Combustion System For Many Oil Fuels
Page 60
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TifIE Bagnulo combustion system for 1 oil engines is well known on the Continent, where its ability to operate on almost any fuel, those of vegetable origin especially, is of interest owing to tne fiscal policies besetting the oil industries. The system is described in patent No. 434,631, by A. Bagnulo, 54, rue Armand Sylvestre Courbevoie, Some, France. Although permitting the use of any fuel, the scheme employs spark ignition and uses a compression ratio of 61 to 1.
Referring to the accompanying drawing, a twin-fuel carburetter (5) supplies either petrol or heavy oil, according to the poaition of a two-way cock. (1). This: cock is connected' to the air throttle (3) and performs the double function of fuel changing and quantity regulation, the change-over from light to heavy luel being a gradual process, dependent on the engine speed. Under suction from the piston, the carburetter
supplies a rich .mixture is fed into . a • :spherical hot-bulb by a mechanically .operated. valve (2), In this,bulb the fuel is completely. gasified (in a rich state) and is brought to cornbustible proportions during the compression stroke by ailfrom the cylinci.:r, whith arrives via a verituri (4). Ignition is then effected by a sparking plug located in the spherical chamber.
An Automatic Hydraulic Valve-gear Adjuster.
To take up by hydraulic means all slack in the valve rocker gear is the object of the. invention shown in patent No. 436,744 by G. Roesch and Clement Talbot, Ltd., Barlby Road, London, ' Wit). . Referring to the a:companying drawing, the rocker is pivoted about a fulcrum piece (2)
formed at its upper end into a piston member (4). This piston moves in a blind cylinder, the end "wall of which is adjustable ; the operating fluid is oil from the engine-lubrication system, supplied from a conduit (1).
In operation, the pressure fluctuation caused by the working of the valves exercises a pumping action on the piston; this sucks oil past the ballvalve (5) and traps it in the blind end of the cylinder. Thus' the piston is at n46
all times kept pressed on to the rocker, whilst a further cushioning effect is given by oil supplied down:. the bore. .(3) feeding the lower end of the fulcrum.
CAn Accumulator LAIMED to be 7 specially suitable Injection Pump.'
for high-speed engines, an injection pump operating on the accumulator principle is shown in patent No. 437,328 by C. H. Clausen, 75, Frej: gatan, Stockholm, Sweden. The pump consists of the con-, ventional plunger (4), which, on the up stroke, forces a measured quantity of fuel past the one-way valve (7). From this point, the fuel is led to a storage cylinder (2), the pic ton of which is under pressure from powerful springs (3). This piston is forced down by the fuel, and uncovers a port (I) which crosses the main cylinder
(4). While the main plunger is up, this port ,is closed, but upon the descent a groove (6) establishes connection to the nozzle line (6).
Unlike a conventional pump, the actual moment of injection in this system occurs on the down stroke, a , feature which is claimed to ensure accuracy of timing, irrespective of the quantity injected. Furthermore, owing to the absence of any need for a quick lift, an eccentric can be used instead of a cam, the gentler motion of which will reduce noise and wear. The flat shown on the eccentric in the drawbig is described as being desirable for only slow-speed engines.
A New Trailersteering System.
FROM the number of Continental patents dealing with vehicles having a central tubular chassis member, it Would appear. that this :57,s:: tem is of growing, imr. pc:Aar-ice. Vatent. No. 437,222, by Tatra Works,..Ltd., of P r a g u e Smichov, Czechoslovakia, deseribes a noVel system of steering applied to a trailer with a
central member of this type: The aim of the' invention is to permit of any steering angle up to 90 degrees, without the necessity of the wheels passing under the central tube. As will be seen from the accompanying drawing, the scheme employs a swivel
ling front axle in conjunction with stub axles at tla outer ends. The main -axle carries a projection (2) in which the king-pin (1) is housed; for running purposes this projection is locked to the chassis, so that steering is performed entirely by the stub axles. When an increased degree of manceuvrability is required, however, the locking device is re:eased, and the axle itself may he swung to the extreme position shown in the drawing which appears above.