Method and device for controlling mild hybrid vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsYoungMin Kim, Hyun Kim
Life of this patent
Estimating the term…
Abstract
A method for controlling a mild hybrid vehicle is disclosed. The method includes: controlling a multi-point injection (MPI) fuel system for supplying fuel to an engine for a low revolutions-per-minute (RPM) operation; subsequently, causing a gasoline direct injection (GDI) fuel system for a high RPM operation; switching to the multi-point injection fuel system when it is determined that the gasoline direct injection fuel system fails. The method further comprises calculating a torque deficiency due to the switching from the GDI fuel system to the MPI fuel system and controlling a starter-generator to generate an assist torque to compensate the torque deficiency.
Claims5
A method for controlling a vehicle, comprising:
- controlling, by a controller, a multi-point injection fuel system such that the multi-point injection fuel system supplies fuel to an engine;
- switching, by the controller, from the multi-point injection fuel system to a gasoline direct injection fuel system such that the gasoline direct injection fuel system supplies fuel to the engine when a number of rotation of the engine is greater than or equal to a reference speed after the multi-point injection fuel system is operated;
- determining, by the controller, whether a failure of the gasoline direct injection fuel system occurs;
- switching, by the controller, from the gasoline direct injection fuel system to the multi-point injection fuel system such that the multi-point injection fuel system supplies fuel to the engine when it is determined that the gasoline direct injection fuel system fails;
- subsequently to switching to the multi-point injection fuel system, estimating, by the controller, a torque drop for a current rotational speed of the engine;
- and
- controlling, by the controller, a starter-generator to assist torque of the engine by the estimated torque drop.
A device for controlling a vehicle, comprising:
- a multi-point injection fuel system configured to supply fuel to an engine;
- a gasoline direct injection fuel system configured to supply fuel to the engine when a number of rotation of the engine is greater than or equal to a reference speed after the multi-point injection fuel system is operated;
- and
- a controller configured to determine whether a failure of the gasoline direct injection fuel system occurs,
- wherein the controller is configured to:
- switch from the gasoline direct injection fuel system to the multi-point injection fuel system such that the multi-point injection fuel system supplies fuel to the engine when it is determined that the gasoline direct injection fuel system fails,
- subsequently to switching to the multi-point injection fuel system, estimate a torque drop for a current rotational speed of the engine, and
- control a starter-generator to assist torque of the engine by the estimated torque drop.
Dependencies are inferred from the claim text.