Haptic braking method and system
AssigneeDelphi Technologies, Inc.
InventorsHubert B. Riley, George Kuo
Life of this patent
Estimating the term…
Abstract
A haptic braking method and system is disclosed. A controller operates a pump to apply brake fluid to a brake when it is necessary to decelerate a wheel during an active cruise control mode of a vehicle. The controller further operates one or more valves to cyclically vary a pressure level of the brake fluid to cause one or more haptic movements of the brake.
Claims24
A haptic braking method for a vehicle having a wheel and a brake adjacent the wheel, comprising:
- receiving a first signal indicative of a request to decelerate the wheel in a haptic manner;
- applying a supply of brake fluid to the brake in response to said first signal;
- and
- cyclically varying a pressure level of said supply of brake fluid over at least one cycle.
A haptic braking method for a vehicle having a wheel and a brake adjacent the wheel, comprising:
- receiving a first signal indicative of a request to decelerate the wheel in a haptic manner;
- operating a pump to apply a supply of brake fluid to the brake in response to said first signal;
- and
- operating a set of at least one valve to cyclically vary a pressure level of said supply of brake fluid over at least one cycle.
A haptic braking system for a vehicle having a wheel and a brake adjacent the wheel, comprising:
- a controller operable to provide a least one control signal in response a first signal indicative of a request to decelerate the wheel in a haptic manner;
- a pump operable to apply a supply of brake fluid to the brake in response to a first control signal of said at least one control signal;
- and
- a valve operable to cyclically vary a pressure level of said supply of brake fluid over at least one cycle in response to a second control signal of said at least one control signal.
A haptic braking system for a vehicle having a wheel and a brake adjacent the wheel, said system comprising:
- a means for applying a supply of brake fluid to the brake in response a first signal indicative of a request to decelerate the wheel in a haptic manner;
- and
- a means for cyclically varying a pressure level of said supply of brake fluid over at least one cycle.
A haptic braking method for a vehicle having a wheel and a brake adjacent the wheel, comprising:
- receiving a first signal indicative of a request to decelerate the wheel in a haptic manner;
- applying a supply of brake fluid to the brake in response to said first signal;
- cyclically varying a pressure level of said supply of brake fluid over at least one cycle;
- and
- establishing a time interval for said cyclically varying of said pressure level of said brake fluid as a function of a temperature ambient the vehicle.
A haptic braking method for a vehicle having a wheel and a brake adjacent the wheel, comprising:
- receiving a first signal indicative of a request to decelerate the wheel in a haptic manner;
- operating a pump to apply a supply of brake fluid to the brake in response to said first signal;
- operating a set of at least one valve to cyclically vary a pressure level of said supply of brake fluid over at least one cycle;
- and
- establishing a time interval for said operating of said set of at least one valve as a function of a temperature ambient the vehicle.
A haptic braking system for a vehicle having a wheel and a brake adjacent the wheel, comprising:
- a controller operable to provide a least one control signal in response a first signal indicative of a request to decelerate the wheel in a haptic manner;
- a pump operable to apply a supply of brake fluid to the brake in response to a first control signal of said at least one control signal;
- and
- a valve operable to cyclically vary a pressure level of said supply of brake fluid over at least one cycle in response to a second control signal of said at least one control signal;
- and
- wherein said controller is further operable to establish a time interval for providing said first control signal and said second control signal as a function of a temperature ambient the vehicle.
A haptic braking system for a vehicle having a wheel and a brake adjacent the wheel, said system comprising:
- a means for applying a supply of brake fluid to the brake in response to a first signal indicative of a request to decelerate the wheel in a haptic manner;
- a means for cyclically varying a pressure level of said supply of brake fluid over at least one cycle;
- and
- a means for establishing a time interval for said cyclically varying of said pressure level of said brake fluid as a function of a temperature ambient the vehicle.
Dependencies are inferred from the claim text.