Studies on the measuring method of the total friction loss of internal combustion engines

Mitsuhiro Soejima, Yutaro Wakuri, Tatsumi Kitahara, Yoshito Ejima, Yasuhiko Nakata

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In the present study a new test method is investigated to measure the total friction loss of engines over the whole range of speed and load. It is based on the idea that the friction loss close to the true one of fired and braked engines can be measured by the run-out method because the temperature mainly influencing the friction loss is almost stable for the short run-out test duration. From the test results and the comparison with those measured by other conventional test methods, the following becomes evident: 1. (1) The total friction mean effective pressure slightly increases as the revolution speed becomes high, but it decreases as either the load or the cooling water temperature becomes high. 2. (2) The total friction mean effective pressure measured by the present method is smaller than that measured by the run-out method, the motoring method or Willans-line method, but it is larger than that measured by the indicated pressure diagram method.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalJSAE review
Volume15
Issue number2
DOIs
Publication statusPublished - Apr 1994

All Science Journal Classification (ASJC) codes

  • Automotive Engineering

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