Mazda Motor Corporation

Hidesaku Ebesu

Ryotaro Nishida

Shuhei Tsujita

Toshihiko Hirata

Toshimichi Akagi

Ken Yoshida

Naoki Nagano

Taketoshi Yamauchi

Mitsunori Wasada

Kouichi Shimizu

Tatsuya Koga

Jiro Kato

Hisayuki Yamane

Masafumi Nakano

Hiroyuki Oda

Yasushi Nakahara

Masami Nishida

Hiroaki Deguchi

Hirokazu Matsuura

Masaaki Sato

Tsuyoshi Yamamoto

Tsukasa Hoshino

Mitsutaka Yamaya

Eiji Takano

Setsuo Harada

Hirofumi Shinohara

Yoshihiro Hamazume

Masakazu Tokuyama

Keiichi Tateishi

Kouji Asanoumi

A bottom surface of a surge tank has such a shape that, in a vehicle-mounted state, the bottom surface is positioned below a lower surface at an upstream end of each of a plurality of independent passages and comes closer to the lower surface at the upstream end of each of the plurality of independent passages in a vertical direction farther away from a connected portion between the surge tank and a third passage in a cylinder array direction.

Air intake passage structure for multi-cylinder engine

The present disclosure provides sufficient support rigidity of a supercharger and an intercooler, while reducing an increase in the overall height of an engine. The supercharger extends along a cylinder bank at a side of a surge tank, and is fixed to an intake manifold. The intercooler is located below the supercharger. A case of the intercooler is connected to a discharge port of the supercharger and an intake air introduction pipe of the intake manifold.

Engine with supercharger

An air intake passage () has a third passage () that connects an intercooler () and a bottom portion of a surge tank () such that the intercooler () is positioned below the surge tank (). A pair of wall portions () configured to catch moisture is formed in a section from an upstream end portion of the third passage () to a connected portion between said third passage () and the surge tank ().

Air intake passage structure for engine

The present disclosure aims to improve circulation of intake air and distribution of bypass intake air to cylinders, while reducing an increase in the overall height of an engine. A supercharger extends along a cylinder bank at a side of a surge tank extending along the cylinder bank. A bypass pipe branching off from an upstream intake pipe configured to introduce the intake air into the supercharger extends along the cylinder bank above the supercharger. A downstream side intake pipe configured to guide the intake air from the supercharger to the surge tank extends downward from the supercharger. The downstream intake pipe is, in a U-shape as viewed along the cylinder bank, connected to the surge tank.

Engine with supercharger arrangement

The present disclosure aims to stabilize, in an engine with a supercharger, a detection result of an intake air temperature sensor interposed between the supercharger and an intercooler. A gas outlet of a supercharger and a gas inlet of an intercooler are connected together via a second passage. The second passage includes, in its middle position, a narrow region with a smaller cross-sectional area than the part of the second passage extending from an upstream end of the second passage to the middle position. The narrow region is provided with the intake air temperature sensor configured to detect the gas temperature in the narrow region.

Structure of mounting intake air temperature sensor of engine with supercharger

Substances in external EGR gas are smoothly guided to a combustion chamber. An intake passage includes: a main intake passage including intake ports and communicating with a combustion chamber and having a supercharger interposed in the main intake passage; and a bypass passage branching off from the main intake passage upstream of the supercharger, and connected downstream of the supercharger; a flow rage adjustment valve changing a cross-sectional flow area of the bypass passage. The bypass passage is provided above the main intake passage, and includes an upper passage to which an EGR passage is connected.

Intake and exhaust device for automotive engine

A supercharged engine is provided, which includes an engine body having cylinders, an intake passage disposed outside the engine body and connected to the cylinders via intake ports, a supercharger provided in the intake passage and spaced apart from an intake-side side surface of the engine body, the intake-side side surface being connected to the intake passage, and a fuel pump disposed on the intake-side side surface. A portion of the intake passage constitutes an intervening part located between the supercharger and the engine body. The intervening part overlaps with the fuel pump in one of vertical and lateral directions of the engine body.

