vehicles and may
differ in Hawaii, Puerto Rico, the US Virgin Islands and in other regions. Some vehicles may be shown with optional
equipment. Optional equipment listed may not be available separately or in all regions. Technical photos and illustrations are
from Lexus Technical Training and other photos are from CJE Automotive Marketing under contract with Lexus Product
Coordination.
27
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THE PURSUIT OF PERFECTION.
M/N 00242-RXHYB-08
Printed in USA (1/08) © 2008 Lexus
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