Abstract: A dual piston valve system of a fuel system of a compression ignition engine to control and contain two distinct liquid fuels available to the valve at low pressure while allowing full flow through the valve of whichever one of the fuels is selected and preventing any cross leakage between the fuels.

Abstract: A dual piston valve system to control and contain two distinct liquid fuels available to the valve while allowing full flow through the valve of whichever one of the fuels is selected and preventing any cross leakage between the fuels.

Abstract: A system controlling a multi-fuel compression ignition engine includes a crankshaft position sensor, an electronic control module for receiving an original time signal from the crankshaft position sensor and signaling the fuel injectors when to inject fuel into the combustion chamber in relation to when each piston is at top-dead-center, an injection pulse duration, and quantity and pressure under which the fuel is injected, and an electronic phase adjustor module for intercepting the time signal before it reaches the electronic control module, and when the fuel supplied to the engine is other than 100% No. 2 diesel or petroleum diesel fuel. The electronic phase adjustor module generates a revised time signal relative to time signal in terms of degrees of rotation of the crankshaft, so that when the engine is running on other than 100% No. 2 diesel or petroleum diesel fuel, harmful exhaust emissions are minimized.