The TVS EGR pump is driven by a 48-volt electric motor, making it completely independent from engine speed and significantly more controllable than pump-less EGR systems. TVS technology enables EGR flow in operating regions where it wasn’t possible to drive flow before and provides more accurate EGR flow rate control for better combustion and emissions management.

The TVS EGR pump leverages our experience with superchargers and positive displacement pumps. While the two are similar, a supercharger generates a high boost with average pressure ratios of 2.0 to 3.0 for many applications; an EGR pump uses a shorter rotor assembly and lower twist to produce flow just slightly above the intake pressure, or a pressure ratio of 1.05 to 1.50.

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概述规格资源支持

核心功能

Positive displacement pump provides full authority control of EGR flow rate
Pump speed feedback provides measured flow of EGR
Electrical drive to match EGR demand independently from engine speed
Optimized materials to withstand EGR in commercial vehicles

Efficiency

Improves fuel efficiency while achieving emissions regulations

Cost

Eliminates cost of variable geometry turbo, EGR valve and intake throttle

Control

Precise transient emissions control

Wider Range

Enables wider range of EGR calibration over entire engine operating map

Learn more about the Eaton TVS EGR Pump

This video explains how the Eaton TVS EGR Pump can help diesel engine manufacturers achieve future emissions regulation compliance, reduce cost, NOx emissions, and improve fuel economy.

Learn more about TVS technology

TVS has several innovative features that make it reliable and efficient.

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规格

TVS EGR pump

The setup allows the turbocharger to be optimized for maximum efficiency boosting without being compromised by the need to drive the EGR, which allows customers to utilize a highly efficient and lower-cost fixed geometry turbo (FGT) in place of variable geometry turbocharger (VGT) technology. In an engine designed with an efficient FGT, pumping work is decreased, enabling better fuel economy.

In addition, the pump allows engine manufacturers to eliminate a number of expensive components, including the turbocharger’s variable geometry turbine and actuator, the EGR valve, and potentially the EGR flow meter. Because the pump is a positive-displacement device, the engine controller can use the pump speed signal as well as other Controller Area Network (CAN) sensor data to accurately calculate EGR mass flow rate.

The pump’s fast response and independence from engine speed and load enable a wide range of EGR calibration over the entire engine operating map and can provide more precise flow rate control, especially during engine transients. With TVS EGR pump’s full-authority flow rate control, engine manufacturers will be able to meet new emissions regulations with fewer compromises to fuel economy.

Additionally, because the pump can maintain any desired EGR flow rate, it can play an important role in emerging diesel engine efficiency strategies such as Miller Cycle operation, which leverages late intake valve closing for added fuel efficiency, and other key operating functions.

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