US1996909A - Engine - Google Patents

Description

April 9, 1935. R. N. DU Bols y Y ENGINE Filed May '7, 1932 IVENTOR.

Ff/7M 2V. Dago/'5 ATTORNEY.

Patented Apr. 9, 1935 Reith 'assigner to ,Y

y`Detroitj Mich.; a" corporati't'inr of Yiginia l u'y yBois;( lrrcsse Pointe Farmsyliich.; I

cntine'ntaly Motors Corperation,I

f Application May 7,

2 Claims.

This invention relates to internal combustion engines and refers more particularly to engines having sleeve valve means as distinguished from the more common poppet valve means. It is an object of-my invention to provide improved driving means for the engine sleeve valves.

My invention is particularly related to engines having at least a pair of longitudinally extending cylinder banks or rows, it being customary to have these rows positioned with a V arrangement, although the cylinder rows may have their axes parallel in certain instances. My invention is further particularly related to engines of the single sleeve valve type wherein a single sleeve valve associated with each engine cylinder is given a combined reciprocating and oscillating movement in performing the usual well known valving functions of the engine.

It is a further object of my invention to provide a `more eiicient, compact, and simplified drive especially adapted for operating single sleeve valves of the aforesaid type and particularly in connection with engines having V arranged cylinders. I desire it understood however, that my invention in its broader aspects is not limited to the aforesaid arrangement of cylinders land if desired, more than one sleeve valve may be associated with each cylinder and the sleeves may be operated with movements deviating from the aforesaid combined motion.

In carrying out the objects of my invention in its more limited aspects, I have provided a valve shaft arranged in the V, the valve shaft having a driving gear which meshes with a pair of sleeve driven gears, each sleeve gear operating a crank which is connected to the sleeve valve associated with one of the V arranged cylinders.

Further objects and advantages of my invention will be apparent as this specification progresses, reference being had to the accompanying drawing illustrating one embodiment of my invention, and in which:

Fig. 1 is a sectional elevational view transversely of the engine and illustrating a typical pair of V arranged cylinders,

Fig. 2 is an enlarged detail view of the driving means for a pair of associated sleeve valves, and

Fig. 3 is a detail plan View illustrating the brackets for supporting successive pairs of sleeve gears.

In the drawing I have illustrated my invention in connection with an engine of the V type wherein each cylinder has a single sleeve valve associated therewith of the aforesaid type. Thus, A

(Cl. 12S-81) represents the engine having a pair of cylinders I and II, it being understood that these cylinders are typical of the remaining cylinders of each row extending longitudinally of the engine. Within each cylinder is a sleeve valve B having intake ports I2 and exhaust ports I3 adapted to respectively cooperate with cylinder intake ports I4 and exhaust ports I5. Within each sleeve Valve B is a piston I6, and where the pairs of cylinders are V arranged as illustrated, the pistons I6 are connected in pairs to crankshaft I1 by reason of the usual connecting rod I8 and articulated rod I9.

Located preferably between the V formed by the cylinder rows, I have provided a valveshaft or layshaft suitably driven from crankshaft I1 as by sprockets 20, 2| and connecting chain 22. The layshaft C is provided at spaced points along its length with driving gears 23, one of which is shown in Figs. 1 and 2, the gears 23 being located between each pair of cylinders such as the pair I0 and I I. The gear 23 is preferably a worm gear and meshing with each gear is a pair of V arranged driven sleeve gears 24, 25, these gears being in the form of worm wheels. The sleeve gears 24, preferably lie in planes respectively and substantially parallel with the axes of the associated sleeve valve and cylinder and where the cylinders are V arranged these planes intersect at the axis of layshaft C as will be readily apparent. 'Ihe sleeve gears 24, and 25 are respectively supported by companion brackets 26 secured by bolts 21 to the supporting structure 28 of the engine. If desired, each bracket 26 may be formed with a separate plate 29 as best shown in Fig. 3 whereby each sleeve gear may be assembled as a unit in association with its related sleeve valve.

Each sleeve gear is mounted for rotation on its bracket 26, a ball bearing assembly 3!)` for substantially frictionless movement being provided and held in assembled relation with the bracket by reason of the nut 3 I. Each of the sleeve gears such as the gear 25 in Fig. 2 is provided with a crank 32 extending inwardly to the associated sleeve valve B, the latter having a driving lug 33 provided with a ball socket 34 for receiving the ball portion 35. The inner cylindrical bore 36 of the ball portion is adapted to slidably engage crank 32 so that during the oscillation of the sleeve valve as crank 32 is rotated, the ball portion will rock in its socket 34 and also slide on crank 32 to permit the aforesaid sleeve movement. In Fig. 2 the parts are shown for maximum 1nward movement of sleeve B associated with sleeve gear and the dotted line 35 indicates the maximum outward position of the ball portion when crank 32 has been rotated through an angle of degrees from the position illustrated.

D represents the crankcase structure, the cylinders I0 and Il opening outwardly therefrom generally above the crankcase structure with the engine and parts positioned as illustrated.

It will be apparent to those skilled in the art to which my invention pertains that various modications and changes may be made therein cylinder rows, sleeve valve means'associated'witht.

the cylinders, a valveshaft between said rows, a

gear driven by the valveshaft, apalr of gears-lengaging said rst gear, and means for driving the sleeve valve means of adjacent cylinders in said rows from said pair of gears, and a bracket for supporting each of said pair of gears.

2. In an engine, a pair of V-arranged cylinders,

.a sleeve valve for each cylinder adapted to move with combined oscillation and reciprocation, a sleeve gear adjacent each of said cylinders, means for driving the sleeves from said sleeve gears respectively whereby to impart the aforesaid move- A`ment to said sleeves, said sleeve gears extending in planes substantially parallel with the axis of the sleeve associated therewith, a valveshai't intermediate said V, said valveshaft having a drivingA gear meshing with said sleeve gears, and a supportingbracket for each of said 4sleeve gears.'

RALPH N. DU BOIS.

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