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- W1539704328 abstract "In reciprocating internal combustion engines, the piston stops in a moment at top dead center (TDC), so there exists a necessary time to proceed combustion. However more slowing piston motion around TDC, does it have a possibility to produce the following effects? The slowed piston motion may expedite combustion proceed and increase cylinder pressure. This may lead to an increase of degree of constant volume. As a result, thermal efficiency may be improved. In order to verify this idea, two types of engines were tested. The first engine attained high cylinder pressure as expected. The P-V diagram formed an almost ideal Otto cycle. However, this did not contribute to the improvement in the thermal efficiency. Then the second engine with further slower piston motion by active piston control was tested in order to examine the above reason. It was revealed that the increased heat loss cancelled out all other favorable features such as lower pumping loss and increase in dearee of constant volume." @default.
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- W1539704328 date "2004-09-27" @default.
- W1539704328 modified "2023-10-16" @default.
- W1539704328 title "A Trial of Improving Thermal Efficiency by Active Piston Control -Speed Control Effect of Combustion Chamber Volume Variation on Thermal Efficiency-" @default.
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- W1539704328 doi "https://doi.org/10.4271/2004-32-0080" @default.
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