Internal combustion engine and method for controlling internal combustion engine speed
First Claim
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1. A method for controlling a speed of an internal combustion engine, the method comprising:
- shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine;
providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine, wherein providing the electrical load comprises exciting a heating device coupled to the alternator to heat a portion of an exhaust system configured to receive exhaust gas from the cylinder; and
controlling the electrical load such that the heating device maintains an operating temperature of at least one exhaust system component while the speed of the internal combustion engine is reduced.
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Abstract
In one exemplary embodiment of the invention a method for controlling a speed of an internal combustion engine includes shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine. The method also includes providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine.
10 Citations
19 Claims
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1. A method for controlling a speed of an internal combustion engine, the method comprising:
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shutting off fuel flow into a cylinder to reduce the speed of the internal combustion engine; providing an electrical load to an alternator of the internal combustion engine, further reducing the speed of the internal combustion engine, wherein providing the electrical load comprises exciting a heating device coupled to the alternator to heat a portion of an exhaust system configured to receive exhaust gas from the cylinder; and controlling the electrical load such that the heating device maintains an operating temperature of at least one exhaust system component while the speed of the internal combustion engine is reduced. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An internal combustion engine, comprising:
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an exhaust system configured to receive exhaust gas from the internal combustion engine; a heating device configured to heat at least one exhaust system;
component of the exhaust system; anda control module that selectively controls an electrical load provided by the heating device to an alternator of the internal combustion engine to reduce a speed of the internal combustion engine and maintains an operating temperature of the at least one exhaust system component while the speed of the internal combustion engine is reduced. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for controlling an internal combustion engine, the method comprising:
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determining a reduction of the speed of the engine is needed; and exciting a heating device coupled to an alternator of the internal combustion engine, thereby increasing a parasitic load on the engine causing a reduced speed for the internal combustion engine, wherein said exciting a heating device is performed so as to heat a portion of an exhaust system configured to receive exhaust gas from the cylinder; and controlling an electrical current supplied to the heating device such that the heating device maintains an operating temperature of at least one exhaust system component while the speed of the internal combustion engine is reduced. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification