초록 ▼

A dynamic engine power test method comprises operating the engine at a low speed, accelerating the engine at full throttle to a predetermined high speed, such as high idle, without absorbing or dissipating power therefrom, measuring the engine speed and elapsed time to determine the angular accelera

A dynamic engine power test method comprises operating the engine at a low speed, accelerating the engine at full throttle to a predetermined high speed, such as high idle, without absorbing or dissipating power therefrom, measuring the engine speed and elapsed time to determine the angular acceleration at specific speeds in the operating range of the engine or during one or more relatively small discrete speed intervals or windows preferably corresponding to peak torque speed, an intermediate point, rated speed, and a speed between rated speed and high idle. The torque output of the engine may be calculated manually or preferably automatically for each speed interval based on the equation T=Iaa

대표청구항 ▼

A method of determining the acceptability for sale of one of a series of mass produced internal combustion engines, engines of said series having a predetermined average rotational inertial, I, comprising: mounting a newly manufactured engine of said series on a test facility having means for measur

A method of determining the acceptability for sale of one of a series of mass produced internal combustion engines, engines of said series having a predetermined average rotational inertial, I, comprising: mounting a newly manufactured engine of said series on a test facility having means for measuring the speed of rotation of said engine and being characterized by the lack of a calibrated power absorbing and measuring device; starting said engine and performing a gross evaluation of its operation; operating said engine at a low speed; accelerating said engine at wide open throttle to a high speed without dissipating power therefrom; measuring the speed of rotation of said engine during said accelerating step; determining during said accelerating step the mean angular acceleration of engine within at least two small discrete speed intervals corresponding respectively to at least two test speeds above said low speed and below said high speed; computing engine torque at said test speeds according to the equation T=Iaa