Embedded-component-type actuator and continuously variable valve duration system, and valve train system formed thereby
AssigneeHyundai Kefico Corporation
InventorLae-Kyeom Kim
Life of this patent
Estimating the term…
Abstract
An embedded-component-type actuator is provided. The actuator includes an output shaft that is rotated, a planetary gear set that forms an overlapping section coaxially with the output shaft, and a motor that is coupled to the overlapping section of the planetary gear set. A sensing controller detects a rotation angle of the output shaft. The output shaft passes an actuator housing and the planetary gear set, the motor, and the sensing controller are arranged in series, thus minimizing a package. Additionally, the actuator is applied as the power source of a CVVD system to improve mountability to a complex engine room due to the space occupancy minimization.
Claims18
An actuator, comprising:
- a planetary gear set that forms an overlapping section with an output shaft being rotated;
- a motor that forms a concentric section coupled to the overlapping section to be arranged in series with the planetary gear set and that forms a fixed section with the output shaft;
- and
- a sensing controller configured to detect a rotation angle of the output shaft behind the motor.
A continuously variable valve duration system, comprising:
- an actuator including an output shaft being rotated, a planetary gear set that forms an overlapping section with the output shaft being a concentric shaft, a motor coupled to the overlapping section of the planetary gear set to be disposed behind the planetary gear set, a sensing controller configured to detect a rotation angle of the output shaft behind the motor, a housing bracket with the output shaft that passes therethrough and the planetary gear set coupled thereto, and a housing cover coupled to the motor to accommodate the sensing controller;
- a control shaft connected to the actuator, and rotated from a short-side to a long-side or from the long-side to the short-side as an operating angle of the actuator;
- and
- a valve lifter configured to adjust a rotational speed of a cam shaft by the control shaft moving the valve lifter.
A valve train system, comprising:
- a continuously variable valve duration (CVVD) system configured to adjust a rotational speed of a cam shaft by operating an actuator to be a CVVD actuator that rotates at operating angles of a short-side and a long-side using the actuator as a power source, the actuator including an output shaft being rotated, a planetary gear set that forms an overlapping section with the output shaft being a concentric shaft, a motor coupled to the overlapping section of the planetary gear set to be disposed behind the planetary gear set, a sensing controller configured to detect a rotation angle of the output shaft behind the motor, a housing bracket with the output shaft that passes therethrough and the planetary gear set coupled thereto, and a housing cover coupled to the motor to accommodate the sensing controller;
- and
- a continuously variable valve timing (CVVT) system using a CVVT actuator configured to directly operate the cam shaft, as a power source.
Dependencies are inferred from the claim text.