US 2007/0175437 A1 · Control system for internal combustion engine

Abstract

A control system for an internal combustion engine having at least one fuel injection valve for injecting fuel into a combustion chamber of the engine, and an exhaust gas recirculation mechanism for recirculating a portion of exhaust gases from the engine to the combustion chamber. The exhaust gas recirculating mechanism includes an exhaust cooler for cooling the recirculated exhaust gases. A target ignition timing of the fuel injected by the fuel injection valve is calculated. An actual compression ignition timing of the fuel injected by the fuel injection valve is detected. Operation of the exhaust cooler is controlled based on the target ignition timing and the actual compression ignition timing.

Claims8

Dependent claims

A control system for an internal combustion engine having fuel injection means for injecting fuel into a combustion chamber of said engine, said control system comprising:

fuel injection control means for controlling said fuel injection means;
exhaust gas recirculating means for recirculating a portion of exhaust gases from said engine to said combustion chamber;
exhaust cooling means for cooling the exhaust gases that are recirculated, wherein said exhaust cooling means is included in said exhaust gas recirculating means;
target ignition timing calculating means for calculating a target ignition timing of the fuel injected by said fuel injection means;
ignition timing detecting means for detecting an actual compression ignition timing of the fuel injected by said fuel injection means;
and
exhaust cooling control means for controlling an operation of said exhaust cooling means based on the target ignition timing and the actual compression ignition timing.

4 more elements

A control method for an internal combustion engine having at least one fuel injection valve which injects fuel into a combustion chamber of said engine, and an exhaust gas recirculation mechanism which recirculates a portion of exhaust gases from said engine to said combustion chamber, said exhaust gas recirculating mechanism including an exhaust cooler for cooling the exhaust gases that are recirculated, said control method comprising the steps of:

a) calculating a target ignition timing of the fuel injected by said at least one fuel injection valve;
b) detecting an actual compression ignition timing of the fuel injected by said at least one fuel injection valve;
and
c) controlling an operation of said exhaust cooler based on the target ignition timing and the actual compression ignition timing.

1 more element

Dependencies are inferred from the claim text.

Control system for internal combustion engine

Life of this patent

Control system for internal combustion engine

Life of this patent

Abstract

Claims8