Abstract
Abstract
The requirements on vehicle emission control are more and more demanding. In order to meet these requirements, combustion engines have to be more efficient and so require new electronic engine management features. These innovative solutions on engine management are usually based on electrically actuated or regulated valves, pumps and turbines. MMT has developed BLDC actuator designs dedicated to high temperature engine environment on applications like Exhaust Gas Recirculation valve or Variable Geometry Turbo. These actuators encompass an MMT patented low cost design of BLDC motor, a reversible motion transformation, and a high temperature drive electronic. Additional optional features like fail-safe return spring, analog position sensor or clutch can also be added in the actuator. This presentation will show the detail of the MMT patented BLDC structure with an integrated position encoder, the integration of all these sub-assemblies for each feature in different actuator embodiments and the benefits of such actuators in applications like electric Exhaust Gas Recirculation valves or Variable Geometry Turbo electrically actuated. This paper will also present the possibility to decrease the cost of the drive electronic by developing an application dedicated ASIC integrating a standard three phase BLDC drive and all the specific features necessary in an automotive application like LIN communication.