ELECTRIC AIR FLOW CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINES

WIPO Patent Application WO/2015/025576

A1

The purpose of this invention is to achieve an electric air flow control device comprising a motor rotor bearing structure having excellent wear resistance even with loads from striking caused by a high vibrational environment specific to an internal combustion engine. A cylindrical sintered metal slide bearing is used in at least one of a front bearing (16) and a rear bearing (17) that support a rotor shaft (14) of a motor (3) that is the rotary control drive source of a throttle valve (7) that controls the intake air flow to an internal combustion engine, and the bearing design is such that the relationship of the radial crushing strength and the compressive deformation rate of the cylindrical sintered metal bearing has the mechanical properties of a maximum radial crushing strength of 230 N/mm2 or greater and a maximum compressive deformation rate of 3.5% or greater at the maximum radial crushing strength.

HIRANUMA DAISUKE (JP)
MOKUO MASAHIRO (JP)
OJIMA KAZUO (JP)
BABA NOBORU (JP)

PCT/JP2014/063767

February 26, 2015

May 26, 2014

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

C22C9/02; F16C33/12; F02D9/10; F16C33/06

JPH11256206A	1999-09-21
JP2004153914A	2004-05-27
JP2006022896A	2006-01-26
JPH05202923A	1993-08-10
JP2001107162A	2001-04-17
JP4749260B2	2011-08-17

"Bearing for electronic control throttle", NTN TOKUSYUGOUKIN KABUSHIKIGAISYA HOMEPAGE INFORMATION: PRODUCT INTRODUCTION
"Catalog of sintered alloy Nickalloy material specification", August 2005, HITACHI POWDERED METALS CO., LTD

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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