Engine torque limit control
AssigneePerkins Engine Company Limited
InventorsNicholas TIMMINS, James Pardoe, Simaranjit Gill, Adam Turnock, Mark Harriott
Life of this patent
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Abstract
A method for controlling a torque limit of an engine, which includes activating a power boost mode in which an enhanced engine torque limit for the engine is temporarily enabled in place of a normal engine torque limit for the engine. In this way, on receipt of a transient load demand during an operational period of the power boost mode, a fuel rate of the engine may be increased to attempt to meet the transient load demand while maintaining an engine torque of the engine within the enhanced engine torque limit.
Claims19
A method for controlling a torque limit of an engine, the method comprising the steps of:
- a) starting the engine;
- b) increasing an engine speed of the engine up to a desired engine speed;
- c) activating a power boost mode once an actual engine speed of the engine equals the desired engine speed, wherein, while the power boost mode is active, an enhanced engine torque limit for the engine is enabled in place of a normal engine torque limit for the engine;
- d) initiating a run-timer to measure an operational period of the power boost mode;
- e) on receipt of a transient load demand during the operational period of the power boost mode, increasing a fuel rate of the engine to attempt to meet the transient load demand while maintaining an engine torque of the engine within the enhanced engine torque limit;
- and
- deactivating the power boost mode once the run-timer exceeds a pre-determined time threshold for the operational period.
An engine comprising a plurality of cylinders and a controller, the controller being enabled to control a torque limit of the engine;
- the controller being configured to;
- a) start the engine;
- b) increase an engine speed of the engine up to a desired engine speed;
- c) activate a power boost mode once an actual engine speed of the engine equals the desired engine speed, wherein, while the power boost mode is active, an enhanced engine torque limit for the engine is enabled in place of a normal engine torque limit for the engine;
- d) initiate a run-timer to measure an operational period of the power boost mode;
- e) on receipt of a transient load demand during the operational period of the power boost mode, increase a fuel rate of the engine to attempt to meet the transient load demand while maintaining an engine torque of the engine within the enhanced engine torque limit;
- and
- f) deactivate the power boost mode once the run-timer exceeds a pre-determined time threshold.
Dependencies are inferred from the claim text.