首页> 外文会议>2001 Fall Technical Conference of the Asme Internal Combustion Engine Division, 2001, Sep 23-26, 2001, Argonne, Illinois >PRELIMINARY INVESTIGATION OF DILUTION STRATEGIES TO CONTROL ENGINE TORQUE DURING TRANSIENT EVENTS
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PRELIMINARY INVESTIGATION OF DILUTION STRATEGIES TO CONTROL ENGINE TORQUE DURING TRANSIENT EVENTS

机译:瞬态事件中控制发动机扭矩的稀释策略的初步研究

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A continuously variable transmission (CVT) allows a powertrain controller the freedom to develop a required output power at a range of engine torque and speed conditions. This flexibility can be used to maximise fuel efficiency. Due to low frictional and pumping losses a gasoline engine's fuel efficiency is maximised at low speed, high torque conditions. However due to the reduced torque margin available, controlling a gasoline engine in this region compromises transient vehicle response. Dilution torque control, using EGR or lean burn, has the potential to maintain the economy gains available using a CVT powertrain whilst improving a vehicle's driveability. This paper introduces preliminary work that has been undertaken to investigate the potential of charge dilution to control steady state engine torque. A test rig has been developed based around an engine fitted with variable cam phasing and an external EGR system. The paper contains a discussion of initial results of a lean dilution test program used to demonstrate the principle.
机译:无级变速器(CVT)允许动力总成控制器自由地在一定范围的发动机扭矩和速度条件下开发所需的输出功率。这种灵活性可用于最大化燃油效率。由于低摩擦和泵送损失,汽油发动机的燃油效率在低速,高扭矩条件下得以最大化。然而,由于可用的减小的扭矩裕度,因此在该区域中控制汽油发动机会损害瞬态车辆响应。使用EGR或稀薄燃烧的稀释扭矩控制有可能保持使用CVT动力总成的经济收益,同时提高车辆的驾驶性能。本文介绍了已开展的初步工作,以研究电荷稀释的潜力,以控制稳态发动机扭矩。基于装备有可变凸轮相位和外部EGR系统的发动机开发了一种测试装置。本文讨论了用于证明该原理的稀稀释测试程序的初始结果。

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