Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1985-04-15
1987-10-06
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Idle speed control
123436, 36443107, F02M 307
Patent
active
046975616
ABSTRACT:
Techniques are provided for determining on-line measures of both the average torque produced by an internal combustion engine, and the torque fluctuations (relative combustion efficiencies) of the cylinders of a multiple cylinder internal combustion engine. These techniques employ knowledge of crankshaft speed at the points of fastest and slowest crankshaft speed. Also, an engine-performance monitor is proposed for determining the above noted quantities on-line. The engine-performance monitor permits monitoring of engine performance to test control strategies for both engine fuel distribution systems and ignition systems. The techniques and engine-performance monitor can also be incorporated into a feedback system for controlling the performances of the various individual cylinders of a multiple cylinder internal combustion engine. Engine crankshaft speed is the basis for the calculations required. An on-line determination of engine torque can be incorporated into an engine control system or used for diagnostic purposes. One control system makes use of a measure of the cylinder-by-cylinder and combustion event-by-combustion event contributions to engine torque to optimize ignition or injection timing on a cylinder-by-cylinder basis.
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Argenbright Tony M.
Purdue Research Foundation
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