Engine starting method
AssigneeFord Global Technologies, LLC
InventorsPaul Charles Mingo, Xiaoying Zhang
Life of this patent
Estimating the term…
Abstract
A method for determining engine position during engine starting is described wherein cylinder identification is determined based on either the absence or presence of a cylinder identification signal. The approach is used when it is determined that engine speed is large enough so that the cylinder identification signal can be recognized.
Claims19
A method for determining engine position based on a signal coupled to the engine, the engine having a camshaft and a crankshaft, the method comprising:
- calculating engine position based on an absence of the signal when said signal is absent for a predetermined amount of engine rotation;
- and
- calculating engine position based on the presence of the signal otherwise.
A method for determining engine position based on a signal coupled to the engine, the engine having a camshaft and a crankshaft, the method comprising:
- calculating engine position based on an absence of the signal when said signal is absent for a predetermined amount of engine rotation;
- calculating engine position based on the presence of the signal otherwise;
- and
- after said detecting, beginning sequential fuel injection.
A system comprising:
- an engine having a camshaft and a crankshaft;
- a camshaft sensor for sensing rotation of said camshaft;
- a crankshaft senor for sensing rotation of said crankshaft;
- and
- a controller receiving a camshaft sensor signal and a crankshaft sensor signal,
- said controller calculating engine position based on said crankshaft sensor signal and an absence of said camshaft sensor signal when said camshaft sensor signal is absent for a predetermined amount of crankshaft rotation, and
- calculating engine position based on said crankshaft sensor signal and said camshaft sensor signal otherwise.
A method for determining engine position based on a signal coupled to the engine, the engine having a camshaft and a crankshaft, the method comprising:
- providing an indication that the signal is receivable;
- and
- in response to said indication, calculating engine position based on an absence of the signal when the signal is absent for a predetermined amount of engine rotation.
A method for determining engine position based on a signal coupled to the engine, the engine having a camshaft and a crankshaft, the method comprising:
- providing an indication that the signal is receivable;
- in response to said indication, calculating engine position based on an absence of the signal when the signal is absent for a predetermined amount of engine rotation;
- and
- calculating engine position based on a presence of the signal when the signal is present before said predetermined amount of engine rotation.
Dependencies are inferred from the claim text.