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Close late intake valve to improve cold start capability on spark-ignition and direct-injection engines (SIDI)

机译:关闭后进气门以提高火花点火和直喷发动机(SIDI)的冷启动能力

摘要

An engine control system comprising: a cam phaser (34) that introduces a cam phase angle θ between a camshaft intake cam (22) and an associated crankshaft (40); a fuel injector (62) that injects fuel directly into a cylinder (14); mechanical fuel pump (30) driven by a camshaft (26); andan engine control module (12) that communicates with the cam phaser (34) to introduce the camshaft angle θ while an engine (10) is starting, wherein the camshaft angle θ is selected such that the camshaft intake cam (22) during at least a portion a compression stroke of the cylinder (14) to which the camshaft inlet cam (22) is associated, an inlet valve (18) opens.
机译:一种发动机控制系统,包括:凸轮相位器(34),其在凸轮轴进气凸轮(22)和相关的曲轴(40)之间引入凸轮相位角θ;和燃料喷射器(62)将燃料直接喷射到气缸(14)中;机械燃油泵(30)由凸轮轴(26)驱动;发动机控制模块(12),其在发动机(10)启动时与凸轮移相器(34)连通以引入凸轮轴角θ,其中,选择凸轮轴角θ,使得至少在至少一个过程中凸轮轴进气凸轮(22)在与凸轮轴入口凸轮(22)相关联的气缸(14)的压缩冲程的一部分处,入口阀(18)打开。

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