Mitsuba Corporation

Takayuki Kawakura

Masahiro Fueki

Yuichi Yanagita

Narimitsu Kobori

Katsuhiro Tanino

Kenichi Hirano

Naohiko Shiga

Mikihito Shimoyama

Tomoyuki Ogawa

Takao Arai

The control device for a closure member of a vehicle according to the present invention comprises: estimated load calculation means () for obtaining an estimated load from a rotation speed, acceleration, and drive voltage of a DC motor () for driving a closure member (); motor torque calculation means () for calculating a motor torque from the rotation speed and drive voltage of the motor; reference torque calculation means () for calculating a reference torque based on a stationary state of the motor torque; and pinching determination means () for determining a pinching of an object based on the estimated load, motor torque and reference torque, wherein the pinching determination means determines that there is no pinching when at least one of the estimated load and the motor torque is below the reference torque even when the estimated load is greater than a prescribed threshold value.

Control device for a closure member of a vehicle

Various component parts of a driver circuit for drive sources such as electric motors and clutches, such as relays and FETs as well as the drive sources can be tested by selectively energizing the relays and evaluating the voltage levels of the selected points by using the first and second test voltage detection circuits. This testing process is typically executed before the power up of the drive circuit. The test current is so small that the drive sources would not be inadvertently activated and various components would not be damaged even when there is any faulty component in the driver circuit. When any faulty component is detected in the testing process, the driver circuit may be prevented from being powered up so that any undesired operation of the drive sources or permanent damage to various components owing to such a faulty component may be avoided.

Fault detection circuit for a driver circuit

Growing community of inventors

Kiryu, Japan

Takayuki Kawakura