断开气缸时总扭矩不均匀性的测定

Q4 Engineering 内燃机学报 Pub Date : 2021-07-26 DOI:10.20998/0419-8719.2021.2.05
Т. М. Kolesnikova, V. Zarenbin, O. Sakno
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引用次数: 0

摘要

本文讨论了提高燃油经济性和降低废气毒性的热点方向之一,即内燃机怠速和部分负荷时的断缸问题。目前的汽缸分离内燃机有足够的技术解决方案来保证发动机工作过程的高燃油经济性和生态指标。因此,这种发动机需要解决以下任务:改进质量尺寸指标,降低成本和改进设计,提高可靠性等。运输车辆的主要任务之一也是降低发动机的振动水平。这项任务尤其适用于汽缸断开的内燃机。当气缸断开时,由于主动气缸的工作过程,总扭矩的不均匀性增加,从而导致发动机冲程的不均匀性,从而影响车辆的整体动态特性。为了解决这一问题,考虑了内燃机扭动量不均匀的一般规定。对不同发动机的总扭矩进行了处理,得到了扭矩的不均匀性数据。提出了一种研究换缸,特别是主动换缸个数对总转矩不均匀性影响的方法。引入了气缸断开时扭转力矩变化度的概念,并给出了其随活动气缸数变化的方程。文中还引入了气缸断开时扭矩系数变化的概念。应用四缸直列发动机的计算方法,比较了该发动机在分离气缸时扭动量不均匀性变化的可能性。计算结果表明,平均3、2、1缸发动机工作时的转矩不均匀系数在1、5缸时增大;2和3乘以。对计算结果进行了分析,并给出了活动气缸数的所有可能值的直方图。
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DETERMINATION OF THE COMPONENTS OF THE TOTAL TORQUE NON-UNIFORMITY WHEN DISCONNECTING THE CYLINDERS
The article considers one of the topical directions of increasing fuel economy and reducing the toxicity of exhaust gases, namely, cylinder disconnection of internal combustion engines (ICE) in idling and partial loads. Current internal combustion engines with cylinder disconnection have enough technical solutions to ensure high fuel economy and ecological indicators of the engine working process. Accordingly, such engines require solution of the following tasks: improvement of mass-size indicators, cost reduction and design improvement, increase of reliability, etc. One of the main tasks of transport vehicles is also reducing the level of engine vibrations. This task is especially relevant for internal combustion engines with disconnected cylinders. When cylinders are disconnected, the unevenness of total torque increases from working processes in active cylinders and, as a result, the unevenness of the engine stroke, which affects the dynamic characteristics of the vehicle as a whole. To solve this problem, the general provisions of torsional momentum unevenness of internal combustion engines were considered. Total torsional torque of different engines was processed and data on the unevenness of torsional torque was obtained. The method of investigating the influence of cylinder switching, particularly the number of active cylinders on the unevenness of total torque is developed. The notion of torsional torque change degree with cylinder disconnection is introduced and the equation for its determination depending on the number of active cylinders is proposed. The notion of torsional torque coefficient change at disconnection of cylinders is also introduced. The application of the calculation of a four-cylinder inline engine for the possibility to compare changes in the torsional momentum unevenness when the cylinders are disconnected in the given engine was made. As a result of the calculations it was found that the torque unevenness coefficient at operation of the engine with 3, 2 and 1 cylinders in the average increases in 1,5; 2 and 3 times. The results of calculations were analyzed and histograms for all possible values of the number of active cylinders have been provided.
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来源期刊
内燃机学报
内燃机学报 Engineering-Mechanical Engineering
CiteScore
1.00
自引率
0.00%
发文量
3050
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