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

• US 10,082,119 B2
• Filed: 08/04/2016
• Issued: 09/25/2018
• Est. Priority Date: 10/12/2015
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Dae-Woon
• Primary Examiner(s): Kwon, John
• Assistant Examiner(s): Hoang, Johnny H
• Application Number:
  US15/228,033
• Publication Number:
  US 20170101974A1
• Time in Patent Office: 782 Days
• Field of Search: 1231791, 1231794, 12317925
• CPC Class Codes: F02N 11/00 Starting of engines by means of electric motors
• CPC Class Codes: F02N 11/003 said electric motor being also used as a drive for auxiliaries, e.g. for driving transmission pumps or fuel pumps during engine stop
• CPC Class Codes: F02N 11/02 the motors having longitudinally-shiftable rotors
• CPC Class Codes: F02N 11/0803 characterised by means for initiating engine start or stop F02N11/0814 takes precedence
• CPC Class Codes: F02N 11/0814 comprising means for controlling automatic idle-start-stop
• CPC Class Codes: F02N 11/0848 with means for detecting successful engine start, e.g. to stop starter actuation
• CPC Class Codes: F02N 11/0851 characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
• CPC Class Codes: F02N 15/022 the starter comprising an intermediate clutch
• CPC Class Codes: F02N 15/06 the toothed gears being moved by axial displacement
• CPC Class Codes: F02N 15/062 Starter drives
• CPC Class Codes: F02N 15/067 the starter comprising an electro-magnetically actuated lever
• CPC Class Codes: F16F 15/264 Rotating balancer shafts F16F15/262 takes precedence

Abstract

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.

Claims

1. A motor assembly for starting an engine and driving a balance shaft, comprising:

a motor configured to rotate 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 other end of the motor shaft;

an actuator configured to axially move the motor shaft in a forward or backward direction; and

a ring gear configured to engage with the start gear so as to transfer the rotational force of the motor shaft to the engine,

wherein when the motor shaft is axially moved forward, the start gear is engaged with the ring gear and the clutch is disengaged from the balance shaft so as not to driven by the motor shaft, and

when the motor shaft is axially moved backward, the start gear is disengaged from the ring gear and the clutch is engaged with the balance shaft to be driven by the motor shaft.

2. The motor assembly of claim 1, wherein the motor is a permanent magnetic AC motor with a vector control function.

3. The motor assembly of claim 1, wherein the balance shaft is not connected to a crankshaft of the engine.

4. The motor assembly of claim 1, wherein the actuator is a shift actuator.

5. The motor assembly of claim 1, wherein the ring gear is arranged within a transmission.