Effects of Hydrogen Addition to SI Engine on Knock Behavior

Document Number: 2004-01-1851

Date Published: June 2004

Author(s):
Tomohiro Shinagawa - Toyota Motor Corporation
Takeshi Okumura - Toyota Motor Corporation
Shigeo Furuno - Toyota Motor Corporation
Kyoung-Oh Kim - Toyota Motor Corporation

Abstract:
In an SI engine, increasing the compression ratio could be one means of achieving higher thermal efficiency. However, when the compression ratio is increased, knock occurs and it prevents higher thermal efficiency. It is generally known that if the burning velocity is increased and the combustion period is shortened, the occurrence of knock may be suppressed. Here, hydrogen was added to the gasoline engine as a means of increasing the burning velocity. As a result, it has been confirmed that the occurrence of knock could be controlled to some extent, and knock could be completely avoided depending on the conditions for the distribution of hydrogen. Furthermore, it became clear that this result might have originated not only by the increase in the burning velocity but also by the hindrance of radical production by the hydrogen.

File Size: 534K
Product Status: In Stock

Included in: SP-1888

See other papers presented at 2004 SAE Fuels & Lubricants Meeting & Exhibition, June 2004, Toulouse, FRANC, Session: Mixture Preparation, Combustion & Emission Formation Processes in SI Engines (Part A&B)

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