面向工况信息、车辆动力系统与智能控制的能量管理研究综述

汽车产业的蓬勃发展在给人民生活带来便捷的同时,也带来了能源与环境方面的双重问题,能量管理技术凭借其在节能减排领域的突出表现成为汽车研究与开发的一个重点方向。介绍了实现能量管理技术的三大要素,工况信息、车辆动力系统和能量分配策略,并总结了它们之间的关系,从这3个角度出发,对汽车能量管理研究进行分类介绍。提出了能量管理研究在区域交通调度、电网负荷调节等领域的发展方向,为今后的研究提供参考。     

浅析ETC在内蒙古高速公路的推广应用

随着收费公路在各省区内成网,ETC应运而生。在国家取消高速公路省界收费站的进程中,ETC用户的占比成为此项改革成败的关键指标。文章通过对ETC在我国及内蒙古地区的发展历程分析、解读,旨在明确取消省界站和推广ETC在逻辑上顺承和事实上依存关系,同时,探讨ETC在内蒙古的推广应用,明确指出随着云计算、大数据、边缘计算、AI的迅速普及和高效运用,未来这张网的走向应该是产业互联网。     

发动机起停技术控制策略的研究

详细介绍了发动机起停技术的控制策略,提出了可行的起停系统方案,并在搭载的实车上进行了综合油耗测试,最终取得了较好的节油效果。     

增程/插电式电动商用车制动能量回收分析

以一款增程/插电式电动商用车为研究对象,对制动系统结构进行分析。以并联式气电复合制动为例,在中国典型城市工况下对该电动商用车的制动过程进行了仿真,为制动能量回收的进一步优化提高了参考。     

汽车线束搭铁设计

主要介绍线束搭铁设计策略,搭铁点选择以及搭铁形式。     

浅谈在厦门市政工程中施工企业的投标报价

投标报价是市政施工企业在工程承包过程中一个关键性环节;是业主选择中标单位的主要标准;也是业主和投标单位签订承包合同的重要依据。该文总结了多年从事厦门市政工程项目投标报价工作的经验,针对厦门市政工程中有关投标报价方面的内容进行分析,并就其策略与技巧事项作了探讨,可供同行参考。     

高压共轨系统预喷控制策略研究

柴油机高压共轨燃油喷射系统可实现预喷、主喷和后喷的多次喷射,达到燃烧柔和效果,有效地降低燃烧噪声,减少排放,是世界内燃机行业公认的未来柴油机燃油系统的发展方向。在预喷机理分析的基础之上,提出了高压共轨燃油喷射系统预喷的控制策略,解决了预喷控制中有关喷射协调、预喷油量、喷射起始时刻、喷油器作用时间和预喷释放等问题。     

轻度混合控制策略下混合动力电动汽车能量优化与仿真

为了优化轻度混合控制策略下的CFA6470混合动力电动汽车能量总成控制系统,设计了能量总成控制器,并将其分成5个模块;分析了节气门开启角与车辆行驶挡位的优化方法,轻度混合时的能量分配策略;提出了基于能量守恒原理的电池组荷电状态估计方法,并根据ECE-EUDC工况,在2种不同的期望车速下对设计的控制系统进行了仿真。仿真结果表明:在发动机的期望工况下,所设计的能量总成控制系统能够实现能量在发动机、驱动电机以及电池组之间的合理分配,电池组的荷电状态变化规律与车辆行驶状态相符合。     

Combined control of a regenerative braking and antilock braking system for hybrid electric vehicles

Most parallel hybrid electric vehicles (HEV) employ both a hydraulic braking system and a regenerative braking system to provide enhanced braking performance and energy regeneration. A new design of a combined braking control strategy (CBCS) is presented in this paper. The design is based on a new method of HEV braking torque distribution that makes the hydraulic braking system work together with the regenerative braking system. The control system meets the requirements of a vehicle longitudinal braking performance and gets more regenerative energy charge back to the battery. In the described system, a logic threshold control strategy (LTCS) is developed to adjust the hydraulic braking torque dynamically, and a fuzzy logic control strategy (FCS) is applied to adjust the regenerative braking torque dynamically. With the control strategy, the hydraulic braking system and the regenerative braking system work synchronously to assure high regenerative efficiency and good braking performance, even on roads with a low adhesion coefficient when emergency braking is required. The proposed braking control strategy is steady and effective, as demonstrated by the experiment and the simulation.     

PSO algorithm-based parameter optimization for HEV powertrain and its control strategy

The coordination between the powertrain and control strategy has significant impacts on the operating performance of hybrid electric vehicles (HEVs). A comprehensive methodology based on Particle Swarm Optimization (PSO) is presented in this paper to achieve parameter optimization for both the powertrain and the control strategy, with the aim of reducing fuel consumption, exhaust emissions, and manufacturing costs of the HEV. The original multi-objective optimization problem is converted into a single-objective problem with a goal-attainment method, and the principal parameters of powertrain and control strategy are set as the optimized variables by PSO, with the dynamic performance index of HEVs being defined as the constraint condition. Computer simulations were carried out, which showed that the PSO scheme gives preferable results in comparison to the ADVISOR method. Therefore, fuel consumption and exhaust emissions of HEVs can be effectively reduced without sacrificing dynamic performance of HEVs.