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

• US 10,641,225 B2
• Filed: 08/10/2018
• Issued: 05/05/2020
• Est. Priority Date: 10/12/2015
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• 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:
  US16/100,380
• Publication Number:
  US 20180347529A1
• Time in Patent Office: 634 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 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.

Claims

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

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;

starting or restarting the engine by rotating a motor and by driving a start gear, after the operating the actuator;

stopping the operation of the actuator such that the motor shaft is moved backward when the starting or restarting of the engine is undesired;

after the stopping operation of the actuator, determining whether an RPM of the engine is less than a predetermined target RPM; and

driving a balance shaft by rotating the motor when the RPM of the engine is equal to or higher than the predetermined target RPM.

2. The method of claim 1, wherein, in the operating the actuator, a clutch is disengaged while the start gear is engaged with a ring gear.

3. The method of claim 1, wherein, in the stopping operation of the actuator, a clutch is engaged while the start gear is disengaged from a ring gear.