Method and apparatus for controlling the ignition point in internal combustion engines
AssigneeBombardier Motor Corporation of America
InventorWolfram Hellmich
Life of this patent
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Abstract
A method and apparatus for controlling the ignition in an internal combustion engine with a device for injecting fuel into a combustion chamber of the engine is provided, in which a control signal for the injection process and a control signal for the ignition process are used. The control signal for the injection process is used to start the measurement of a predetermined.
Claims30
A method for controlling the ignition in a two-stroke internal combustion engine having a high-pressure injection device for injecting fuel into a combustion space of the internal combustion engine, the fuel being directly injected into the combustion space and mixing with the air located therein to form a fuel/air mixture, the method comprising the steps of:
- determining an ignition time at which an ignition of the fuel/air mixture is carried out above one of a specific load threshold of a rotational speed threshold by measuring a predetermined angular position of a crankshaft, and
- generating a control signal for the injection process below the rotational speed threshold to start a measurement of a predetermined delay time, the expiration of which specifies an ignition time at which the control signal for ignition is output.
A method for controlling ignition in a two-stroke internal combustion engine, comprising:
- directly injecting fuel into an internal combustion engine, the fuel being directly injected into a combustion space to mix with air located therein to form a fuel/air mixture;
- establishing a time at which the fuel/air mixture is ignited, the fuel/air mixture being ignited after one of a specific load threshold and a rotational speed threshold is achieved by measuring a predetermined angular position of a crankshaft, and
- generating a control signal for the injection process below the rotational speed threshold to start a measurement of a predetermined delay time, the expiration of which specifies an ignition time at which the control signal for ignition is output.
An engine control comprising:
- a high-pressure injection device to inject fuel into an engine;
- an ignition system to control spark ignition from a spark plug in the engine;
- and
- an ignition timing control connected to the ignition system and the high pressure injection device, and having stored therein a rotational speed threshold and configured to control an ignition of fuel at one of an angular position of a crankshaft and a delay time wherein the fuel is ignited at an angular position of a crankshaft when a rotational speed of the engine is above a rotational speed threshold, and wherein fuel is ignited after a delay time when the rotational speed of the crank shaft is below the rotational speed threshold.
An engine control system comprising:
- a. fuel injection system having at least one high-pressure injection device to directly inject fuel into a cylinder of an engine after receipt of an injection signal;
- an ignition system having at least one spark device to ignite the injected fuel in the engine;
- a control having selective control over how and when an ignition signal is generated to the spark device, the control:
- initiating a delay timer after generation of an injection signal and causing generation of an ignition signal after expiration of the delay timer when in a first mode of operation;
- and
- causing generation of an ignition signal based on rotation position detection when in a second mode of operation.
Dependencies are inferred from the claim text.