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US 4,480,616 AGranted
Knock control method and apparatus for an internal-combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKeiso Takeda
Life of this patent
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Abstract
When the operating condition of an engine is in a predetermined knock-development range, an antiknock agent is supplied to the engine. The ignition timing of the engine is advanced after a predetermined time has elapsed subsequent to the start of supplying the antiknock agent.
Claims15
A knock control method for an internal-combustion engine, comprising the steps of:
- detecting the operating condition of the engine to produce at least one engine parameter signal which is indicative of the detected operating condition;
- in response to said engine parameter signal, discriminating whether the operating condition of the engine is in a predetermined knock-development range wherein the engine has a greater tendency to knock;
- if it is determined that the operating condition of the engine is in said predetermined knock-development range, supplying an antiknock agent to the engine;
- and
- after supplying the antiknock agent to the engine, advancing the ignition timing a predetermined time after the start of supplying the antiknock agent.
2 more elements
A knock control method for an internal-combustion engine, comprising the steps of:
- detecting the operating condition of the engine to produce at least one engine parameter signal which is indicative of the detected operating condition;
- in response to said engine parameter signal, discriminating whether the operating condition of the engine is in a predetermined knock-development range wherein the engine has a greater tendency to knock;
- if it is determined that the operating condition of the engine is in said predetermined knock-development range, supplying an antiknock agent to the engine;
- and
- gradually advancing the ignition timing to a crank angle where the best torque can be obtained once the antiknock agent is supplied to the engine.
2 more elements
A knock control apparatus for an internal-combustion engine, comprising:
- means for detecting the operating condition of the engine to produce at least one engine parameter signal which is indicative of the detected operating condition;
- means responsive to said engine parameter signal for discriminating whether the operating condition of the engine is in a predetermined knock-development range wherein the engine has a greater tendency to knock;
- means for supplying an antiknock agent to the engine if it is determined that the operating condition of the engine is in said predetermined knock-development range;
- and
- means for advancing the ignition timing after a predetermined time has elapsed subsequent to the start of supplying the antiknock agent.
2 more elements
Dependencies are inferred from the claim text.