Investigations of the Gas Injection System on a HD-CNG-Engine University of Applied Sciences, Biel-Bienne, Switzerland

Format:

Conference/Event

Author/Creator:

Czerwiński, Janusz, author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

1AbstractIn the present work investigations of a 7.8 liter-TC-IC-IVECO-CNG engine were performed with single point (SPI) *) and with multipoint (MPI) gas injection systems.Three types of MPI injectors available on the market were compared for stationary and transient engine operation.There are several advantages of MPI e.g. better possibility to equalize the air-fuel-ratio of the cylinders, optimization of the gas injection timing and of the gas pressure for different operating conditions.With different injector types there are different optimum injection timings, due to different injection durations, but at the optimum conditions there is little difference in the combustion quality.The injectors with higher flow rate can cause more λ-excursions in the dynamic response and with sudden changes of the gas pressure.The gas pressure in the CNG-rail can be used to improve some operating conditions: lower pressure for low load, higher pressure for better dynamic response and for the full load operation

Notes:

Vendor supplied data

Publisher Number:

2003-01-0625

Access Restriction:

Restricted for use by site license