Motor vehicle braking device

• US 20030141158A1
• Filed: 12/20/2002
• Published: 07/31/2003
• Est. Priority Date: 06/29/2000
• Status: Active Grant

• Current Assignee: Sa Beringer
• Original Assignee: Sa Beringer
• Inventors: Beringer, Gilbert
• Granted Patent: US 6,672,437 B2
• Time in Patent Office: Days
• US Class Current: 188/349
• CPC Class Codes: B60T 8/1831 pressure reducing or limiting valves
• CPC Class Codes: B60T 8/261 specially adapted for use in motorcycles
• CPC Class Codes: B60T 8/3225 Systems specially adapted for single-track vehicles, e.g. motorcycles B60T8/3235 takes precedence
• CPC Class Codes: B62L 3/023 acting on fluid pressure systems

Abstract

A motor vehicle braking device includes a piston connected to the hydraulic braking circuit and connected to at least one damping element of the rear wheel or wheels, to measure the load exerted on the rear wheel or wheels. The device also includes a valve able to decrease the pressure at the calipers of the front wheel or wheels and able to supply the necessary load to the rear wheel or wheels of the vehicle to prevent any unwanted lifting of said rear wheel or wheels in the event of heavy breaking.

Claims

1. A vehicle braking device comprising a master cylinder connected hydraulically to calipers mounted at the members that brake the wheels of the vehicle, said calipers accommodating pistons to act, under a pressure force, on part of said members, said device being characterized in that it comprises means (1) which are connected to the hydraulic braking circuit and connected to at least one damping element of the rear wheel or wheels, said means (1) being able to measure the load exerted on the rear wheel or wheels in conjunction with means (VA) able to decrease the pressure at the calipers of the front wheel or wheels and able to supply the necessary load to the rear wheel or wheels of the vehicle to prevent any unwanted lifting of said rear wheel or wheels in the event of heavy braking.

2. The device as claimed in claim 1, characterized in that the means able to measure the load exerted on the rear wheel or wheels consist of a piston (1) mounted coaxially with respect to the damping element and able to be displaced linearly, in a limited manner, with the ability for sealed guidance in a recess (2a) of a block (2) secured to a fixed part of the vehicle, said recess (2a) being in communication with the hydraulic braking circuit at the master cylinder and the caliper of the front wheel or wheels.

3. The device as claimed in claim 1, characterized in that the means able to reduce the pressure consist of a valve (VA) mounted coaxially at the end of the piston (1) in conjunction with arrangements to be controlled under the effect of the displacement of said piston (1) with a view to regulating the hydraulic pressure particularly at the caliper of the front wheel or wheels.

4. The device as claimed in claim 3, characterized in that the valve comprises a body (4) secured to a bore (1a) formed at the end of the piston (1), said body (4) having an internal recess (4a) acting as a seat for a ball (5) subject to an elastic member (6), said recess (4a) being in communication with the hydraulic circuit of the master cylinder, the ball being able to collaborate with a fixed element (9) under the effect of the displacement of the piston (1) to move it away from its seat (4a).

5. The device as claimed in either of claims 1 and 4, characterized in that, under the effect of a load considered as normal, exerted on the rear wheel or wheels, the piston (1) of the valve is in abutment against a fixed part of the support block (2), the ball being away from its seat to allow fluid from the master cylinder to pass toward the caliper of the front wheel or wheels;

conversely, when said load is not considered to be sufficient, there is a relative displacement of the piston (1) of the valve and of the block (2) as far as another extreme position of abutment corresponding to the ball (5) being positioned in the bottom of its seat (4a) to reduce the pressure sent to said caliper.

6. The device as claimed in claim 4, characterized in that the fixed element (9) collaborating with the ball (5) consists of a screw secured to the support block (2) and opening into the recesses (2a) and (4a) of said block (2) and of the body (4) of the valve.

7. The device as claimed in claim 2, characterized in that the support block (2) in which the piston (1) of the valve is mounted with the capability for linear displacement is coupled to the damping element in conjunction with means of adjusting the load exerted on the rear wheel or wheels.

8. The device as claimed in claim 1, characterized in that the piston (1) of the valve is mounted inside the block (2) with the capacity for linear displacement against a hydraulic damping means.