Electronic engine control with reduced sensor set

Details Electronic engine control with reduced sensor set Electronic engine control with reduced sensor set

2005-10-18

2005-10-18

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Simulating operating condition

Marine

Reexamination Certificate

active

06955081

ABSTRACT:
An engine control apparatus is disclosed for determining crankshaft position, engine phase, engine loading, and intake air mass of an internal combustion engine (10) through monitoring intake air pressure fluctuations (120). The opening of the intake valve (44) is mechanically linked to the crankshaft position of an engine. When the intake valve (44) opens it creates air pressure fluctuations in the air induction system (14) of the engine (10). The control apparatus is configured to determine intake air pressure fluctuations indicative of an intake air event (100to110) and thus a particular crankshaft position, and their corresponding period of the engine cycle. The controller then uses this information to determine crankshaft speed and position for the purpose of fuel injection and ignition timing of the internal combustion engine. Engine phase is also determined on four-stroke engines. Intake air pressure is used to determine intake air mass and loading of the engine. This combination results in a single sensor used in a system to determine intake air mass, engine loading, injected fuel mass, and to determine timing for fueling and ignition events. The engine may also include a crankshaft position sensor in combination with monitoring intake air pressure over time to increase resolution in the determination of crankshaft position.

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