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US 7,069,140 B2Granted
Engine operation without cam sensor
AssigneeGeneral Electric Company
InventorsAhmed Esa Sheikh, Bo Nilson Almstedt, Mikael Thorell
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AssigneeGeneral Electric Company
InventorsAhmed Esa Sheikh, Bo Nilson Almstedt, Mikael Thorell
Estimating the term…
Disclosed herein are methods of cranking and/or operating an engine that eliminates the need for use of a cam sensor. The methods implemented with internal combustion engine comprising a plurality of cylinders whose firing sequence occurs over two revolutions of a crankshaft with a first set of cylinders comprising a power stroke during the first crankshaft revolution and a second set of cylinders comprising the power stroke of a second crankshaft revolution. The methods involve manipulating fuel injection command signals to occur out of their proper sequence, monitoring and engine indicator responsive to firing and non-firing of cylinders, and identifying correct engine phase based on fluctuations in the engine indicator. Also disclosed herein are software product embodiments comprising program code modules that cause a engine control unit to manipulate the generation of fuel injection command signals to take place outside their correct sequence.
A method of determining correct engine phase of an internal combustion engine without the need for a cam sensor, wherein said internal combustion engine comprises a first set of cylinders whose power stroke occurs during a first revolution of said crankshaft, and a second set of cylinders whose power stroke occurs during a second revolution of said crankshaft, and an engine controller unit that receives a signal stream responsive to rotation of said crankshaft, said method comprising:
A method of determining correct engine phase of an internal combustion engine without the need for a cam sensor, wherein said internal combustion engine comprises a first set of cylinders whose power stroke occurs during a first revolution of said crankshaft, and a second set of cylinders whose power stroke occurs during a second revolution of said crankshaft, and an engine controller unit that receives a signal stream responsive to rotation of said crankshaft, said method comprising:
A method of determining correct engine phase of an internal combustion engine without the need for a cam sensor, wherein said internal combustion engine comprises a first set of cylinders whose power stroke occurs during a first revolution of said crankshaft, and a second set of cylinders whose power stroke occurs during a second revolution of said crankshaft, and an engine controller unit that receives a signal stream responsive to rotation of said crankshaft, said method comprising:
A computer program product for use within locomotive engines, said product comprising:
Dependencies are inferred from the claim text.