Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer
Patent
1996-08-15
1998-04-07
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Gaseous fuel and air mixer
123478, F02M 2102
Patent
active
057352488
ABSTRACT:
A fuel injection method wherein optimum fuel injection timing in a fuel-injection type gas fuel engine is determined by setting fuel injection end timing to be after the start of opening of an intake valve. That is, when injection ends in a first half of the intake valve open period the volumetric efficiency .eta.v falls and the engine output also falls, because the injection period overlaps with a period of positive pressure arising inside the intake pipe before opening of the intake valve, but when injection ends in a second half of the intake valve open period the volumetric efficiency .eta.v rises and the engine efficiency also rises, because the injection period overlaps with a period of negative pressure arising in the intake pipe during the first half of the intake value open period. Consequently, when fuel is injected during this trough in the intake port pressure, the volumetric efficiency increases and the engine output also increases by several percent.
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Aoki Shigeru
Matsuura Hiromi
Minami Hideki
Nakajima Susumu
Nishida Toshiyuki
Argenbright Tony M.
Honda Giken Kogyo Kabushiki Kaisha
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