Kabushiki Kaisha Toyota Chuo Kenkyusho

Kenji Fujikake

Haruo Katagiri

Katsuhito Yamada

Yoshinori Idota

Katsuyuki Ohsawa

Katsuhiko Sugiyama

Hiroshi Aoki

Yutaka Yokoi

Masaaki Ochi

A turbocharger of the present invention is provided with a thermo-reducing means between the turbine housing and the bearing housing in order to reduce the heat transferred from the turbine housing to the bearing housing. The thermo-reducing means comprises a thermo-isolating means such as an annular member made of a low heat conductive material. Also, the annular member contacts with the wall of the turbine housing which has a high thermal resistance, so that the heat transferred from the turbine housing to the connecting portion is reduced. The thermo-reducing means also comprises a sensible heat reducing means which is composed of a layer made of a low conductive material, on the inner surface of the wall of the turbine housing, preventing the heat transferred from the exhaust gas to the wall, and a layer made of a high emissive material, on the outer surface of the wall of the turbine housing radiating out the heat effectively. The turbine housing of the sensible heat means has the lower heat capacity compared with that of the bearing housing to reduce the sensible heat of the turbine housing.

Turbocharger

A fuel vaporizer for internal combustion engines is disposed at a suitable position in an intake passage of a carburetor or an intake manifold. The fuel vaporizer comprises a heating cylinder installed in registry with a barrel of the carburetor or a heating plate embedded in a wall of the intake manifold. The heating cylinder or plate includes a base body of electrically and thermally insulative ceramics coated on a surface thereof with a thin film of electrically resistive material such as metal capable of being heated when an electric current flows therethrough, the thin film lying substantially flush with the wall of the intake passage and being electrically connected to a power supply via a switch. When the heating cylinder or plate is heated, it effectively and reliably evaporates fuel in liquid phase flowing down the intake passage into contact with the heated thin film.

Fuel vaporizer for internal combustion engines

A jet control type carburetor according to the present invention includes an intake pipe having an intake passage formed in an inner wall thereof, the intake passage allowing an intake air to flow therethrough; a venturi provided in the intake pipe, for controlling flow velocity and pressure of the intake air in the intake passage; a fuel nozzle opened into the intake passage and connected to a fuel supply source through a fuel passage for sucking the fuel within the intake passage from the fuel nozzle in order to introduce the mixture of air and fuel within the intake passage; a throttle valve provided downstream of the venturi, for controlling the flow rate of the mixture of intake air and fuel; a control fluid nozzle opened into the intake passage and connected to a fluid supply source through a control fluid passage for jetting the flow of the control fluid to the fuel spurted from the fuel nozzle to afford the kinetic energy of the control fluid to the fuel, and a throttle means provided upstream of the control fluid nozzle in the control fluid passage, for controlling the flow rate of the control fluid; whereby the fuel flow rate and the mixing condition of the fuel and the air are controlled with high stability and response by the kinetic energy of the control fluid so that the exhaust gas purification and the fuel consumption are improved by controlling accurately the air-fuel ratio of the intake mixture.

Jet control type carburetor

A jet control type carburetor according to the present invention includes an intake pipe having an intake passage formed in an inner wall thereof, the intake passage allowing an intake air to flow therethrough; a venturi provided in the intake pipe, for controlling flow velocity and pressure of the intake air in the intake passage; a fuel nozzle opened into the intake passage and connected to a fuel supply source through a fuel passage for sucking the fuel within the intake passage from the fuel nozzle in order to introduce the mixture of air and fuel within the intake passage; a throttle valve provided downstream of the venturi, for controlling the flow rate of the mixture of intake air and fuel; a control air nozzle opened into the intake passage and connected to an air supply source through a control air passage for jetting the flow of the control air to the fuel spurted from the fuel nozzle to afford the kinetic energy of the control air to the fuel; and a throttle means provided upstream of the control air nozzle in the control air passage, for controlling the flow rate of the control air. The control air nozzle has a predetermined inner diameter (d.sub.a) and is provided at a portion apart from the fuel nozzle with a predetermined spacing (W), and a dimensional relationship of the spacing W between the fuel nozzle and the control air nozzle to the inner diameter (d.sub.a) of the control air nozzle is set as follows:

Jet control carburetor

An axial flow fan having auxiliary blades which includes a hub rotatably supported and driven by a drive source, a plurality of fan blades extending radially outwardly from the hub and at least one auxiliary blade projecting from an outer part on a suction and/or pressure surface of the fan blade and extending in the chord-length direction in such a manner that the leading region of the auxiliary blade is located nearer to the central axis of the fan than the trailing region thereof. A supplementary angle .theta..sub.0 of an angle formed between a chord line connecting to a leading edge and a trailing edge of the outer auxiliary blade and a reference line decided by the shape or operation of the fan blade has the relation; 5.degree..ltoreq..theta..sub.0 .ltoreq.40.degree.. A supplementary angle .theta..sub.N of an angle formed between a chord line connecting to a leading edge and a trailing edge of the inner auxiliary blade and a reference line decided by the shape or operation of the fan blade also has the relation; 18.degree..ltoreq..theta..sub.n .ltoreq.50.degree.. The axial flow fan serves to produce a strong radial flow by auxiliary blades of the optimum positional relation as described and improves the aerodynamic performances of the fan such as the air flow rate, efficiency and noise level.

Axial flow fan with auxiliary blades

An axial flow fan having an auxiliary blade wherein a hub member is rotatably supported and driven by a drive source, a plurality of blades are provided having a predetermined angle with respect to the rotational direction thereof and a predetermined width and height, the blades being radially provided on the hub member, and at least one auxiliary blade is disposed on at least one of a suction and pressure surface of the blades and extends beyond an end portion of a trailing edge thereof and substantially within a predetermined length in the width direction of the blade of the surface thereof, a leading edge of the auxiliary blade being positioned closer to an axis of the fan than a trailing edge of the auxiliary blade. The axial flow fan having such an auxiliary blade increases the radial flow by the extending portion of the auxiliary blade.

Axial flow fan having auxiliary blade

An axial flow fan having auxiliary blades comprises a hub member rotatably supported and driven by a drive source, a plurality of main blades having a predetermined angle with respect to the rotational direction thereof and a predetermined width and height, the main blades being radially provided on the hub member, at least one auxiliary blade formed on at least one of a suction surface and a pressure surface of each main fan blade and having a predetermined length in the width direction of the main fan blade, a leading edge of the auxiliary blade being positioned closer to the axis of the main fan blade than a trailing edge of the auxiliary blade, a shroud comprising a thin hollow member having a large opening and a small throttled opening at opposite ends thereof, and the main fan blade being inserted within the shroud from the small throttled opening toward the large opening of the shroud. An axial inserted width L of the main fan blade, which is defined by a point of minimum opening of the small throttled opening and an inserted end portion of the inserted main fan blade in the axial direction, and an axial entire width W of the main fan blade are maintained in the following relation:

Axial flow fan having auxiliary blades

An axial flow fan includes a plurality of auxiliary blades disposed upon and projecting from the suction and/or pressure surfaces of primary fan blades radially disposed on a hub member. The auxiliary blades extend substantially in the width direction or transversely of the primary blades, and the leading edges of the auxiliary blades, as viewed in the rotational axis direction of the fan, are disposed closer to the rotational center of the hub member than the trailing edges of the auxiliary blades. In this manner, the axial flow fan produces an axial fluid flow by means of the primary blades and a radial fluid flow by means of the auxiliary blades.

Growing community of inventors

Nagoya, Japan

Kenji Fujikake