TWO-WHEELED MOTOR VEHICLE BRAKE CONTROL METHOD AND BRAKE CONTROL SYSTEM

• US 20090055066A1
• Filed: 02/08/2006
• Published: 02/26/2009
• Est. Priority Date: 02/08/2006
• Status: Active Grant

• Current Assignee: Bosch Corporation (Robert Bosch GmbH)
• Original Assignee: Bosch Corporation (Robert Bosch GmbH)
• Inventors: Kanno, Manabu, Ono, Shunsaku, Ogawa, Takahiro, Westerfeld, Helge
• Granted Patent: US 8,185,286 B2
• Time in Patent Office: Days
• US Class Current: 701/70
• CPC Class Codes: B60T 2240/06 Wheel load; Wheel lift
• CPC Class Codes: B60T 8/1706 for single-track vehicles, e.g. motorcycles
• CPC Class Codes: B60T 8/1766 Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
• 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: B60T 8/5006 Pressure reapplication by pulsing of valves B60T8/5012, B60T8/5018, B60T8/505, B60T8/5056 take precedence

Abstract

To reliably prevent re-lifting of a rear wheel immediately after landing of the rear wheel.

When it is determined that output of a detection signal corresponding to detection of lifting of a rear wheel has ended (S102), brake pressure—and specifically a pressure increase gradient of a wheel cylinder pressure of a front wheel—is reduced, and the pressure increase gradient that has been reduced is maintained until it is determined that vehicle body deceleration has fallen below a predetermined value K1 (S108, S110), whereby re-lifting of the rear wheel caused by an increase in brake pressure at a high pressure increase gradient after landing of the rear wheel can be reliably prevented.

Claims

1. A two-wheeled motor vehicle brake control method comprising reducing a pressure increase gradient of a wheel cylinder pressure of a front wheel immediately after lifting of a rear wheel has been detected.

2. The two-wheeled motor vehicle brake control method of claim 1, wherein reduction of the pressure increase gradient starts after landing of the rear wheel.

3. The two-wheeled motor vehicle brake control method of claim 2, wherein the pressure increase gradient that has been reduced is maintained until it is determined that vehicle body deceleration has fallen below a predetermined value.

4. A two-wheeled motor vehicle brake control method comprising reducing a pressure increase gradient of a wheel cylinder pressure of a front wheel when it is determined that vehicle body deceleration has exceeded a first predetermined value.

5. The two-wheeled motor vehicle brake control method of claim 4, wherein reduction of the pressure increase gradient starts after landing of a rear wheel.

6. The two-wheeled motor vehicle brake control method of claim 5, wherein the pressure increase gradient that has been reduced is maintained until it is deterred that vehicle body deceleration has fallen below a second predetermined value.

7. A two-wheeled motor vehicle brake control system configured to be capable of transmitting oil pressure arising in a front brake master cylinder in response to operation of a first brake operator to a front wheel cylinder via an oil pressure system, capable of transmitting oil pressure arising in a rear brake master cylinder in response to operation of a second brake operator to a rear wheel cylinder via an oil pressure system, and capable of discharging brake fluid of the front wheel cylinder to a front reservoir as desired,

wherein the brake control system is configured to determine whether or not output of a detection signal that is generated by detection of lifting of a rear wheel has ended and, when it is determined that output of the detection signal has ended, reduce a pressure increase gradient of a wheel cylinder pressure of a front wheel.

8. The two-wheeled moor vehicle brake control system of claim 7, wherein the brake control system is configured to determine whether or not vehicle body deceleration has fallen below a predetermined value after reduction of the pressure increase gradient has been performed and maintain the pressure increase gradient that has been reduced until it is determined that vehicle body deceleration has fallen below the predetermined value.

9. A two-wheeled motor vehicle brake control system configured to be capable of transmitting oil pressure arising in a front brake master cylinder in response to operation of a first brake operator to a front wheel cylinder via an oil pressure system, capable of transmitting oil pressure arising in a rear brake master cylinder in response to operation of a second brake operator to a rear wheel cylinder via an oil pressure system, and capable of discharging brake fluid of the front wheel cylinder to a front reservoir as desired,

wherein the brake control system is configured to reduce a pressure increase gradient of a wheel cylinder pressure of a front wheel when it is determined that vehicle body deceleration has exceeded a first predetermined value.

10. The two-wheeled motor vehicle brake control system of claim 9, wherein the brake control system is configured to determine whether or not vehicle body deceleration has fallen below a second predetermined value after reduction of the pressure increase gradient has been performed and maintain the pressure increase gradient that has been reduced until it is determined that vehicle body deceleration has fallen below the second predetermined value.