Mazda Motor Corporation

Hiroshi Sumimoto

Yasushi Niwa

Fusatoshi Tanaka

Toshikazu Kurokawa

Kazuya Niida

Kazunori Hirabayashi

Tomohiro Sunada

Kenya Ishii

Mitsuhiro Nakajima

Yoshihiro Nakagawa

Tadao Suemori

Hirohisa Shirai

Takayuki Tanaka

Hiroshi Komatsu

Shinichiro Tagami

Takashiga Tokushima

Present application discloses fuel supply device which includes: fuel injection valves respectively arranged on center axes of cylinders, fuel injection valves being configured to inject fuel into the cylinders; fuel distribution portion configured to distribute fuel to fuel injection valves; and fuel supply tubes configured to form supply paths for fuel from fuel distribution portion to fuel injection valves. Fuel distribution portion includes connection portions arranged in arrangement direction so as to be connected to fuel supply tubes. Connection portions include pair of reference connection portions situated at positions distant from each other in arrangement direction by distance between respective bore center axes of cylinders. Fuel supply tubes include pair of fuel supply tubes respectively connected to pair of reference connection portions and two fuel injection valves on two cylinders arranged adjacently to each other. Pair of fuel supply tubes have a common shape.

Fuel supply device for engine

A fuel supply system for an engine having a plurality of cylinders is provided, which includes a plurality of fuel injection valves configured to inject fuel into the cylinders in a given order, a first distribution pipe configured to distributingly supply fuel to some of the plurality of fuel injection valves of which the fuel injection orders are not successive in the given order, a second distribution pipe configured to distributingly supply fuel to a remainder of the plurality of fuel injection valves of which the fuel injection orders are not successive in the given order, a fuel pump part configured to discharge fuel, a first feed pipe connecting a first discharge part of the fuel pump part with the first distribution pipe, and a second feed pipe connecting a second discharge part of the fuel pump part and the second distribution pipe.

Fuel supply system for engine

An engine equipped with a turbo supercharger has an exhaust manifold coupled to an engine body, a turbo supercharger including a turbine housing demarcating a turbine chamber and a supply path of exhaust air, and a turbine insulator covering the same, and a manifold insulator covering at least the upper surface of the exhaust manifold and the side surface of the exhaust manifold on the turbo supercharger side. The exhaust manifold has a flange as a connection section with respect to the turbo supercharger. The manifold insulator has a cut-away section exposing a joining surface of the flange, and an opening caused by having the interval between the cut-away edge of the cut-away section and the outer peripheral edge of the flange be relatively wider in a predetermined position than in other positions.

Engine equipped with turbo supercharger

A turbocharger engine includes an engine body and a turbocharger. The turbocharger includes a large turbo unit having a large turbine chamber, a large compressor chamber, and a large turbine shaft extending between the two chambers; and a small turbo unit having a small turbine chamber, a small compressor chamber, and a small turbine shaft extending between the two chambers. The large compressor chamber is disposed upstream of the small compressor chamber in an intake passage. A large turbo axis and a small turbo axis are disposed to extend generally in the same direction as an engine output axis. The large turbo unit is disposed such that the large turbo axis is non-parallel to the engine output axis, and a large-compressor-chamber-side portion of the large turbo axis is closer to the engine output axis than a large-turbine-chamber-side portion thereof in a plan view in an axis direction of the cylinder.

Turbocharger engine

To improve the efficiency of assembling multiple on-off valves into a manifold body and reduce resistance to rotation of a shaft after assembly, frame members ( ) are fitted in downstream end portions of individual intake passage sections ( ) of a manifold body ( ), on-off valves ( ) are placed inside the individual frame members ( ) and a shaft ( ) is passed through the on-off valves ( ) in such a way that the frame members ( ) constitute parts of inside walls of intake passages where the on-off valves ( ) are located, the frame members ( ) rotatably supporting the on-off valves ( ) and the shaft ( ). A cutout ( ) is formed in a surrounding wall of each frame member ( ), thereby making each frame member ( ) expandable and compressible by elastic deformation. Protruding walls ( ) swelling outward on both sides of the cutout ( ) are formed on each frame member ( ), and a recessed part ( ) for accommodating the protruding walls ( ) is formed in a wall surface of each intake passage section ( ) of the manifold body ( ). Further, there is formed a guide rail ( ) which fits in the cutout ( ) in the recessed part ( ).

Intake manifold of engine

A four cycle, 12-cylinder engine includes four cylinder groups each having three cylinders located adjacent to each other. The cylinders in each cylinder group have intake strokes which are apart one from another by 240.degree. in terms of angle of rotation of the engine crankshaft. The cylinders in each cylinder group are connected through respective branch intake passages with a common intake passage. Means is provided for separating the common intake passage of one cylinder group from the common intake passage of another cylinder group.

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Aki-gun, Japan

Hiroshi Sumimoto