Abstract: In this study, an electro-mechanical valve (EMV) system for the intake valve of a four stroke, single cylinder, overhead valve and spark ignition (SI) engine was designed and constructed. An engine with the EMV system and a standard engine were tested to observe the effects of the EMV on engine performance and emissions at different speeds under full load. The EMV engine showed improved engine power, engine torque and break specific fuel consumption (BSFC). A 66% decrease in CO emissions was also obtained with the EMV system, but hydrocarbons (HC) and NOx emissions increased by 12% and 13% respectively.
Key words: Semi electro-mechanic, Camless engine, Electro-mechanic engine valve, Engine performance, Emissions
doi:10.1631/jzus.A0900119 Document code: A CLC number: TH13
1.Introduction
All internal combustion engines (ICE) have mechanically actuated systems for opening intake and exhaust valves. Traditional valve systems have con-stant valve timing which restricts engine performance especially at low and at high engine speeds. Control-ling valve operation in ICE’s effective method for improving engine performance and emissions over a range of engine speeds. Parameters such as cam shape, valve timing, valve opening duration and valve lifting have a major impact on engine performance and emissions (Barkan and Dresner, 1989; Krauter et al., 1992; Hatano et al., 1993; Cinar, 1998; Akba, 2000; Pischinger et al., 2000; Stein et al., 1995).
摘要: 在這項(xiàng)研究中, 對(duì)于一個(gè)四沖程，單缸，架空進(jìn)氣閥機(jī)電閥門系統(tǒng) 閥門和火花點(diǎn)火（SI）的發(fā)動(dòng)機(jī)設(shè)計(jì)和建造。根據(jù)對(duì)同一個(gè)標(biāo)準(zhǔn)的EMV系統(tǒng)和發(fā)動(dòng)機(jī)引擎進(jìn)行測(cè)試，以觀察在不同的速度下，滿載對(duì)發(fā)動(dòng)機(jī)性能和排放影響的EMV標(biāo)準(zhǔn)。EMV的引擎表明改善發(fā)動(dòng)機(jī)的功率、發(fā)動(dòng)機(jī)扭矩那么燃油消耗將有很大改善。在EMV的工作條件下，CO排放量減少66％，，但碳?xì)浠衔铮℉C）和氮氧化物排放量分別上升12％和13％。
關(guān)鍵詞：半電技術(shù)、無(wú)凸輪發(fā)動(dòng)機(jī)、機(jī)電式發(fā)動(dòng)機(jī)氣門、發(fā)動(dòng)機(jī)性能、排放
主頁(yè)：10.1631/jzus.A0900119 文獻(xiàn)標(biāo)識(shí)碼：A 圖書分類號(hào)：TH13
1.引言
幾乎所有內(nèi)燃機(jī)都有機(jī)械驅(qū)動(dòng)的進(jìn)排氣閥門。在較低和較高轉(zhuǎn)速下，傳統(tǒng)的閥門系統(tǒng)正時(shí)限制了發(fā)動(dòng)機(jī)性能。在ICE的領(lǐng)域里控制氣門的運(yùn)行是提高發(fā)動(dòng)機(jī)性能和在寬廣的速度范圍里滿足排放的有效方法。如凸輪形狀，氣門開啟時(shí)間對(duì)發(fā)動(dòng)機(jī)性能和排放量有重大影響。（巴坎和德雷斯納，1989;克勞特等，1992;波多野等人，1993;徹納爾，1998年;阿克巴什，2000年;皮興格等，2000年;斯坦因等人，1995年）