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US 10,293,800 B2Granted
Brake system
AssigneeHitachi Automotive Systems, Ltd.
InventorsWataru Yokoyama, Kimio Nishino, Kenichiro Matsubara, Hiroshi Chikuma, Kenji Hashida
Life of this patent
Estimating the term…
Abstract
A parking brake controller (19) activates an electric actuator (43) in response to operation of a parking switch (18) to hold a disc brake (31) to serve as a parking brake. If a failure (fault) is detected in the parking switch (18), the parking brake controller (19) activates the electric actuator (43) so as to hold the parking brake automatically upon detecting a condition that presumes the vehicle operator's intent not to drive any longer while the vehicle is at rest.
Claims20
A brake system comprising:
- a brake mechanism configured to propel a friction member by use of a pressing member on the basis of operation of a brake pedal, the friction member being disposed to come into contact with a rotating member rotating with a wheel of a vehicle;
- a parking mechanism operated with an electric motor to hold the wheel non-rotatably and release it;
- and
- a controller configured to actuate the electric motor in accordance with operation of a parking switch configured to hold and release the parking mechanism,
- the controller being further configured to detect any fault in the parking switch and obtain a state of the vehicle's starter switch,
- wherein if a fault is detected in the parking switch by the controller and if a state that the vehicle's starter switch is on is obtained by the controller, the electric motor is actuated to hold the parking mechanism upon detecting a condition that presumes that the vehicle operator intends not to drive any longer while the vehicle's drive unit is in drivable mode and the vehicle is at rest.
3 more elements
A brake system comprising:
- a brake mechanism configured to propel a friction member by use of a pressing member, based on operation of a brake pedal, the friction member being disposed to come into contact with a rotating member rotating with a wheel of a vehicle;
- a parking mechanism operated with an electric motor to hold the wheel non-rotatably and release it;
- and
- a controller configured to actuate the electric motor, in accordance with operation of a parking switch configured to hold and release the parking mechanism,
- the controller being further configured to detect any fault in the parking switch and obtain a state of the vehicle's starter switch,
- wherein if a fault is detected in the parking switch by the controller and if a state that the vehicle's starter switch is on is obtained by the controller, the electric motor is actuated so as to hold the parking mechanism:
- when the brake pedal has been stepped on for a first predetermined time while the vehicle is at rest.
4 more elements
A brake system comprising:
- a brake mechanism configured to propel a friction member by use of a pressing member, based on operation of a brake pedal, the friction member being disposed to come into contact with a rotating member rotating with a wheel of a vehicle;
- a parking mechanism operated with an electric motor to hold the wheel non-rotatably and release it;
- and
- a controller configured to actuate the electric motor, in accordance with operation of a parking switch configured to hold and release the parking mechanism,
- the controller further configured to detect any fault in the parking switch and obtain a state of the vehicle's starter switch,
- wherein if a fault is detected in the parking switch by the controller and if a state that the vehicle's starter switch is on is obtained by the controller, the electric motor is actuated so as to hold the parking mechanism:
- when there is detected a condition that presumes the vehicle operator's exit from the vehicle while the vehicle is at rest.
4 more elements
Dependencies are inferred from the claim text.