Browse Publications Technical Papers 2001-01-0145
2001-03-05

The Studies of an Electronically Controlled CNG System for Dual Fuel Engines 2001-01-0145

In order to improve the engine's emission performance and convert diesel engine to dual fuel engine, an electronically controlled natural gas injection system is developed for the X6130 naturally aspirated bus diesel engine. The system includes gas supply, electronic control unit(ECU) and auxiliary systems, which consists of harness, sensors, mechanical diesel control system and diagnostic system. The injection natural gas pressure is 1 MPa and six high-speed solenoid valves(HSV) are used to control natural gas injection timing and quantity of each cylinder at each work cycle. The ECU is based on the MC68HC811A1 microcontroller unit(MCU) and the system software is edited by MOTOROLA assembly language. The test results show that the system has great advantage in the aspects of emission and economy. Adopting multi-point electronic control injection for dual fuel system can get as high as 92% of CNG substitution at rated power and reduce NOx and PM emissions greatly. Then we conduct the environment test for ECU and make road-running test on bus. The test results show that the dual fuel system is a practical system and that using dual fuel system to convert diesel engine is an important way to exert the advantage of natural gas in improving the emission of a bus engine.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

A Novel Start Algorithm for CNG Engines Using Ion Sense Technology

2000-01-2800

View Details

TECHNICAL PAPER

Electric/Electronic Integration in Dual Fuel Engine - Diesel/Gas

2013-36-0212

View Details

TECHNICAL PAPER

Development of a Diesel Particulate Filter Burner Control System for Active Trap Regeneration

2007-01-1064

View Details

X