Internal-combustion engines – Charge forming device – With fuel pump
Patent
1997-08-22
1999-11-30
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
With fuel pump
123 544, 123149R, 123195R, F02M 3704
Patent
active
059923938
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a V type diesel engine having cylinders disposed in a V shape as seen from a front view, which is so constructed as to be adapted to either a vertical type having a vertical crankshaft or a horizontal type having a horizontal crankshaft.
There are conventional constructions of V type diesel engines disclosed in the Japanese Laid-Open Gazette No. Hei 6-299862 and the German Patent No. 966708, for example.
The V type diesel engine in the Japanese Laid-Open Gazette No. Hei 6-299862 has a camshaft for intake and exhaust cams which are apart from a fuel injection pump. Particularly, a camshaft for the fuel injection pump driving cams is different from the camshaft for intake and exhaust cams. Accordingly, the V type diesel engine, which requires two camshafts, tends to be excessively large in the total height thereof.
In the V type diesel engine shown in the German Patent No. 966708, a single camshaft is provided for both fuel injection pump driving cams and intake and exhaust cams. However, a governor device is not disposed between cylinders which are disposed in a V shape.
SUMMARY OF THE INVENTION
According to the present invention a V type diesel engine has cylinders HL and HR disposed in a V shape as seen from a front view, and between cylinders HL and HR are disposed intake and exhaust cams 31 and fuel injection pump driving cams 30, a fuel injection pump P, a governor device G, pushrods 24 and fuel injection nozzles 26 and 27. Both intake and exhaust cams 31 and fuel injection pump driving cams 30 are disposed on a single camshaft 1 instead of two different camshafts, and fuel injection pump P and governor device G are disposed on a side opposite to a crankshaft S of camshaft 1, whereby the entire V type diesel engine has a compact form.
A starter K is disposed on one side of cylinders HL and HR and supplementary devices N are disposed on the other side thereof so that vacant spaces of recesses on both sides of a crankcase 2 can be used effectively in comparison with such a conventional construction that a starter and supplementary devices, like an operating oil pump, are concentrated in a recess on one side of a crankshaft.
Fuel injection pump driving cams 30 on camshaft 1 are disposed behind intake and exhaust cams 31 and on a side opposite to a gear case 3, and governor device G is disposed on the same side of gear case 3, so that a top of engine is lowered and a driving line of gears is simplified in comparison with a conventional construction having two camshafts disposed vertically.
Fuel injection pump P is disposed on an extending portion of a governor case A housing governor device G so as to integrate fuel injection pump P and governor device G in governor case A, thereby easing adjustment of fuel injection pump P and assembly thereof and obviating disposition of a fuel injection pump case.
Fuel injection nozzles 26 and 27 are disposed between intake and exhaust valve driving pushrods 24 which are disposed in a V-shaped bank, so that the width of engine can be smaller and both sides of cylinders are used effectively.
Starter K is disposed on one side of cylinders HL and HR and supplementary devices N are disposed on the other side thereof so that starter K and supplementary devices N are disposed, instead of projecting, respectively in recesses on both sides of the crankcase which are naturally formed in a V type diesel engine. A lubricating oil filter L is disposed on the same side with supplementary devices N, thereby compacting the entire V type diesel engine.
On a camshaft 1, fuel injection pump driving cams 30 are disposed between intake cams 31 and exhaust cams 31, fuel injection pump P is disposed above fuel injection pump driving cams 30, and governor device G is disposed on the same side of the gear case 3, so that governor device G, fuel injection pump P and a cylinder block are disposed in simple a construction.
Crankcase 2 has an opening end, gear case 3 and governor case A, which constitute an engine body, and is made b
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patent: 4412513 (1983-11-01), Obermayer et al.
patent: 5479903 (1996-01-01), Werner et al.
patent: 5564395 (1996-10-01), Moser et al.
Miyazaki Manabu
Murakami Osamu
Yoshida Kunio
Moulis Thomas N.
Yanmar Diesel Engine Co. Ltd.
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