Although the idea of introducing LPG as a liquid directly behind the intake valve is not new and has been tampered with over the last fifteen years, it has not been until now that a suitable, reliable and proven system has been released in Australia (July 1, 2008). With extensive testing, design and development in Europe, approximately 40,000 vehicles have been fitted with LPG liquid injection systems, and now this successful and desirable technology has been introduced to Australia.

Significant design changes have been employed since its conception fifteen years ago.

Unlike Vapour injection systems, the JTG ICOM Liquid Injection System uses a system specific gas cylinder. The gas cylinder incorporates an internal, roller cell, high pressure fuel pump. This boosts gas delivery above cylinder pressure and insures a constant flow of consistent, pressurized liquid LPG to the fuel rail. The fuel pressure is governed by a pressure regulator on a fuel return line. This is the same principle employed on a petrol injected system. The return line ensures that the fuel is circulated, and that the old problem of heat sink and fuel vaporization in the fuel rail is eliminated

JTG Good liquid LPG injection systems greatly differ from a vapour injection system as they do not have an LPG ECU to tune a generic size injector to a broad range of engine applications. Instead the fuel volume required is achieved by flow rating the siemens made liquid LPG injector too the compensated flow rate of the original petrol injectors. The injector operation is now controlled by the standard unmodified petrol injector signal

Switching between petrol and LPG is done through a solid state control unit that simply directs the petrol injector signal to the LPG injection system. Inside the vehicle, LPG injection system operation is shown on a small LPG switch gauge assembly. This enables us to manually switch between fuels at will, display LPG Level, and display which fuel has been selected.
The JTG Liquid Injection System may be used successfully in a dual fuel or straight gas application.