Controller of variable valve apparatus of internal combustion engine and variable valve system of internal combustion engine
US-9523295-B2 · Dec 20, 2016 · US
System and method for preventing sticking of continuous variable valve timing locking-pin
US9540967B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9540967-B2 |
| Application number | US-201414558683-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 2, 2014 |
| Priority date | Sep 4, 2014 |
| Publication date | Jan 10, 2017 |
| Grant date | Jan 10, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
A method of preventing sticking of a CVVT locking pin includes a condition determining step that determines whether a CVVT operation condition is satisfied, an locking-pin unlocking step that unlocks a locking-pin before the CVVT is operated, and a CVVT operating step that operates the CVVT, and a system for preventing sticking of a CVVT locking pin.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of preventing sticking of a CVVT locking-pin, the method comprising: a condition determining step that determines, by a determiner, whether a CVVT operation condition is satisfied in accordance with an engine condition; a locking-pin unlocking step that unlocks, by a controller, the CVVT locking-pin which is installed to a CVVT by applying an electric signal to a solenoid valve before the CVVT is operated; an unlocking determining step that determines, by the determiner, whether the CVVT locking-pin has been fully unlocked, by comparing a time lapsing from a point of time when an electric signal is applied to the solenoid valve with a standard value; and a CVVT operating step that operates, by the controller, the CVVT when the CVVT locking-pin has been fully unlocked. 2. The method of claim 1 , wherein the unlocking determining step determines, by the determiner, that the CVVT locking-pin has been fully unlocked, when the time lapsing from the point of time when the electric signal to the solenoid valve is larger than the standard value. 3. A system for preventing sticking of a CVVT locking-pin, comprising: a determiner that determines whether a CVVT operation condition is satisfied in accordance with an engine condition; a controller that unlocks the CVVT locking-pin which is installed to a CVVT by applying an electric signal to a solenoid valve before the CVVT is operated when the CVVT operation condition is satisfied; a calculator that measures a time lapsing from a point of time when the electric signal is applied to the solenoid valve for unlocking the CVVT locking-pin, and compares the time lapsing from the time when the electric signal is applied to the solenoid valve with a standard value; and a storage that stores the standard value for determining whether the CVVT locking-pin has been fully unlocked, wherein the determiner determines that the CVVT locking-pin has been fully unlocked, when the time lapsing from the point of time when the electric signal is applied to the solenoid valve is larger than the standard value, and wherein the controller operates the CVVT when the CVVT-locking pin has been fully unlocked.
Assignees
Inventors
Classifications
changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear · CPC title
Mechanical Engineering · mapped topic
- F01L9/04Primary
Mechanical Engineering · mapped topic
- F01L1/3442Primary
using hydraulic chambers with variable volume to transmit the rotating force · CPC title
- F01L9/20Primary
by electric means · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9540967B2 cover?
- A method of preventing sticking of a CVVT locking pin includes a condition determining step that determines whether a CVVT operation condition is satisfied, an locking-pin unlocking step that unlocks a locking-pin before the CVVT is operated, and a CVVT operating step that operates the CVVT, and a system for preventing sticking of a CVVT locking pin.
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd, Kia Motors Corp
- What technology area does this patent fall under?
- Primary CPC classification F01L9/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 10 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).