Engine Valve Seat and Insert Wear

1989 ◽  
Author(s):  
R. van Diesel ◽  
G. C. Barber ◽  
J. M. Larson ◽  
S. L. Narasimhan
Keyword(s):  
Author(s):  
Vijay Srivatsan ◽  
Bartosz Powałka ◽  
Reuven Katz ◽  
John Agapiou

This paper presents a methodology for the inspection of geometric features on an internal combustion engine valve seat. Inspection of valve seat geometry using a high-precision non-contact range sensor is investigated. A method that can extract the cone angle, the valve seat length and the roundness of the cone surface has been presented. In-line implementation requires a methodology to analyze data from a minimum number of parallel cross sectional profiles of the valve seat. An in-line valve seat inspection prototype machine with two axes of motion that utilizes the method presented in this paper is presented. Validation of the method on several valve seat samples shows a high degree of repeatability, and the results are comparable to coordinate measurement machine measurements of the same samples.


1993 ◽  
Vol 57 (10) ◽  
pp. 1114-1122 ◽  
Author(s):  
Kouji Tanaka ◽  
Takashi Saito ◽  
Yoshio Shimura ◽  
Kazuhiko Mori ◽  
Minoru Kawasaki ◽  
...  

2011 ◽  
Vol 335-336 ◽  
pp. 552-555
Author(s):  
Zhi De Huang

Microstructure and properties of Forging high Cr cast iron were investigated according to the requirements for production and application of engine valve seat. It is found that the microstructure of Forging high Cr cast iron consists of tempering martensite, M7C3 carbide and austenite. The strength ,and plasticity and hardness of Forging high Cr cast iron after heat treating is higher than that of centrifugal casting high Cr cast iron. So the Forging high Cr cast iron can meet the application demand of the engine valve seat.


2012 ◽  
Vol 482-484 ◽  
pp. 1759-1762 ◽  
Author(s):  
Wei Ying Piao ◽  
Yi Bao Yuan ◽  
Tao Sun ◽  
Lei Wang

The difficulty of measuring the run-out of engine valve seat related to the centerline of the valve guide is the determination of the datum axis. A method that the gauge was fixed on the conical surface of the valve seat was chosen. One sensor on the conical surface of the gauge measures the run-out of the valve seat related to the centerline of the gauge. Another two sensors of the gauge measures the centerline of the valve guide. The mathematic model of measurement is established, the run-out of the valve seat related to the centerline of the valve guide can be archived.


Wear ◽  
1996 ◽  
Vol 201 (1-2) ◽  
pp. 15-25 ◽  
Author(s):  
Y.S. Wang ◽  
S. Narasimhan ◽  
J.M. Larson ◽  
J.E. Larson ◽  
G.C. Barber

Materia Japan ◽  
1994 ◽  
Vol 33 (4) ◽  
pp. 429-431 ◽  
Author(s):  
Kazuhiko Mori ◽  
Hiroyuki Murase ◽  
Minoru Kawasaki ◽  
Takashi Saito ◽  
Yoshio Shimura

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