Suzuki Kabushiki Kaisha

Suzuki Motor Corporation

Jun Itoh

Shuichi Hagino

Katsuhiro Fukuda

Toshio Watanabe

Satoru Takahashi

Shuichi Mishima

Hidetsugu Shimada

Yasushi Miyashita

Hiroyuki Maejima

Shigeo Unno

Masashi Takayanagi

Hiromichi Takewaki

Ryuji Tanaka

Hideo Koyama

Ryuji Hamada

Shigehisa Hamaguchi

Hiroo Yamauchi

An intake device for outboard motors, which makes it possible to improve intake performance and reduce the size of the device at the same time. Cylinder banks have a plurality of cylinder bores arranged in a vertical direction, and extend rearward to form a V shape. Intake ports of the respective cylinder bores are formed in the cylinder banks to open in the inner sides of the V shape. An intake manifold is connected to the intake ports. A surge tank is connected to the intake manifold. A throttle body is connected to the surge tank. The surge tank comprises a plurality of intake passage members connected to the respective cylinder bores via the intake manifold, wall members provided between respective adjacent ones of the intake passage members, and a lid member configured to hermetically close a space defined by the intake passage members and the wall members.

Intake device for outboard motors

A two-cylinder V-type OHV engine for outboard motors, which allows space saving in the direction of the width of the engine. A starboard side cylinder bank (RB) has a cylinder (R) and a port side cylinder bank (LB) has a cylinder (L). The first cylinder bank (RB) and the second cylinder bank (LB) are arranged to form a V-shape. A crankshaft (), a single camshaft (), and an idle gear () are disposed such that the crankshaft () drives the single camshaft () via the idle gear ().

Two-cylinder V-type OHV engine for outboard motors

An outboard motor is provided with a four-stroke-cycle engine and an oil pan disposed below the engine. In the arrangement of the oil pan, a lubricating oil reservoir is arranged on a front side of the oil pan, and an exhaust gas passage and a cooling water passage are arranged on the rear side of the lubricating oil reservoir.

Outboard motor

An outboard motor has a V-type engine in which in which a plurality of cylinders are arranged in a V-shape, a crankshaft is arranged substantially vertically, and an overhead valve (OHV)-type valve train is mounted. This outboard motor also includes an air intake system in which a carburetor is arranged above the engine and in a space of a V bank between the cylinders.

Air intake system of outboard motor

An outboard motor is mounted with a multiple-cylinder engine having cylinders to which intake air is distributed through the intake manifold unit of an intake unit, respectively. The intake manifold unit comprises an intake manifold body formed of a synthetic resin, an idling air control (IAC) valve for regulating a quantity of intake air into the intake manifold unit in an idling operation state, a valve holder to which the IAC valve is operatively connected in a floating manner, and an elastic member through which the IAC valve is mounted to the valve holder. The IAC valve, the elastic member and the valve holder are coupled integrally with each other and mounted to the intake manifold body in the floating state.

Intake manifold of outboard motor

An outboard motor is mounted with a multiple-cylinder engine and an intake air is distributed by an intake manifold to respective cylinders of the engine. The intake manifold is formed of synthetic resin and comprises a surge tank and a branch including a plurality of branch sections extending from the surge tank to the respective cylinders. The surge tank and the branch constitute an intake manifold body which is divided along a flow direction of the intake air flowing in the branch sections.

The present invention provides an engine holder structure for a four-cycle outboard motor such that rigidity of an assembled engine can be increased with a simple structure. In accordance with the present invention, the shaft center of a drive shaft is disposed offset from the shaft center of a crankshaft with an outboard motor where an engine mainly composed of a crankcase a cylinder block and a cylinder head is mounted on an upper portion of an engine holder a lower portion of which an oil pan is fixed to; a crankshaft is disposed substantially vertically inside the engine and the rotation of this crankshaft is transmitted to a propulsion device via a drive shaft

Engine holder structure for four-cycle outboard motor

An outboard motor includes an engine holder, an engine installed above the engine holder, an intake apparatus disposed on one side of the engine, and an electric equipment box and an exhaust apparatus both disposed on another side of the engine. The intake apparatus comprises a throttle body installed in a front portion of the engine, a silencer operatively connected to an upstream side of the throttle body, a surge tank disposed on one side of the engine, and an intake manifold operatively connected to the surge tank. The silencer extends around a front side of the engine towards the exhaust apparatus. The silencer is provided with an upstream end portion to which an intake port is formed to open rearward. The upstream end portion may be fixed to a wall portion of the electric equipment box and the upstream end portion of the silencer has a lower surface to which an intake port is formed so that it opens downward.

Intake apparatus of outboard motor

A cooling structure for an outboard engine having a cooling water piping of reduced length and simplified construction. In the outboard engine that cools its engine with cooling water to be led from the outside, a water check port is provided in the middle of its cooling water passage. Moreover, a vapor separator is provided on a fuel supply equipment. In addition, a water passage for the water check port is provided so as to branch in the middle of the cooling water passage for a vapor separator. As such, the cooling water is led to the vapor separator and the water check port is located at the inlet of the cooling water before cooling of the engine.

Cooling structure for outboard engine

An outboard motor includes an engine holder, an engine disposed above the engine holder and the engine includes a cylinder block provided with a plurality of cylinders, a cylinder head disposed behind the cylinder block and a crankcase, a cam chain case through which said engine is mounted on the engine holder, and an exhaust apparatus operatively connected to the cylinder head. The exhaust apparatus includes an exhaust passage formed to the cam chain case, an exhaust manifold connected to the cylinder head, a water jacket formed to the exhaust manifold and another water jacket formed to the exhaust passage. The exhaust passage is formed at a portion near a central portion of the engine having most wide width in association with a lower end portion of the exhaust manifold.

Exhaust apparatus of outboard motor

An outboard motor is equipped with an engine, an engine holder, an oil pan disposed below the engine in a state of the outboard motor being mounted to a hull, a water pump disposed below the oil pan, and a cooling water passage structure. The cooling water passage structure includes a vertical cooling water passage vertically passing through inside the oil pan and communicated with the side of the engine, a lateral cooling water passage extending in a lateral direction along a bottom surface of the oil pan, a cooling water supply pipe extending upward from the water pump and connected to a side of the engine, and a water pressure relief valve provided for the lateral cooling water passage for controlling a pressure increasing of the cooling water. The lateral cooling water passage has one end communicated with a lower end of the vertical cooling water passage and has another one end to which an upper end of the cooling water supply pipe is connected.

Cooling water passage structure of outboard motor

An outboard motor includes an engine holder, an engine disposed above the engine holder in an installed state of the outboard motor, a flywheel magnet device disposed above the engine, an oil filter disposed on a side portion of the engine, an electric equipment box, an air suction device, an exhaust device and a fuel supply device, these electric equipment box, suction device, exhaust device and fuel supply device being arranged around the engine, and an engine cover covering the engine. The air suction device is composed of a throttle body, a surge tank and an intake manifold including a plurality of branch members extending from the surge tank, the intake manifold is disposed vertically, in the installed state, on one side of the engine so that the intake manifold is located between the flywheel magnet device and the oil filter as viewed from a side portion thereof and the intake manifold has at least a portion superposed on the flywheel magnet device and the oil filter as viewed in a plan view. The electric equipment box and the exhaust device are disposed on another side of the engine opposing to the side on which the intake manifold is disposed.

Growing community of inventors

Hamamatsu, Japan

Jun Itoh