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,emulating the engine position signal pattern in a time-shifted manner, andcontrolling an engine component based at least in part on the emulated engine position signal pattern.
1 Assignment
0 Petitions
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.
35 Citations
17 Claims
-
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, emulating the engine position signal pattern 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, 8, 9, 10, 11, 12, 13)
-
7. The method of claim 7, wherein the discontinuity is generated by at least one of a missing tooth or an extra tooth on an encoder wheel tooth pattern of the engine position sensor.
-
14. A method of advancing or retarding an engine position signal in an IC engine comprising:
-
transmitting engine position signals from an encoder wheel-based engine position sensor to a first controller; using the first controller, determining an engine position signal pattern based on the signals received from the engine position sensor, using the first controller, emulating the determined engine position signal pattern in a time-shifted manner to produce an emulated engine position signal pattern, using a 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)
-
-
16. A multi-fuel engine comprising:
-
(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, 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 controls the liquid fuel injector based at least in part on the emulated engine signal position pattern. - View Dependent Claims (17)
-
Specification