Modification of engine control signal timing by emulation of engine position sensors
First Claim
1. A method of advancing or retarding an engine position signal in an IC engine comprising:
- using at least one controller,determining an engine position signal pattern using engine position signals received from an engine position sensor, the determined pattern including at least one discontinuity and being sufficiently developed to determine engine speed and position, thenemulating the engine position signal pattern, including the discontinuity, in a time-shifted manner, andcontrolling an engine component based at least in part on the emulated engine position signal pattern.
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Accused Products
Abstract
The timing of a controlled event is advanced or retarded in an IC engine by emulating the engine speed and position signal pattern prior to transmission of that signal pattern to an output such as a fuel injector. In a multi-controller engine in which a second controller is controlled at least in part by signals delivered by first controller, the signal preferably is emulated in the first controller prior to transmission to the second engine controller in order to allow the shifting of a timing of a controlled event without direct data transfer from the second controller to the first controller. The technique is particularly well-suited for controlling diesel fuel injection in a dual fuel or other multi-fuel engine. In this case, the first controller must be a dual fuel controller and the second controller may be a diesel controller.
32 Citations
17 Claims
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1. A method of advancing or retarding an engine position signal in an IC engine comprising:
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using at least one controller, determining an engine position signal pattern using engine position signals received from an engine position sensor, the determined pattern including at least one discontinuity and being sufficiently developed to determine engine speed and position, then emulating the engine position signal pattern, including the discontinuity, in a time-shifted manner, and controlling an engine component based at least in part on the emulated engine position signal pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of advancing or retarding an engine position signal in an IC engine comprising:
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transmitting engine position signals from an encoder wheel-based engine position sensor to a first controller, the encoder wheel having a plurality of evenly-spaced markers having at least one discontinuity therein; using the first controller, determining an engine position signal pattern based on the signals received from the engine position sensor, the determined pattern being sufficiently developed to determine engine speed and position;
thenusing the first controller, emulating the determined engine position signal pattern in a time-shifted manner to produce an emulated engine position signal pattern, transmitting the emulated engine position signal pattern to a second controller; and using the second controller, controlling at least one liquid fuel injector based at least in part on the emulated engine position signal pattern. - View Dependent Claims (15)
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16. A multi-fuel engine comprising:
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(A) at least one gaseous fuel supply device; (B) at least one liquid fuel injector; (C) an engine position sensor; (D) a dual fuel controller coupled to the gaseous fuel device and to the gaseous fuel injector, wherein the dual fuel controller receives engine position signals from the engine position sensor, determines an engine position signal pattern that has at least one discontinuity and that is sufficiently developed to determine engine speed and position, and generates an emulated engine position signal pattern that is time-shifted relative to the determined engine position signal pattern; and (E) a liquid fuel controller coupled to the dual fuel controller and to the liquid fuel injector, wherein the liquid fuel controller receives the emulated engine position signal pattern from the dual fuel controller and controls the liquid fuel injector based at least in part on the emulated engine signal position pattern. - View Dependent Claims (17)
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Specification