Start-up control of in-cylinder fuel injection spark...

Details Start-up control of in-cylinder fuel injection spark... Start-up control of in-cylinder fuel injection spark...

2005-06-14

2005-06-14

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

C123S299000

Reexamination Certificate

active

06904890

ABSTRACT:
During start-up of an in-cylinder fuel injection spark ignition engine (1), an engine controller (21) calculates a start-up fuel injection pulse width TIST on the basis of a cooling water temperature Tw, an engine rotation speed Ne, and a fuel supply pressure Pf to a fuel injector (8) (S1). When the fuel supply pressure Pf exceeds a required fuel pressure, the engine controller (21) executes stratified combustion by means of compression stroke fuel injection. By setting the required fuel pressure precisely in accordance with a start-up condition defined by the start-up fuel injection pulse width TIST and the engine rotation speed Ne, the opportunities for stratified combustion during start-up increase, and the amount of hydrocarbon discharge decreases.

REFERENCES:
patent: 2002-89401 (2002-03-01), None
U.S. Appl. No. 10/885,076, filed Jul. 7, 2004, Iriya et al.

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