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- Title
Effective release energy, residual gas, and engine emission characteristics of a V-twin engine with various exhaust valve closing timings.
- Authors
Khoa, Nguyen Xuan; Lim, Ock Teack
- Abstract
This article presents a study for determining the effective release energy, residual gas, and peak firing pressure rise of a V-twin engine with various exhaust valve timings. The effect of exhaust valve closing timing (EVCT) on effective release energy, peak firing pressure rise, residual gas, engine performance, and engine emission are completely discussed for the first time. Results show that EVCT had a significant effect on residual gas, peak firing pressure rise, and effective release energy. When the EVCT increased from 10 deg to 90 deg ATDC, the residual gas ratio increased from 0.2 % to 1.7 %. The peak firing pressure rise and effective release energy increased until reaching maximum values of 4.59 bar/deg and 0.64 kJ, respectively, and decreased as the EVCT continued to increase. The engine performed at its optimal efficiency when the EVCT was at 50 deg ATDC. The maximum brake mean effective pressure was 7.74 bar, the minimum brake specific fuel consumption was 399.35 g/kWh, and the maximum engine brake torque was 16.92 Nm. The minimum NOx emission was 7.54 g/kWh at a 30 deg ATDC of EVCT.
- Subjects
VALVES; ENERGY consumption; ENGINES; GASES
- Publication
Journal of Mechanical Science & Technology, 2020, Vol 34, Issue 1, p477
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-019-1245-6