Valve train assembly

Patent metadata

Field	Value
Publication number	US-10590809-B2
Application number	US-201715799188-A
Country	US
Kind code	B2
Filing date	Oct 31, 2017
Priority date	May 7, 2015
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A valve train assembly having a valve train carrier including a body having a cartridge cavity formed in the body, a hydraulic lash adjuster adjustment (HLA) assembly, and a cartridge removably disposed in the cartridge cavity. The cartridge includes a main body defining an inner bore, wherein the HLA assembly is disposed in the inner bore, and the cartridge is sized and shaped for insertion into the cartridge cavity formed in an underside of the valve train carrier. The cartridge is configured to have a valve train lash set prior to insertion into the cartridge cavity. A rocker arm assembly includes a body configured to engage the hydraulic lash adjustment (HLA) assembly, an end having a socket formed therein, and an e-foot extending through the socket and coupled to the end, the e-foot configured to maintain substantially flat contact with a top surface of an engine valve.

First claim

What is claimed is:

1. A valve train carrier for a valve train assembly, the valve train carrier comprising:
a body having a top surface and a bottom surface;
a left bank configured to operably connect to at least one exhaust rocker arm assembly associated with an exhaust valve, wherein the left bank is configured to operably connect to four exhaust rocker arm assemblies, and wherein the left bank is configured to operably connect to two standard position exhaust rocker arm assemblies and two cylinder deactivation (CDA) position exhaust rocker arm assemblies;
a right bank configured to operably connect to at least one intake rocker arm assembly associated with an intake valve, wherein the right bank is configured to operably connect to four intake rocker arm assemblies, and wherein the right bank is configured to operably connect to two standard position intake rocker arm assemblies and two CDA position intake rocker arm assemblies; and
a cartridge cavity configured to receive a modular cartridge that houses a hydraulic lash adjustment (HLA) assembly.

2. The valve train carrier of claim 1 , wherein the cartridge cavity is formed in the body bottom surface such that the modular cartridge is inserted into the cavity from below the body.

3. The valve train carrier of claim 1 , further comprising two oil control valve apertures formed in the body configured to each receive an oil control valve.

4. A rocker arm assembly for a valve train assembly, the rocker arm assembly comprising:
a body configured to engage a hydraulic lash adjustment (HLA) assembly;
a first end having a roller;
a second end having a socket formed therein, the socket including a hemispherical contact surface; and
an e-foot extending through the socket and coupled to the second end, the e-foot configured to maintain substantially flat contact with a top surface of an engine valve;
wherein the e-foot includes a hemispherical body and a post extending therefrom, the hemispherical body configured to ride the hemispherical contact surface;
wherein the post extends through a slot the socket, the slot configured to guide and restrain movement of the e-foot; and
wherein the post is coupled to the body by at least one of staking and a clip.

5. The rocker arm assembly of claim 4 , wherein the body includes a pair of lateral flanges connected by a connecting plate, the socket being formed in the connecting plate;
a recess formed in the connecting plate configured to mate with a spigot of the HLA assembly, the recess and spigot forming a fulcrum about which the rocker arm assembly can rotate;
wherein the body further includes a bridge coupled between the lateral flanges opposite the connecting plate.

6. The rocker arm assembly of claim 5 , wherein the lateral flanges each include an aperture to receive an axle of the roller.

7. A cartridge for a valve train carrier of a valve train assembly, the cartridge comprising:
a main body defining an inner bore configured to receive and house a hydraulic lash adjustment (HLA) assembly; and
a first latch flange extending outwardly from the main body, the first latch flange defining a first latch bore having a first latch assembly configured to selectively engage the HLA assembly,
wherein the cartridge is sized and shaped for removable insertion into a cartridge cavity formed in an underside of the valve train carrier, the cartridge configured to have a valve train lash set prior to insertion into the cartridge cavity.

8. The cartridge of claim 7 , wherein the cartridge is fabricated from iron or steel.

9. The cartridge of claim 8 , wherein the cartridge is fabricated from cast iron and graphite.

10. The cartridge of claim 7 , further comprising an upper flange extending upwardly from the main body, the upper flange partially defining the inner bore.

11. The cartridge of claim 10 , further comprising a lower flange extending downwardly from the main body, the lower flange partially defining the inner bore.

12. The cartridge of claim 7 , further comprising a fluid port configured to receive a hydraulic fluid from the valve train carrier and supply the hydraulic fluid to the HLA assembly.

13. The cartridge of claim 7 , further comprising a second latch flange extending outwardly from the main body, the second latch flange defining a second latch bore having a second latch assembly configured to selectively engage the HLA assembly;
wherein the first latch assembly is disposed opposite the second latch assembly; and
wherein the first and second latch flanges define an upper surface configured to contact the valve train carrier and distribute loads in the valve train assembly.

14. The cartridge of claim 7 , wherein the first latch assembly is selectively movable between a first position and a second position by selectively supplying a hydraulic fluid to the first latch assembly.

15. The cartridge of claim 7 , wherein the first latch assembly is selectively movable between a first position and a second position by a solenoid.

16. The cartridge of claim 13 , wherein the first latch assembly includes a first latch pin and a first pin biasing mechanism configured to bias the first latch pin into engagement with the HLA assembly to prevent relative movement between the cartridge and the HLA assembly; and
wherein the second latch assembly includes a second latch pin and a second latch pin biasing mechanism configured to bias the second latch pin into engagement with the HLA assembly to further prevent relative movement between the cartridge and the HLA assembly.

17. The cartridge of claim 7 , wherein the latch flange further includes a latch pin orientation feature configured to maintain alignment of a latch pin shelf when the latch assembly is in a retracted position.

18. The cartridge of claim 15 , wherein the solenoid is an electro-mechanical device.

19. The cartridge of claim 18 , wherein the solenoid is configured to directly couple to the valve train carrier.

20. The cartridge of claim 15 , wherein the solenoid is directly coupled to the valve train carrier.

21. The cartridge of claim 17 , wherein the first latch assembly includes a first latch pin extending through an aperture formed in the latch pin orientation feature.

22. The cartridge of claim 21 , wherein the first latch pin includes a flat surface, and the aperture includes a flat portion, the flat surface and the flat portion facilitating preventing rotation of the first latch pin within the aperture.

23. The cartridge of claim 22 , wherein the latch pin orientation feature is coupled to the latch flange in a desired angular orientation to subsequently dispose a shelf of the latch pin in a desired orientation to selectively engage a groove shoulder of the HLA assembly.

24. The cartridge of claim 15 , wherein the latch pin orientation feature defines a notch.

25. The cartridge of claim 24 , further comprising a retention bolt inserted through the notch and into the latch flange to couple the latch pin orientation feature to the latch flange.

26. The cartridge of claim 15 , wherein the latch pin orientation feature is welded to the latch flange.

27. The cartridge of claim 15 , wherein the latch pin orientation feature is disposed within a recess formed in an outer surface of the latch flange.

28. The cartridge of claim 27 , wherein the latch pin orientation feature is flush with the latch flange

Assignees

• Eaton Corp

Inventors

• Yankovic Eric John
• Cecur Majo
• Mcfadden Debra Lynn
• Radulescu Andrei Dan
• Spoor Anthony Leon
• Wright Douglas

Classifications

• F01L1/182 Primary

  the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft · CPC title

• F01L1/2405

  by means of a hydraulic adjusting device located between the cylinder head and rocker arm · CPC title

• F01L2305/00

  Valve arrangements comprising rollers · CPC title

• F01L2301/00

  Using particular materials · CPC title

• F01L2810/02

  Lubrication · CPC title