Improved diesel engine piston

A diesel engine and piston technology, which is applied in the field of diesel engines, can solve the problems of pulling, burning, and knocking on the sliding surface, so as to avoid the effect of knocking the cylinder.

Inactive Publication Date: 2008-10-08
NINGBO C S I POWER & MASCH GRP CO LTD
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] figure 1 It is a structural schematic diagram of an existing diesel engine piston, the longitudinal profile 1 of the piston head and the longitudinal profile 3 of the piston skirt are straight lines, figure 2 The horizontal axis X in the center represents the axis of the piston pin, and the vertical axis Y represents the cross-sectional profile of the piston skirt. The existing piston skirt profile 7 is a circular curve. The piston designed with this structure, when the piston starts to work , due to the low tempera...

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
  • Improved diesel engine piston
  • Improved diesel engine piston

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] Example: such as figure 1 Shown, a kind of improved diesel engine piston comprises piston head 11 and piston skirt 22, and the cross-section of piston head 11 and piston skirt 22 is all approximately ellipse, and piston skirt 22 is processed as minor axis along The direction of the piston pin axis, the long axis is along the direction perpendicular to the piston pin axis, such as figure 2 As shown, the cross-sectional profile 8 of the piston skirt 22 is also approximately an elliptical profile; the longitudinal profile 2 of the piston head 11 is a stepped line, the longitudinal profile of the piston skirt 22 is also a stepped profile, and the longitudinal profile of the piston skirt 22 It includes the short-axis profile 4 of the piston skirt and the long-axis profile 5 of the piston skirt.

[0013] The longitudinal profile 2 of the piston head 11 is a two-stage stepped line, and the short-axis profile 4 of the piston skirt and the long-axis profile 5 of the piston ski...

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 discloses an improved piston of a diesel engine, which comprises a piston head and a piston skirt. The vertical molded line of the piston head is a staircase curve while the vertical molded line of the piston skirt is also a staircase curve. The invention has the advantages that the piston is regularly distorted when being operated in the diesel engine and according to the distortion, the molded line structures of the piston head and the piston skirt are improved so as to ensure that such failures as napping, burning, etc. are not easy to occur on the sliding surfaces of the piston head and the piston skirt; in different operating modes, from cold starting to full load even in the overloading operation, the piston of the diesel engine can maintain the optimum clearance with a cylinder, thus effectively avoiding the occurrences of problems, such as piston knocking, cylinder seizing, etc.

Description

technical field [0001] The invention relates to a diesel engine, in particular to a piston whose profile is improved to improve its reliability and durability. Background technique [0002] The piston of a diesel engine reciprocates in the cylinder, which is one of the parts with the most severe working conditions in the piston engine. The working reliability and durability of the diesel engine are largely related to the working conditions of the piston. [0003] figure 1 It is a structural schematic diagram of an existing diesel engine piston, the longitudinal profile 1 of the piston head and the longitudinal profile 3 of the piston skirt are straight lines, figure 2 The horizontal axis X in the center represents the axis of the piston pin, and the vertical axis Y represents the cross-sectional profile of the piston skirt. The existing piston skirt profile 7 is a circular curve. The piston designed with this structure, when the piston starts to work , Due to the low temp...

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
IPC IPC(8): F02F3/00F16J1/00
Inventor 冯立泉娄华吴杰
Owner NINGBO C S I POWER & MASCH GRP CO LTD
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