초록 ▼

A method and apparatus for measuring the instantaneous torque of an engine by measuring the change in pressure in the combustion chamber at two crank angles. The crank angles are chosen to approximate the time when the change in pressure is the greatest and when the pressure is the greatest and the

A method and apparatus for measuring the instantaneous torque of an engine by measuring the change in pressure in the combustion chamber at two crank angles. The crank angles are chosen to approximate the time when the change in pressure is the greatest and when the pressure is the greatest and the change in pressure is zero. These crank angles may be either determined by measuring the values or by approximating the crank angles at which the values will exist. In some instances, the torque is measured by summing the change in pressures during the time interval and in other methods the torque is measured by determining the pressure differences at the two crank angles.

대표청구항 ▼

[ What is claimed:] [1.]1. A method for measuring output torque of an internal combustion engine during a single cycle of operation wherein the engine comprises a combustion chamber and an output shaft driven by combustion occurring in the combustion chamber, said method comprising the steps of taki

[ What is claimed:] [1.]1. A method for measuring output torque of an internal combustion engine during a single cycle of operation wherein the engine comprises a combustion chamber and an output shaft driven by combustion occurring in the combustion chamber, said method comprising the steps of taking a specific number of measurements of instantaneous pressure conditions directly in the combustion chamber only at spaced time intervals between two output shaft angles during only a portion of a complete cycle of operation and for less than the complete cycle and computing torque of the engine for the complete cycle from such specific number of separate instantaneous measurements.