Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Reciprocating piston type engine

A technology of reciprocating piston and engine, applied in the direction of engine components, combustion engine, engine cooling, etc., can solve the problems of excessive elongation of tension bolts, strong thermal expansion, loss of pre-tightening force of tension bolts, etc., to avoid dew point temperature. Lowering, surface protection, small insulation, small structural weight effect

Inactive Publication Date: 2006-10-25
MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the high heating of the exhaust valve housing, in particular the bearing area assigned to the tensioning bolt, also leads to the resulting strong thermal expansion, which can lead to an excessive extension of the pretensioned tensioning bolt and thus Causes loss of preload on tensioned bolts
As a result, the exhaust valve housing is no longer reliably pressed against the cylinder head, so that so-called air leakage or escape can occur in the bearing and sealing area
The known devices therefore proved to be insufficiently reliable

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
  • Reciprocating piston type engine
  • Reciprocating piston type engine
  • Reciprocating piston type engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The basic structure and principle of operation of two-stroke large diesel engines are known per se, so it is not necessary to explain them in greater detail here. Such an engine generally comprises a plurality of cylinders 1 of the type shown in FIG. 1, to which are each assigned a piston, not shown in more detail here, delimiting a combustion chamber, which is connected via a piston rod to a crosshead, and then The latter cooperates with a crankshaft through a connecting rod.

[0015] The cylinder 1 comprises a cylinder liner 3 on which is mounted a cylinder head 4 which accommodates at least one fuel injector 5 and is provided with a central, stepped recess 6 for supporting an exhaust valve housing 7 . The exhaust valve housing 7 engages with its lower part in the groove 6 and bears with a flange-like bearing surface on the bearing surface 8 on the cylinder head formed by the steps of the groove 6 . In order to achieve sufficient pressing force effective in the regio...

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

In a reciprocating piston engine having at least one cylinder (1) comprising a combustion chamber (2), the cylinder head (4) is provided with an exhaust valve housing (7) comprising a Exhaust passage (13) connected to the combustion chamber (2), which can be closed relative to the combustion chamber by means of a valve cooperating with a valve seat on the exhaust valve housing (13) and a guide device assigned to the valve (14) (19) and the operating device (20), and the exhaust valve housing is fixed on the cylinder head (4) by means of tension bolts (9) passing through the radial protrusions (22) arranged on the circumference, wherein , for the area of ​​the exhaust valve housing (7) embedded in the cylinder head (4) including the valve seat and the area including the guide (19), each is equipped with a cooling channel, preferably annular, into which cooling water can enter (17, 21), a high degree of reliability and a compact construction can be achieved in that the cooling channel (17) configured for the region of the exhaust valve housing (7) embedded in the cylinder head (4) and the Cooling ducts (21) arranged in the area including guides (19) are at least in the area of ​​radial projections (22) in the vicinity of each exhaust duct via at least one radially arranged tensioning bolt (9) ) within the connecting pipeline (23) connected to each other.

Description

technical field [0001] The present invention relates to a reciprocating piston engine, in particular to a two-stroke large diesel engine, which has at least one cylinder including a combustion chamber, and its cylinder head is provided with an exhaust valve housing, which includes an exhaust passage leading to the combustion chamber and closable relative to the combustion chamber by means of a valve cooperating with a seat part on the exhaust valve housing, and a guide and actuating device assigned to the valve, and the exhaust The gas valve housing is fastened to the cylinder head by means of tensioning bolts which pass through radial projections arranged on the circumference, wherein the exhaust valve housing engages in the region of the cylinder head with the valve seat and with the guide. The regions are each assigned a preferably annular cooling channel into which cooling water can enter. Background technique [0002] A device of this type is known from EP0076348 B1. ...

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 Patents(China)
IPC IPC(8): F02F1/38F01P3/14F01L3/18F01L1/38F01P3/02F02B3/06F02B75/02F02F1/36
CPCF02B3/06F02B2075/025F02F1/38F02F2007/0097F01P3/14
Inventor 哈罗·A·赫格
Owner MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com