ROCKER ARM

• US 20200131948A1
• Filed: 07/07/2018
• Published: 04/30/2020
• Est. Priority Date: 07/07/2017
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Inventors: Cecur, Majo
• Granted Patent: US 11,248,501 B2
• Time in Patent Office: Days
• CPC Class Codes: F01L 1/185 Overhead end-pivot rocking arms
• CPC Class Codes: F01L 1/2405 by means of a hydraulic adjusting device located between the cylinder head and rocker arm
• CPC Class Codes: F01L 1/267 with means for varying the timing or the lift of the valves
• CPC Class Codes: F01L 13/0005 Deactivating valves
• CPC Class Codes: F01L 2001/186 Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
• CPC Class Codes: F01L 2013/001 Deactivating cylinders
• CPC Class Codes: F01L 2013/103 Electric motors
• CPC Class Codes: F01L 2305/00 Valve arrangements comprising rollers
• CPC Class Codes: F01L 2800/08 Timing or lift different for valves of different cylinders
• CPC Class Codes: F01L 31/08 Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear

Abstract

A dual body rocker arm for controlling a valve of a cylinder of an internal combustion engine includes: a first body; a second body; and a latching arrangement moveable to latch and unlatch the first body and the second body. The latching arrangement includes: a latch pin moveable between a first position in which the latch pin latches the first body and the second body together and a second position in which the first body and the second body are un-latched; and a lever mounted for pivotal motion relative to the first body, a first end of the lever contacting the latch pin, and a second end of the lever configured to contact an actuation arrangement. In use, when the actuation arrangement exerts a force on the second end of the lever, the lever pivots such that the first end of the lever exerts a force on the latch pin.

Claims

1. :

A dual body rocker arm for controlling a valve of a cylinder of an internal combustion engine, the rocker arm comprising;

a first body;

a second body; and

a latching arrangement moveable to latch and unlatch the first body and

the second body,

the latching arrangement comprising;

a latch pin moveable between a first position in which the latch pin latches the first body and the second body together and a second position in

which the first body and the second body are un-latched; and

a lever mounted for pivotal motion relative to the first body, a

first end of the lever contacting the latch pin, and a second end

of the lever configured to contact an actuation arrangement;

wherein, in use, when the actuation arrangement exerts a force on the

second end of the lever, the lever is configured to pivot such that the first end

of the lever exerts a force on the latch pin, thereby to move the latch

pin from the first position to the second position.

2. :

The dual body rocker arm according to claim 1, wherein the lever is arranged to orient the latch pin rotationally with respect to the first body.

3. :

The dual body rocker arm according to claim 2, wherein the second end of the lever defines a protrusion, and the latch pin defines a transverse slot into which the protrusion is received, thereby to orient the latch pin rotationally with respect to the lever.

4. :

The dual body rocker arm according to claim 1, wherein the rocker arm comprises a torsional biasing device supported by the first body and arranged to bias the second body relative to the first body, and

wherein the lever is mounted on a portion of the torsional biasing device for pivotal motion relative to the first body.

5. :

The dual body rocker arm according to claim 1, wherein the second body is connected to the first body for pivoting movement relative to the first body about a pivot axis, and

wherein the latching arrangement is at an opposite side of the rocker arm to the pivot axis.

6. :

The dual body rocker arm according to claim 1, wherein the latching arrangement comprises a biasing element configured to bias the latch pin towards the first position.

7. :

The dual body rocker arm according to claim 1, wherein, the dual body rocker arm is configured for cylinder deactivation.

8. :

The dual body rocker arm according to claim 7, wherein, in use, the rocker arm provides cylinder deactivation when the latch pin is in the second position.

9. :

A valve train assembly of an internal combustion engine, comprising;

the dual body rocker arm according to claim 1;

and

the actuation arrangement.

10. :

The valve train assembly according to claim 9, wherein the actuation arrangement comprises a shaft rotatable by an actuation source, the shaft comprising a cam configured to control the latching arrangement.

11. :

The valve train assembly according to claim 9, wherein the actuation arrangement comprises an actuator comprising a solenoid and a body moveable relative to and by the solenoid, to control the latching arrangement.