The present disclosure relates generally to a rocker arm assembly for use in a valve train assembly and more particularly to a carrier that has an integrated engine brake and oil paths formed thereon.
Compression engine brakes can be used as auxiliary brakes, in addition to wheel brakes, on relatively large vehicles, for example trucks, powered by heavy or medium duty diesel engines. A compression engine braking system is arranged, when activated, to provide an additional opening of an engine cylinder's exhaust valve when the piston in that cylinder is near a top-dead-center position of its compression stroke so that compressed air can be released through the exhaust valve. This causes the engine to function as a power consuming air compressor which slows the vehicle.
In a typical valve train assembly used with a compression engine brake, the exhaust valve is actuated by a rocker arm which engages the exhaust valve by means of a valve bridge. The rocker arm rocks in response to a cam on a rotating cam shaft and presses down on the valve bridge which itself presses down on the exhaust valve to open it. It is difficult to route oil for use in engine brake operation and lubrication in limited space.
The background description provided herein is for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent it is described in this background section, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present disclosure.
An oil supply carrier assembly configured to be mounted to a valve train carrier having a plurality of rocker arms according to the present disclosure includes an oil supply carrier housing having a first oil inlet port and a second oil inlet port. The oil supply carrier housing supports an oil control valve and further includes first, second and third oil supply passages. The first oil supply passage is configured to deliver oil from the first oil inlet port on the valve train carrier to the oil control valve. The second oil supply passage is configured to deliver oil from the valve train carrier to at least one engine brake rocker arm of the rocker arms. The third oil supply passage is configured therein to deliver oil from the second oil inlet port to the rocker arms.
According to additional features, the first oil supply passage is collectively defined by a first oil bore and a second oil bore formed along intersecting non-linear axes. The first oil bore is fluidly connected to the first oil inlet port. The second oil bore is fluidly connected to the oil control valve. The oil supply carrier housing can further define at least one mounting bore that receives a corresponding rocker arm of the plurality of rocker arms. The second oil supply passage is fluidly connected to the at least one mounting bore.
In other features, the second oil passage is collectively defined by a first oil pathway, a second oil pathway and a third oil pathway. The second oil supply passage delivers oil to a first engine brake rocker arm and a second engine brake rocker arm. The at least one mounting bore comprises a first and third mounting bore that receive an engine brake rocker arm thereat and a second and fourth mounting bore that receive a non-engine brake rocker arm thereat. The first, second, third and fourth mounting bores are alternately arranged on the oil supply carrier wherein the second oil supply passage delivers oil to the first and second engine brake rocker arms while bypassing the second mounting bore.
According to still other features, the third oil supply passages are defined by a first lubrication line. The first lubrication line accepts oil at the first inlet port and communicates oil to outlets defined at both of a first and a second mounting bore of the at least one mounting bores. The third oil supply passages are further defined by a second lubrication line. The second lubrication line accepts oil at the second inlet port and communicates oil to outlets defined at both of a third and a fourth mounting bore of the at least one mounting bores.
In other features, the oil supply carrier housing is unitary. The oil supply carrier housing includes mounting surfaces arranged thereon that support the respective rocker arms thereon. The mounting surfaces can be concave.
An oil supply carrier assembly configured to be mounted to a valve train carrier having a plurality of rocker arms including first and second engine brake rocker arms and first and second non-engine brake rocker arms. The oil supply carrier assembly comprises an oil supply carrier housing having a first oil inlet port, a second oil inlet port, a first mounting bore that mounts the first engine brake rocker arm, a second mounting bore that mounts the first non-engine brake rocker arm, a third mounting bore that mounts the second engine brake rocker arm, and a fourth mounting bore that mounts the second non-engine brake rocker arm. The oil supply carrier housing supports an oil control valve. The oil supply carrier includes a first, second and third oil supply passage. The first oil supply passage is configured therein to deliver oil from the first oil inlet port on the valve train carrier to the oil control valve. The second oil supply passage is configured therein to deliver oil from the valve train carrier to the first and second engine brake rocker arms. The third oil supply passage is configured therein to deliver oil from the second oil inlet port to the first and second engine brake rocker arms and the first and second non-engine brake rocker arms.
