Engine control device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHitoki Sugimoto
Life of this patent
Estimating the term…
Abstract
A control device changes an operation line of an engine to an operation line according to an alcohol concentration on the condition that warm-up of the engine has been completed. Thus, when warm-up of the engine has been completed, the control device changes an operating point that is set according to a required output toward a higher torque side and a lower speed side when the alcohol concentration in a blended fuel is high than when the alcohol concentration in the blended fuel is low. When warm-up of the engine has not been completed, the control device does not execute the change according to the alcohol concentration in the blended fuel of the operating point set according to the required output.
Claims4
An engine control device that is applied to a vehicle equipped with an engine capable of using a blended fuel in which an alcohol fuel and a gasoline fuel are blended, the engine control device configured to control the engine so as to achieve an engine torque and an engine speed that define an operating point set according to a required output, the engine control device comprising:
- a processor;
- and
- a memory storing program instructions that cause the processor to:
- acquire an alcohol concentration in the blended fuel by an alcohol concentration sensor;
- acquire an engine coolant temperature detected by a coolant temperature sensor;
- and
- determine whether the acquired engine coolant temperature is equal to or higher than a threshold, wherein
- in response to the determination that the acquired engine coolant temperature is equal to or higher than the threshold, the engine control device changes the operating point based on the acquired alcohol concentration, such that the operating point is changed to a higher torque side and a lower speed side as the acquired alcohol concentration increases;
- and
- in absence of the determination that the acquired engine coolant temperature is equal to or higher than the threshold, the engine control device does not change the operating point based on the acquired alcohol concentration.
Dependencies are inferred from the claim text.