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System comprising an accumulator upstream of a lost motion component in a valve bridge

An accumulator, lost motion technology, applied in the direction of engine components, valve devices, machines/engines, etc., can solve the problems of high valve train load, short refill time, performance loss, etc.

Active Publication Date: 2016-12-14
JACOBS VEHICLE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when operating at high engine speeds, the refill times shown may be short
As such, the pressure and flow of hydraulic fluid may not be sufficient to actuate the lost motion component 130, which in turn may result in a loss of performance or a high load on the valve train

Method used

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  • System comprising an accumulator upstream of a lost motion component in a valve bridge
  • System comprising an accumulator upstream of a lost motion component in a valve bridge
  • System comprising an accumulator upstream of a lost motion component in a valve bridge

Examples

Experimental program
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Embodiment Construction

[0028] Now refer to image 3 , which shows a valve actuation system 300 according to the invention. As shown, system 300 includes valve actuation motion source 110 described above operatively connected to motion receiving end 312 of rocker arm 310 . The rocker arm 310 also includes a motion transfer end 314 . A hydraulic fluid supply 360 is in fluid communication with the rocker arm 310 . System 300 also includes a valve bridge 320 operably connected to two or more engine valves 140 . The valve bridge 320 may include a lost motion component 330 as is known in the art of bridge braking systems.

[0029] Although image 3 Not shown in , but rocker arm 310 is typically supported by a rocker shaft, and rocker arm 310 reciprocates about the rocker shaft. Also, the rocker shaft may contain elements of the hydraulic fluid supply 360 in the form of hydraulic fluid passages formed along the length of the rocker shaft, as is known in the art. The motion receiving end 312 may comprise ...

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PUM

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Abstract

Systems for actuating at least two engine valves comprise a valve bridge operatively connected to the at least two engine valves and having a hydraulically-actuated lost motion component. The lost motion component comprises a lost motion check valve disposed therein. A rocker arm has a motion receiving end configured to receive valve actuation motions from a valve actuation motion source and a motion imparting end for conveying the valve actuation motions and hydraulic fluid to the lost motion component. The rocker arm is in fluid communication with a hydraulic fluid supply. The systems also comprise an accumulator in fluid communication with the hydraulic fluid supply and disposed upstream of the lost motion check valve. In all embodiments, a fluid supply check valve may be disposed upstream of the accumulator and configured to prevent flow of hydraulic fluid from the accumulator back to the hydraulic fluid supply.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 024,629, filed July 15, 2014, entitled "Valve Bridge With Integrated Lost Motion System," the teachings of which are incorporated by reference in their entirety incorporated into this application. [0003] This application is also related to co-pending application, entitled "Bias Mechanisms For A Rocker Arm And Lost Motion Component Of A Valve Bridge," (Attorney Docket No. 46115.00 .0062), and a co-pending application titled "Pushrod Assembly" (Attorney Docket No. 46115.00.0064), both of which were filed on the same date. technical field [0004] The present application relates generally to actuating one or more engine valves in an internal combustion engine, and more particularly to valve actuation including lost motion systems. Background technique [0005] It is known in the art that valve actuation in internal combustion engines controls t...

Claims

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Application Information

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IPC IPC(8): F01L13/00F01L9/02F01L1/18F01L9/10
CPCF01L1/181F01L1/20F01L13/06F01L13/065F01L2800/10F01L1/146F01L1/18F01L1/26F01L1/46F01L9/10F01L1/2422
Inventor J·巴尔特鲁基G·M·格龙B·陆
Owner JACOBS VEHICLE SYST
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