Nippondenso Co., Ltd.

Denso Corporation

Hiromasa Aoki

Senta Tojo

Tetsuya Toyao

Takeshi Matsui

Toshiki Matsumoto

Tetsuya Nakamura

Shigeru Maehara

Tatsuya Fujita

Masatoshi Kuroyanagi

Shuichi Matsumoto

Kanehito Nakamura

Ken Uchiyama

Takashi Iwanaga

Kinji Hodaira

Hisaharu Takeuchi

Yukinori Miyata

Yushi Fukuda

Shinji Ueda

Atsushi Okajima

Masato Nakagawa

Naoki Nagata

Michiharu Miyata

In a fuel injection valve, a flow-out passage is provided on a downstream side thereof with an out-orifice. The out-orifice is provided around a periphery of an inlet opening thereof with an inlet circumferential edge with which a flow of fuel to be ejected from a pressure control chamber via the out-orifice is swirled so that turbulent flow is forcibly formed. Then, the turbulent flow is maintained until the fuel is ejected. Dimensions of the out-orifice satisfy the formulas, R/D&lE;0.2 and L/D&lE;1.2, where R is corner radius of the inlet circumferential edge of the out-orifice, D is inner diameter thereof and L is axial length thereof. Accordingly, fuel injection is stable with less fuel amount fluctuation in each cycle even when fuel pressure and temperature are relatively low.

Fuel injection valve

Pressurized fuel of a common rail is introduced into a control chamber of a fuel injector. An electromagnetic valve opens or closes a fuel discharge passage of the control chamber to adjust a hydraulic pressure of the control chamber. Through a switching leak passage, bubble-containing fuel directly returns from a valve opening of the electromagnetic valve to a low-pressure return passage without passing through an armature chamber. Through a stationary leak passage, the fuel leaking from every slide portion returns to the return passage via the armature chamber. A downstream portion of the stationary leak passage opens to the upper portion of the armature chamber. A damper element is provided downstream of the electromagnetic valve in the return passage for canceling an increased fuel pressure.

Accumulator fuel injection apparatus

It is the primary object of the present invention to provide a catalyst converter which can hold a sufficient amount of catalyst to raise the temperature thereof to the catalyst activation temperature in a short time without enlarging the metal carrier itself. The metal carrier 1 is arranged in the course of an exhaust manifold 3 of an engine 2 and is composed of an alternating winding of a flat sheet 7 and a corrugated sheet 8, wherein slit parts 9 are formed in the flat sheet 7 and the corrugated sheet 8 of the metal carrier 1 in an end portion thereof, on the side the engine 2.

Metal carrier

In a metal catalyst converter configured of the metal catalyst carrier that holds the catalyst into the honeycomb body created by alternately winding flat sheet and corrugated sheet, a plurality of slit matrix that extend in the direction perpendicular to the exhaust gas direction were arranged on at least one part of the upstream side of the exhaust gas passage. By that a low heat capacity and high heat transfer area in regard to the downstream side of the exhaust gas passage was formed. The upstream portion of the metal catalyst converter on which slit matrix was formed was configured to be covered by outer casing having an air insulation layer. The upstream side of this outer casing was held and fixed to the exhaust gas passage.

Honeycomb body and catalyst converter having catalyst carrier configured

A self-heat generating type honeycomb filter is mounted in an exhaust pipe line of an engine, and a plane plate and a corrugated plate are layered, then wound, and the first slit portion and second slit portion having openings, respectively, are formed between an up-stream and down stream side end portions of the plane and corrugated plates. An electric current is applied between the up-stream and down stream side end portions, to heat the first and second slit portions. Accordingly, a self-heat generation type catalytic converter capable of realizing both high resistance and low thermal capacity, and further ensuring a reduction in thermal conduction, and durability, and raising the temperature up to the sufficient level with less power consumption, can be provided.

Self-heat generation type honeycomb filter and its apparatus

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Nagoya, Japan

Hiromasa Aoki