Compression tests methods on car engines
Journal Title: Scientific Bulletin, Automotive Series - Year 2017, Vol 27, Issue 1
Abstract
Correct operation of the internal combustion engine requires the best possible seal of the combustion chamber during the period when the valves are closed. A perfect seal of the combustion chamber can not be achieved because of the constructional features of the segments as well as the play between the piston and the cylinder. In time, the wear of moving parts leads to a continuous worsening of the seal. Different complexity and accuracy methods are used to measure the combustion chamber's leakage. In this article, the following methods of measuring the engine cylinder leakage are presented: measuring the pressure in the cylinder at the end of the compression process using a compression gauge, measuring the current drawn by the starter motor, comparing engine speeds when the engine is cranked over by the starter and comparing engine speeds on idle. The paper presents the comparative analysis of the values obtained by different methods with the cold engine compared to the hot engine and a comparative analysis between the results obtained by using the different methods of measuring the engine cylinder leakage. The paper demonstrates that measuring the pressure using a compression gauge is the most accurate method for determining the leakage of the combustion chamber.
Authors and Affiliations
M. F. TOMA, D. A. MICU, Cristian NIcolae ANDREESCU, C IOTA
Keywords
Related Articles
- EP ID EP288830
- DOI 10.26825/bup.ar.2017.010
- Views 31
- Downloads 0
Mathematical method for studying passenger flows in Craiova Municipality public transport system
Public transport in general contributes to cleaner air and better quality of life in cities and reduces greenhouse gas (GHG) emissions. For this is important that the public transport system to be very well analysed in r...
Research using advanced engineering methods concerning automotive waste disposal in road traffic and transport specialized unit from Cluj-Napoca
Waste management problem in daily life and especially in automotive sector is one of the main concerns in relation with pollution issue. The most important aspect consists in how are disposed different materials from car...
The influence of the suspension upon the axle weight distribution for heavy trucks
Due to the increasing number of heavy trucks, the number of the overweight trucks have increased, and most of them, were recorded with axle overweight. This may lead to fines for the transportation companies, and to the...
Algorithm and numerical calculation of undetermined static reactions to the plan articulated quadrilateral mechanism with straight bars
This paper represents the numerical calculation of the undetermined static reactions to the planar plane quadrilateral mechanism with straight bars and kinematic rotation couplers. The algorithm used was obtained using t...
Contributions in developing advanced engineering methods for researching the N.V.H. aspects in Porsche Cayman operation conditions at Technical University from Cluj- Napoca
Noise is one of the most important parameter that influences the artificial and especially automotive pollution. Developing new motor vehicles, widely known as cars, respectively their auxiliary systems is now difficult...