Patent Number:
6,332,352
Title:
Engine torque-detecting method and an apparatus therefor
Abstract:
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.
Inventors:
Sano; Taketoshi (Iwata, JP)
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha
International Classification:
G01L 3/24 (20060101); G01M 15/08 (20060101); G01L 3/00 (20060101); G01M 15/04 (20060101); G01M 015/00 ()
Expiration Date:
12/25/2018