The brake system includes a pedal, a pedal simulator, and a brake pedal unit. The brake pedal unit includes an input piston connected to the brake pedal for operating the pedal simulator during a normal braking mode. The brake pedal unit further includes first and second output pistons actuated by t
The brake system includes a pedal, a pedal simulator, and a brake pedal unit. The brake pedal unit includes an input piston connected to the brake pedal for operating the pedal simulator during a normal braking mode. The brake pedal unit further includes first and second output pistons actuated by the input piston during a manual push through mode such that the first output piston generates brake actuating pressure at a first output of the brake pedal unit, and the second output piston generates actuating pressure at a second output of the brake pedal unit. The brake system further includes a hydraulic pressure source for supplying fluid at a controlled boost pressure, and a hydraulic control unit adapted to be hydraulically connected to the brake pedal unit and the hydraulic pressure source. The hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode wherein the brake actuating pressure from the first and second output pistons is supplied to the first and second vehicle brakes, respectively.
대표청구항▼
1. A brake system comprising: a brake pedal;a pedal simulator;a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input pis
1. A brake system comprising: a brake pedal;a pedal simulator;a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input piston during a manual push through mode such that said first output piston generates brake actuating pressure at a first output of said brake pedal unit and said second output piston generates actuating pressure at a second output of said brake pedal unit;a hydraulic pressure source for supplying fluid at a controlled boost pressure; anda hydraulic control unit adapted to be hydraulically connected to said brake pedal unit and said hydraulic pressure source, wherein said hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode, wherein the brake actuating pressure from said first and second output pistons is supplied to the first and second vehicle brakes, respectively;wherein said first and second output pistons are aligned axially with respect to one another and configured in a nested arrangement such that a portion of one output piston is disposed in a recess of the other output piston. 2. The brake system of claim 1, wherein the input piston and said first and second output pistons are aligned axially with respect to one another. 3. The brake system of claim 1, wherein said first and second output pistons are mechanically connected together. 4. A brake system comprising: a brake pedal;a pedal simulator;a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input piston during a manual push through mode such that said first output piston generates brake actuating pressure at a first output of said brake pedal unit and said second output piston generates actuating pressure at a second output of said brake pedal unit;a hydraulic pressure source for supplying fluid at a controlled boost pressure; anda hydraulic control unit adapted to be hydraulically connected to said brake pedal unit and said hydraulic pressure source, wherein said hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode, wherein the brake actuating pressure from said first and second output pistons is supplied to the first and second vehicle brakes, respectively; wherein said first and second output pistons are mechanically connected together to limit the movement of said first output piston relative to said second output piston. 5. The brake system of claim 4, wherein said brake pedal unit includes a first spring biasing said second output piston axially away from said first output piston. 6. The brake system of claim 5, wherein said brake pedal unit further includes a second spring biasing said second output piston axially towards said first output piston. 7. The brake system of claim 4, wherein a first output chamber is defined by a bore formed in a housing of said brake pedal unit, said first output piston, and said second output piston, and wherein a second output chamber is defined by said bore of said housing and said second output piston, and wherein said first and second output pistons are mechanically connected together such that an increase in pressure of said first output chamber relative to the pressure within said second output chamber prevents said second output piston from moving further away from said first output piston. 8. A brake system comprising: a brake pedal;a pedal simulator;a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input piston during a manual push through mode such that said first output piston generates brake actuating pressure at a first output of said brake pedal unit and said second output piston generates actuating pressure at a second output of said brake pedal unit;a hydraulic pressure source for supplying fluid at a controlled boost pressure; anda hydraulic control unit adapted to be hydraulically connected to said brake pedal unit and said hydraulic pressure source, wherein said hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode, wherein the brake actuating pressure from said first and second output pistons is supplied to the first and second vehicle brakes, respectively; wherein a first output chamber is defined by a bore formed in a housing of said brake pedal unit, an outer cylindrical surface of said first output piston, and said second output piston such that said first output chamber has annular shape surrounding a portion of said second output piston, and wherein a second output chamber having a generally cylindrical shape is defined by said bore of said housing and an end of said second output piston. 