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Performance of a Hydrogen-blended Gasoline Direct Injection Engine Under Various Second Gasoline Direct Injection Timings by Changwei Ji; Xiaoyu Cong; Shuofeng Wang; Lei Shi; Teng Su; Du Wang is a Engineering article available to read on EtoBox.

What is Performance of a Hydrogen-blended Gasoline Direct Injection Engine Under Various Second Gasoline Direct Injection Timings about?

The performance of a hydrogen-blended gasoline direct injection engine under various second gasoline direct injection timings is investigated on a modified commercial gasoline direct injection engine. All tests are carried out at a typically congested city-driving condition using lean burn and split gasoline direct injection modes. Results show that under pure gasoline fuel supply mode, brake mean effective pressure, brake thermal efficiency, flame development period, flame propagation period, and maximum in-cylinder pressure vary obviously with various second gasoline direct injection timings and the best second gasoline direct injection timing for engine performance is 130 CAD before top dead center. Blending hydrogen could weaken variations of engine performance related parameters caused by changing second gasoline direct injection timing compared to that under pure gasoline mode. Besides, blending hydrogen could also reduce flame development and propagation periods, and enhance the maximum in-cylinder pressure under the same second gasoline direct injection timing. With hydrogen addition, the coefficient of variations in indicated mean effective pressure drops to less than 1.1%

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Author

Changwei Ji; Xiaoyu Cong; Shuofeng Wang; Lei Shi; Teng Su; Du Wang

Published

2018

Language

EN

Field

Engineering (Physical Sciences)