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    The Next Generation

    The Propane Diesel Injection (PDI) system injects propane into a diesel engine, resulting in better fuel efficiency. No engine modifications are required in order to install the DPI system.

Diesel Propane Injection System

The Propane Fuel Technologies’ Diesel Propane Injection (DPI) system injects Liquid Propane Gas (LPG) into a diesel engine, blending the propane and diesel, which results in better fuel efficiency. The engine is fed with each fuel separately but simultaneously. The propane is fed through the engine’s intake manifold and mixed with air. Then the mixture is drawn into the compression chamber and compressed to ignite with the diesel. The engine’s Electronic Control Unit (ECU) then adjusts the amount of diesel injected into the combustion chamber accordingly. No engine modifications are required in order to install the DPI system.

Up to 25% of the diesel normally used can be substituted by this process. However, at any given time, the optimum amount of substituted propane needed in order to maximize engine efficiency depends on the engine’s workload. So the diesel/propane ratio must be able to change in order to achieve maximum efficiency. The PDI system’s Black Box continuously monitors the engine’s workload and alters the amount of propane it injects in order to change the ratio.

The fuel storage tank is a conventional LPG tank. It is equipped with an electric lock off which, when the DPI system is enabled, is opened so fuel can flow from the discharge valve to the frame. The fuel tank is also fitted with a fuel level device which is connected to the Electronic Control Module (ECM) which monitors the fuel usage and displays the fuel level to a fuel level indicator which is mounted in the dash. LPG tanks are mounted in various locations on the vehicle depending on the space and size needed to safely mount the tank.