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EP0831227A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Control apparatus for an in-cylinder injection spark-ignition internal combustion engine

Assignee: Mitsubishi Motors Corp
•
Filing: 1997-08-26
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Granted: —
•
Expires: 2017-08-26
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Abstract

Abstract A control apparatus for an in-cylinder injection spark-ignition internal combustion engine, which includes a fuel injection valve (4) for injecting a fuel directly into a combustion chamber (5) and a spark plug (3) for subjecting the fuel to spark ignition in the combustion chamber (5), and operates in an intake-stroke injection mode where the fuel is injected mainly in an intake stroke or a compression-stroke injection mode where the fuel is injected mainly in a compression stroke, comprises load correlation value calculation means for calculating a load correlation value of the internal combustion engine, ignition timing setting means for setting a reference ignition timing for the spark plug in accordance with the fuel injection mode and the load correlation value, and correction means for correcting the reference ignition timing in accordance with the operating state (S14,S16), the control apparatus further comprising correction limiting means for limiting the correction when the fuel injection mode is the compression-stroke injection mode (S20,S22,S24,S26).

Inventors

  • 👤 Hitoshi Kamura
  • 👤 Kenjiro Hatayama
  • 👤 Hiroki Tamura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 16:51
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3023; F02D41/3029; F02D37/00; F02D37/02; F02D41/32; F02D41/34; F02D41/345; F02P; F02P5/00; F02P5/04; F02P5/045; F02B; F02B2275/00; F02B2275/18; F02D41/38; F02D2041/389; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 215 words
A control apparatus for an in-cylinder injection spark-ignition internal combustion engine, the engine including a fuel injection valve (4) for injecting a fuel directly into a combustion chamber (5) and a spark plug (3) for subjecting the fuel to spark ignition in the combustion chamber (5), the fuel injection valve (4) being controlled in either an intake-stroke injection mode where the fuel is injected mainly in an intake stroke or a compression-stroke injection mode where the fuel is injected mainly in a compression stroke, the control apparatus comprising: operating state detection means for detecting an operating state of the internal combustion engine; injection mode selection means for selecting the intake-stroke injection mode or the compression-stroke injection mode in accordance with the operating state detected by the operating state detection means; load correlation value calculation means for calculating a load correlation value of the internal combustion engine; ignition timing setting means for setting a reference ignition timing for the spark plug in accordance with the injection mode and the load correlation value; correction means for correcting the reference ignition timing in accordance with the operating state (S14,S16), characterized in that: said control apparatus further comprises correction limiting means for limiting the correction when the compression-stroke injection mode is selected by the injection mode selection means (S20,S22,S24,S26).
Claim 2
Dependent Claim 58 words
The apparatus according to claim 1, characterized in that said correction means includes correction factor calculation means for calculating a correction factor for the reference ignition timing in accordance with the operating state and corrects the reference ignition timing in accordance with the correction factor, and said correction limiting means limits the correction factor to a small value.
Claim 3
Dependent Claim 43 words
The apparatus according to claim 2, characterized in that said correction factor calculation means calculates a plurality of correction factors in accordance with the operating state, and said correction limiting means limits at least one of the correction factors to a small value.
Claim 4
Dependent Claim 24 words
The apparatus according to claim 3, characterized in that said correction limiting means prohibits correction based on at least one of the correction factors.
Claim 5
Dependent Claim 29 words
The apparatus according to claim 1, characterized in that said correction limiting means prohibits the correction when the compression-stroke injection mode is selected by the injection mode selection means.
Claim 6
Dependent Claim 56 words
The apparatus according to claim 1, which further comprises injection timing control means for controlling the fuel injection timing of the fuel injection valve, characterized in that said correction limiting means permits correction corresponding to a change of the fuel injection timing when the fuel injection timing is changed by the injection timing control means (S28,S29).

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