STROKE SIMULATOR AND BRAKE CONTROL APPARATUS
A stroke simulator generates a reaction force in response to the operation of a brake pedal. The stroke simulator includes a stroke simulator housing, a stroke simulator piston, disposed slidably in the housing, which divides the interior of the stroke simulator housing into a first volumetric chamber and a second volumetric chamber, a stroke simulator spring, disposed in the second volumetric chamber, which generates a reaction force in response to the operation of the brake pedal by elastic deformation caused by the sliding of the stroke simulator piston, and a first supply port and a second supply port, provided for the first volumetric chamber and the second volumetric chamber, respectively, which are capable of supplying the operating oil pressure into the respective volumetric chambers when the brake pedal is operated.
1 . A stroke simulator operative to generate a reaction force in response to an operation of a brake pedal, the stroke simulator comprising:
a housing;
a piston disposed slidably in the housing, the piston dividing the interior of the housing into a first volumetric chamber and a second volumetric chamber;
an elastic member disposed in at least one of the first volumetric chamber and the second volumetric chamber, the elastic member generating a reaction force in response to the operation of the brake pedal by elastic deformation caused by the sliding of the piston; and
supply ports one each provided for the first volumetric chamber and the second volumetric chamber, the supply ports capable of supplying an operating oil pressure into the respective volumetric chambers when the brake pedal is operated.
2 . A stroke simulator according to claim 1 , wherein the piston comprising the area of a pressure receiving face on a side of the first volumetric chamber and the area of a pressure receiving face on a side of the second chamber which differs from the area of a pressure receiving face on a side of the first volumetric chamber.
3 . A brake control apparatus comprising:
a wheel cylinder configured to apply a braking force to a wheel by supplying an operating oil pressure thereto;
a brake pedal operated by a driver;
a master cylinder configured to send out the operating oil pressurized in response to a press of the brake pedal;
a master cut valve configured to shut off a flow between the master cylinder and the wheel cylinder; and
a stroke simulator disposed between the master cylinder and the master cut valve, the stroke simulator generating a reaction force in response to an operation of the brake pedal,
the stroke simulator including:
a housing;
a piston disposed slidably in the housing, the piston dividing the interior of the housing into a first volumetric chamber and a second volumetric chamber;
an elastic member disposed in at least one of the first volumetric chamber and the second volumetric chamber, the elastic member generating a reaction force in response to the operation of the brake pedal by elastic deformation caused by the sliding of the piston; and
supply ports one each provided for the first volumetric chamber and the second volumetric chamber, the supply ports capable of supplying the operating oil pressure into the respective volumetric chambers when the brake pedal is operated.
4 . A brake control apparatus according to claim 3 , wherein the piston is such that the area of a pressure receiving face on a side of the first volumetric chamber differs from the area of a pressure receiving face on a side of the second volumetric chamber.