Back to results
US 2010/0147262 A1Published application
Engine fuel supply system
AssigneesInspecs Limited, Flitch Limited
InventorsPeter Martin, Andrew Smith
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneesInspecs Limited, Flitch Limited
InventorsPeter Martin, Andrew Smith
Estimating the term…
Apparatus for controlling dual fuel supply to a fuel injected engine having an electronic engine management system (1) that supplies a primary injector control signal (8) to each of primary fuel injectors (2), the apparatus comprising an emulator (11) that emulates the electrical characteristics of a primary injector, a fuel control switch (10) that switches the primary injector control signal (8) from the primary injector (2) to the emulator (11) when an alternative mode is selected, a monitor (16) that monitors the primary injector control signal (8) to produce a monitor signal, and a controller (4) that processes the monitor signal to derive an alternative control signal which is used to control the primary fuel supply or a mixture of the primary fuel and a secondary fuel such as LPG, to the engine. Preferably the primary fuel supply is modulated by controlling injector control pulses. A secondary fuel may also be injected (3) and controlled by the controller (4).
1-17. (canceled)
Apparatus for controlling fuel supply to a fuel injected engine having an electronic engine management system that supplies a primary injector control signal to each of primary fuel injectors, the apparatus comprising an emulator that emulates the electrical characteristics of a primary injector, a fuel control switch that switches the primary injector control signal from the primary injector to the emulator when an alternative mode is selected, a monitor that monitors the primary injector control signal to produce a monitor signal, and a controller that processes the monitor signal to derive an alternative control signal which is used to control the primary fuel supply or a mixture of the primary fuel and a secondary fuel, to the engine.
A method of controlling fuel supply to an engine adapted to run on a primary fuel or a combination of the primary fuel and a secondary fuel, the primary fuel being injected by one or more primary fuel injectors under the control of a primary injector control signal generated by an electronic engine management system, the method comprising providing an emulator to emulate the electrical characteristics of a primary fuel injector, a fuel control switch to switch the primary injector control signal from the primary injector to the emulator when an alternative mode is selected, a monitor to monitor the primary injector control signal to produce a monitor signal, and a controller to process the monitor signal to derive alternative control signals which are used to control supply of the primary or a mixture of primary and secondary fuels to the engine.
Dependencies are inferred from the claim text.