2012年6月14日 · EGR & Variable Valve Timing. One item that’s going the way of the smog pump is the Exhaust Gas Recirculation (EGR) valve. The elimination of the EGR valve is the result of the VVT’s ability to control gases entering and exiting the combustion chamber.

广汽gmc2.0的42.1%热效率，不仅是参数的胜利，更是**“全域标定能力”**的集中爆发——从egr的毫米级控制到整车的千公里路试，中国汽车工业正用“数据闭环”与“场景穿透”，重新定义动力系统的技术高度。

1.点火角匹配。不同vvt及egr组合下对点火角进行扫点，获取各转速负荷下的最佳vvt、egr、点火角组合，需要使用燃烧分析仪及排放设备（如avl i60、avl489等）； 2.喷油控制匹配。喷油控制主要分为两部分，喷油相位标定和喷油次数标定。

Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with variable valve lift systems.

egr系统一般可通过内部egr和外部egr两种方式来实现循环，本文着重介绍电控外部egr的控制匹配。 内部EGR：通过扩大气门重叠角来实现的，即增大进气门提前开启和推迟排气门延迟关闭或提高 排气背压 等方法来增加缸内的残余废气，残余下个循环的燃烧，从而 ...

2018年4月10日 · The aim of this study was to investigate the effects on part load combustion and emission performance of internal exhaust gas recirculation (EGR) by variable exhaust valve lift actuation using a cam-in-cam system, which is an electronically variable valve device with a variable inside cam retarded to about 30 degrees.

2019年10月1日 · VCR and VVT strategies were optimized and evaluated based on RCCI combustion. The utilization of EGR rate for VCR strategy is more flexible than VVT strategy. At low and mid load, premixed combustion is preferred for both VCR and VVT strategies. VCR strategy is more practical for high load operation in terms of fuel efficiency and soot emissions.

2024年9月15日 · VVT-i，全称Variable Valve Timing-intelligent，代表的是智能型可变气门正时系统。 这项技术能够显著提升进气效率，确保在低至中转速范围内扭矩的充分释放，从而在各种驾驶条件下均能提供充沛的动力。

2012年6月14日 · The elimination of the EGR valve is the result of the VVT’s ability to control gases entering and exiting the combustion chamber. EGR systems are designed to reduce smog-causing nitrous oxides (NOx) by recirculating a portion of the exhaust gases from each cylinder of the engine back into the intake manifold.

2016年10月14日 · The elimination of the EGR valve is the result of the VVT’s ability to control gases entering and exiting the combustion chamber. EGR systems are designed to reduce smog-causing nitrous oxides (NOx) by recirculating a portion of the exhaust gases from each cylinder of the engine back into the intake manifold.