Nissan Motor Company Limited

Toshiki Ohara

Isaya Matsuo

Kaoru Haga

Suehiro Urabe

Takeshi Yamagiwa

Satoshi Shimano

Tohru Higashioka

A throttle valve device of a V-type internal combustion engine, comprising a mechanism for operating a throttle valve independently of an acceleration operation by an acceleration pedal. The mechanism includes a DC motor which is drivingly connected to the throttle shaft to control a slip ratio of a road wheel. The DC motor is located below a throttle chamber of the throttle valve device and arranged such that a drive shaft thereof is parallel with and opposite to a throttle shaft on which the throttle valve is mounted, thereby suppressing the width of the throttle valve device in the direction of the throttle shaft.

Throttle valve device of V-type engine

A suction system for a V-type engine includes branch pipes that cross parallel to each other for communicating with cylinders, two aggregate portions disposed inside center lines of opposed banks for aggregating the branch pipes which communicate with the cylinders without regard to the ignition order, two guide pipes connected to the aggregate portions in centers thereof, and a communicating pipe disposed over the branch pipes for communicating with the aggregate portions.

Suction system for internal combustion engine

In a V-type internal combustion engine, one bank of a cylinder block having cylinders which are offset more rearward of the engine than those of the other bank. A water pump has a pump housing installed on a front end of said one bank to define therebetween a pump chamber. The cylinder block has at a front end portion midway between the banks a coolant distributing chamber communicating with an outlet port of the pump chamber. The cylinder block has at the banks water jackets which are formed with, at respective front end portions by the side of the most forward ones of the cylinders, inlet ports opening laterally of the engine and communicating the coolant distributing chamber.

V-type internal combustion engine with improved water pump arrangement

In a V-type internal combustion engine, a timing chain is placed around and engaged with a pair of camshaft sprockets and a crankshaft sprocket. A water pump sprocket is disposed between one of the camshaft sprockets and the crankshaft sprocket and outside of an area bounded by the timing chain and engaged with the timing chain. A thermostat housing is provided integrally to a front end portion of one of the cylinder heads which is bounded by the water pump, the timing chain and a camshaft which is adjacent to an outer side of a bank and driven by one of the above mentioned camshafts. A cylinder block is provided with an engine mounting boss portion at a front end central portion thereof surrounded by the timing chain.

V-type internal combustion engine with improved water pump driving

In a V-type engine, a front casing is attached to a front end of a cylinder block and receives therewithin a sprocket and chain for transmission of engine power from a crankshaft to an oil pump. The front casing has at a peripheral portion on one side of cylinder block an oil pump mounting bracket which projects laterally outwardly of the cylinder block. The oil pump is installed on the oil pump mounting bracket in such a way as to be in a parallel relation to a crankshaft.

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Yokohama, Japan

Toshiki Ohara