Internal-combustion engines – Starting device – With fuel or intake air control
Reexamination Certificate
2007-10-16
2007-10-16
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Starting device
With fuel or intake air control
C123S435000
Reexamination Certificate
active
11227295
ABSTRACT:
The start control procedure of the invention lags an open-close timing VVT of an intake valve, restricts a throttle opening TH of a throttle valve, and starts cranking an engine with a lower torque Tlow. When a pressure Pf of a fuel supplied to in-cylinder fuel injection valves reaches or exceeds a preset reference value, which is greater than a sum of an in-cylinder compression pressure Pin and a closed valve position-retaining pressure Pcv of the in-cylinder fuel injection valves, the start control procedure cranks the engine with a standard cranking torque Tset. The start control procedure then starts advance of the open-close timing VVT of the intake valve, cancels the restriction of the throttle opening TH, and starts fuel injection from the in-cylinder fuel injection valves. This arrangement enables the fuel pressure Pf to quickly rise to or above the sum of the in-cylinder compression pressure Pin and the closed valve position-retaining pressure Pcv, and thereby effectively prevents the in-cylinder fuel injection valves from being inadequately opened.
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Fukui Keita
Hasegawa Keiko
Inoue Toshio
Suzuki Naoto
Tomatsuri Mamoru
Castro Arnold
Cronin Stephen K.
Kenyon & Kenyon LLP
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