Engine control device and engine control method
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsKengo Tanaka, Yusuke Imamori, Sota Watanabe, Taro Tamura
Life of this patent
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Abstract
In this engine control device for controlling an engine with a turbocharger, a rotation speed increase mode includes at least one stage of fuel injection in one combustion cycle of the engine, a high-idle mode includes at least two stages of fuel injection in one combustion cycle of the engine, and a high-idle mode execution unit is configured to retard the timing of the second stage fuel injection in one combustion cycle of the engine in the high-idle mode, relative to the timing of the first stage fuel injection in one combustion cycle of the engine in the rotation speed increase mode.
Claims11
An engine control device for controlling an engine with a turbocharger, the device comprising:
- a rotation speed increase mode execution unit configured to execute a rotation speed increase mode which is a mode for increasing a rotation speed of the engine while operating the engine with no load;
- a high-idle mode execution unit configured to execute a high-idle mode for operating the engine with no load, which is different from the rotation speed increase mode, when a first parameter relating to an operation state of the engine reaches a threshold value in the rotation speed increase mode;
- and
- a load application mode execution unit configured to execute a load application mode which is a mode for applying a load to the engine, after the high-idle mode is executed,
- wherein the rotation speed increase mode includes at least one stage of fuel injection in one combustion cycle of the engine,
- the high-idle mode includes at least two stages of fuel injection in the one combustion cycle of the engine, and
- the high-idle mode execution unit is configured to retard a timing of second stage fuel injection in the one combustion cycle of the engine in the high-idle mode, relative to a timing of first stage fuel injection in the one combustion cycle of the engine in the rotation speed increase mode.
An engine control method for controlling an engine with a turbocharger, the method comprising:
- a rotation speed increase mode execution step of executing a rotation speed increase mode which is a mode for increasing a rotation speed of the engine while operating the engine with no load;
- a high-idle mode execution step of executing a high-idle mode for operating the engine with no load, which is different from the rotation speed increase mode, when a first parameter relating to an operation state of the engine reaches a threshold value in the rotation speed increase mode;
- and
- a load application mode execution step of executing a load application mode which is a mode for applying a load to the engine, after the high-idle mode is executed,
- wherein the rotation speed increase mode includes at least one stage of fuel injection in one combustion cycle of the engine,
- the high-idle mode includes at least two stages of fuel injection in the one combustion cycle of the engine, and
- in the high-idle mode execution step, a timing of second stage fuel injection in the one combustion cycle of the engine in the high-idle mode is retarded, relative to a timing of first stage fuel injection in the one combustion cycle of the engine in the rotation speed increase mode.
An engine control device for controlling an engine with a turbocharger, the device comprising:
- a rotation speed increase mode execution unit configured to execute a rotation speed increase mode which is a mode for increasing a rotation speed of the engine while operating the engine with no load;
- a high-idle mode execution unit configured to execute a high-idle mode for operating the engine with no load, which is different from the rotation speed increase mode, when a first parameter relating to an operation state of the engine reaches a threshold value in the rotation speed increase mode;
- and
- a load application mode execution unit configured to execute a load application mode which is a mode for applying a load to the engine, after the high-idle mode is executed,
- wherein the high-idle mode execution unit is configured to adjust a timing of fuel injection in one combustion cycle of the engine in the high-idle mode so that a second parameter relating to the operation state of the engine falls within a target range, and
- wherein the high-idle mode execution unit is configured;
- when the second parameter exceeds an upper limit PH of the target range, to advance the timing of the fuel injection in the one combustion cycle of the engine in the high-idle mode,
- when the second parameter falls below a lower limit of the target range, to delay the timing of the fuel injection in the one combustion cycle of the engine in the high-idle mode.
Dependencies are inferred from the claim text.