US 2022/0024441 A1 · Coasting Regeneration Control Method and Device of Vehicle with Continuously Variable Valve Duration Engine

Abstract

A coasting regeneration control method of a vehicle equipped with a continuously variable valve duration (CVVD) engine includes: determining, by an engine control unit (ECU), whether a current state of the vehicle satisfies coasting regeneration conditions; and entering, by the ECU, a coasting regeneration mode and performing regenerative braking when the current state of the vehicle satisfies the coasting regeneration conditions, in which when the coasting regeneration mode is entered, a throttle valve is fully opened so that the amount of intake air of the engine is maximized, a CVVD target duration is controlled to be maximized, and a closing time of an intake valve is delayed after a start point of time of a compression stroke, thereby decreasing pumping loss of the engine.

Claims11

Dependent claims

A coasting regeneration control method of a vehicle equipped with a continuously variable valve duration (CVVD) engine, in which an engine control unit (ECU) controls regenerative braking in the vehicle, the method comprising the steps of:

determining, by the ECU, whether a current state of the vehicle satisfies coasting regeneration conditions;
and
entering, by the ECU, a coasting regeneration mode and performing regenerative braking when the current state of the vehicle satisfies the coasting regeneration conditions,
wherein when the coasting regeneration mode is entered, a throttle valve is fully opened so that an amount of intake air of the engine is maximized and a CVVD target duration is controlled to be maximized, such that power generation torque of a belt driven motor (BDM) is controlled to be increased.

1 more element

A coasting regeneration control device of a vehicle equipped with a continuously variable valve duration (CVVD) engine, the device comprising:

a data detector detecting in real time information for determining whether a coasting regeneration mode is entered;
an engine control unit (ECU) determining whether the coasting regeneration mode has been entered by analyzing the information provided from the data detector;
and
a CVVD controller controlling a valve duration in the coasting regeneration mode under control of the ECU,
wherein the coasting regeneration mode is entered under control of the ECU when a current state of the vehicle satisfies coasting regeneration conditions as a result of analyzing the information provided from the data detector, and
in the coasting regeneration mode, a throttle valve is fully opened so that an amount of intake air of the engine is maximized under control of the ECU and the CVVD controller controls a CVVD target duration to be maximized, such that power generation torque of a belt driven motor (BDM) is controlled to be increased.

3 more elements

Dependencies are inferred from the claim text.

Coasting Regeneration Control Method and Device of Vehicle with Continuously Variable Valve Duration Engine

Life of this patent

Coasting Regeneration Control Method and Device of Vehicle with Continuously Variable Valve Duration Engine

Life of this patent

Abstract

Claims11