Multi-fuelling an engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 11, 2012
Grant Date -
Apr 21, 2011
app pub date -
Mar 2, 2009
filing date -
Feb 28, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A compression ignition engine is supplied with a first fuel in a flow of air and a second fuel is injected into the combustion chamber. The first fuel comprises a more volatile fuel than diesel such as ethanol, LPG or other combustible gas; the second fuel comprises diesel or biodiesel; and the second fuel is injected in multiple pulses in each ignition cycle with the first pulse acting as a pilot pulse to trigger ignition, and the timing of the second pulse being such as to modify the temperature through evaporation of the second fuel and thereby reduce the combustion temperature and mitigate knock susceptibility. Preferably the pilot pulse is followed by a single further pulse of the second fuel in the ignition cycle. The engine may be controlled to operate in two different modes, one mode for light and medium load conditions when there is only a pilot pulse injection of the second fuel which reduces NOx and soot emissions, and the other mode for higher load conditions when there is a pilot pulse injection followed by a main pulse injection of the second fuel. The first fuel may comprise bioethanol and or one or more of the following: ethanol, butanol, propanol, lpg, natural gas, hydrogen.
First Claim
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Cited Art Landscape
Patent Citation Ranking
- 12 Citation Count
- F02B Class
- 63.81 % this patent is cited more than
- 13 Age
