储存到myST

选择性催化还原系统(SCR)

概述
文件
工具与软件
硬件评估工具
解决方案
主要产品
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。

SCR功能块的工作原理

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。

我们的产品和解决方案

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。

eDesignSuite

eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

Thermal-electrical Simulators for Components

Power Management Design Center

Choose design tool:

AC Switches Simulator

Select ratings and application waveforms
Get junction temperature and blocking voltage graphs
Search and sort suitable devices

Rectifier Diodes Simulator

Select ratings and application waveforms
Estimate power losses
Search and sort suitable devices

STPOWER Studio

Supports long mission profiles
Provides power loss and temperature graphs
Helps define heatsink thermal properties

Twister Sim

Help select the right ViPOWER Automotive power device
Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
Supports various PCB configurations

TVS Simulator

Specify system ratings and surge waveform
Search and sort suitable devices
Choose design tool:

Power Supply Design Tool

SMPS design, by topology, by type and by product
PFC design with analog and digitial control
Supports various PCB configurations
Choose type:
DC/DC
AC/DC
太阳能电池充电器

LED Lighting Design Tool

Handles AC-DC and DC-DC design in common topologies
Displays interactive and annotated schematic
Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
Choose type:
DC/DC
AC/DC

Digital Power Workbench

Provides a step-by-step optimized design of power section and control loop
Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

Power Tree Designer

Specify input/output power for each node in the tree
Check for consistency
Design each individual node