Adjusting system for crank angle sensor
First Claim
1. An adjusting system for internal combustion engines comprising:
- first means associated with an engine crankshaft for producing first and second pulse signals, said first signal being indicative of a predetermined crankshaft position for each engine cylinder and said second signal being indicative of rotation of the engine crankshaft through a predetermined unit angle;
second means applied with said first and second signals from said first means for adjusting said first signal to provide a third pulse signal; and
third means for measuring the difference between an actual value and a target value with respect to a desired timing, said actual value of the desired timing being variable corresponding to a change in a pulse phase of said third signal;
said adjustment of the first signal being done to eliminate said difference between the actual and target values.
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Accused Products
Abstract
An adjusting system for crank angle sensor signal comprises a crank angle sensor, a timing detector and an adjusting unit including an output control device. The crank angle sensor is associated with an engine crankshaft and produces first and second signals. The first signal is indicative of a predetermined crankshaft position for each engine cylinder and the second signal is indicative of rotation of the engine crankshaft through a unit angle. These signals are used for controlling fuel injection timing or spark timing. The timing detector measures the difference between an actual value and a target value with respect to a desired timing, which timing is, for example, fuel injection timing, spark timing, or a predetermined crankshaft position for each engine cylinder. The output control device is provided at a safe place away from various engine rotational parts and is manually operable to change its output as a correction value. The adjusting unit is adapted to adjust the first signal in response to the output of the output control device to make the actual value coincide with the target value so that the first signal is electrically adjusted safely and efficiently without moving the crank angle sensor itself to attain optimal fuel injection timing or spark timing.
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Citations
19 Claims
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1. An adjusting system for internal combustion engines comprising:
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first means associated with an engine crankshaft for producing first and second pulse signals, said first signal being indicative of a predetermined crankshaft position for each engine cylinder and said second signal being indicative of rotation of the engine crankshaft through a predetermined unit angle; second means applied with said first and second signals from said first means for adjusting said first signal to provide a third pulse signal; and third means for measuring the difference between an actual value and a target value with respect to a desired timing, said actual value of the desired timing being variable corresponding to a change in a pulse phase of said third signal; said adjustment of the first signal being done to eliminate said difference between the actual and target values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An adjusting system for an internal combustion engine having a crankshaft, said adjusting means comprising:
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a crank angle sensor associated with said crankshaft for producing a first pulse signal indicative of a predetermined crankshaft position; means responsive to said first pulse signal for producing a second pulse signal having a controlled phase relation with respect to said first pulse signal; means associated with said second pulse signal producing means for adjusting the phase relation of said second pulse signal with respect to said first pulse signal to vary the timing of said second pulse signal; and means responsive to said second pulse signal for controlling the timing of an engine operation; whereas the timing of said engine operation may be controllably adjusted to a target value while the timing of said first pulse signal remains constant. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification