Apparatus and method for detecting abnormalities of a linear...

Details Apparatus and method for detecting abnormalities of a linear... Apparatus and method for detecting abnormalities of a linear...

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 61/02 (2006.01) F16H 61/12 (2006.01)

Patent

CA 2380204

An apparatus includes a linear solenoid valve regulating an oil pressure supplied to a clutch, a hydraulic switch being switched on and off upon receipt of a switching oil pressure, and a control unit controlling the actuation of the solenoid valve. A pressure-increased side signal oil pressure is detected which results when the hydraulic switch is switched on and off while a control signal is sent to the solenoid valve to increase a control oil pressure from a predetermined lower pressure to a predetermined higher pressure, and a pressure-decreased side signal oil pressure is detected which results when the hydraulic switch is switched on and off while the control signal is sent to decrease the control oil pressure from the predetermined higher pressure to the predetermined lower pressure. When a difference between these signal oil pressures exceeds an abnormalities determination value, it is determined that the solenoid valve is abnormal.

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