Performance of Sequential Port Fuel Injection on a High Compression Ratio Neat Methanol Engine 872070
A Sequential fuel injection system was fitted to a 2 liter Nissan NAPS-Z engine that had been modified for neat methanol operation. The specific modifications for high compression operation with neat methanol are described, and baseline brake thermal efficiency and engine out emissions are established. Sequential injection operation on neat methanol included varying the beginning of injection between 50°BTDC and 250°ATDC over an equivalence ratio of 0.6 to 0.9. Efficiency and emission results with the Sequential system are compared to those from the base system and from selected references. For the low speed, steady state conditions used in this program, the Sequential system did not show any general improvement in efficiency or emissions. This result is directionally opposite to that observed in one reference. The apparent cause for the divergent results is the absence of mechanisms in this experiment to prevent mixing along the cylinder axis.
Citation: Clemmens, W., "Performance of Sequential Port Fuel Injection on a High Compression Ratio Neat Methanol Engine," SAE Technical Paper 872070, 1987, https://doi.org/10.4271/872070. Download Citation
Author(s):
William Clemmens
Affiliated:
U.S. Environmental Protection Agency
Pages: 20
Event:
1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Methanol - Promise and Problems-SP-0726
Related Topics:
Fuel injection
Methanol
Engine cylinders
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »