Nissan Leaf. Manual — part 174
SYSTEM
BR-17
< SYSTEM DESCRIPTION >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
C1A65
The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
• Cooperative regenerative brake control
• Power supply from the brake power supply backup unit
C1A67
Normal control
C1A69
The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
• Cooperative regenerative brake control
• Power supply from the brake power supply backup unit
C1A6B
The following function is suspended.
• Backup power supply from the brake power supply backup unit
C1A6C
C1A6D
C1A6E
The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function
C1A6F
The following function is suspended.
• hill start assist function
C1A70
The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function
C1A74
C1A80
The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
• Cooperative regenerative brake control
• Power supply from the brake power supply backup unit
C1A81
C1A82
C1A83
C1A84
C1A85
C1A86
C1A87
C1A88
C1A89
C1A8A
C1A8B
C1A90
C1A91
The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function
C1A98
The following function is suspended.
• Power supply from the brake power supply backup unit
C1A99
C1A9A
C1AA0
The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
• Cooperative regenerative brake control
• Power supply from the brake power supply backup unit
C1AA1
C1AA2
C1AA3
C1AA9
The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function
C1AB8
C1AB9
The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
• Cooperative regenerative brake control
• Power supply from the brake power supply backup unit
C1ABA
DTC
Vehicle condition
BR-18
< SYSTEM DESCRIPTION >
SYSTEM
COOPERATIVE REGENERATIVE BRAKE FUNCTION
COOPERATIVE REGENERATIVE BRAKE FUNCTION : System Description
INFOID:0000000010122988
COOPERATIVE REGENERATIVE BRAKE CONTROL
• A regenerative brake drives the traction motor to act as an alternator, and converts the kinetic energy pro-
duced by rotation of the tires into electrical energy. The converted electrical energy charges the Li-ion bat-
tery.
• When the brakes are operated (during driving), the electrically-driven intelligent brake unit calculates the
required braking force based on the input value from the stroke sensor (indicating the amount of brake pedal
operation), and it sends the result to the VCM. At the same time, it calculates the hydraulic braking force
needed to produce the required braking force.
• The VCM calculates the regenerative braking force needed to produce the required braking force, and sends
the result to the electrically-driven intelligent brake unit. At the same time, the traction motor inverter uses
the traction motor to perform regenerative braking.
• The electrically-driven intelligent brake unit calculates the hydraulic braking force again based on the regen-
erative braking force result from the VCM and the calculated result for hydraulic braking force.
C1AC0
The following function is suspended.
• Cooperative regenerative brake control
C1AC1
The following functions are suspended.
• Boost operation by the electrically-driven intelligent brake
C1AC8
Normal control
C1AD0
U1000
The following function is suspended.
• Cooperative regenerative brake control
• hill start assist function
U1010
U1510
U1511
The following functions are suspended.
• Power supply from the brake power supply backup unit
DTC
Vehicle condition
JSFIA1832GB
SYSTEM
BR-19
< SYSTEM DESCRIPTION >
C
D
E
G
H
I
J
K
L
M
A
B
BR
N
O
P
• Based on the calculated result for hydraulic braking force, the electrically-driven intelligent brake unit uses
the motor inside the electrically-driven intelligent brake unit to move the master cylinder piston, adjusting the
fluid pressure inside the master cylinder to the master fluid pressure. It also performs adjustment so that the
fluid pressure that is actually applied matches the target fluid pressure.
NOTE:
The fluid pressure applied to the master cylinder is detected by master cylinder pressure sensor and trans-
mits the electrically-driven intelligent brake unit from ABS actuator and electric unit (control unit) via brake
communication (CAN communication).
• The fluid pressure generated by the master cylinder is sent to each brake caliper via the ABS actuator and
electric unit (control unit).
• When the cooperative regenerative brake is operating, the motor inside the electrically-driven intelligent
brake unit moves the master cylinder piston according to the amount of regeneration.
• Moving the master cylinder piston increases the fluid pressure applied to the ABS actuator and electric unit
(control unit). (The brake pedal stroke does not change.)
• When brake control is stopped (immediately before vehicle stop or while vehicle is stopped), cooperative
regenerative brake control is not performed.
SYSTEM DIAGRAM
INPUT SIGNAL AND OUTPUT SIGNAL
Major signal transmission between each unit via communication lines is shown in the following table.
JSFIA2283GB
BR-20
< SYSTEM DESCRIPTION >
SYSTEM
OPERATION
During Normal Braking
Component
Signal description
ABS actuator and electric unit (control unit)
Mainly transmits the following signals to electrically-driven intelligent brake unit via CAN
communication and brake communication (CAN communication).
• ABS actuator and electric unit (control unit) control signal
• Vehicle speed signal (ABS)
• Decel G signal
• Front LH wheel speed signal
• Rear LH wheel speed signal
• Front RH wheel speed signal
• Rear RH wheel speed signal
• Yaw rate signal
• Side G signal
• VDC malfunction signal
• VDC OFF switch signal
• Master cylinder fluid pressure signal
Mainly receives the following signals from electrically-driven intelligent brake unit via CAN
communication and brake communication (CAN communication).
• Electrically-driven intelligent brake control signal
• Brake assist request signal
• Brake power supply backup operation signal
• Brake power supply backup operation request signal
• Brake warning lamp request signal
• Brake system warning lamp request signal
VCM
Mainly transmits the following signals to electrically-driven intelligent brake unit via CAN
communication.
• VCM control signal
• Current regenerative torque signal
• VCM status signal
• Shift position signal
Mainly receives the following signal from electrically-driven intelligent brake unit via CAN
communication.
• Target braking force signal
BCM
Mainly transmits the following signals to electrically-driven intelligent brake unit via CAN
communication.
• Sleep wake up signal
• Power switch ON signal
• Door switch signal
Steering angle sensor
Mainly transmits the following signal to electrically-driven intelligent brake unit via CAN
communication.
• Steering angle sensor signal
Combination meter
Mainly receives the following signals from ABS actuator electric unit (control unit) via elec-
trically-driven intelligent brake unit via CAN communication.
• Brake warning lamp signal
• Brake system warning lamp signal
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст