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Frequently Asked Questions
Please read these FAQ’s before you ask questions
What does Dual Phase Induction mean?
Dual Phase Induction is the simultaneous combustion of two fuels, namely Diesel and Gas, whether Compressed Natural Gas (CNG) or Liquefied Petroleum Gas (LPG).
Will my engine have to be modified to operate in a Dual Phase Injection environment?
No. The GFSI system has been designed to allow for either a depot or service center to retrofit or alternatively, a factory fit installation. As the system is fitted externally, the installation is 'non invasive' with no modifications required for the engine. In addition, there is no alteration of any critical engine parameters.
What research and development has been done to date? Have any converted vehicles traveled many kilometers since installation incident free?
The research and development program is based around ensuring a working solution on all leading manufacturers of drive trains including Cummins, Perkins Caterpillar and Volvo. Accordingly, the system has been operational on the following test vehicles:
- Mack (American) engine for 8 months, traveling approximately 15,000 kilometers per month.
- Freight liner with Detroit Series 60 for 6 months, traveling 30,000 kilometers per month.
- Kenworth with Caterpillar engine for 2 months, traveling 40,000 kilometers per month.
- Scania 420 (UK) for 8 months, traveling, on average, 8000 miles per month.
- Nissan Navara 2.7 liter Diesel for 6 months. This vehicle has not traveled excessive kilometers as its primary use is as an emission test vehicle.
- In addition the DPI System has now been installed on a variety of Prime Movers, rigid trucks and smaller 4WD vehicles. All are operating within normal parameters, incident free and reporting fuel and emission savings.
What effect will the GFSI system have on the durability of my engine?
Results to date have shown that service intervals have doubled, i.e. extended oil changes from approximately 30,000 kilometers to 60,000 kilometers with no reduction in oil viscosity. The engine burns cleaner and subsequently, there is less 'sludging' allowing operators to review engine maintenance intervals.
What are the expected economic benefits apart from the environmental aspects?
Fuel efficiency. The system reduces the amount of Diesel by approximately 10% - 20% while simultaneously using about 12% (of the original Diesel volume) as a gas replacement.
What changes can be expected in exhaust emissions?
Particulate emissions, the 'black plume', virtually disappear, certainly to the eye, and there are often reductions in Greenhouse Gases.
What does the gas do to the torque of the engine?
The torque curve reaches its peak earlier resulting in fewer gear changes. A safety byproduct of this earlier torque curve is reduced driver fatigue. At all times, this increase in torque is maintained within OEM specifications by the DPI module.
What safety factors are associated with LPG and CNG use
The installation process is 'non invasive' and does not alter the integrity of the original Diesel engine. All tanks, valves and fittings comply with EU and ASNZ Standards and the inherent, multiple safety 'cut-offs', both of a mechanical and electronic nature, prevent any chance of LPG or CNG leakage.
In addition, GFSI installs sensors throughout the engine that monitor the operating environment. Should any sensor detect abnormal operating conditions, the gas is shut off and an alarm is recorded in the log for later diagnosis.
What noise levels are expected?
Often the 'diesel knock' is reduced significantly, offering quieter engine performance.
As the engine operates as a 'dual fuel', what happens if the gas runs out?
The engine reverts back to Diesel only mode and therefore all performance characteristics revert to normal.
