US 10,927,724 B2Granted

Rocker arm assembly

AssigneeEaton Corporation

InventorsDouglas J. Nielsen, James E. McCarthy, Jr., Kshamta Bishnoi, Kiran Bairy, Majo Cecur

Life of this patent

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Abstract

A valve train assembly includes a first exhaust valve, a second exhaust valve, and a valve bridge including a main body and a lever rotatably coupled to the main body, the main body configured to engage the first exhaust valve, and the lever configured to engage the second exhaust valve. An exhaust valve rocker arm assembly is configured to selectively open the first and second exhaust valves, the exhaust valve rocker arm assembly including an exhaust valve rocker arm with a hydraulic lash adjuster (HLA) assembly coupled thereto, the HLA assembly in contact with the valve bridge main body. An engine brake rocker arm assembly is configured to selectively open the second exhaust valve and including an engine brake rocker arm with a combined HLA and added motion capsule coupled thereto. The combined HLA and added motion capsule is configured to selectively engage and rotate the lever.

Claims14

Dependent claims

A valve train assembly comprising:

a first exhaust valve;
a second exhaust valve;
a valve bridge including a main body and a lever rotatably coupled to the main body, the main body configured to engage the first exhaust valve, and the lever configured to engage the second exhaust valve;
an exhaust valve rocker arm assembly configured to selectively open the first and second exhaust valves, the exhaust valve rocker arm assembly including an exhaust valve rocker arm with a hydraulic lash adjuster (HLA) assembly coupled thereto, the HLA assembly in contact with the valve bridge main body;
and
an engine brake rocker arm assembly configured to selectively open the second exhaust valve and including an engine brake rocker arm with a lost motion capsule coupled thereto, the lost motion capsule configured to selectively engage and rotate the lever to open the second exhaust valve;
wherein the lost motion capsule is configured to move between an activated position and a deactivated position;
wherein in the activated position, the lost motion capsule acts as a rigid body configured to transfer motion from the engine brake rocker arm to the lever to thereby rotate the lever and open the second exhaust valve;
wherein in the deactivated position, the lost motion capsule is configured to collapse when the lost motion capsule contacts the lever so as to absorb the motion of the engine brake rocker arm;
and
wherein the lost motion capsule comprises an outer body, a plunger, a latching mechanism, and a ball pivot.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/154,184Filed 8 Oct 2018 · continuation in part
Priority: IN 2016110122877 Apr 2016
Published: US 2019/0040769 A17 Feb 2019
Granted: 23 Feb 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F01L 13/065
For braking: compression release engine retarders of the "Jacobs Manufacturing" type
F01L 1/182
Centre pivot rocking arms: the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
F01L 1/2416
By fluid means, e.g. hydraulically: by means of a hydraulic adjusting device attached to an articulated rocker
F01L 1/267
Characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with…

Family

Application62/430,102Us provisional application · filed 5 Dec 2016
PCT/US2017/026541Parent of this continuation-in-part · filed 7 Apr 2017
Application62/568,852Us provisional application · filed 6 Oct 2017
US 2019/0040769 A1Pre-grant publication · published 7 Feb 2019
US 10,927,724 B2This patent

From the US filing history. Foreign family members aren’t listed.