Brake fluid pressure control apparatus for vehicle
First Claim
1. A brake fluid pressure control apparatus for executing rollover prevention control, wherein a brake is applied to at least one wheel of a vehicle when a rollover tendency of the vehicle is detected from a rollover detection parameter being greater than a parameter threshold value while the vehicle is turning, the brake fluid pressure control apparatus comprising:
- a parameter acquisition unit configured to acquire the rollover detection parameter;
a parameter calculation unit configured to set the parameter threshold value,wherein the parameter acquisition unit acquires a roll angle of the vehicle as the rollover detection parameter, andwherein the parameter calculation unit calculates a threshold calculation roll rate, which is a rate of change of the roll angle of the vehicle, and sets the parameter threshold value to a smaller value with an increase in the threshold calculation roll rate; and
a steering maneuver determination unit configured to determine whether or not an abrupt steering maneuver is made,wherein the parameter calculation unit is configured to calculate a composition roll rate as the threshold calculation roll rate, by combining at a predetermined weight assignment ratio a first roll rate which is a rate of change of a first roll angle equivalent to an actual roll angle with a second roll rate which is a rate of change of a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, andwherein the parameter calculation unit calculates the composition roll rate by changing the weight assignment ratio such that a weight of the second roll rate is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.
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Abstract
A brake fluid pressure control apparatus for a vehicle includes a parameter calculation unit configured to calculate a rollover detection parameter; and a steering maneuver determination unit configured to determine whether an abrupt steering maneuver is made. The parameter calculation unit is configured to calculate a first composition roll angle as the rollover detection parameter, by combining at a predetermined weight assignment ratio a first roll angle equivalent to an actual roll angle with a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and to calculate the first composition roll angle by changing the weight assignment ratio such that a weight of the second roll angle is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made.
38 Citations
6 Claims
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1. A brake fluid pressure control apparatus for executing rollover prevention control, wherein a brake is applied to at least one wheel of a vehicle when a rollover tendency of the vehicle is detected from a rollover detection parameter being greater than a parameter threshold value while the vehicle is turning, the brake fluid pressure control apparatus comprising:
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a parameter acquisition unit configured to acquire the rollover detection parameter; a parameter calculation unit configured to set the parameter threshold value, wherein the parameter acquisition unit acquires a roll angle of the vehicle as the rollover detection parameter, and wherein the parameter calculation unit calculates a threshold calculation roll rate, which is a rate of change of the roll angle of the vehicle, and sets the parameter threshold value to a smaller value with an increase in the threshold calculation roll rate; and a steering maneuver determination unit configured to determine whether or not an abrupt steering maneuver is made, wherein the parameter calculation unit is configured to calculate a composition roll rate as the threshold calculation roll rate, by combining at a predetermined weight assignment ratio a first roll rate which is a rate of change of a first roll angle equivalent to an actual roll angle with a second roll rate which is a rate of change of a second roll angle obtained using a parameter which changes with a phase earlier than the first roll angle, and wherein the parameter calculation unit calculates the composition roll rate by changing the weight assignment ratio such that a weight of the second roll rate is higher when the steering maneuver determination unit determines that an abrupt steering maneuver is made than when the steering maneuver determination unit determines that the abrupt steering maneuver is not made. - View Dependent Claims (2, 3, 4)
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5. A brake fluid pressure control apparatus for executing rollover prevention control, wherein a brake is applied to at least one wheel of a vehicle when a rollover tendency of the vehicle is detected from a rollover detection parameter being greater than a parameter threshold value while the vehicle is turning, the brake fluid pressure control apparatus comprising:
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a parameter acquisition unit configured to acquire the rollover detection parameter; a parameter calculation unit configured to set the parameter threshold value, wherein the parameter acquisition unit acquires a roll angle of the vehicle as the rollover detection parameter, wherein the parameter calculation unit calculates a threshold calculation roll rate, which is a rate of change of the roll angle of the vehicle, and sets the parameter threshold value to a smaller value with an increase in the threshold calculation roll rate, and wherein the parameter calculation unit calculates a threshold calculation roll rate, which is a rate of change of the roll angle of the vehicle, and sets the parameter threshold value to a smaller value with an increase in a filtered absolute value of the threshold calculation roll rate resulting from a filtering process by which a decrease of the absolute value of the threshold calculation roll rate is retarded. - View Dependent Claims (6)
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Specification