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精化内燃机排气系统结构是提高内燃机有效工作指标的现实途径之一。降低排出废气的流动阻力,特别是在排气冲程初始阶段,可以减小泵气所需的平均有效压力。因此,当循环供油量稍有变化即能使平均有效压力增加,从而降低了有效燃油消耗率。在排气结束时刻,缸内废气量减少,使窜入进气系统的废气量减到最低限度,这将有助于改善内燃机的工作过程。清扫废气加快,就能减小排气提前角,缩小排气阀的开启角,从而在循环有效功上得到收益。如果柴油机装有涡轮增压器,由于排气损失减小,就能提高涡轮作功能力,增大整个复合动力装置的功率。 莫斯科包伍曼工业大学内燃机教研室对内燃机的进气道和排气道结构要素进行了综合研
Refinement of the internal combustion engine exhaust system structure is to improve the effective work of internal combustion engine one of the practical ways. Reduce the exhaust gas flow resistance, especially in the initial stage of the exhaust stroke, you can reduce the pump the average effective pressure. Therefore, a slight change in the circulation fuel supply can increase the average effective pressure, thereby reducing the effective fuel consumption rate. At the end of the exhaust, the reduction of exhaust gas in the cylinder minimizes the amount of exhaust gas that enters the intake system, which will help to improve the working process of the internal combustion engine. To speed up the exhaust gas cleaning, the exhaust gas advance angle can be reduced, the opening angle of the exhaust valve can be narrowed, and the effective utility of the circulation can be benefited. If a diesel engine is fitted with a turbocharger, the reduction of exhaust loss can increase the workability of the turbine and increase the power of the entire composite power plant. Moscow Baguman Industrial University Internal Combustion Engine Research Department of the internal combustion engine intake and exhaust structural elements of a comprehensive study