Nissan Motor Company Limited

Kaoru Haga

Isaya Matsuo

Toshiki Ohara

Tohru Higashioka

Satoshi Shimano

A V-type internal combustion engine comprises a plurality of hydraulically actuable valve operation mode control actuators for two cylinder banks. A hydraulic fluid network is fluidly disposed between a main gallery of the cylinder block and the plurality of hydraulically actuable valve operation mode control actuators and includes a single control valve. The single control valve is common to all of the plurality of hydraulically actuable valve operation mode control actuators. This control valve is attached to a casing adapted to receive a drive system connecting the engine camshafts to the engine crankshaft. This casing has internal passages forming a part of the hydraulic fluid network between the control valve and the plurality of hydraulically actuable valve operation mode control actuators.

Arrangement of variable valve timing control system on V-type 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.

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Kanagawa, Japan

Kaoru Haga