Continuous variable valve timing control device and control method therefor

Patent metadata

Field	Value
Publication number	US-2017037745-A1
Application number	US-201615299115-A
Country	US
Kind code	A1
Filing date	Oct 20, 2016
Priority date	May 15, 2014
Publication date	Feb 9, 2017
Grant date	—

Abstract

A continuously variable valve timing (CVVT) control device is provided. The CVVT control device includes an engine controlling unit (ECU) configured to output an actual phase angle and a target phase angle of an intake valve or an exhaust valve. The CVVT control device further includes an intellectual motor controller configured to receive the actual phase angle and the target phase angle from the ECU through digital communication in a vehicle. A driving current is generated for adjusting an output torque of a motor based on a phase deviation between the received actual phase angle and target phase angle.

First claim

1 . A continuously variable valve timing (CVVT) control device for combustion engines, comprising:
a motor configured to provide a driving source and adjust a relative rotation speed of the motor with respect to a rotation speed of a camshaft of a combustion engine, wherein the camshaft includes a rotational phase that is configured to shift with respect to a crankshaft and adjust a valve timing of an intake valve or an exhaust valve; an engine controlling unit (ECU) configured to output an actual phase angle and a target phase angle of the intake valve or the exhaust valve; and an intellectual motor controller configured to receive the actual phase angle and the target phase angle from the ECU through digital communication in a vehicle and generate a driving current to adjust an output torque of the motor based on a phase deviation between the received actual phase angle and target phase angle.

2 . The CVVT control device of claim 1 , wherein the digital communication includes at least one selected from the group consisting of: local interconnect network (LIN) communication, controller area network (CAN) communication, FlexRay communication, MOST communication, Ethernet communication, 2-wire serial communication, and 4-wire serial communication.

3 . The CVVT control device of claim 2 , wherein the serial communication includes at least one selected from the group consisting of: EIA-485, TIA/EIA-485, RS-485, EIA-422, TIA-422, and RS-422.

4 . The CVVT control device of claim 1 , further comprising: a communication bus coupled to the ECU to the intellectual motor controller through the digital communication in the vehicle,
wherein the communication bus includes at least one selected from a group consisting of: a local interconnect network (LIN) communication bus, a controller area network (CAN) communication bus, a FlexRay communication bus, a MOST communication bus, an Ethernet communication bus, and a serial communication bus.

5 . The CVVT control device of claim 1 , wherein the intellectual motor controller comprises:
a receiver configured to receive by the intelligent motor controller, the actual phase angle and the target phase angle output from the ECU through the digital communication in the vehicle; a subtractor configured to calculate by the intelligent motor controller, a phase deviation between the actual phase angle and the target phase angle; a duty value calculator configured to calculate by the intelligent motor controller, a torque value of the crankshaft based on the calculated phase deviation and calculate a duty value that corresponds to the calculated torque value; and a motor driver configured to output a driving current that corresponds to the calculated duty value to the motor.

6 . The CVVT control device of claim 5 , wherein the receiver includes at least one selected from a group consisting of: a LIN communication receiver, a CAN communication receiver, a FlexRay communication receiver, a MOST communication receiver, an Ethernet communication receiver, and a serial communication receiver.

7 . The CVVT control device of claim 1 , wherein the intellectual motor controller is disposed on a surface of a housing configuring an external appearance of the motor and is implemented as one body with the motor.

8 . A continuously variable valve timing (CVVT) control device for combustion engines, comprising:
a motor configured as a driving source that adjusts a relative rotation speed of the motor with respect to a rotation speed of a camshaft of a combustion engine, wherein the camshaft is configured to adjust a rotation phase based a crankshaft to adjust a valve timing of an intake valve or an exhaust valve; an engine controlling unit (ECU) configured to output a target phase angle of the intake valve or the exhaust valve; and an intellectual motor controller configured to receive the target phase angle from the ECU through digital communication in a vehicle, calculate an actual phase angle by using a crank angle signal received from a crankshaft position sensor sensing a rotation speed of the crankshaft and a cam angle signal received from a camshaft position sensor sensing the rotation speed of the camshaft, and generate a driving current for controlling an output torque of the motor by using a phase deviation between the received target phase angle and the calculated actual phase angle.

9 . The CVVT control device of claim 8 , wherein the digital communication includes at least one selected from a group consisting of: local interconnect network (LIN) communication, controller area network (CAN) communication, FlexRay communication, MOST communication, Ethernet communication, 2-wire serial communication, and 4-wire serial communication.

10 . The CVVT control device of claim 8 , further comprising: a communication bus that connect the ECU to the intellectual motor controller through the digital communication in the vehicle,
wherein the communication bus includes at least one selected from a group consisting of: a local interconnect network (LIN) communication bus, a controller area network (CAN) communication bus, a FlexRay communication bus, a MOST communication bus, an Ethernet communication bus, and a serial communication bus.

11 . The CVVT control device of claim 8 , wherein the intellectual motor controller includes,
an actual phase angle calculator configured to calculate the actual phase angle from a time difference between an edge of a specific pulse of the crank angle signal and an edge of a specific pulse of the cam angle signal; a receiver configured to receive the target phase angle output from the ECU through the digital communication in the vehicle; a subtractor configured to calculate the phase deviation between the target phase angle, received from the receiver, and the actual phase angle calculated by the actual phase angle calculator; a duty value calculator configured to calculate a torque value of the crankshaft based on the calculated phase deviation and calculate a duty value that correspond to the calculated torque value; and a motor driver configured to output a driving current that corresponds to the calculated duty value to the motor.

12 . The CVVT control device of claim 11 , wherein the receiver includes at least one selected from a group consisting of: a LIN communication receiver, a CAN communication receiver, a FlexRay communication receiver, a MOST communication receiver, an Ethernet communication receiver, and a serial communication receiver.

13 . A control method of a continuously variable valve timing (CVVT) control device for combustion engines comprising:
adjusting a relative rotation speed of a motor used as a driving source with respect to a rotation speed of a camshaft of a combustion engine to shift a rotation phase of the camshaft with respect to a crankshaft; adjusting a valve timing of an intake valve or an exhaust valve; receiving, by an intellectual motor controller, an actual phase angle and a target phase angle of the intake valve or the exhaust valve from an engine controlling unit (ECU) through digital communication in a vehicle, the intellectual motor controller being implemented as one body with the motor; and generating, by the intellectual motor controller, a driving current for adjusting an output torque of the motor based on a phase deviation between the received actual phase angle and target phase angle.

14 . The control method of claim 13 , wherein in the receiving, the digital communication includes at least one selected from a group consisting of: local interconnect network (LIN) communication, controller area network (CAN) communi

Assignees

• Hyundai Kefico Corp

Inventors

• Baek Jin Wook
• Kim Nam Kyu
• Lee Jong Rim
• Cho Kyoung Ho

Classifications

• F01L2013/103

  Electric motors · CPC title

• F01L1/34

  characterised by the provision of means for changing the timing of the valves without changing the duration of opening {and without affecting the magnitude of the valve lift} · CPC title

• H04L12/413

  with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD] · CPC title

• F02D13/02 Primary

  during engine operation · CPC title

• F02D13/0219

  by shifting the phase, i.e. the opening periods of the valves are constant · CPC title