Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1980-09-02
1982-07-13
Myracle, Jerry W.
Internal-combustion engines
Charge forming device
Fuel injection system
73116, 123414, G01M 1500
Patent
active
043389031
ABSTRACT:
An electronic cylinder identification system is disclosed for identifying the occurrence of a predetermined cycle position for a reference cylinder and synchronizing fuel injection for a multi-cylinder engine in accordance thereto. A four cylinder engine rotates a rotary body having two 90 degree spaced peripheral projections and two stationary reluctance sensors are positioned 180 degrees apart about the body and sense the passage of the rotary body projections. Logic circuitry receives signals from the two sensors and determines which sensor is currently providing a logic pulse indicating the passage of a projection and which sensor previously provided such a pulse. The logic circuitry utilizes this information to identify the rotational position of the rotary body by differentiating between occurring identical sensor pulses based upon which sensor previously produced a pulse. Preferably the rotary body is rotated by the engine camshaft which is rotated at one half of the speed of the engine crankshaft which drives the pistons in the engine cylinders through their full engine cycle in two crankshaft revolutions. Fuel injection apparatus is operated in accordance with the identified rotational position of the camshaft.
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Gillman James W.
Melamed Phillip H.
Motorola Inc.
Myracle Jerry W.
Pristelski James S.
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