Modification of engine control signal timing by emulation of engine position sensors

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.

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.