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选择性催化还原系统(SCR)

概述
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工具与软件
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解决方案
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选择性催化还原(SCR)是将氮氧化物(NOx)转化为双原子氮和水以及少量二氧化碳的化学过程。通过添加汽车级尿素(称为柴油机尾气处理液(DEF)或商业品牌如AdBlue和Bluetech),将柴油引擎的有害NOx排放转化为无害的氮和水的一个过程。 SCR模块控制泵从储罐中抽出DEF,并用适当的计量阀将其注入柴油机废气中。为了优化燃油效率,在催化还原过程之后使用气体传感器,然后将气体传感器的信息输送到柴油引擎ECU,后者将该信息与引擎状态相结合,向SCR单元提供有关待释放的正确DEF液体量的准确信息。 我们为常用的无刷直流(BLDC)电机提供一系列三相栅极驱动器和功率MOSFET,以及SPC5 32位微控制器和带有调压器和CAN与LIN接口IC的专用电源管理IC,从而简化高效解决方案的设计过程。 阅读更多

How the SCR block works

The SCR block controls a pump that draws DEF from its tank and injects it, with an appropriate dosing valve, into the diesel exhaust gases. To optimize fuel efficiency, a gas sensor is located after the catalytic reduction process and its information is fed to the diesel engine ECU that combines this information with the engine status and give to the SCR unit accurate information regarding the right amount of DEF liquid to release.

Our products and solutions

We have a range of three-phase gate drivers and Power MOSFETs for the commonly used brushless DC (BLDC) motors, as well as SPC5 32-bit microcontrollers and dedicated power management ICs with voltage regulators and CAN and LIN Interface ICs to simplify the design of high-efficiency solutions.