Light Emission Behavior of Radicals during Preflame Reactions under Knocking Operation

Format:

Book

Conference/Event

Author/Creator:

KASHIWAGI, Hideaki, author.

Conference Name:

Small Engine Technology Conference & Exposition (2002-10-29 : Kyoto, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Tokyo, JAPAN Society of Automotive Engineers of Japan 2002

Summary:

Knocking is one phenomenon that can be cited as a factor impeding efforts to improve the efficiency of spark-ignition engines. With the aim of understanding knocking better, light emission spectroscopy was applied in this study to examine preflame reactions that can be observed prior to autoignition. Light emission intensity was measured at wavelengths of 306.4 nm (characteristic spectrum of OH), 329.8 nm (HCO), 395.2 nm (HCHO). A four-cycle, air-cooled, single-cylinder gasoline engine with a side valve arrangement was used as the test engine. Light emission behavior was simultaneously observed at two positions (the end zone and the center zone) in the combustion chamber. The test fuel used was n-heptane (0 RON). The test engine was operated at three speed levels (1400, 1800 and 2200 rpm). As a result, preflame reactions were observed. It was also observed that the tendencies seen for the preflame reaction interval varied depending on the engine speed

Notes:

Vendor supplied data

Publisher Number:

2002-32-1775

Access Restriction:

Restricted for use by site license