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US 12,442,335 B2Granted
Engine control device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroaki Kosaka
Life of this patent
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Abstract
The control device is applied to an engine that uses hydrogen as a fuel. The control device includes a processing circuit that adjusts the valve overlap amount by controlling the valve timing of at least one of the intake valve and the exhaust valve. The processing circuit increases the amount of valve overlap when the engine is operated in the high-load, high-rotation range as compared to the case where it is not.
Claims4
An engine control device for an engine that uses hydrogen as a fuel, the engine control device comprising:
- a processing circuit configured to:
- acquire an engine speed;
- acquire a current amount of air flowing into a plurality of cylinders of the engine;
- acquire a maximum amount of the air based on a steady operation of the engine at the acquired engine speed with a fully opened throttle valve;
- acquire an engine load factor which corresponds to a ratio of the current amount of air to the maximum amount of air;
- determine the engine is operating in a high-load/high-rotation range when (i) the acquired engine speed is greater than or equal to a first threshold value, and (ii) the engine load factor is greater than or equal to a second threshold value that is mapped to the acquired engine speed;
- and
- control a valve timing of at least one valve of an intake valve and an exhaust valve so as to increase a valve overlap amount to a predetermined maximum value when the engine is determined to be operating in the high-load/high-rotation range.
5 more elements
Dependencies are inferred from the claim text.