Start-up control for internal combustion engine

Details Start-up control for internal combustion engine Start-up control for internal combustion engine

2007-04-04

2008-08-19

Kwon, John T (Department: 3747)

Internal-combustion engines

Starting device

With fuel or intake air control

C123S182100

Reexamination Certificate

active

07412954

ABSTRACT:
An internal combustion engine (101, 601, 901) alters an effective compression ratio from an effective compression ratio for a start-up operation to a larger effective compression ratio for a normal operation when an engine rotation speed (NE) increases beyond a resonance rotation speed region during cranking. A controller (104, 610, 910) determines whether or not the engine (101, 601, 901) has reached a combustion possible state on the basis of the engine rotation speed (NE) during cranking and an operating parameter (PA, TA, TW, P_Rail, V_Ang) other than the engine rotation speed (NE) (S1102, S1202, S1204). When the determination is negative, the controller (104, 610, 910) inhibits fuel supply to the engine (101, 601, 901) by a fuel supply device (207), even when the engine rotation speed has increased beyond the resonance rotation speed region (S406). In so doing, a combustion defect such as a misfire is prevented.

REFERENCES:
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patent: 5724863 (1998-03-01), Kramer et al.
patent: 6761147 (2004-07-01), Majima
patent: 7117827 (2006-10-01), Hinderks
patent: 7255089 (2007-08-01), Etou et al.
patent: 2006/0081207 (2006-04-01), Nakamura
patent: 2001-123857 (2001-05-01), None

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