Supercharged engine

Disclosed is an upper structure of an engine having three or more cylinders arranged in a row. A first one of a pair of adjacent cylinders among at least three of the cylinders serially arranged in a cylinder row direction is provided with a second spark plug at a position on an opposite side of a second one of the pair of adjacent cylinders, and the second one of the pair of adjacent cylinders is provided with a second spark plug at a position on an opposite side of the first one of the pair of adjacent cylinders. The present invention can provide enhanced flexibility in design of a head cover of the engine.

Upper structure of engine

A cylinder head includes a carrier member integrally formed with a vertical wall portion for supporting a camshaft a tappet guide for containing a tappet and a tappet-lubricating oil receiving portion slanted around the tappet guide An operation-oil supply passage extends in the longitudinal direction of the carrier member inside the tappet guide

Cylinder head structure

An engine cooling apparatus capable of assuring an adequate air-water separating function in an arrangement wherein an air-water separating tank having a pressure valve is provided at a point along a coolant passageway. The apparatus has a closed circulating system constructed from an engine, a radiator and a coolant passageway connecting the engine and radiator, wherein, a coolant for cooling the engine is made to circulate in the closed circulating system from upstream to downstream, and air which mixes with the coolant is discharged outside the closed circulating system. The apparatus includes a branch passageway which branches off from a first intermediate portion of the coolant passageway and merges with the coolant passageway at a second intermediate portion thereof that is downstream of the first intermediate portion, and an air-water separating tank arranged in an intermediate portion of the branch passageway and having a pressure valve which opens to the atmosphere at a prescribed pressure in order to discharge the air to the outside of the closed circulating system.

Engine cooling apparatus

A V-type engine is constructed so that one bank of cylinders is located rearward, in a longitudinal direction of the engine, relative to the other bank of cylinders so that a space is formed in front of a front surface of a cylinder block of the engine. In the space, a casing or casings for a fluid passage are provided. Supplemental apparatuses, such as a water pump, an alternator, a compressor, and an oil pump, are formed so as to be driven by belts transmitting drive power from a crankshaft of the V-type engine. One of the belts has tension applied to it by a tensioner, which is formed on a bracket. The bracket is fixed to the casing or casings by bolts, which are used for both fixing the casing or casings to the cylinder block and for fixing the bracket to the casing or casings. As a result, both of the bracket and the casing or casings are firmly fixed to the cylinder block within a compact space, even when the tensioner is located far from the front surface of the cylinder block.

Arrangement for driving at least one supplemental apparatus of a V-type

A V-shaped engine has an inlet passage and an outlet passage for coolant. The inlet passage for introducing coolant to a water pump mounted to a front face of a cylinder block of the engine is arranged vertically in a space between a right bank and a left bank. The outlet passage is so arranged as to pass between a timing belt idler provided forwardly of the space between the right bank and the left bank and the inlet passage. This arrangement of the inlet passage and the outlet passage enables the V-shaped engine to be made compact.

V-shaped engine

A camshaft driving device for use in an internal combustion engine having a cylinder block, a cylinder head disposed on the cylinder block, a driving shaft rotatably mounted at the lower portion of the cylinder block and at least one camshaft rotatably mounted at the upper portion of the cylinder head, wherein a mounting boss for mounting the reduction gear thereon is formed on an upper deck disposed on the cylinder block, while a driving force from the driving shaft is transmitted to the camshaft through the reduction gear. A transmitting portion of the reduction gear on the side of the camshaft is outwardly disposed from the engine as compared with another transmitting portion thereof on the side of the driving shaft and the transmitting portion of the latter is disposed in a space immediately below a journal boss formed at the upper portion of the cylinder head for rotatably mounting the camshaft therein.

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Hiroshima, Japan

Hidesaku Ebesu