Patent ID: 7370635
Filing Date: 2008-05-13
Classification: F02D

Abstract:
1. A control system for controlling at least a portion of a hydraulic system having first and second functional elements each controllable by a control signal, the control system comprising: a sensor arrangement operatively connected to the hydraulic system and being configured to generate at least one signal indicative of an operating condition of the hydraulic system; a control module operatively connected to the first and second functional elements and the sensor arrangement; the control module being operable to produce a first control signal having a first waveform and a second control signal having a second waveform; the control module being operable, in a first mode, to transmit the first and second waveforms to the first and second functional elements, respectively, with a first predetermined offset; the control module being operable, in a second mode, to transmit the first and second waveforms to the first and second functional elements, respectively, with a second offset relatively longer than the first offset; the control module being operable to operate according to the first mode and thereafter to begin operating according to the second mode in response to at least one of (i) a first at feast one signal generated by the sensor arrangement and (ii) the control module operating according to the first mode for a predetermined length of time.