基于遗传-支持向量机的对置活塞二冲程柴油机气口高度优化

Taking fuel consumption as the optimization goal, the automatic optimization of the intake and exhaust port height of an opposed-piston two-stroke diesel engine prototype for various engine speeds was simulated experimentally by using the genetic-support vector machine method on the basis of one-dimensional simulation model. The results showed that under the low engine speed such as 1200r/min, the combination of optimized dimensionless intake and exhaust ports height was[0.075, 0.105], and the minimum fuel consumption was 220. 32g/(kW•h). For the opposed-piston two-stroke diesel engine, the optimized port height for either intake port or exhaust port monotonically increased with the increasing engine speed. Exhaust port height increased more obviously than that of intake port for optimized port height under high engine speed (engine speed was greater than 1600r/min).