Патент USA US2108422код для вставки
Feb. 15, 1938. I c. K. WOODMAN 2,108,422 SYNCHRONIZING INTERNAL COMBUSTION ENGINE Filed Sept. 28, 1936 4,2 I8 16" 38 17 12 37 a2 13 11 14 '30 In venfor" 3,4 Patented Feb. 15, 1938 2,108,422 _ UNITED STATES PATENT OFFICE 2,108,422 SYNCHRONIZING INTERNAL COMBUSTION ENGINE Charles K. Woodman, Beverly, Mass. Application September 28, 1936, Serial No. 102,969 '7 Claims. (01.?60-97) L tributors. Similarconnections may extend from the distributors to other cylinders, not shown, and in these distributors the rotor M or “is driven in ?xed time relation by its respective engine. and spark plug or other ignition device. ' In one aspect it consists in a method of synchronizing internal combustion engines which consists in causing a circuit breaker of one engine to control the ignition of the other engine. In another as 5 ' ed in high tension circuit by wires l2 and 32 re spectively to the covers l3 and 33 of two dis The present invention relates to improvements in synchronizing internal combustion engines having the usual equipment of circuit breaker The distributor l3 has a connection I5 to the spark coil l6 of the port engine, and the distribu tor 33 has va connection 35 to the spark coil 36 of the starboard engine. The engines are fur pect it consists in a system including a switch or 10 other controlling device arranged in one position 10' ther provided with independent ignition switches to direct the ignition current from the breaker of one engine to its own spark plugs, and in another position for directing current from the breaker of one engine to the spark plugs of the other. While my invention has a broad ?eld of appli cation to any multiple installation of internal combustion engines, an important ?eld of use is in connection with motor boat installation where a pair of internal combustion engines are inde l1 and 31 and with individual breakers 23 and 43 which are'included in their respective primary or low tension circuits. In the installation shown the current is sup 15 plied by a single battery 26 having a ground con nection 21. The battery is connected to the port engine through its ignition switch ll by wires 28 and I8 and to the starboard engine through the 20 switch H by wires 28 and 38. The low tension 2 O pendently connected to twin propellers. For many reasons it is desirable to operate such en side of the spark coil I6 is connected through a wire I9 to one terminal 20 of a four-pole switch is easier to handle in these conditions, but because 41 having a movable member which includes two an unpleasant beat is developed when the engines . separate insulated segments 44 and 45 and a switch lever 48, the whole switch being arranged 25 are not synchronized. The present practice is within convenient range of the navigator. The to provide independent mechanism for control ling the speed of the two engines with an indica- . second terminal 2| of the switch is connected by tor for visually showing individual speeds. Such a wire 22 to the breaker 23 of the port engine. an installation requires almost constant vigilance The breaker is grounded by the connection 24 and 30 the cylinder ID by the connection 25 in high ten 30 on the part of the navigator and even when the gines in synchronism, not only because the boat 25: speed of the two engines is synchronized there is sion circuit. mal sailing conditions, as for example, when more load is thrown on one engine than the other in 35 changing the course of the boat. ' I have discovered that two engines may be is grounded by the connection 46 and the cylinder 30 is grounded by the connection 45 in high ten crossing the ignition circuits in such a manner sion circuit. 40 as to cause the breaker of one engine to control the time of ignition of the other engine. In practice the two engines may be independently brought up to substantially the same speed and then the cross-over connection e?ected. Run nin'g' under this system it will be apparent that if one'engine is caused to slow down on account of increased load or for any other reason, the igni tion timing in the other engine is retarded and the speed of the engine correspondingly reduced. These and other features of the invention will be best understood and appreciated from the fol lowing description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawing in which; ‘2, . LI The ?gure is a diagrammatic view of the sys tem as embodied in an installation comprising the two engines of a motor boat. , In the drawing a portion l0 and a portion 38 of the port and starboard engine cylinders are shown 60 36 is connected by a wire 39 to the third terminal 40 of the switch 41. The fourth terminal 4| of the switch is connected by a Wire 42 to the break er 43 of the starboard engine, and this in turn tions involving considerable variation in load by caused to run synchronously even under condi 50 ‘ Similarly the low tension side of the spark coil , a constant tendency toward variation under nor as equipped with spark plugs H and 3|, connect * In the position illustrated in the drawing the 40 switch member occupies a position in which the segment 44 connects the terminals 40 and 4| and the segment 45 connects the terminals 20 and 2|. The switches l1 and 31 are also shown in closed condition so that current from the battery 26 ?ows through the primary circuit of each spark coil and through the breaker for the respective engines. That is, the current flows from the bat- tery 26, through the connections 28, I8, the switch I‘! to the spark coil l6, of the port engine, then through the connection Hi to terminal 20, through the segment 45 to terminal 2|, through the con nection 22 to the breaker 23 of the port engine and through the connection 24 to the ground, that ‘is to say, to the engine frame. Accordingly, whenever the circuit is broken in the rotation oi.’ the breaker cam in the breaker 23 a high tension current is induced into the secondary circuit and a spark occurs in the spark plug II of the port engine. 