【摘要】 基于一款1.5 L四缸汽油发动机，将进排气凸轮轴上第2、第3缸凸轮型线改制成基圆实现进排气门关闭，采用软件控制第2和第3缸停止喷油，在发动机台架上试验研究了两个气缸停缸后相对于原四缸汽油机的油耗和振动特性变化。研究结果表明：在转速1 000～4 000 r/min下，四缸汽油机停用两缸后，发动机倒拖机械损失功率降低了1.1%～10.4%,在试验工况点停缸发动机油耗改善了0.3%～6.4%,然而曲轴扭转振动幅度增大了5倍，发动机3个悬置点在3个方向上的直线振动也明显恶化。更多还原

【Abstract】 Based on a 1.5 L four-cylinder gasoline engine, the cam profiles of the second and third cylinders on the intake and exhaust camshafts were modified into base circles to achieve the closure of intake and exhaust valves, and software control was used to cut fuel injection in the second and third cylinders. The changes in fuel consumption and vibration characteristics relative to the original four-cylinder gasoline engine were experimentally studied on the engine bench after two cylinders were deactivated. The research results show that the mechanical power loss of four-cylinder gasoline engine with two deactivated cylinders reduces by 1.1%-10.4% and the fuel consumption at the test condition points improves by 0.3%-6.4% at the speed of 1 000-4 000 r/min. However, the amplitude of crankshaft torsional vibration increases by five times, and the linear vibrations in three directions of the engine’s three mounting points significantly deteriorate.更多还原