Патент USA US2407078код для вставки
- Sept. 3, 1946. 2,407,078 G. M. HOL-LEY, JÉ POWER CONTROL Filed March :5, A1944 RN Qm 4120249@ Mßïolley cÍÍ: INVENT0R. BY Patented Sept. 3, 1946 2,407,078 UNITED STATES PATENT oiFgFicE VPOWER CONTROL George M. Holley, Jr., Grosse Pointe, Mich., as -sigßnor to :George M. Holley and Earl `'Holley Application’March '3, 1944, Serial No. 524,977 i ’9 Claims. (Cl. 123-103) 1 ` 2 . The object of this invention is to regulate ‘the throttle of a supercharged airplane engine Ain which the throttle is located inthe air entrance leading to the supercharger. The speciñc object is Ato regulate "the‘super charger pressure 'so that when lthe supercharger pressure exceeds the‘pressure ofthe atmosphere by a certain number of pounds per square inch, A and B are two :servo motors of well known types. The lever 3 z,engages witha button _9 which - in- its turn .engages with a compression spring I0 which engages with a ñange of the rod I4. `Rod Cl I4 is connected to the diaphragm .II which forms the right hand wall `of „a chamber `I2 which is connected through .pipe I8 with‘an inlet manifold I9 on the engineside of a supercharger 20 which is connected to the air entrance `2| in which is located the throttle 5. The rod I4 is so .con structed and arranged »as .to act as v.aservo motor valve for operating Athe piston ,I3 which, when the rod I4 moves vto .the left, >also moves to >the the air inlet throttle is closed so vas to prevent the supercharger pressure from exceeding the number of pounds ‘per ‘square >inch a‘bove the atmosphericpressure selected bythe pilot. The regulation of an engine by automatically controlling the number `of pounds per square inch left, compressing the »compression spring .2.2. increase of the pressure ofthe ysupercharger and 15 Oil pressure is admitted through pipe IT .and also the Àmanual selection of the amount of this escapes through passage 23. When .the rod I4 is increase is old. One example of this is the AFrench moved to »the left, the ports ,in the rod I4 deliver Patent No. 398,637 to Bihan et al., dated March the oil pressure into the chamber 24.0!'1 the right 29, 1909. The defect of ‘Bihan was that `when hand side of .thepiston I3 and the throttle 5 >con the plane ascended ‘into'the air, there was a loss of power due to -the ‘fall in the density fof the air. Hence, itis necessary, `if Ysuch >a "loss'is to be avoided, to obtain `an increasing ~difference tinues toropen `until ,the supercharger `pressure _in the inlet mani-fold `I9 vand in chamber I2 increases >.until the diaphragm .I.I moves to the right restoring the valve rod I4 to its neutral between lthe atmospheric pressureand the ‘pres position. XOilis allowed Lto .escape `from the left sure generated by the supercharger `with .alti 25 ‘hand sideof piston I3, `that is, from chamber 25 tude. This lpressure is `commonlt7 known `as through passage ,2.6. past port in rod IA to the oil “gauge pressure.” 1f >the attempt-is‘made to give outlet 23 when the valve rod .IA iS -`left 0f .the neutral position shown. Before the engine begins fto operate, there is crease in the exhaust backpressure >the netresult 3.0 no oil pressure ,and _elements I5 vand I6 are pro a constant -absolute pressure on the engine side of the supercharger, then because ofthe _de is that there is Van increase of power with altitude vided. Elements I5 and I6 are .spring loaded and at the rate of 1.2% per 1,000 feet, approximately. move .dOWl‘l ,and engage with the rod 14. The rod The greatest power, however, is needed >when I4 is connected directly to the piston I3 so that getting koff the ground at sea `’level and, there when this happens -there is a `rigid connection fore, this is ‘the opposite of what is "desired, 35 from rod I4 to the _rod 4 ,so that 'the throttle 5 I, therefore, propose to vary this increase in can be manually `opened to „start the engine. manifold air pressure with altitude `so as to 'give When the Loil _pressure ís .,admítte‘d, `_the elements the maximum supercharger pressure when ‘tak I5 and I6 are pressed upward, compressing the ing off at sea level. spring contained „inside ,elements I5 and 16. > The figure shows the preferred form of my in 4.0 When this happens, the `rod 'I 4 is ,free and, there fore, _the piston I3 responds to the _oil pressure, or `rather the .dinerence .between the oil .pressure is a link connecting it