09.06.2016, 23:44
sind solche Bremseingriffe auch bei C5 bekannt?
VSES Beschreibung aus Service Manual fur C5:
Vehicle Stability Enhancement System (VSES)
The vehicle stability enhancement system (VSES) includes an additional level of vehicle control to the EBCM.
The VSES is activated by the EBCM calculating the desired yaw rate and comparing it to the actual yaw rate
input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral
acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a
measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to
correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.
The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and
side slip rate error. The side slip rate error is a function of the lateral acceleration minus the product of the yaw
rate and vehicle speed. The yaw rate error and side slip rate error are combined to produce the total delta
velocity error. When the delta velocity error becomes too large and the VSES system activates, the driver's
steering inputs combined with the differential braking will attempt to bring the delta velocity error toward zero.
The EBCM also uses the input from the brake fluid pressure sensor for more accurate braking control during
VSES.
The VSES activations generally occur during aggressive driving, in the turns or bumpy roads without much use
of the accelerator pedal. When braking during VSES activation, the brake pedal will feel different than the ABS
pedal pulsation. The brake pedal pulsates at a higher frequency during VSES activation.
VSES Beschreibung aus Service Manual fur C5:
Vehicle Stability Enhancement System (VSES)
The vehicle stability enhancement system (VSES) includes an additional level of vehicle control to the EBCM.
The VSES is activated by the EBCM calculating the desired yaw rate and comparing it to the actual yaw rate
input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral
acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a
measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to
correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.
The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and
side slip rate error. The side slip rate error is a function of the lateral acceleration minus the product of the yaw
rate and vehicle speed. The yaw rate error and side slip rate error are combined to produce the total delta
velocity error. When the delta velocity error becomes too large and the VSES system activates, the driver's
steering inputs combined with the differential braking will attempt to bring the delta velocity error toward zero.
The EBCM also uses the input from the brake fluid pressure sensor for more accurate braking control during
VSES.
The VSES activations generally occur during aggressive driving, in the turns or bumpy roads without much use
of the accelerator pedal. When braking during VSES activation, the brake pedal will feel different than the ABS
pedal pulsation. The brake pedal pulsates at a higher frequency during VSES activation.