Hydraulic tappet and valve timing system

A hydraulic tappet and plunger technology, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve problems such as valve opening and seating noise, and achieve the effect of preventing or reducing noise without affecting normal functions.

Inactive Publication Date: 2019-01-11
SCHAEFFLER TECH AG & CO KG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because there is no high-pressure oil in the high-pressure chamber 11 of the hydraulic tappet 10 after the engine has been shut down for a long time. When the engine is started in this situation, the valve 20 will be opened abnormally, causing the valve to open and seat noise (for example, the valve 20 and the valve knocking noise between seats 30)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydraulic tappet and valve timing system
  • Hydraulic tappet and valve timing system
  • Hydraulic tappet and valve timing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present invention, but are not intended to exhaust all possible ways of the present invention, nor are they intended to limit the scope of the present invention.

[0030] refer to Figure 2A with Figure 2B , An embodiment of the present invention provides a hydraulic tappet 100 , which includes a housing 110 , a plunger 120 , a return spring 130 , and a one-way valve 140 . The housing 110 is substantially cylindrical with a bottom, and the axially lower portion 121 of the plunger 120 is inserted into the housing 110 from the opening of the housing 110 , so that the axially lower portion 121 of the plunger 120 and the axially lower portion of the housing 110 A high pressure chamber 150 is defined between (including the bottom) 111 . ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a hydraulic tappet and a valve timing system comprising the hydraulic tappet. The hydraulic tappet comprises a shell, a plunger and a one-way clutch device arranged between theplunger and the shell, the one-way clutch device is constructed to be capable of being switched between a locking state and an unlocking state, under the locking state, the one-way clutch device allows the plunger to further extend outwards from the shell to restrain the plunger to further extend inwards into the shell; and in the unlocking state, the one-way clutch device allows the plunger to further extend inwards into the shell and further extend outwards from the shell. According to the hydraulic tappet and the valve timing system comprising the hydraulic tappet, when an engine is startedafter a long-time halt, the one-way clutch device maintains in the locking state, the hydraulic tappet cannot be compressed suddenly by a rocker arm, and noise generated by a valve mechanism can be prevented or relived. When the engine works normally, the one-way clutch device is actuated to release the locking state, and normal functions of the hydraulic tappet are not affected.

Description

technical field [0001] The invention relates to a gas distribution system of a vehicle, in particular to a hydraulic tappet and a valve timing system comprising the hydraulic tappet. Background technique [0002] figure 1 A partial assembly of a conventionally designed valve timing system is schematically shown. When the engine works normally, the high-pressure chamber 11 and the storage chamber 12 of the hydraulic tappet 10 are always filled with hydraulic oil. Noise is generated when the engine is started after the engine has been shut down for an extended period (eg, greater than 24 hours). This is because there is no high-pressure oil in the high-pressure chamber 11 of the hydraulic tappet 10 after the engine has been shut down for a long time. When the engine is started in this situation, the valve 20 will be opened abnormally, causing the valve to open and seat noise (for example, the valve 20 and the valve There will be impact noise between the seats 30). Content...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/16F01L1/245
CPCF01L1/16F01L1/245F01L2810/04
Inventor 钱其伟郭文萍田雪松
Owner SCHAEFFLER TECH AG & CO KG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap