Patent ID: 6289882
Filing Date: 2001-09-18
Classification: F02B

Abstract:
A method of controlling a rotary blower of the backflow or compression type having an input, a housing defining a blower chamber, and a pair of blower rotors disposed in said blower chamber and adapted to be driven by said input, and a wet clutch disposed in series driving relationship between said input and said blower rotors, said wet clutch including spring means biasing said wet clutch toward one of an engaged and a disengaged condition, and a fluid pressure actuated piston having a pressure chamber biasing said wet clutch toward the other of said engaged and said disengaged conditions; said method of controlling characterized by:(a) providing an electrohydraulic valve means operable to communicate said pressure chamber selectively to a source of high pressure and a source of low pressure;(b) generating a command signal operable to bias said electrohydraulic valve means toward a position operable to communicate said pressure chamber to said source of whichever of said high pressure and said low pressure corresponds to said engaged condition;(c) sensing a throttle position representative of change in commanded throttle position for the vehicle engine;(d) modifying said command signal in response to said throttle position whereby a change between said engaged and said disengaged conditions will occur more rapidly for a more rapid change in commanded throttle position.