METHOD FOR MANUFACTURE OF VALVE TIMING CONTROL DEVICE

Title:

METHOD FOR MANUFACTURE OF VALVE TIMING CONTROL DEVICE

Document Type and Number:

Japanese Patent JP2004183666

Kind Code:

A

Abstract:

To increase response to actuation by reducing leakage of hydraulic oil by preventing deformation of a cylindrical housing.

The cylindrical housing 8, having a sprocket part 3 at the outer periphery and a partition wall 12 projected at the inner periphery, is formed by sintering. A vane member 5 connected to a camshaft 1 is housed and arranged at the cylindrical housing 8, and an angle-of-lead hydraulic chamber 15 and an angle-of-delay hydraulic chamber 16 are arranged at both sides of the blade part 14 of the vane member 5. A rotating phase of the cylindrical housing 8 and the camshaft 1 is changed by timely supplying and draining hydraulic pressure to each hydraulic chamber 15, 16. In order to manufacture such a valve timing control device, the cylindrical housing 8 is sintered by filling powder metal in a molding die, then the sprocket part 3 is rolled, and finally the cylindrical housing 8 is heat-treated. The sprocket part 3 prevents overall deformation of the cylindrical housing 8, and corrects deformation caused by sintering when rolled.

Inventors:

MAEYAMA AKINOBU
TSUKADA TOMOYA

Application Number:

JP2003422263A

Publication Date:

July 02, 2004

Filing Date:

December 19, 2003

Export Citation:

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Assignee:

HITACHI UNISIA AUTOMOTIVE LTD

International Classes:

F01L1/34; F16H53/02; F16H55/06; F16H55/30; (IPC1-7): F01L1/34; F16H53/02; F16H55/06; F16H55/30

Attorney, Agent or Firm:

Tsuyoshi Hashimoto
Hiromichi Kobayashi
Tomioka Kiyoshi

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