Vehicle braking apparatus and vehicle braking method
AssigneeDenso Corporation
InventorHiroaki Niino
Life of this patent
Estimating the term…
Abstract
In attaining a target vehicle braking force corresponding to a pedal depression force, an assigned braking force is obtained by subtracting a minimum braking force of a hydraulic braking device corresponding to the pedal depression force from the target vehicle braking force. Then, a distributive braking force of the hydraulic braking device is obtained by subtracting an actual regenerative braking force from the assigned braking force. And, a boost ratio of the hydraulic braking device is controlled based on a target hydraulic braking force which is a sum of the minimum braking force and the distributive braking force. Thus, the braking force of the hydraulic braking device is always utilized for attaining the target vehicle braking force.
Claims15
A vehicle braking apparatus for applying a braking force to a vehicle by summing a braking force of a hydraulic braking device and a braking force of an auxiliary braking device, said vehicle braking apparatus comprising:
- input value detecting means for detecting a brake pedal input value;
- target vehicle braking force output means for outputting a target vehicle braking force corresponding to said brake pedal input value detected by said input value detecting means;
- assigned braking force output means for outputting an assigned braking force which is obtained by subtracting a minimum braking force of said hydraulic braking device corresponding to said brake pedal input value from said target vehicle braking force generated from said target vehicle braking force output means;
- and
- braking control means for obtaining a distributive braking force of said hydraulic braking device which is obtained by subtracting the braking force of said auxiliary braking device from said assigned braking force generated from said assigned braking force output means, and for controlling said hydraulic braking device based on a target hydraulic braking force which is a sum of said minimum braking force and said distributive braking force.
A vehicle braking method for applying a braking force to a vehicle by summing a braking force of a hydraulic braking device and a braking force of an auxiliary braking device, said vehicle braking method comprising the steps of:
- in attaining a target vehicle braking force corresponding to a brake pedal input value,
- obtaining an assigned braking force by subtracting a minimum braking force of said hydraulic braking device corresponding to said brake pedal input value from said target vehicle braking force;
- obtaining a distributive braking force of said hydraulic braking device by subtracting the braking force of said auxiliary braking device from said assigned braking force;
- and
- controlling said hydraulic braking device based on a target hydraulic braking force which is a sum of said minimum braking force and said distributive braking force.
A vehicle braking apparatus for applying a braking force to a vehicle by summing a braking force of a hydraulic braking device and a braking force of an auxiliary braking device, said vehicle braking apparatus comprising:
- input value detecting means for detecting a brake pedal input value;
- target vehicle braking force output means for outputting a target vehicle braking force corresponding to said brake pedal input value detected by said input value detecting means;
- assigned braking force output means for outputting an assigned braking force which is obtained by subtracting a minimum braking force of said hydraulic braking device corresponding to said brake pedal input value from said target vehicle braking force generated from said target vehicle braking force output means;
- and
- auxiliary brake operability judging means for judging whether or not said auxiliary brake device is operable;
- and
- braking control means for responding to judgment result of said auxiliary brake operability judging means,
- wherein when said auxiliary brake operability judging means judges that said auxiliary braking device is operable, said braking control means is for obtaining a distributive braking force of said hydraulic braking device which is obtained by subtracting the braking force of said auxiliary braking device from said assigned braking force generated from said assigned braking force output means, and for controlling said hydraulic braking device based on a target hydraulic braking force which is a sum of said minimum braking force and said distributive braking force,
- and further when said auxiliary brake operability judging means judges that said auxiliary braking device is inoperable, said braking control means is for controlling said hydraulic braking device based on a target hydraulic braking force which is equal to said target vehicle braking force.
Dependencies are inferred from the claim text.