Title:
VARIABLE VALVE TIMING DEVICE
Document Type and Number:
Japanese Patent JPH04164109
Kind Code:
A
Abstract:
PURPOSE:To downsize the outer diameter and to provide the required brake torque to a drum gear and operate it by providing a braking means which is used to give brake torque to the drum gear outside the ring gear with a cam shaft as a center. CONSTITUTION:A ring gear 13 is interposed between a timing pulley 7 and a cam shaft 1, and the timing pulley 7 and the cam shaft 1 are connected. An annular magnet 27 as a braking means is contained peripherally inside a brake plate 25. This magnet 27 is arranged at the position outside the ring gear 13 with the cam shaft 1 as a center. This arrangement allows the outer diameter of the whole device with the cam shaft 1 as a center to be downsized, resulting in improvement of mountability of the device itself onto the engine. A relatively small braking force generated by the magnet 27 can give the drum gear 20 the brake torque to resist the rotational force of the ring gear 13, leading to reduction of the power losses.
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Inventors:
IWASHITA YOSHIHIRO
KASHIWAKURA TOSHIMI
KASHIWAKURA TOSHIMI
Application Number:
JP29019490A
Publication Date:
June 09, 1992
Filing Date:
October 26, 1990
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01L1/34; F01L1/344; (IPC1-7): F01L1/34
Attorney, Agent or Firm:
Hironobu Onda (1 person outside)