Patent ID: 6094617
Filing Date: 2000-07-25
Classification: F02D,G01M,Y02T

Abstract:
A system for monitoring engine performance of a work machine wherein the work machine includes an engine coupled to a torque converter, said system comprising:a first sensor for determining engine speed;a second sensor for determining the throttle position of the engine;a third sensor for determining the output speed of the torque converter;an electronic controller coupled with said first, second and third sensors for receiving signals therefrom, said controller being operable to receive a signal from said first sensor indicative of the speed of the engine, a signal from said second sensor indicative of the throttle position of the engine, and a signal from said third sensor indicative of the output speed of the torque converter;monitoring means for producing a signal indicative of low engine performance, said monitoring means being coupled to said electronic controller for receiving signals therefrom; andmemory means coupled to said controller and having stored therein a plurality of different engine speed and converter output speed correlations, each correlation representing the engine speed and converter output speed at a particular throttle position;said controller outputting a signal to said monitoring means indicative of low engine power performance when said controller receives a signal from said first sensor indicative of the speed of the engine, a signal from said second sensor indicative of the throttle position of the engine, and a signal from said third sensor indicative of the converter output speed being less than a predetermined converter output speed, said predetermined converter output speed being determined from the engine speed and converter output speed correlation selected by said controller based upon signals received from said first and second sensors.