According to other features, the first oil supply passage is collectively defined by a first oil bore and a second oil bore formed along intersecting non-linear axes. The first oil bore is fluidly connected to the first oil inlet port. The second oil bore is fluidly connected to the oil control valve. The second oil passage is collectively defined by a first oil pathway, a second oil pathway and a third oil pathway. The second oil supply passage delivers oil to a first engine brake rocker arm and a second engine brake rocker arm. The first, second, third and fourth mounting bores are alternately arranged on the oil supply carrier wherein the second oil supply passage delivers oil to the first and second engine brake rocker arms while bypassing the second mounting bore.
According to other features, the third oil supply passages are defined by a first lubrication line, wherein the first lubrication line accepts oil at the first inlet port and communicates oil to outlets defined at both of a first and a second mounting bore of the at least one mounting bores. The third oil supply passages are further defined by a second lubrication line, wherein the second lubrication line accepts oil at the second inlet port and communicates oil to outlets defined at both of a third and a fourth mounting bore of the at least one mounting bores. The oil supply carrier housing is unitary. The oil supply carrier housing can include mounting surfaces arranged thereon that support the respective rocker arms thereon.
The present disclosure will become more fully understood from the detailed description and the accompanying drawings, wherein:
With initial reference to
The valve train carrier 12 supports first rocker arms 22 and second rocker arms 24. The second rocker arms 24 are configured as engine brake rocker arms and are identified individually as first and second engine brake rocker arms 24A and 24B. Oil supply carrier assemblies 30 are mounted to the valve train carrier 12. The oil supply carrier assemblies 30 each include an oil supply carrier housing 32 (
With particular reference to
Mounting bores 60A-60D are defined through the oil supply carrier housing 32. The first and third mounting bores 60A and 60C mounts the first and second engine brake rocker arms 24A, 24B. The second and fourth mounting bores 60B and 60D mounts the first and second non-engine brake rocker arms 22. The second oil passage 52 is fluidly connected to the mounting bores 60A and 60C for delivering oil to the respective first and second engine brake rocker arms 24A and 24B. The third oil passages 54 terminate at outlets 70A-70D. The oil supply carrier housing 32 can further include mounting surfaces 80A-80D formed thereon. The mounting surfaces 80A-80D can be generally concave to support respective rocker arms 22, 24.
With continued reference to
With continued reference to
With continued reference to
Returning now to
The foregoing description of the examples has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular example are generally not limited to that particular example, but, where applicable, are interchangeable and can be used in a selected example, even if not specifically shown or described. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
This application is a continuation of International Application No. PCT/EP2019/025154 filed May 23, 2019, which claims the benefit of U.S. Provisional Application No. 62/675,998 filed May 24, 2018, the contents of which are incorporated herein by reference thereto.
Number | Name | Date | Kind |
---|---|---|---|
4653441 | Belsanti | Mar 1987 | A |
4940048 | Mills | Jul 1990 | A |
20110067673 | Yoon | Mar 2011 | A1 |
20170276035 | Cecur et al. | Sep 2017 | A1 |
20190178118 | Cecur | Jun 2019 | A1 |
20200056514 | Ting | Feb 2020 | A1 |
Number | Date | Country |
---|---|---|
201539283 | Aug 2010 | CN |
102287247 | Dec 2011 | CN |
104975898 | Oct 2015 | CN |
204783159 | Nov 2015 | CN |
105351400 | Feb 2016 | CN |
107100686 | Aug 2017 | CN |
102010045755 | Nov 2011 | DE |
20110032212 | Mar 2011 | KR |
2011157051 | Dec 2011 | WO |
2015120897 | Aug 2015 | WO |
Entry |
---|
Translation of CN 204783159 (Nov. 2015). |
International Search Report and Written Opinion for International Application No. PCT/EP2019/025154 dated Oct. 30, 2019. |
Chinese OA for CN Application No. 201980046755.6 dated Mar. 2, 2022. |
Chinese Office Action for CN Application No. 201980046755.6 dated Dec. 1, 2022. |
Number | Date | Country | |
---|---|---|---|
20210071552 A1 | Mar 2021 | US |
Number | Date | Country | |
---|---|---|---|
62675998 | May 2018 | US |
Number | Date | Country | |
---|---|---|---|
Parent | PCT/EP2019/025154 | May 2019 | US |
Child | 17100890 | US |