US 10,309,272 B2 · Control method and system for stability of intermediate phase continuously variable valve timing system

Abstract

A control method for stability of an intermediate phase Continuously Variable Valve Timing (CVVT) system may include comparing an oil temperature of the intermediate phase CVVT system with a predetermined value, and interrupting an operation of controlling the CVVT system when the oil temperature is lower than the predetermined value, comparing an engine RPM with a predetermined value, and interrupting the operation of controlling the CVVT system when the engine RPM is lower than the predetermined value, and comparing an operating current of the CVVT system with a predetermined management value A when the operation of controlling the CVVT system is not interrupted.

Claims14

Dependent claims

A control method for stability of an intermediate phase Continuously Variable Valve Timing (CVVT) system, comprising:

comparing an oil temperature of the intermediate phase CVVT system with a predetermined oil temperature value, and interrupting an operation of controlling the CVVT system when the oil temperature is lower than the predetermined oil temperature value;
comparing an engine RPM with a predetermined RPM value, and interrupting the operation of controlling the CVVT system when the engine RPM is lower than the predetermined RPM value;
and
comparing an operating current of the CVVT system with a predetermined management value A when the operation of controlling the CVVT system is not interrupted.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/622,257Filed 14 Jun 2017

Priority

KR 10-2016-008854513 Jul 2016

Published

US 2018/0016951 A118 Jan 2018

Granted

4 Jun 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

F01L 1/3442
Changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear: using hydraulic chambers with variable volume to…
F01L 1/04
Valve drive: by means of cams, camshafts, cam discs, eccentrics or the like
F01L 13/00
Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or
F02D 41/1401
Introducing closed-loop corrections: characterised by the control or regulation method

Control method and system for stability of intermediate phase continuously variable valve timing system

Life of this patent

Control method and system for stability of intermediate phase continuously variable valve timing system

Life of this patent

Abstract

Claims14