with a lever 3 which -is in pipe ,I‘I andthe .Oil pressure in rpipe „23. The connected through suitable Voperating means -in result is that the piston responds to the .mote cluding the mechanismV enclosed in casing AA `to 4.5 `ment of rod ‘I4 whereas the rod I4 `vcould exert a rod 4 which is connected to a :throttle Bar „only a relativelysmall .pressure on piston I3,.but ometric element 6, connected through vsuitable a large >pressure is now 4exerted»and so the .throttle operating `means including the device B- to a c_am 5 opens until the pressure iin `the pipe IB 'is large 'I,V controls the fulcru-m 8 so that the position .enough to generate .sllllicient _snpercharger `pres~ of the fulcrum 8 varies with altitude. Manual sure in `chamber .I2 -toloppose the ,compression .of the spring I0 when the diaphragm II and the control modilied by altitude is thus available. The roller 8 is mounted on »a connecting rod 35 rod I4 move into their neutral positions and the which slides in the stationary .element 3.1 «and throttle v5 =.ceases ~to open. -The liquid ‘-.entering »at which connects the roller 4llw-ith .a pin 36. Pin I.'I Aîlowfs through a ¿port 4.3, which engages withA Vention. In the figure, Ivis the `pilot’fs hand control. '2 36 is the fulcrum for the lever 3. . 55 efgrßvveMI-inzthe rod M, ,Whenfrod |¿4 is moved _ . n , 4 3 to the left, the oil under pressure is thus admit ted to chamber 24 from the port 44 through a chamber, a moving Wall associated therewith, a passage connecting said chamber with the engine ports 45, 46 and 41. side of said supercharger, spring loading means engaging with said moving wall in opposition to When the rod I4 is moved to the right, oil un der pressure in groove 44 flows into chamber 25 the supercharger pressure, the pressure on the other side of said wall being atmospheric, man along ports 48, 49 and 26. Meanwhile, the liquid from the opposite side of piston I3 escapes to the ually controlled means for controlling said spring outlet 23 as follows: when piston I3 is moved to the left by oil pressure in 24 as a result of mov loading means, barometric responsive means for modifying said spring load on said moving wall at all positions of said manual means, a connec 10 ing rod I4 to the left, then port 48 is put in com munication with a groove 52 in rod I4, which is in communication with a port 53, which is con tion from said moving wall to said throttle lever whereby the position of the throttle is controlled by the movement of said moving wall in response nected with the outlet port 23. to changes in the pressure of the supercharger When piston I3 is moved to the right by oilV pressure in 25 as a result of moving rod I4 to the and this supercharger pressure is balanced by 15 right, a groove 50 in rod I4 is put in communica said spring loading means which is regulated tion with the port 45 and so through the port jointly by the manual control means and by said 5I with the outlet port 23. ‘ barometric means. The casings A and B, as well as the housing 54 containing the chamber I2, are all stationary. Altitude control The roller 8, which acts as the pivot for lever 3, is held in engagement with the cam 1 by the spring 21. The expansion of the barometric ele ment 6 moves valve rod 28 to the right which permits oil pressure to escape from the right hand side of piston 29 to pipe 3|. Oil pressure is then admitted through a pipe 30 to the left hand side of piston 29. IThe piston 29 then rotates the cam 1 clockwise. The piston 29 is pushed to the left by the compression spring 39 and pushes the yoke 38 to the right and thus pushes the rod 49, which engages with a slot 42 in the lever‘1, which has a fulcrum 4I in the stationary .element 31. A groove 55 in piston 29 is in communication with the low pressure pipe 3|. When valve 28 moves to the left, the pressure in chamber 55 to the left of piston 29 falls to the pressure in pipe 3l 20 25 Z. A device as set forth in claim l in which a servo motor is interposed between said movable wall and said throttle. 3. A device as set forth in claim 1 in which a servo motor is interposed between said baro metric means and said spring loading means. 4. A device as set forth in claim l in which a servo motor is incorporated in said connection from said moving wall to said throttle a'nd in which a servo motor is incorporated between said barometric responsive means and said spring loading means. 