Hyundai Motor Company

Kia Motors Corporation

Dae-Woon Kim

Jun-Ho Park

Hyuk Im

Hong-Wook Lee

Jin-Kwon Kim

Il-Joong Hwang

Dong-Chune Hong

Hyun-Jun Lim

A method for sensing damage of bearing of engine using a vibration signal may include separating a vibration signal of an engine sensed by a vibration sensor installed at one side of the engine of a vehicle into a vibration signal by combustion knocking and a vibration signal of a bearing installed between a crank pin and a connecting rod; extracting, by a signal processing filter, a signal of a predetermined natural frequency band from the vibration signal of the bearing; determining whether the vibration signal of the bearing is higher than a predetermined bearing damage threshold, in a predetermined engine state condition in order to sense breakage of the bearing during operation of the engine; and confirming that the bearing has been damaged.

Method for sensing damage of bearing of engine using vibration signal

A method of controlling a motor assembly for starting an engine and driving a balance shaft includes: determining whether starting or restarting of an engine is desired; operating an actuator such that a motor shaft is moved forward when the starting or restarting of the engine is desired; and starting or restarting the engine by rotating a motor and by driving a start gear, after the operating the actuator.

Motor assembly for starting engine and driving balance shaft and method of controlling the same

A method for detecting a damaged-bearing in an engine using a vibration signal may include: separating, by a controller, a vibration signal of the engine detected by a vibration detecting device installed on one side of the engine of a vehicle into a vibration signal caused by combustion knocking and a vibration signal generated in a bearing, extracting a signal in a predetermined natural frequency band from the vibration signal generated in the bearing using a band-pass filter, and processing the extracted signal to a quantified bearing signal using the controller, and comparing the quantified bearing signal with a preset damaged-bearing criterion using the controller to determine whether the quantified bearing signal is equal to or higher than the preset damaged-bearing criterion to determine a damage to the bearing.

Method for detecting damaged-bearing in engine using vibration signal

A motor assembly for starting an engine and driving a balance shaft may include: a motor for rotating a motor shaft which is axially movable; a clutch attached to one end of the motor shaft so as to transfer or block rotational force of the motor shaft; a balance shaft rotated by the rotational force of the motor shaft transferred through the clutch so as to reduce vibration generated by an engine; a start gear attached to the other end of the motor shaft; and an actuator for axially moving the motor shaft in a forward or backward direction.

The line control arrangement includes a valve timing controller generating a predetermined valve timing variable control signal according to an engine speed of a vehicle; and an oil controlling driver generating a rotational force in a predetermined direction according to the valve timing variable control signal received from the valve timing controller to form a corresponding advance line and a corresponding retard line. The line control arrangement for a continuously variable valve timing system reduces noise generated by operation of an oil controlling driver.

Growing community of inventors

Anyang-si, South Korea

Dae-Woon Kim