Patent ID: 6595044
Filing Date: 2003-07-22
Classification: F02D,G01M

Abstract:
A stroke discriminator for an internal combustion engine comprisinga rotor operatively associated with a crankshaft of a single cylinder internal combustion engine and provided with a plurality of detectable elements thereon, detector means for transmitting a detection signal every time said detectable elements pass the detector means, and discriminator means for determining a stroke of the internal combustion engine in accordance with a difference in time between a transmission of a previous detection signal and transmission of a current detection signal, wherein an outer periphery of said rotor is provided with a detectable-element formed region having said plurality of detectable elements formed thereon at equal angle intervals in a direction of rotation and a non-formed region having no detectable elements formed thereon, and said non-formed region has an angle interval greater than said equal angle interval, and said non-formed region is provided on said rotor so as to pass near said detector means when a piston of said internal combustion engine travels from a top dead center position to a bottom dead center position.