Claims
- 1. A system for equalizing fuel-injection quantities among cylinders of an internal combustion engine of a vehicle, comprising:
- a fuel metering device for injecting a quantity of fuel into each cylinder of the engine;
- a controller coupled to the fuel metering device;
- the controller determining an angular acceleration of at least one of a crankshaft and camshaft of the vehicle during a combustion process at each cylinder;
- the controller comparing the determined angular accelerations to detect a deviation between at least two determined angular accelerations; and
- the controller controlling the fuel metering device to alter the quantity of fuel injected into one or more of the cylinders of the engine in order to compensate for a deviation, if such a deviation is detected.
- 2. The system as recited in claim 1, wherein the controller determines a rotational speed at each of a first and second segment of a segmented wheel, determines a difference between the rotational speeds, determines a run-through time of a third and fourth segment of the segmented wheel, and divides the difference by the run-through time to determine the angular accelerations.
- 3. The system as recited in claim 1, wherein the controller further determines an average value of the angular accelerations.
- 4. The system as recited in claim 3, wherein the average value is determined as a sliding average over all of the cylinders of the engine.
- 5. The system as recited in claim 3, wherein the controller further compares each of the angular accelerations to the average value to determine a deviating angular acceleration, and controls the fuel metering device to inject an additional fuel quantity into the cylinder corresponding to the deviating angular acceleration during a subsequent fuel injection process.
- 6. The system as recited in claim 5, wherein the subsequent fuel injection process is the next fuel injection process.
- 7. The system as recited in claim 5, wherein the additional fuel quantity is proportional to a difference between the deviating angular acceleration and the average value.
- 8. The system as recited in claim 5, wherein the controller continuously compares the angular accelerations to the average value, and controls the fuel metering device to inject a plurality of additional fuel quantities.
- 9. The system as recited in claim 8, wherein the controller continuously adds the additional fuel quantities to form a cumulative value for each cylinder.
- 10. The system as recited in claim 9, wherein the cumulative value is equal to zero.
- 11. A method of equalizing fuel-injection quantities among cylinders of an internal combustion engine of a vehicle, comprising the steps of:
- determining an angular acceleration of at least one of a crankshaft and camshaft of the vehicle during a combustion process at each cylinder;
- comparing the determined angular accelerations to detect a deviation between at least two determined angular accelerations; and
- controlling a fuel metering device to alter the quantity of fuel injected by the fuel metering device into one or more of the cylinders of the engine in order to compensate for a deviation, if such a deviation is detected.
- 12. The method as recited in claim 11, wherein the method further comprises the steps of:
- determining a rotational speed at each of a first and second segment of a segmented wheel;
- determining a difference between the rotational speeds;
- determining a run-through time of a third and fourth segment of the segmented wheel; and
- dividing the difference by the run-through time to determine the angular accelerations.
- 13. The method as recited in claim 11, wherein the method further comprises the step of determining an average value of the angular accelerations.
- 14. The method as recited in claim 13, wherein the average value is determined as a sliding average over all of the cylinders of the engine.
- 15. The method as recited in claim 13, wherein the method further comprises the steps of:
- comparing each of the angular accelerations to the average value to determine a deviating angular acceleration; and
- injecting an additional fuel quantity into the cylinder corresponding to the deviating angular acceleration during a subsequent fuel injection process.
- 16. The method as recited in claim 15, wherein the subsequent fuel injection process is the next fuel injection process.
- 17. The method as recited in claim 15, wherein the additional fuel quantity is proportional to a difference between the deviating angular acceleration and the average value.
- 18. The method as recited in claim 15, wherein the angular accelerations are continuously compared to the average value, and a plurality of additional fuel quantities are injected.
- 19. The method as recited in claim 18, wherein the method further comprises the step of continuously adding the additional fuel quantities to form a cumulative value for each cylinder.
- 20. The method as recited in claim 19, wherein the cumulative value is equal to zero.
Priority Claims (1)
Number |
Date |
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4122139 |
Jul 1991 |
DEX |
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CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of pending U.S. application Ser. No. 07/893,115, filed on Jun. 3, 1992.
US Referenced Citations (6)
Continuation in Parts (1)
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893115 |
Jun 1992 |
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