Supercharge Your Innovation With Domain-Expert AI Agents!

Latch assembly, latch device and rocker arm

A latching device, latching technology, applied in valve devices, engine components, machines/engines, etc., can solve the problems of unusable rocker arm function, response time limitation, etc.

Pending Publication Date: 2022-06-07
EATON INTELLIGENT POWER LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The response time of the device limits the implementation of VVA
If the device does not lock and unlock quickly, the rocker arm will not function as the engine speed increases beyond the device's response time

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
  • Latch assembly, latch device and rocker arm
  • Latch assembly, latch device and rocker arm
  • Latch assembly, latch device and rocker arm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Reference will now be made in detail to the illustrated examples in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0019] The present disclosure provides systems and apparatus for adding ventilation to a latch mechanism. The latch assembly 100 may constitute a vented latch mechanism for a hydraulically actuated switching rocker arm 300 or other variable valve train component. The latch assembly 100 is designed to allow for improved response time of the latch pin 10 . The non-circular latch retainer 30 increases the flow area 260 exposed to atmospheric pressure, thereby improving switching performance.

[0020] An optimized latch pin 10 response time may be achieved for switched rocker arm 300 engine applications with low available pressure. The rocker arm 300 may be configured such as Figure 3A latched state shown as well as Figure 3B toggles between the unlatched...

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 latch assembly includes a latch pin and a cage. The latch pin includes a latch nose and a pin body. The pin body includes an outer surface and an inner compartment. The inner compartment includes a first inner wall divided by a first slot and a second inner wall divided by a second slot. The first slot and the second slot exit from the inner compartment. The cage includes a stepped base and a shaft extending from the stepped base into the inner compartment. The shaft includes a first outer flat portion abutting the first inner wall and a second outer flat portion abutting the second inner wall. A spring may be biased against the latch pin and the cage. The latch assembly may be used in a latch device of a valve mechanism, such as a switching roller finger follower or other rocker arm.

Description

technical field [0001] The present application provides a latch assembly that can be installed in a latch arrangement of a valve train, such as a rocker arm. Background technique [0002] The valve train may include switchable components for implementing variable valve actuation (VVA), such as idle, increased motion, and the like. One such valve train component is the rocker arm. A rocker arm, such as a switched roller finger follower (SRFF), may include means for locking and unlocking relative movement of the rocker arm's components. The response time of this device limits the implementation of VVA. If the unit does not lock and unlock quickly, the rocker arm's function cannot be used when the engine speed increases beyond the unit's response time. Therefore, it is desirable to have quick actuation for locking and unlocking valve train components. SUMMARY OF THE INVENTION [0003] The methods and apparatus disclosed herein overcome the aforementioned disadvantages and...

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): F01L1/18F01L13/00
CPCF01L1/185F01L2001/186F01L2013/105F01L2013/001F01L2305/00F01L13/0005F01L2303/00F01L2810/02F01L1/2416F01L1/34
Inventor J·R·布朗M·A·万斯
Owner EATON INTELLIGENT POWER LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com