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主要特點： 動力強，低油耗，歐四排放技術。 采用先進技術含量的多點電控燃油噴射系統(tǒng)。其結構形式是：4氣缸、直列、水冷、多點電噴燃油噴射。 與同類產(chǎn)品相比，具有體積小、質(zhì)量輕、噪聲小、排放低的優(yōu)點，具有較高的動力性和較好的燃油經(jīng)濟性。 由于采用先進的加工工藝，實施科學的質(zhì)量管理，因此，491系列發(fā)動機具有優(yōu)良，穩(wěn)定的產(chǎn)品質(zhì)量，具有較強的市場競爭力。 The Features of the Engine: Strong power, low fuel consumption, EURO IV Multi-pointECISystem, 4 cylinders in-line, water-cooled High in power, good in fuel economy; Small in size, light in weight, little in noise, low in emission 491series of engine is very competitive due to its excellent and stable quality and performance. 4．1．10檢查氣門座的磨損情況及有無損傷。必要時應修整氣門座，此時首先應檢查氣門導管的磨損情況，如已磨
