Fluid transmission device with variable torque transmission efficiency

Abstract

Abstract PURPOSE:To reduce variations in torque and enhance the economy of fuel consumption, by disposing an electrical viscofluid clutch which varies its transmission efficiency of torque. CONSTITUTION:Power transmitted from an engine to an input shaft 10, is transmitted to an output shaft 14 through a fluid transmission device 12. A fluid transmission device 12 comprises an electrical viscofluid clutch 16 and a torque converter 18. A flange 20 is formed at its end face of the input shaft 10. The output shaft 14 is disposed coaxially with the input shaft 10. A clutch disc 30 is incorporated in a chamber 27, and the transmission casing 22 is spaced apart from the clutch disc 30. An electrical viscofluid is filled in the chamber 27, and increases its viscous resistance under d.c. external electric field, that is, it has a characteristic exhibiting an electrical viscous effect as is called as WINTHROW effect. With this arrangement, when a voltage 30 is applied between slip rings 38, 40, the torque transmission efficiency may be increased.

Inventors

• 👤 Tamotsu Kamiya
• 👤 保 神谷
• 👤 Masaaki Takizawa
• 👤 正明 滝沢

Bibliographic Details