Multi-circuit brake installations for vehicles |
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| 申请号 | US26294672 | 申请日 | 1972-06-15 | 公开(公告)号 | US3876225A | 公开(公告)日 | 1975-04-08 |
| 申请人 | ALT CLAUS CHRISTIAN; MULLER ALF; | 发明人 | ALT CLAUS-CHRISTIAN; MULLER ALF; | ||||
| 摘要 | A multi-circuit brake installation for vehicles having at least three separate and independent braking circuits for braking the wheels. A master cylinder is provided with at least three pistons arranged serially therewithin. These pistons serve to separate the braking circuits and are arranged to collapse against an adjacent piston or end wall of the cylinder upon failure of the braking circuit immediately in communication with the respective pistons. One arrangement with three braking circuits has a separate circuit for each of the front steerable wheels and a third circuit for the two rear wheels. A steering connection for this one arrangement provides for a negative or small roll radius at the steerable front wheels. | ||||||
| 权利要求 | 1. A multi-circuit brake installation for a vehicle of the type having rear wheels and steerable front wheels; said installation comprising: brakes at each of said front wheels, a common master cylinder having a plurality of separate pressure spaces for accommodating braking fluid, separate brake circuits for communicating braking fluid from respective ones of said pressure spaces to respective ones of the brakes at the front wheels, said brake circuits being formed with respective separate fluid lines leading directly from respective ones of said separate pressure spaces to respective ones of the brakes at the front wheels such that failure of one of said brake circuits for the brakes at one of said front wheels will not cause failure of the brake circuit for the brakes of the other of said front wheels, the brake circuit for the brakes at one of said front wheels being interconnected with the brake circuit for the brakes at the other of said front wheels only by way of the respective separate fluid lines leading directly to respective separate pressure spaces of the common master cylinder, and steering connecting means for connecting the steerable front wheels to the vehicle steering system such that the front wheels have a negative roll radius. 2. A multi-circuit brake installation for a vehicle with a steerable front wheel according to claim 1, characterized in that the roll radius at the steerable front wheels is relatively small. 3. A multi-circuit brake installation according to claim 2, characterized in that said common master cylinder is a triple-tandem-master brake cylinder with three pistons disposed one behind the other. 4. A multi-circuit brake installation according to claim 1, characterized in that the roll radius is nearly zero. 5. An installation according to claim 1, characterized in that said connecting means includes: a steering knuckle pin associated with each front wheel, an upper transverse guide member connected to an upper point on said knuckle pin, and a lower transverse guide member connected to a lower point on said knuckle pin, the line between the upper and lower points defining a steering axis which intersects with a horizontal road surface at a point outwardly with respect to a vertical wheel plane extending upwardly from the normal wheel contact point with the road surface. 6. A multi-circuit brake installation according to claim 5, characterized in that a triple-tandem-master brake cylinder with three pistons disposed one behind the other is provided as master brake cylinder means. 7. A multi-circuit brake installation according to claim 5, characterized in that the brake installation is constructed as three-circuit brake system. 8. An installation according to claim 5, wherein each of the brakes controlled by the respective brake circuits are disk brakes. 9. An installation according to claim 8, wherein each of said disk brakes is of the type utilizing a simple saddle as contrasted to double-brake saddles. 10. An installation according to claim 5, wherein said common master cylinder is constructed as a cylinder with a plurality of pistons disposed inside of said cylinder one behind the other, each of said separate pressure sources being bounded on one side by one of said pistons and on the other side by one of another of said pistons and an end wall of said cylinder. 11. An installation according to claim 10, wherein each of the brakes controlled by the respective brake circuits are disk brakes. 12. An installation according to claim 1, characterized in that four braking circuits are provided such that said rear wheels have separate braking circuits. 13. An installation according to claim 12, wherein each of the brakes controlled by the respective brake circuits are disk brakes. 14. An installation according to claim 1, wherein said common master cylinder is constructed as a cylinder with a plurality of pistons disposed inside of said cylinder one behind the other, each of said separate pressure sources being bounded on one side by one of said pistons and on the other side by one of another of said pistons and an end wall of said cylinder. 15. An installation according to claim 14, wherein each of the brakes controlled by the respective brake circuits are disk brakes. 16. An installation according to claim 15, wherein a total of three separate braking circuits are provided, a first and a second of said circuits controlling brakes at respective ones of said steerable front wheels and a third of said circuits controlling a pair of rear vehicle wheels. 17. An installation according to claim 15, wherein a total of four separate braking circuits are provided for controlling respective brakes at each of two steerable front and two rear wheels. 18. An installation according to claim 15, wherein each of said disk brakes is of the type utilizing a simple saddle as contrasted to double-brake saddles. 19. An installation according to claim 1, wherein each of the brakes controlled by the respective brake circuits are disk brakes. |
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