Brake system and vehicle

Patent metadata

Field	Value
Publication number	US-2016280193-A1
Application number	US-201415033560-A
Country	US
Kind code	A1
Filing date	Oct 29, 2014
Priority date	Oct 31, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

A brake system includes a brake activator which reduces, when a slipping condition of a right front wheel is detected based on a signal which is detected by a right detector, both braking forces on the right front wheel and a left front wheel to a lower level than a level of a braking force which is obtained as a result of operation of an input member and which reduces, when a slipping condition of the left front wheel is detected based on a signal which is detected by a left detector, both braking forces on the left front wheel and the right front wheel to a lower level than a level of a braking force which is obtained as a result of operation of the input member.

First claim

1 - 11 . (canceled)

12 : A brake system for a vehicle, the brake system comprising:
a right front brake on a right front wheel of the vehicle to generate a braking force on the right front wheel; a left front brake on a left front wheel of the vehicle to generate a braking force on the left front wheel; an input that is operated to turn by a rider; a right front wheel slip detector that detects a slipping condition of the right front wheel; a left front wheel slip detector that detects a slipping condition of the left front wheel; and a brake activator that:
reduces the braking force on the right front wheel and the braking force on the left front wheel to a lower level than a level of a braking force which is obtained by an operation of the input by controlling both an operating condition of the right front brake on the right front wheel and an operating condition of the left front brake on the left front wheel based on a signal detected by the right front wheel slip detector at least while the vehicle is turning with the body frame leaning in a left-and-right direction of the vehicle and both the right front brake and the left front brake are in operation as a result of the operation of the input when the slipping condition of the right front wheel is detected based on the signal detected by the right front wheel slip detector; and
reduces the braking force on the left front wheel and the braking force on the right front wheel to a lower level than a level of a braking force which is obtained by an operation of the input by controlling both an operating condition of the left front brake on the left front wheel and an operating condition of the right front brake on the right front wheel based on a signal detected by the left front wheel slip detector when the slipping condition of the left front wheel is detected based on the signal detected by the left front wheel slip detector.

13 : The brake system according to claim 12 , wherein the brake activator:
reduces the braking force on the left front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the left front brake on the left front wheel according to a physical quantity in relation to the braking force on the right front wheel based on the signal detected by the right front wheel slip detector; and reduces the braking force on the right front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the right front brake on the right front wheel according to a physical quantity in relation to the braking force on the left front wheel based on the signal detected by the left front wheel slip detector.

14 : The brake system according to claim 13 , wherein the brake activator:
reduces the braking force on the left front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the left front brake on the left front wheel according to a physical quantity in relation to the operating condition of the right front brake based on the signal detected by the right front wheel slip detector; and reduces the braking force on the right front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the right front brake on the right front wheel according to a physical quantity in relation to the operating condition of the left front brake based on the signal detected by the left front wheel slip detector.

15 : The brake system according to claim 12 , wherein the brake activator reduces:
the braking force on the left front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the left front brake on the left front wheel according to a control quantity which controls the operating condition of the right front brake based on the signal detected by the right front wheel slip detector; and reduces the braking force on the right front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the right front brake on the right front wheel according to a control quantity which controls the operating condition of the left front brake based on the signal detected by the left front wheel slip detector.

16 : The brake system according to claim 12 , wherein
when the slipping condition of the right front wheel is detected based on the signal detected by the right front wheel slip detector, the brake activator firstly reduces the braking force on the right front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the right front brake on the right front wheel and thereafter reduces the braking force on the left front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the left front brake on the left front wheel based on the signal detected by the right front wheel slip detector; and when the slipping condition of the left front wheel is detected based on the signal detected by the left front wheel slip detector, the brake activator firstly reduces the braking force on the left front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the left front brake on the left front wheel and thereafter reduces the braking force on the right front wheel to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the right front brake on the right front wheel based on the signal detected by the left front wheel slip detector.

17 : The brake system according to claim 12 , wherein
when the slipping condition of the right front wheel is detected based on the signal detected by the right front wheel slip detector, the brake activator reduces the braking force on the right front wheel and the braking force on the left front wheel at the same time to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the right front brake on the right front wheel and controlling the operating condition of the left front brake on the left front wheel based on the signal detected by the right front wheel slip detector; and when the slipping condition of the left front wheel is detected based on the signal detected by the left front wheel slip detector, the brake activator reduces the braking force on the right front wheel and the braking force on the left front wheel at the same time to a lower level than a level of the braking force which is obtained as a result of the operation of the input by controlling the operating condition of the left front brake on the left front wheel and controlling the operating condition of the right front brake on the right front wheel based on the signal detected by the left front wheel slip detector.

18 : A vehicle comprising:
a body frame; a right front wheel and a left front wheel aligned in a left-and-right direction of the body frame when the vehicle is viewed from a front thereof with the body frame being in an upright state; a central rear wheel provided behind the right front wheel and the left front wheel

Assignees

• Yamaha Motor Co Ltd
• Advics Co Ltd

Inventors

• Seto Hiroaki
• OHASHI Kunihide
• Yamamura Takeshi
• Tsuji Yoshinori
• Takada Hideki
• Kajihara Kunio
• Terasaka Masato
• Hamamoto Yutaka

Classifications

• B62K5/10

  with means for inwardly inclining the vehicle body on bends · CPC title

• B62K5/05

  characterised by a single rear wheel · CPC title

• B60T8/17554 Primary

  specially adapted for enhancing stability around the vehicles longitudinal axle, i.e. roll-over prevention (road vehicle drive control systems for roll-over prevention otherwise than by controlling a particular sub-unit B60W30/04) · CPC title

• B62K5/08

  with steering devices acting on two or more wheels · CPC title

• B62K2005/001

  Suspension details for cycles with three or more main road wheels · CPC title