60 2 2,108,422 Similarly current ?ows from the battery 26 through the connections 23, 38, switch 31, through the primary connection of the spark coil 36, to the connection 39, terminal 40, seg ment 44, terminal 4|, connection 42 to the breaker 43 of the starboard engine and through the con nection 46 to the ground. Accordingly when the primary circuit is broken in the rotation of the breaker cam of the breaker 43 a high tension 10 current is induced in the secondary circuit of the spark coil 36 and a spark occurs in the spark While I have described speci?cally a motor boat installation including a pair oi engines using gasoline fuel the invention may be advantageous ly applied to any multiple installation of internal combustion engines where synchronous operation is desirable, as in airplanes, for example. It may also be applied to other types of internal com bustion engines than those shown, such as rotary engines or engines of the Diesel type, all being within the scope of the invention. 10 Having thus described my invention what I plug 3| of the starboard engine. That is, both claim as new and desire to secure by Letters engines are operating independently, each Patent of the United States is, breaker controlling the ‘time of. ignition in the 1. The method of synchronizing a pair of in 15 engine with which it is associated. Under these ternal combustion engines, which consists in 15 1 conditions the two engines may be independently causing a circuit breaker of one engine to con brought up to the same speed by manipulating trol the ignition of the other engine. their respective throttles or in any other desired. 2. The method of synchronizing a pair of in manner. Having brought the two engines to ternal combustion engines, which consists in in 20 substantially the same speed, the navigator may dependently bringing the two engines up to ap now throw the switch lever 48, 90° to the left as proximately the same speed, and then so con shown in the drawing thus interrupting the cir necting the ignition circuits of the two engines cuit between the terminals 2|l--2| and 4ll—4| that a circuit breaker of. one controls the time and closing a circuit between the terminals of ignition in the other. 20' 20—4| and 2|-—40. ' In this shift the individual switches I‘! and 31 are left undisturbed. The cross-over connection thus established has the ' 3. The method of ‘synchronizing internal com bustion engines, which consists in independently bringing the engines up to approximately the effect of putting the breaker 23 of the port engine , same speed while the circuit breaker of each in control of the timing of the spark plug 3| of 30 the starboard engine, and of putting the breaker 43 of the starboard engine in control of the timing of the spark plug || oi.’ the port engine. The current from the battery 26 now ?ows through the connections 28, I8, switch I1, to the spark coil l6 of. the port engine, and then through the connection l9, terminal 2!], segment 44, terminal 4|, connection 42 to the breaker 43 of the starboard engine. Accordingly when the primary circuit of the spark coil I6 is interrupted 40 by the breaker 43 a spark occurs in the spark plug H of the port engine. Current also ?ows from the battery 26 through the connections 28, 38, switch 31, to the spark coil 35 of the starboard engine, and from there through the connection 45 39, terminal 40, segment 45, terminal 2|, con-' nection 22 to the breaker 23 of the port engine. Accordingly when in the rotation of the breaker cam of the breaker 23 the primary circuit is interrupted in the spark coil 36, a spark occurs 50 in the spark plug 3| of the starboard engine. I Running with the cross-over connections thus established, the two engines will be practically locked in step and will continue in synchronous " operation under all normal conditions of sail ing. For example, the boat may be made to swing as sharply as possible in either direction without disturbing the synchronous operation of the two engines. The navigator is thus relieved of the necessity of constant vigilance and atten~ 60 tion to the speed of the separate engine, and may handle the boat with no more complication than engine controls its own time of ignition, and then suddenly crossing the ignition circuits so that the circuit breaker of one controls the time of ignition of the other. ‘ 4. A system for synchronizing internal com bustion engines each equipped with a breaker and a spark plug, which comprises electrical con nections and a multiple pole switch arranged in one position for directing current to ?ow from the breaker of one engine to its own spark plug, and in another position for directing current to ?ow from the breaker of. one engine to the spark 40 plugs of the other engine. ; 5. A system. for synchronizing internal com~ bustion engines each equipped with a breaker, an ignition device and a spark coil, which comprises electrical connections and a multiple pole-switch arranged in one position to direct current from the breaker of one engine through its own coil and to its own ignition device, and in another position to direct current from the breaker of one :engine through the coil and to the ignition device 50 of the other engine. 6. A system for synchronizing internal engines each equipped with a breaker and an ignition de vice, which comprises a battery, electrical con nections and a multiple pole switch arranged in 55 one position to direct current from the battery to the breaker of each engine and to itsown, ignition device, and in another position to direct current from the battery to the breaker of each engine and to the ignition device of another en 60 gine. - is required by a single engine. 7. A system for synchronizing internal com It will be understood that the installation may bustion engines each equipped with a rotary tim include any type of commercial indicator for ing device and a plurality of spark plugs and showing the speed of the individual engines, but having electrical connections, and a switch device since these form no part of the present invention arranged in one position for directing the cur 65 they are not herein illustrated. As a‘matter of rent to flow from the rotary timing device of fact however, it requires little experience to use each engine to its own series of spark plugs, and the beat of the two engines as an indication of I in another position for directing current to ?ow 70 the proper time for throwing, the cross-over from the rotary timing device of each engine to 70 switch. This may be done at the peak of the the series of spark plugs of the other engine. beat thus obviating the necessity of getting the engines into perfect» synchronism by use of the individual throttles. . CHARLES K. WOODMAN.