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首页> 外文会议>International Conference on Ecological Vehicles and Renewable Energies >Improving longitudinal dynamics of conventional vehicles in comparison to electrified vehicles to meet customer behavior
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Improving longitudinal dynamics of conventional vehicles in comparison to electrified vehicles to meet customer behavior

机译：与电动车辆相比，可改善常规车辆的纵向动力学，从而满足客户行为

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Automobile manufacturers progressively focus on a downsizing strategy to meet the EU's CO fleet requirements concerning type approval consumption cycles. The reduction in naturally aspirated engine power due to reduction of displacement is compensated by application of turbocharging. However, the downsizing of conventional engines implicates major challenges regarding longitudinal dynamic characteristics. An example of this circumstance is the delayed turbocharger-induced torque reaction which leads to a partially poor response behavior of the vehicle during acceleration operations (tubo-lag). It is important to focus conventional drive train design on real customer driving again. Electrification of the drive train increases the response behavior, while simultaneously CO emissions are reduced. Thus, an electric engine provides the desired torque almost without delay. The advantage over a conventional vehicle is particularly noticeable at low engine speeds. This paper complements current dynamic criteria (e.g. acceleration 0-100 kph, elasticity 80-120 kph) illustrated in manufacturer information by realistic acceleration maneuvers to objectify customer-oriented transient dynamics. As a result, longitudinal dynamics experienced by a driver is adequately described. In this contribution we present a simulation based method for evaluating these realistic dynamic criteria. This method extends an existing stationary total vehicle model by a specifically adapted engine torque gradient model to consider transient influences like the boost pressure of the turbocharger. This contribution focuses on an evaluation of electrified technical measures (e.g. use of 48V in combination with an electric charger) to strengthen the customer-oriented longitudinal dynamics in conventional vehicles. By applying the validated transient simulation tool we determine the extent to which the instantaneous torque response of conventional vehicles can be adapted to the torque response of fully electrified vehicles. Design measures (e.g. gear ratio and vehicle weight) and technical electrified measures (e.g. e-charger) both improve longitudinal response in daily driving situations. But for each vehicle design a varying set of measures improves dynamics best considering effectiveness.
机译：汽车制造商逐渐关注缩小规模的战略，以满足欧盟关于型式认可消费周期的CO车队要求。由于排量减小而导致的自然吸气发动机功率的减小可通过应用涡轮增压来补偿。然而，常规发动机的小型化带来了关于纵向动态特性的重大挑战。这种情况的一个示例是延迟的涡轮增压器引起的扭矩反作用，这会导致车辆在加速操作过程中的响应性能部分变差（延误滞后）。重要的是，将常规动力传动系统设计再次集中在实际的客户驾驶上。传动系统的电气化提高了响应性能，同时减少了CO排放。因此，电动发动机几乎没有延迟地提供期望的扭矩。在低发动机转速下，与常规车辆相比的优势尤其明显。本文通过实际的加速操作来补充制造商信息中说明的当前动态标准（例如，加速度0-100 kph，弹性80-120 kph），以客观化面向客户的瞬态动力学。结果，充分描述了驾驶员经历的纵向动力学。在这一贡献中，我们提出了一种基于仿真的方法来评估这些现实的动态标准。该方法通过专门适配的发动机扭矩梯度模型扩展了现有的固定式总车辆模型，以考虑瞬态影响，例如涡轮增压器的增压压力。这项贡献着重于对电气化技术措施的评估（例如，结合使用48V充电器），以增强传统车辆中以客户为导向的纵向动力。通过使用经过验证的瞬态仿真工具，我们可以确定常规车辆的瞬时扭矩响应可以适应全电动车辆的扭矩响应的程度。设计措施（例如齿轮比和车辆重量）和电气化技术措施（例如电子充电器）都可以改善日常驾驶情况下的纵向响应。但是，对于每种车辆设计，考虑到有效性，最好采用一组不同的措施来改善动力性能。

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