Dedicated natural gas engines have very high operating temperatures (approximately 650℃), which require high-temp parts and are well above the operating temperatures of a diesel engine. To preserve the freedom of choice of operating in either a dual fuel mode or a diesel only mode, the maximum amount of natural gas needs to be carefully monitored and controlled to operate within OEM temperature and pressure specifications.
No. APG’s Dual Fuel System does not operate on LPG because the BTU content is too high to efficiently run in a dual fuel application.
Where dedicated natural gas engines require special high-temp oil formulation and maintenance cycles, APG’s Dual Fuel System allows the engine to operate with standard diesel engine oil formulations and maintenance cycles.
APG does not interfere with the engine integrity or normal governor operation. The conversion technology has been designed to allow for in-field retrofit of diesel engines without the need to change or modify the design of the base OEM engine. The conversion hardware is mounted externally and does not require modification of the base engine.
No. Engines converted to APG’s Dual Fuel System maintain the rated power and torque of the OEM base diesel engine platform.
If the natural gas supply is lost or depleted, the APG system automatically changes over from dual fuel to diesel only operation. There is no range anxiety or lost time with an APG Dual Fuel System. When natural gas pressure is restored, the process seamlessly returns to dual fuel operation. Engines with APG’s Dual Fuel System will not run exclusively on natural gas.
The natural gas industry is ever evolving, so this list is subject to change with any additional Natural Gas
sources. As of publication, APG’s Dual Fuel System can operate on the following sources of natural gas
as long as BTU ratings are safe for engine use – Animal RNG, Landfill RNG, Processed Flared Methane,
Processed Field Gas. Contact us for more information on application-based gas analysis requirements.
Yes and yes. Our system is agnostic to the source and storage type of Natural Gas.
During initial startup, the engine operates on 100% diesel fuel. After certain permissive criteria are satisfied, the APG automatic control system commences dual fuel operation. When idling, the engine operates on 100% diesel.
Yes. Since APG’s Dual Fuel System is a simple energy substitution system (a btu of natural gas is substituted for a btu of diesel fuel), and because the carbon intensity of the natural gas is lower than that of diesel, the carbon available as a byproduct of combustion is lower. When dairy Renewable Natural Gas is used with APG’s Dual Fuel System, it creates a pathway for fuel usage that runs negative according to our 2021 carbon intensity analysis through EcoEngineers, an independent third-party auditing firm. Report available upon request through our Contact Us form.