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Self-resetting single-valve main and auxiliary piston hydraulic drive device and method for pushrod engine

A driving device and self-resetting technology, applied in the direction of engine components, machines/engines, valve devices, etc., can solve the problems of reduced reliability, system complexity, and the inability to take into account the automatic adjustment function of the engine driving function at the same time. The effect of simplifying the overall installation structure

Active Publication Date: 2021-02-12
JIANSU JOINTEK PRECISION MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in order to overcome the fact that the existing engine valve mechanism has a compact structure, it is difficult to arrange the engine hydraulic drive device, and the engine drive function and the valve clearance automatic adjustment function cannot be taken into account at the same time, and the extra reset device will bring The problem of system complexity and reliability reduction, the present invention provides a self-resetting single-valve main and auxiliary piston hydraulic drive device and method for a push rod engine

Method used

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  • Self-resetting single-valve main and auxiliary piston hydraulic drive device and method for pushrod engine
  • Self-resetting single-valve main and auxiliary piston hydraulic drive device and method for pushrod engine
  • Self-resetting single-valve main and auxiliary piston hydraulic drive device and method for pushrod engine

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Experimental program
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Effect test

Embodiment 1

[0092] Such as Figure 1-10 The hydraulic drive device for a self-resetting single-valve main and auxiliary piston for a push rod engine shown includes a rocker arm assembly 100, an integrated cam and push rod assembly 200, an exhaust valve group 300, a valve bridge assembly 400 and a limit assembly 500, The rocker arm assembly 100 includes a rocker arm shaft 170, a rocker arm body 110 and a drive oil circuit 120, the rocker arm shaft 170 is arranged in the rocker arm shaft hole 114, the rocker arm body 110 is rotatably mounted on the rocker arm shaft 170, and the rocker arm body 110 One end is provided with driving main piston 130, and the other end is provided with first elephant foot assembly 140, and driving main piston 130 comprises main piston body 131, and one end of rocking arm body 110 is provided with main piston hole 112, and main piston hole 112 is connected with main piston. The oil passage 121 communicates, and the main piston body 131 is coaxially and slidably a...

Embodiment 2

[0113] Such as Figure 11 Compared with Embodiment 1, the illustrated embodiment 2 differs only in that the auxiliary piston oil passage 122 communicates with the first elephant foot assembly 140, and the valve bridge body 410 is provided with an inner connection passage 411, and the first elephant foot assembly 140 communicates with the driving auxiliary piston 420 through the inner connecting channel 411 , and when the limiting surface 111 is set in contact with the valve bridge body 410 , the limiting surface 111 seals the oil drain channel 430 .

[0114] When the auxiliary piston oil passage 122 passes through the first elephant foot assembly 140, the lubricating oil passage 180 includes a rocker shaft lubricating oil passage 181 and a spray lubricating oil passage 183, and the rocker shaft lubricating oil passage 181 is opened on the rocker shaft 170 , the spray lubricating oil passage 183 is opened on the rocker arm body 110, which includes a spray lubricating section 183a...

Embodiment 3

[0116] In order to reduce the height of the rocker arm assembly 100 on the side of the integrated cam and push rod assembly 200, as Figure 12 Compared with Embodiment 1, the illustrated embodiment 3 differs only in that: the auxiliary piston oil passage 122 is communicated with a second elephant foot assembly 160, and the second elephant foot assembly 160 is arranged on the rocker arm body 110, and Located directly above the oil drain passage 430, the second elephant foot assembly 160 can be threaded or fixedly arranged on the rocker arm body 110 in the present invention. When the lower end of the second elephant foot assembly 160 contacts the valve bridge body 410, the second elephant foot assembly 160 Two elephant foot assemblies 160 are communicated with the oil drain passage 430, and the second elephant foot assembly 160 used in the present embodiment is an existing rocking arm elephant foot.

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Abstract

The invention relates to a self-resetting single-valve main and auxiliary piston hydraulic drive device and method for a push rod engine. A main driving piston and a driving auxiliary piston are respectively arranged on a rocker arm body and a valve bridge body, and the driving auxiliary piston is connected to an exhaust valve. , the drive oil circuit is connected to the drive main piston, the drive auxiliary piston and the drive control valve; when the drive control valve opens the drive oil circuit: the drive main piston and the drive auxiliary piston realize hydraulic linkage, and the rocker arm body and valve bridge do not move during the drive lift. Drive the auxiliary piston to open the exhaust valve; when the main lift starts, the main piston body oil circuit and the auxiliary piston oil circuit are disconnected, and the driving auxiliary piston automatically resets; when the driving oil circuit is disconnected: during the integrated cam driving lift process, the main The piston absorbs the driving lift of the rocker arm body from the integrated cam and push rod assembly, the rocker arm body does not move, and the driving lift of the integrated cam is not transmitted to the side of the exhaust valve; the invention has simple principle, compact structure, easy optimization, and improves Reliability and durability of engine-driven operation.

Description

technical field [0001] The invention relates to the technical field of side cam engines, in particular to a hydraulic drive device and method for a self-resetting single-valve main and auxiliary piston for a push rod engine. Background technique [0002] The concept and operation of compression release engine brakes is well known in the heavy commercial vehicle industry. Cost, power, reliability and engine change requirements are often factors in determining whether engine braking will be employed. Several different types of compression-release engine brakes exist in practical applications, among which the valve train integrated engine brake system has become more popular due to its low cost, high performance and reliability, and compact structure. [0003] One approach to engine braking system integration is to incorporate actuated valve lift into positive power cams and include "loose" devices in the valvetrain to hide or inhibit the braking lift of the valves from actuat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18F01L1/24F01L1/344F01L1/46
CPCF01L1/183F01L1/2422F01L1/3442F01L1/46F01L2001/34426
Inventor 崔立澜
Owner JIANSU JOINTEK PRECISION MASCH CO LTD
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