Patent ID: 9733643
Date: 2017-08-15
CPC Classifications: B62D,G05D

Claim:
1. A steering interrupt system for a vehicle, which vehicle includes steerable wheels, a hydraulic steering system with a pressurized fluid source, a steering directional control valve connected to the pressurized fluid source, a steering wheel connected to the steering directional control valve, a steering actuator selectively connected to the pressurized fluid source via the steering directional control valve, and an automatic steering system automatically controlling the steering actuator in an automatic steering mode, the steering interrupt system comprising: a load sensor connected to the steering directional control valve; and an interrupt valve connected to the steering directional control valve and the load sensor, the interrupt valve configured to switch from a first state in the automatic steering mode to a second state in an interrupt mode and block pressurized fluid flow from the automatic steering system to the steering actuator based on a fluid pressure load sensed by the load sensor from turning of the steering wheel by an operator, wherein during the interrupt mode: the steering directional control valve provides pressurized hydraulic fluid to the steering actuator and to control the steerable wheels in proportion to movement of the steering wheel by the operator; and the interrupt valve is configured to switch from the second state during the interrupt mode back to the first state in the automatic steering mode and unblock the pressurized fluid flow to the steering actuator based on the fluid pressure load sensed by the load sensor indicating the steering wheel is released by the operator.