Patent ID: 7331325
Filing Date: 2008-02-19
Classification: F02D,F02P,Y02T

Abstract:
1. A direct-injection spark-ignition internal combustion engine, comprising: an injector fitted to an upper wall of a combustion chamber, in a central area thereof, for injecting fuel directly into the combustion chamber, an ignition plug provided with an electrode part positioned within or near a fuel injection area in which fuel injected by the injector spreads, a cavity formed in a top face of a piston to guide fuel injected by the injector to near the electrode part of the ignition plug, operational status detection means for detecting operational status of the internal combustion engine indicative of a steady operation state of the internal combustion engine, and ignition timing control means for controlling ignition timing for the ignition plug, wherein the ignition timing control means controls the ignition timing, depending on the operational status detected by the operational status detection means, such that ignition is carried out at least either during or immediately after fuel injection by the injector, or at the time when fuel injected by the injector arrives near the electrode part by being guided by the cavity.