Rear wheel neutral lock device of front and rear wheel steering device

Abstract

Abstract PURPOSE:To lock a rear wheel in a neutral position independently of a control route when a rear wheel steering route is abnormal by arranging a neutral restoration means for restoring the neutral position as well as a deviation detection means for detecting a deviation of the rear wheel steering means from the neutral position. CONSTITUTION:A neutral restoration means 20 for restoring a rear wheel to the neutral position is provided with a restoration cylinder 60 which drives a tie-rod 38r in a direction opposite to a side on which lock actuation switches 58R and 58L of a neutral lock device 18 have been actuated. Two routes of input signals detected with a front and a rear wheel steering angle sensors 28 and 44 are inputted to both a main computer 72 and a subcomputer 74 and the operated results are outputted to both a servomotor 42 of a rear wheel steering device 16 and a drive amplifier 56 of a neutral lock device 18. When both computers 72 and 74 are discriminated to be out of order, normal front and rear wheel steering is inhibited and restoration and lock to the neutral position as well as issuing warning are performed.

Inventors

• 👤 Norio Komoda
• 👤 薦田　紀雄

Bibliographic Details