Operating a Gasoline Engine at Constant low Temperature Conditions. The Influence of Different Fuel Droplet Sizes 961999
This paper describes an investigation of one operating point of the transient warmup curve of a gasoline engine. Coolant liquid and oil of this engine have been cooled down to a constant low level in order to perform detailed measurements and an analysis of this particular warmup point.
The influence of low coolant temperature, different pressure drop in an air assisted fuel injection system and a variation of ignition angles on specific fuel consumption, exhaust emissions, energy conversion etc. will be shown. The results show that the suggested test procedure (keeping the coolant temperature at a constant low level) provides the possibility to simulate the behaviour of an engine with air assisted fuel injection during warmup.
During this warmup period it is desired to run the engine with retarded ignition timing to realize a fast catalyst warmup. For this case it could be shown that an air assisted fuel injection can be helpful to reduce HC emission and fuel consumption during this period.
Citation: Manz, P., "Operating a Gasoline Engine at Constant low Temperature Conditions. The Influence of Different Fuel Droplet Sizes," SAE Technical Paper 961999, 1996, https://doi.org/10.4271/961999. Download Citation
Author(s):
P.-W. Manz
Affiliated:
Volkswagen AG
Pages: 9
Event:
1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Ignition timing
Fuel injection
Exhaust emissions
Fuel consumption
Coolants
Test procedures
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