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汽车安全与节能学报

汽车安全与节能学报 ›› 2025, Vol. 16 ›› Issue (2): 243-251.DOI: 10.3969/j.issn.1674-8484.2025.02.007

• 汽车节能与环保 • 上一篇    下一篇

搭载可变气门机构的柴油机二冲程制动性能

张旭1,2(), 谭慧莹1, 吴伟海3, 谢宗法1,2,*()   

  1. 1.山东大学 机械工程学院，济南 250061，中国
    2.山东大学 高效洁净机械制造教育部重点试验室，济南 250061，中国
    3.潍坊德利普特种设备安全技术有限公司，潍坊 261200，中国
  • 收稿日期:2024-10-21 修回日期:2024-11-02 出版日期:2025-04-30 发布日期:2025-04-22
  • 通讯作者: * 谢宗法，教授，E-mail：zongfax@sdu.edu.cn。
  • 作者简介:张旭，男（汉），安徽，硕士。E-mail：2923071051@qq.com。
  • 基金资助:
    山东省烟台市科技计划资助项目(2022ZDCX007)

Two-stroke braking performance of diesel engine equipped with variable valve mechanism

ZHANG Xu1,2(), TAN Huiying1, WU Weihai3, XIE Zongfa1,2,*()   

  1. 1. School of Mechanical Engineering, Shandong University, Jinan 250061, China
    2. Key Laboratory of High Efficiency and Clean Machinery Manufacturing of Shandong University, Jinan 250061, China
    3. Weifang Delipu Equipment Safety Technology Co., LTD., Weifang 261200, China
  • Received:2024-10-21 Revised:2024-11-02 Online:2025-04-30 Published:2025-04-22

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摘要：

针对重型柴油机二冲程制动过程中气门开启压力较高导致的驱动系统负荷过大问题，提出一种可以实现气门运动模式动态切换的集成式液压变模式气门驱动系统（HVMVS），利用GT-Power搭建了六缸柴油机仿真计算模型，仿真分析了能够产生高制动转矩且将最大缸压维持在较低水平的气门运行参数最佳值，研究了不同转速下搭载HVMVS柴油机的二冲程制动性能，对比分析了该系统与其他可变气门系统的制动性能。结果表明：在柴油机额定转速时，HVMVS二冲程制动可以产生1 158 Nm的有效制动转矩，缸内最大压力为2.3 MPa，相比于其他系统降低了62%。HVMVS可以显著降低柴油机二冲程制动过程的缸内最大压力和驱动机构负荷，提高柴油机二冲程制动过程可靠性，在重型发动机中具有良好的应用前景。

关键词: 车辆安全性, 缸内制动技术, 可变气门技术, 液压气门系统, 二冲程制动技术

Abstract:

To address the issue of excessive driving system load caused by high valve opening pressure during two-stroke braking in heavy-duty diesel engines, this study proposes an integrated hydraulic variable mode valve system (HVMVS) capable of dynamic valve motion pattern switching. A six-cylinder diesel engine simulation model was established using GT-Power software to investigate optimal valve operation parameters that achieved high braking torque while maintaining low maximum cylinder pressure. Brake performance analysis was conducted across different rotational speeds for diesel engines equipped with HVMVS, including comparative evaluations with conventional variable valve systems. The results show that at rated engine speed, the HVMVS-equipped two-stroke braking system generates 1 158 Nm effective braking torque with a maximum cylinder pressure of 2.3 MPa, leading to a 62% reduction compared to alternative systems. The HVMVS demonstrates significant advantages in mitigating both maximum in-cylinder pressure and drive mechanism load during two-stroke braking operations, thereby enhancing operational reliability. These findings indicate promising application prospects for HVMVS in heavy-duty engine applications.

Key words: vehicle safety, exhaust braking technology, variable valve drive system, fully hydraulic variable valve system, two-stroke braking technology

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