Thermodynamic and experimental determinations of knock intensity by using a spark-ignited rapid compression machine
✍ Scribed by Michikata Kono; Seiichi Shiga; Seiichiro Kumagai; Kazuo Iinuma
- Book ID
- 103041711
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 908 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0010-2180
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✦ Synopsis
By use of thermodynamic theory, the intensity of engine knock was calculated in terms of the energy of gas vibration which occurs when the end gas ignites spontaneously. In the theory, it is assumed that the gas vibration energy originates from the difference between displacement works of two types of burned gases which are produced by the flame propagation and the spontaneous ignition processes. Results of the theory were successfully verified by the experiment by using a spark-ignited rapid compression machine. In the experiment, the energy of gas vibration accompanied by knock was determined by application of the FFF method to the pressure record. The agreement between theoretical and experimental results suggests that in order to give a general validity to the knock intensity, it is reasonable to use the vibration energy as a quantitative measure.