Irregularity-detecting method for variable valve-timing type...

Details Irregularity-detecting method for variable valve-timing type... Irregularity-detecting method for variable valve-timing type...

F - Mech Eng,Light,Heat,Weapons

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123/183, 123/186

F01L 1/34 (2006.01) F01L 1/26 (2006.01) F02D 41/22 (2006.01)

Patent

CA 1327152

ABSTRACT An irregularity-detecting method for a variable valve-timing type engine in which valve timing for at least each of intake valves or exhaust valves in the engine is changed over by a hydraulically operated changeover mechanism, said method comprising steps of: detecting by a hydraulic pressure detecting means an oil pressure in an oil supplying passage for supplying oil to the changeover mechanism; making a comparison between an open/close command or instruction given to a valve means to control oil supplied to the oil supplying passage and signals representing the oil pressure detected by said hydraulic pressure detecting means; and determining through said comparison an irregularity in the valve timing changeover.

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