9. A brake system comprising: a brake pedal;a pedal simulator;a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input piston during a manual push through mode such that said first output piston generates brake actuating pressure at a first output of said brake pedal unit and said second output piston generates actuating pressure at a second output of said brake pedal unit;a hydraulic pressure source for supplying fluid at a controlled boost pressure; anda hydraulic control unit adapted to be hydraulically connected to said brake pedal unit and said hydraulic pressure source, wherein said hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode, wherein the brake actuating pressure from said first and second output pistons is supplied to the first and second vehicle brakes, respectively; and further including a sliding member connected to said input piston and slidably engaging an engagement surface of an elastomeric member during axial movement of said input piston, wherein the sliding engagement between said sliding member and said engagement surface provides a progressively increasing rate of friction therebetween as the input piston advances in the brake pedal unit, and wherein said elastomeric member is attached to said first output piston. 10. The brake system of claim 9, wherein said elastomeric member is mounted in a recess formed in the first output piston. 11. The brake system of claim 9, wherein said elastomeric member includes a bore having an inner wall defining said engagement surface, and wherein said sliding member slidably engages said inner wall of said bore. 12. The brake system of claim 11, wherein said inner wall includes a plurality of radially inwardly extending ribs. 13. The brake system of claim 12, wherein said plurality of ribs define said engagement surface and include surfaces which are sloped relative to the axial direction of travel of said input piston. 14. The brake system of claim 13, wherein said sliding member includes a cylindrical outer surface which engages with said plurality of ribs. 15. A brake system comprising: a brake pedal;a pedal simulator;a brake pedal unit including an input piston connected to said brake pedal for operating said pedal simulator during a normal braking mode, said brake pedal unit further including first and second output pistons actuated by said input piston during a manual push through mode such that said first output piston generates brake actuating pressure at a first output of said brake pedal unit and said second output piston generates actuating pressure at a second output of said brake pedal unit;a hydraulic pressure source for supplying fluid at a controlled boost pressure; anda hydraulic control unit adapted to be hydraulically connected to said brake pedal unit and said hydraulic pressure source, wherein said hydraulic control unit includes a slip control valve arrangement and a switching base brake valve arrangement for switching the brake system between the normal braking mode, wherein boost pressure from the hydraulic pressure source is supplied to first and second vehicle brakes, and the manual push through mode, wherein the brake actuating pressure from said first and second output pistons is supplied to the first and second vehicle brakes, respectively; wherein said pedal simulator includes a caged spring assembly positioned between said input piston and said first output piston, and wherein said caged spring assembly includes first, second, and third simulator springs each having a different spring rate. 16. The brake system of claim 15, wherein each of said first, second, and third simulator springs are preloaded when said brake pedal unit is in a rest mode such that pressure is not generated in said pedal simulator, said first output chamber, and said second output chamber. 17. The brake system of claim 16, wherein said first simulator spring acts against said second simulator spring via a first separator member, and wherein said second simulator spring acts against said third simulator spring via a second separator member.
Belart Juan (Walldorf DEX) Burgdorf Jochen (Offenbach-Rumpenheim DEX) Kircher Dieter (Frankfurt am Main DEX) Steffes Helmut (Eschborn DEX) Bleckmann Hans-Wilheim (Obermoerlen DEX) Goosens AndrF. L. (, Auxiliary power assisted master cylinder arrangement for a vehicle brake system.
Ohlig,Benedikt; Giering,Wilfried; Michels,Erwin; Steinheuer,Herbert, Brake power generator for a hydraulic motor vehicle brake system, and hydraulic motor vehicle brake system.
Leiber Heinz (Oberriexingen DEX), Brake unit with brake booster, two master cylinders for antilock and/or propulsion or slip control situated in common ho.
Campau Gregory P. ; Kingston Andrew W.,DEX ; Ferger Robert L.,DEX ; Weigert Thomas,DEX ; Oliveri Salvatore,DEX ; Ganzel Blaise J. ; Luckevich Mark S., Electronic brake management system with manual fail safe.
Lubbers Mark D. ; Barron Richard J. ; Hunnicutt Harry A. ; Tang Louis S. ; Krawczyk Gregory J., Electronically controlled hydraulic brake boost pressure control system.
Heckmann Hans,DEX ; Winner Hermann,DEX ; Schunck Eberhardt,DEX ; Gaillard Alain,DEX, Method and device for regulating the pressure in at least one wheel brake.
Belart Juan (Walldorf DEX) Burgdorf Jochen (Neugasse DEX) Kircher Dieter (Frankfurt am Main DEX) Weise Lutz (Mainz DEX), Pressure control arrangement for vehicle braking system with antiskid control equipment.
Symes Randall A. (West Allis WI) Zablocki Richard J. (West Allis WI), System for disabling, enabling and otherwise controlling vehicle functions based upon continuous measurement of clutch w.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.