Patent ID: 9014937
Filing Date: 2015-04-21
Classification: F16H

Abstract:
1. A front wheel differential lock control system for a straddle-ride type four-wheel vehicle, comprising: a differential mechanism for producing a rotational difference between left and right front wheels driven by an engine; an engine rotation number detector, said engine rotation number detector serving to detect an engine rotation number of the engine; a device, disposed in a drive force transmission path between the engine and the differential mechanism, to prohibit transmission of drive force to said differential mechanism when the detected engine rotation number is below a predetermined value and to transmit drive force to the differential mechanism when the detected engine rotation number is equal to or greater than the predetermined value; a diff-lock actuator for switching the differential mechanism into a differential lock state so as not to produce the rotational difference between the front wheels in response to operation of an operation switch; and a control section including a central processing unit for drivingly controlling at least the diff-lock actuator, and wherein if the detected engine rotation number is below said predetermined value in which said device does not transmit drive force to said differential mechanism, the control section permits actuation of the diff-lock actuator upon detection of the operation of the operation switch, and wherein if the detected engine rotation number is equal to or above the predetermined value in which said device transits drive force to said differential mechanism, actuation of the diff-lock actuator is prevented and the control section controls engine output until the switching of the differential mechanism to the differential lock state is permitted.