Brake force control apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroaki Yoshida
Life of this patent
Estimating the term…
Abstract
A brake force control apparatus is provided that performs a brake assist control in which a brake force larger than that of a normal time is generated when an emergency braking is required in a vehicle, and prevents a change in a driving stability when an abnormality occurs in a vehicle characteristic changing control for maintaining the driving stability of the vehicle. When an abnormality is detected (steps 102, 106-114) in one of the vehicle characteristic changing controls, an increasing slope of a brake force of rear wheels is decreased (step 104) in the brake assist control. Alternatively, the brake assist control may be prohibited (step 140).
Claims7
A brake force control apparatus adapted to be provided on a vehicle having a vehicle characteristic changing apparatus for controlling a driving stability of the vehicle, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- pressure increasing slope controlling means for decreasing an increasing slope of a brake force of at least rear wheels among front and rear wheels of said vehicle so that the increasing slope becomes smaller than that achieved during a normal time of the vehicle characteristic changing apparatus when the operational state of the brake pedal satisfies the predetermined condition and when an abnormality occurs in said vehicle characteristic changing apparatus.
A brake force control apparatus adapted to be provided on a vehicle having a vehicle characteristic changing apparatus for controlling a driving stability of the vehicle, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- control prohibiting means for prohibiting an execution of said brake assist control when an abnormality occurs in said vehicle characteristic changing apparatus regardless of whether or not the operational state of the brake pedal satisfies the predetermined condition.
A brake force control apparatus adapted to be provided on a vehicle having a vehicle characteristic changing apparatus for controlling a driving stability of the vehicle by controlling a brake force, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- control prohibiting means for prohibiting an execution of said brake assist control when an abnormality occurs in said vehicle characteristic changing apparatus regardless of whether or not the operational state of the brake pedal satisfies the predetermined condition.
A brake force control apparatus adapted to be provided on a vehicle having a vehicle characteristic changing apparatus for controlling a driving stability of the vehicle, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- brake assist control terminating means for terminating an execution of said brake assist control and executing the normal control when an abnormality occurs in said vehicle characteristic changing apparatus during execution of the brake assist control.
A brake force control apparatus adapted to be provided on a vehicle having a plurality of vehicle characteristic changing apparatuses for controlling a driving stability of the vehicle, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- brake assist control terminating means for terminating an execution of said brake assist control and executing the normal control when an abnormality occurs in said vehicle characteristic changing apparatuses associated with a control of a brake force during the execution of the brake assist control;
- and
- pressure increasing slope controlling means for decreasing an increasing slope of a brake force of at least rear wheels among front and rear wheels of said vehicle so that the increasing slope becomes smaller than that achieved during a normal time of the vehicle characteristic changing apparatuses when the operational state of the brake pedal satisfies the predetermined condition and when an abnormality occurs in said vehicle characteristic changing apparatuses other than that associated with the control of the brake force.
A brake force control apparatus adapted to be provided on a vehicle having a vehicle characteristic changing apparatus for controlling a driving stability of the vehicle, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- abnormality detecting means for detecting an abnormality of said vehicle characteristic changing apparatus;
- brake assist control start determining means for determining a start of an execution of the brake assist control;
- and
- pressure increasing slope controlling means for decreasing an increasing slope of a brake force of at least rear wheels among front and rear wheels of said vehicle so that the increasing slope becomes smaller than that achieved during a normal time of the vehicle characteristic changing apparatus when an abnormality of said vehicle characteristic changing apparatus is detected and when the brake assist control is started.
A brake force control apparatus adapted to be provided on a vehicle having a plurality of vehicle characteristic changing apparatuses for controlling a driving stability of the vehicle, the brake force control apparatus performing a normal control for generating a brake force corresponding to a brake pressing force and a brake assist control for increasing a ratio of a brake force to a pressing force applied to a brake pedal to be larger than that of the normal control when an operational state of the brake pedal satisfies a predetermined condition, comprising:
- abnormality detecting means for detecting an abnormality of each of said vehicle characteristic changing apparatuses;
- brake assist control start determining means for determining a start of an execution of the brake assist control;
- and
- pressure increasing slope controlling means for decreasing an increasing slope of a brake force of at least rear wheels among front and rear wheels of said vehicle so that the increasing slope becomes smaller than that achieved during a normal time of the vehicle characteristic changing apparatuses when an abnormality is detected in said vehicle characteristic changing apparatuses other than that associated with a control of the brake force and when the brake assist control is started.
Dependencies are inferred from the claim text.