Directly Injected Natural Gas Fueling of Diesel Engines
961671
08/01/1996
- Event
- Content
- A new injector has been designed for sequential injection of high-pressure natural gas and a quantity of liquid diesel fuel directly into diesel engine cylinders late in the compression stroke. Injected a few degrees before the natural gas, the pilot liquid fuel auto-ignites and serves, as it burns, to ignite the gaseous fuel which enters the chamber as an underexpanded sonic jet generating high local turbulence. Tests on a single-cylinder two-stroke engine with full electronic control have demonstrated the capability of this fueling method to nearly match conventional diesel engine efficiency over a wide range of load and substantially reduce the emissions of oxides of nitrogen (NOx), particulate mater (PM) and carbon dioxide (CO2).
- Pages
- 11
- Citation
- Hodgins, K., Hill, P., Ouellette, P., and Hung, P., "Directly Injected Natural Gas Fueling of Diesel Engines," SAE Technical Paper 961671, 1996, https://doi.org/10.4271/961671.