Valve lift control device with cylinder deactivation

Patent metadata

Field	Value
Publication number	US-2016061069-A1
Application number	US-201514828932-A
Country	US
Kind code	A1
Filing date	Aug 18, 2015
Priority date	Sep 3, 2014
Publication date	Mar 3, 2016
Grant date	—

Abstract

Methods and systems are provided for a valve lift control device. In one example, a method may include rotating an adjusting camshaft of the valve lift control device in order to adjust a valve lift of one or more cylinders.

First claim

1 . A method, comprising:
adjusting a valve lift of a cylinder via an adjusting camshaft on a first side of an activation lever and a camshaft on a second side of the activation lever, the adjusting camshaft comprising radially offset cams such that each valve of a cylinder is individually adjusted based on an engine load.

2 . The method of claim 1 , wherein rotating the adjusting camshaft in a first direction increases an angular position of the activation lever.

3 . The method of claim 2 , wherein rotating the adjusting camshaft in a second direction decreases the angular position of the activation lever, where the second direction is opposite the first direction.

4 . The method of claim 3 , further comprising increasing the valve lift in response to increasing the angular position of the activation lever and decreasing the valve lift in response to decreasing the angular position.

5 . The method of claim 1 , wherein the adjusting camshaft comprises a maximum radial effect and a minimum radial effect.

6 . The method of claim 5 , wherein the maximum radial effect corresponds with a maximum angular position of the activation lever and fully rotating the adjusting camshaft in a first direction.

7 . The method of claim 6 , wherein the minimum radial effect corresponds with a minimum angular position of the activation lever and fully rotating the adjusting camshaft in a second direction.

8 . The method of claim 7 , wherein the first direction is clockwise and the second direction is counterclockwise.

9 . The method of claim 7 , wherein the first direction is counterclockwise and the second direction is clockwise.

10 . A system, comprising:
a first camshaft and second camshaft on opposite sides of an activation lever; the first camshaft comprising a plurality of cams; and the second camshaft comprising a plurality of radially misaligned cams, wherein each cam corresponds to an individual activation lever of a single cylinder of an engine; wherein
the second camshaft is rotated in order to adjust an angular position of the activation lever and a position of a valve of the cylinder.

11 . The system of claim 10 , wherein the first camshaft applies a deflection force against the activation lever, wherein the deflection force is counter to a force applied by the second camshaft to the activation lever.

12 . The system of claim 10 , wherein the activation lever is physically coupled to a second lever, where the second lever is adjusted based on an adjustment of the angular position of the activation lever.

13 . The system of claim 12 , wherein the second lever is coupled to a valve of the cylinder, wherein the valve is adjusted corresponding to an adjustment of the second lever.

14 . The system of claim 10 , wherein the cams of the second camshaft are radially aligned when the angular position of the activation lever is a maximum angular position or a minimum angular position.

15 . The system of claim 14 , wherein the maximum angular position corresponds to a maximum valve lift of a valve of the cylinder and the minimum angular position corresponds to a minimum valve lift of the valve of the cylinder.

16 . The system of claim 10 , wherein the camshaft and the second camshaft are mechanically operated via a crankshaft, electrically operated via signals from a controller, or a combination thereof.

17 . The system of claim 10 , wherein the radially misaligned cams change the angular positions of corresponding activation levers unequally such that each of the corresponding activation levers is at a different angular position.

18 . The system of claim 10 , wherein the second camshaft is rotated in a first direction to increase the angular position of the activation lever and increase a valve lift of a valve of the cylinder, and the second camshaft is rotated in a second direction, opposite the first direction, to decrease the angular position of the activation lever and decrease a valve lift of the valve of the cylinder.

19 . A valve lift control device, comprising:
a first camshaft and a second camshaft on opposite sides of an activation lever, where the second camshaft comprises radially offset cams able to apply unequal radial effects to the activation lever for a rotation of the second camshaft between a rotational range of the second camshaft.

Assignees

• Ford Global Tech Llc

Inventors

• Grosch Guenter Hans
• Lach Rainer
• Bonse Joerg

Classifications

• F01L2001/467

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• F01L2305/00

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