Braking control system comprising a pressure-control simulator
AssigneeRobert Bosch GmbH
InventorsChris Anderson, Raynald Sprocq
Life of this patent
Estimating the term…
Abstract
The invention relates to a brake control system for motor vehicles and, in particular, to a hydraulic control system. The invention also applies to hybrid braking systems such as those provided in hybrid vehicles (vehicles propelled electrically and propelled using internal combustion engines) comprising a hydraulically operating braking system which comprises a simulator (3) not mechanically coupled to the brake booster piston (42) and an electric braking system using the electric propulsion motor or motors as electric generators.
Claims18
Brake control system for a motor vehicle comprising a brake pedal (1), a brake booster (4) which comprises a front chamber (40) and a rear chamber (41) which are separated by a booster piston (42), the booster (4) supplying an amplified braking command dependent on the pressure difference between the two chambers, a brake master cylinder (5) receiving the amplified braking commands from the brake booster (4), characterized in that the brake control system comprises a simulator (3) not mechanically coupled to the piston (42) of the brake booster (4), the simulator receiving at least one braking command from the brake pedal (1) and in return one of establishing and controlling a pressure difference between the front chamber (40) and the rear chamber (41) of the brake booster so as to control the movement of the booster piston (42), and in that the brake booster (4) does not have a piston equipped with a three-way valve secured to the booster piston (42), the simulator (3) including a piston (34) receiving the at least one braking command from the brake pedal, a sensor spindle (301) separate from the piston (34) and operable to control a three-way control valve, and an elastic simulation element (310) transmitting forces between the piston (34) and the sensor spindle (301).
Brake control system for a motor vehicle comprising a brake pedal (1), a brake booster (4) which comprises a front chamber (40) and a rear chamber (41) which are separated by a booster piston (42), the booster (4) supplying an amplified braking command dependent on the pressure difference between the two chambers, a brake master cylinder (5) receiving the amplified braking commands from the brake booster (4), the brake master cylinder (5) not being mechanically coupled to the brake pedal (1), characterized in that the brake control system comprises a simulator (3) not mechanically coupled to the piston (42) of the brake booster (4), the simulator receiving at least one braking command from the brake pedal (1) and in return establishing or controlling a pressure difference between the front chamber (40) and the rear chamber (41) of the brake booster so as to control the movement of the booster piston (42), and in that the brake booster (4) does not have a piston equipped with a three-way valve secured to the booster piston (42), the simulator (3) having a port (308) connected to at least one of a braking circuit (6) and the brake master cylinder (5) so that forces corresponding to variations in pressure in at least one of the braking circuit (6) and the brake master cylinder (5) are passed on to the brake pedal through the simulator (3).
Dependencies are inferred from the claim text.