产品名称：废气再循环技术（EGR） 

推荐企业：伊顿（中国）投资有限公司 

废气再循环技术（EGR）

技术特点

伊顿的EGR 泵为中重型发动机而设计。为未来排放法规(如欧7)提供燃油经济性改善和全范围EGR率控制方案。EGR泵集成了新型罗茨泵与48V电机，并于发动机排气系统兼容。目前已经过客户发动机台架测试验证，以良好的燃油经济性及出色的EGR率控制，达到甚至超过客户预期。

EGR泵用于驱动外部EGR，可实现EGR与涡轮匹配的解耦，从而实现涡轮增压器和进排气系统的最佳匹配。EGR泵通过主动驱动废气再循环，避免使用小规格涡轮或可变截面涡轮(VGT)来驱动，通过减少泵气损失来改善发动机燃油经济性和排放。与此同时，原EGR控制系统中某些昂贵的零件可以去除。如用固定截面涡轮(FGT)取代可变截面涡轮(VGT)，EGR阀，EGR流量计等。

伊顿EGR泵是一种改善发动机热效率和油耗的方法。主要优势如下：

改善燃油经济性 – 使用EGR泵后可以改进废气再循环(EGR)系统，主动驱动EGR率，提高高效率涡轮，降低泵气损失，实现更好的燃油经济性。通过主流客户发动机试验结果表明，热效率改善~1%，燃油消耗率下降~6%

降低排放 – EGR泵通过主动驱动废气再循环(EGR)，可实现EGR率全范围控制。解决了目前通过发动机排气背压控制无法提高EGR率的问题，进一步降低NOx排放。

去除某些昂贵零件 – 使用EGR泵可实现涡轮匹配和EGR驱动的解耦，可用固定界面涡轮取代可变截面涡轮。由于罗茨泵可精确控制流量，可去除EGR阀及流量计。

市场表现 

伊顿EGR泵可实现EGR驱动与涡轮增压器的解耦，可用更高效涡轮降低泵气损失，这可使发动机更高效地运行，改善发动机的热效率、降低油耗和排放。目前伊顿EGR泵产品已经在沃尔沃Supertruck 2上验证，为西南研究院CHEDE 8项目的一项重要技术。 

Eaton EGR Pump delivers HD Diesel fuel economy improvement and full-authority EGR rate control for upcoming emissions regs, e.g. Euro7. It’s designed with new Roots pump integrated with 48v electric motor and compatible with Diesel exhaust. Customers’ engine dyno tests have demonstrated fuel economy meeting or exceeding expectations and outstanding EGR rate control.

EGR Pump can be used to drive external EGR. It enables decoupling of EGR from turbo which can drive turbo matching for air system requirement. It drives EGR, and turbo is optimized for high efficiency boosting (replace VGT with FGT), then engine pump loss is reduced, and better fuel economy can be achieved. Meanwhile, some expensive components can be moved. E.g. Replacing VGT with FGT, deletion of EGR valve and flowmeter.

Advantage

Eaton EGR Pump is effective way to improve engine BTE and fuel economy. Main advantages are below:

Fuel Economy – EGR pump can drive EGR, and reduce pumping loss, and improve engine performance.  EGR Pump test on state-of-the-art HD engine has achieved ~1% BTE improvement and ~6% fuel economy improvement.

Full-authority EGR rate control – EGR Pump drives EGR. The full-authority EGR rate control has been demonstrated on current engine. By this way NOx can be further reduced.

Deletion of some expensive components – EGR Pump enables decoupling of EGR from turbo which can drive turbo matching for air system requirement. Some expensive components can be moved. E.g. Replacing VGT with FGT, deletion of EGR valve and flowmeter. 

Eaton EGR pump can achieve decoupling of EGR driving and turbocharger matching. More efficient turbine can be used to reduce pump air loss, which can make the engine run more efficiently, improve the thermal efficiency of the engine, reduce fuel consumption and emissions. At present, Eaton EGR pump has been verified on Volvo Supertruck 2, which is an important technology of SWRI CHEDE 8 project. 

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