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Study for Reduction of Exhaust Emission of Direct Injection Diesel Engine
Technical Paper
1992-25-0239
Sector:
Event:
ISATA 1992
Language:
English
Abstract
Exhaust emission control for diesel engine has been getting stricter year by year and automotive engineers are making strenuous efforts to reduce NOx and Smoke level. Generally speaking NOx and Smoke can be reduced at the sacrifice of engine performance. It was reported that adoption of super high pressure injection, which makes it possible to burn even atomized fuel very quickly, can reduce NOx and Smoke levels without sacrificing fuel consumption. But, it is presumed that such system requires more time in terms of reliability and chassis mounting ease before it is applied to vehicle. This paper describes one example of NOx and Smoke reduction by using conventional injection pump after making changes in the pumping rate, nozzle hole diameter and number of nozzle holes including adoption of optimum compression ratio. Besides that, combustion process was observed by using the bottom view engine for consideration of the combustion mechanism.