Brake system of motorcycle

Abstract

A reduction in size, weight and cost of a brake system of a motorcycle provided with a circulating-type ABS is achieved by a brake system provided with a circulating-type ABS and a by-wire-type brake system. In the brake system, solenoid valves, hydraulic pressure sensors, accumulators and pumps are integrated into a unit, and concurrently stroke simulators are attached to the unit as separate bodies.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a right side elevational view of a motorcycle of an embodiment of the present invention;

FIG. 2 is an explanatory diagram of a constitution of a brake system of the motorcycle;

FIG. 3 is an explanatory diagram of a first operation of FIG. 2;

FIG. 4 is an explanatory diagram of a second operation of FIG. 2;

FIG. 5 is an explanatory diagram of a constitution of a brake system of a second embodiment of the present invention;

FIG. 6 is an explanatory diagram of a constitution for showing a first application of the brake system shown in FIG. 2;

FIG. 7 is an explanatory diagram of a constitution for showing a second application of the brake system shown in FIG. 2; and

FIG. 8 is a perspective view of a motorcycle provided with the brake system shown in FIG. 6, as viewed from the rear right of the motorcycle.

Claims

1. A brake system of a motorcycle, comprising: a circulating-type ABS, said circulating-type ABS including: an ABS solenoid valve that blocks a hydraulic pressure passage between a caliper and a master cylinder; andan accumulator that receives hydraulic pressure of the caliper when the solenoid blocks the hydraulic pressure passage; anda pump that circulates brake fluid from the accumulator to the hydraulic pressure passage; anda by-wire-type brake system, said by-wire-type brake system including: a by-wire solenoid valve that blocks a hydraulic pressure passage between the master cylinder and the ABS;a first hydraulic pressure sensor that detects the hydraulic pressure of the master cylinder;a second hydraulic pressure sensor that detects the hydraulic pressure of the caliper;a stroke simulator that receives the hydraulic pressure of the master cylinder during operation of the by-wire solenoid valve; anda fluid reservoir connected to a hydraulic pressure passage on a downstream side of the by-wire solenoid valve and on an upstream side of the ABS,wherein the ABS solenoid valve, the by-wire solenoid valve, the first hydraulic pressure sensor, the second hydraulic pressure sensors, the accumulator and the pump are integrated into one unit, and the stroke simulator is attached to the one unit as a separate body.

2. The brake system of a motorcycle according to claim 1, wherein the fluid reservoir is attached to the one unit as a separate body.

3. The brake system of a motorcycle according to claim 1, further comprising a front input circuit of a front wheel brake and a rear input circuit of a rear wheel brake that are independent of each other, wherein the by-wire-type brake system is provided to the front input circuit, and the hydraulic pressure of the rear input circuit is detected, and thus a front wheel braking force is increased.

4. The brake system of a motorcycle according to claim 2, further comprising a front input circuit of a front wheel brake and a rear input circuit of a rear wheel brake that are independent of each other, wherein the by-wire-type brake system is provided to the front input circuit, and the hydraulic pressure of the rear input circuit is detected, and thus a front wheel braking force is increased.

5. The brake system of a motorcycle according to claim 1, wherein the by-wire-type brake system is provided to each one of input circuits of the front and the rear wheel brakes.

6. The brake system of a motorcycle according to claim 2, wherein the by-wire-type brake system is provided to each one of input circuits of the front and the rear wheel brakes.

7. The brake system of a motorcycle according to claim 1, wherein the fluid reservoir is connected to the hydraulic pressure passage between the by-wire solenoid valve and the ABS.

8. The brake system of a motorcycle according to claim 2, wherein the fluid reservoir is connected to the hydraulic pressure passage between the by-wire solenoid valve and the ABS.

9. The brake system of a motorcycle according to claim 3, wherein the fluid reservoir is connected to the hydraulic pressure passage between the by-wire solenoid valve and the ABS.

10. The brake system of a motorcycle according to claim 5, wherein the fluid reservoir is connected to the hydraulic pressure passage between the by-wire solenoid valve and the ABS.

11. A vehicle brake system, comprising: a circulating-type ABS, said circulating-type ABS including: an ABS solenoid valve; andan accumulator that receives hydraulic pressure during operation of the ABS solenoid valve; anda pump that circulates brake fluid from the accumulator; anda by-wire-type brake system, said by-wire-type brake system including: a by-wire solenoid valve that blocks a hydraulic pressure passage between the master cylinder and the ABS;a master cylinder hydraulic pressure sensor;a caliper hydraulic pressure sensor; anda stroke simulator that receives hydraulic pressure during operation of the by-wire solenoid valve; andwherein the ABS solenoid valve, the by-wire solenoid valve, the master cylinder hydraulic pressure sensor, the caliper hydraulic pressure sensor, the accumulator and the pump are integrated into one unit, and the stroke simulator is attached to the one unit as a separate body.

12. The vehicle brake system according to claim 11, further comprising a fluid reservoir connected to a downstream side of the by-wire solenoid valve and an upstream side of the ABS, wherein the fluid reservoir is attached to the one unit as a separate body.

13. The vehicle brake system according to claim 11, further comprising a front input circuit of a front wheel brake and a rear input circuit of a rear wheel brake that are independent of each other, wherein the by-wire-type brake system is provided to the front input circuit, and the hydraulic pressure of the rear input circuit is detected, and thus a front wheel braking force is increased.

14. The vehicle brake system according to claim 12, further comprising a front input circuit of a front wheel brake and a rear input circuit of a rear wheel brake that are independent of each other, wherein the by-wire-type brake system is provided to the front input circuit, and the hydraulic pressure of the rear input circuit is detected, and thus a front wheel braking force is increased.

15. The vehicle brake system according to claim 11, wherein the by-wire-type brake system is provided to each one of input circuits of the front and the rear wheel brakes.

16. The vehicle brake system according to claim 12, wherein the by-wire-type brake system is provided to each one of input circuits of the front and the rear wheel brakes.

17. The vehicle brake system according to claim 11, wherein the fluid reservoir is connected to a hydraulic pressure passage between the by-wire solenoid valve and the ABS.

18. The vehicle brake system according to claim 12, wherein the fluid reservoir is connected to a hydraulic pressure passage between the by-wire solenoid valve and the ABS.

19. The vehicle brake system according to claim 13, wherein the fluid reservoir is connected to a hydraulic pressure passage between the by-wire solenoid valve and the ABS.

20. The vehicle brake system according to claim 15, wherein the fluid reservoir is connected to a hydraulic pressure passage between the by-wire solenoid valve and the ABS.