Patent ID: 6067847
Filing Date: 2000-05-30
Classification: G01M

Abstract:
A running quality evaluator for quantifying the quality of operation of an internal combustion engine, the evaluator comprising:an engine speed circuit connectable to the internal combustion engine for conditioning a series of trigger pulses from the engine, wherein the frequency of the trigger pulses correspond to the engine speed;an integrating circuit coupled to the engine speed circuit for converting the conditioned trigger pulses into an engine speed signal, wherein the engine speed signal increases as the frequency of trigger pulses increases;a differentiating circuit coupled to the integrating circuit, the differentiating circuit converting the engine speed signal into an engine quality signal, wherein the engine quality signal increases as the rate of change of the engine speed signal increases; andan output circuit coupled to the differentiating circuit for converting the engine quality signal into an output signal representative of the quality of operation of the engine, wherein the output signal increases as the engine quality signal increases.