CONTROL METHOD FOR POWER STEERING DEVICE

PURPOSE:To have light sense steering as well as facilitate identification of the running conditions by reading the number-of-revolution characteristic of an oil pump optimum for the current running conditions, controlling thereupon the revolving speed of the oil pump, and also providing identification and display of the characteristic selected. CONSTITUTION:While a car is running, a car speed signal given by a speed sensor 5a and a steering signal given by a steering sensor 6 are taken in a control part 3, and if it is judged to be during running, the oil pump number-of- revolutions characteristic optimum for the current running conditions is read from the memory. As the running conditions are used car speed and the transverse acceleration as product of it and the amount of steering. On the basis of the oil pump number-of-revolutions characteristic thus read, the oil pump number-of-revolutions signal for the current car speed under running is read to control the motor 2 for driving the oil pump 2a. The oil pump number-of-revolutions characteristic selected is displayed on a display installed in the neighborhood of the instrument panel.