Title:
The valve timing control system of an internal-combustion engine
Document Type and Number:
Japanese Patent JP5940001
Kind Code:
B2
Abstract:
In a valve timing control system of an internal combustion engine employing both an electric-motor-driven intake valve timing control device for changing intake valve timing and an electric-motor-driven exhaust valve timing control device for changing exhaust valve timing, the intake valve timing control device includes a less-friction roller speed reducer having a toothed gear and configured to transmit torque by repeated relocations of each of rollers rolling and relocating from one of two adjacent teeth of the toothed gear to the other. In contrast, the exhaust valve timing control device includes a planetary-gear speed reducer having a friction greater than a friction of the roller speed reducer and configured to transmit torque by meshed-engagement of toothed gears in mesh with each other.
Inventors:
Ryo Tadokoro
Kawada Makoto
Atsushi Yamanaka
Hiroyuki Nemoto
Kawada Makoto
Atsushi Yamanaka
Hiroyuki Nemoto
Application Number:
JP2013021947A
Publication Date:
June 29, 2016
Filing Date:
February 07, 2013
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
F01L1/356; F01L1/352
Domestic Patent References:
| JP2006207398A | ||||
| JP11280423A | ||||
| JP11280422A | ||||
| JP200857455A | ||||
| JP201138451A | ||||
| JP20082362A | ||||
| JP2010138735A | ||||
| JP2012197755A | ||||
| JP2008215313A | ||||
| JP200913964A |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tsuyoshi Hashimoto