某直列三缸1.0升涡轮增压直喷汽油发动机的开发

摘要

A 1.0 liter 3-cylinder turbocharged gasoline direct injection (TGDI) engine was designed and developed by Dongfeng Motor Corporation.In design and development,computational fluid dynamics (CFD) simulation,port fiow test,transparent engine investigation and a series of advanced technologies were used to optimize the combustion system to improve the comprehensive performances.An efficient and low inertia turbocharger was selected,to ensure performance output and transient responsiveness.Effective technical measures including friction reducing,thermal management,variable oil pump and dual variable valve timing (DVVT) were applied to achieve the good fuel economy.Engine structure design,mass balancing strategy and mounting system optimization were made to achieve excellent noise vibration and harshness (NVH) performance.Bench tests and vehicle carrying tests were done.The results show that benefited from the modular design concept,the engine size is minimized with the advantages for packaging,especially for hybrid vehicles,therefore meeting the design goals of the engine performances.%介绍东风汽车公司所研发的某新型1.0 L三缸直列涡轮增压直喷(TGDI)汽油发动机.研发中,经过计算流体动力学(CFD)模拟、气道试验和透明发动机试验,优化了燃烧系统,提高其综合性能;采用高效率和低惯量涡轮增压器,保证了良好的全转速性能输出和瞬态响应速度;采用低摩擦、热管理、变排量机油泵和进排气气门可变正时技术(DVVT)等措施,实现了低油耗;优化发动机本体结构设计,研究平衡策略,并设计悬置系统匹配,获得了良好噪声/振动/不平顺性(NVH)性能.进行了台架试验和整车搭载试验.结果表明:该发动机各项性能指标达到设计目标,体积小、结构紧凑,适于不同传统车型和混合动力车型搭载.