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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >EXPERIMENTAL EVALUATION OF PISTON ASSEMBLY FRICTION UNDER MOTORED AND FIRED CONDITIONS IN A GASOLINE ENGINE
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EXPERIMENTAL EVALUATION OF PISTON ASSEMBLY FRICTION UNDER MOTORED AND FIRED CONDITIONS IN A GASOLINE ENGINE

机译：汽油机动力和点火条件下活塞总成摩擦力的实验评估

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摘要

Piston assembly friction measurement has been carried out on a single cylinder gasoline engine using the IMEP (indicated mean effective pressure) method at realistic engine speeds and loads without any major engine modifications. Instantaneous and mean piston assembly friction were measured under motored and fired conditions at different lubricant temperatures. The forces acting on the piston assembly were carefully determined by measuring the cylinder pressure, crankshaft angular velocity and strain in the connecting rod. The difference between the resulting gas pressure, inertia and connecting rod axial forces acting on the piston yields the piston assembly friction. To achieve this with confidence, an advanced instrumentation, telemetry and data acquisition system was designed and developed, giving special attention to the synchronisation and simultaneous sampling of analogue and digital channels. Experiments are reported for piston assembly friction at a range of engine operating conditions with different lubricant formulations, with and without a friction modifier.
机译：已经使用IMEP（指示平均有效压力）方法在单缸汽油发动机上以实际的发动机转速和载荷对活塞组件的摩擦进行了测量，而没有对发动机进行任何重大改动。在机动和燃烧条件下，在不同的润滑剂温度下，测量瞬时和平均活塞组件的摩擦力。通过测量气缸压力，曲轴角速度和连杆中的应变来仔细确定作用在活塞组件上的力。产生的气压，惯性和作用在活塞上的连杆轴向力之间的差会产生活塞组件的摩擦力。为了满怀信心地实现这一目标，设计并开发了一套先进的仪器，遥测和数据采集系统，尤其要注意模拟和数字通道的同步和同步采样。据报道，在有和没有摩擦调节剂的情况下，使用不同的润滑剂配方，在各种发动机工况下，活塞组件的摩擦都进行了实验。

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