30 5. A throttle control for a supercharged air craft engine comprising an air entrance to said engine, a throttle valve therein, a lever therefor, an air chamber, a moving wall associated with 35 said chamber, operative «means connecting said wall with said throttle lever, a passage connect ing said chamber with the engine side of said supercharger, spring means engaging with said wall, the pressure on the other side of said wall due to the restriction 51. yj58 is a corresponding being atmospheric, a control lever engaged with 40. restriction between the high pressure line- 39 and said spring means, manually controlled means for the chamber 59 to the right of thepiston 29. moving said lever, barometric responsive means When starting the engine, before oil pressure for varying the fulcrum of said control lever becomes available, the spring loaded element 32 whereby the spring load on said movable wall is locks the cam 1 in place so that until oil pres regulated jointly by the manual control means sure is obtainable, the fulcrum 8 is held in a ' and by said barometric control means and the fixed position. Oil pressure admitted from pipe throttle lever is opened and closed until the 30 unseats the locking device 32. supercharger pressure balances said spring load. 6. A throttle control for a supercharged air Operation craft engine comprising an air entrance, a throttle 50 Whenever the throttle valve 5is in equilibrium, valve therein, a lever therefor, a servo motor hav that is to say, when the pressure in the inlet ing a piston connected to said lever so constructed manifold I9 is high enough to balance the com and arranged as to open and close said throttle, pression of the spring _I0 determined by the an air chamber, a moving wall associated there position of the manual control lever I and the with, a passage connecting the air chamber with altitude cam 1, the diaphragm II is in the posi 55 the engine side of said supercharger, a valve tion shown in the drawing. Hence, the spring controlling said servo motor, said valve being con I0 is compressed against the flange of the rod I4 nected to said moving wall, spring loading means which assumes a fixed position whenever the associated with said moving wall, the pressure on _ throttle 5 is in equilibrium. Hence, the position of the other side of said wall being atmospheric, the lever 3 determines the position of the throttle 60 a control lever engaging with said spring load 5 and the position of the lever 3 is determined ing means, a barometric responsive device, a jointly by the position of the manual control lever servo motor associated therewith and connected I and the position of the altitude cam 1 which to the fulcrum of said control lever, manual automatically increases the Vgauge pressure with means for moving said lever whereby the spring 65 altitude. More specifically, the position of the loading means is controlled both manually and lever 3 determines the differential pressure be automatically. tween the manifold air pressure and the atmos 7. A device as set forth in claim 6 in which the pheric pressure and this pressure differential is servo motors are so constructed and arranged modified by the lever I manually and by the bar ometric capsule 6 automatically through` the 70 that in the absence of oil pressure to operate said servo motors, the ñrst servo motor is oper cam 1. What I claim is: - V1. A throttle control for a supercharged air ated mechanically by said moving wall and the moving wall is positively moved by said control craft engine comprising an’air entrance to said lever and the second servo motor is inoperative I « l. ' engine, a throttle valve therein, a lever therefor, 75 ‘ to move said fulcrum. 2,407,078 6 . 8. Throttle control for supercharged aircraft 9. Yieldable throttle control means for super» charged aircraft engines comprising, a manually .engines comprising, yielding means, throttle con trol means responsive to said yielding means and operated lever, yielding means associated there to the amount of supercharger pressure- rela with, throttle control means responsive to the tive to the atmospheric pressure, said super Ul said yielding means and to the amount of super charger pressure being arranged so as to act charger pressure relative to the atmospheric pressure, said yielding means being adapted to in opposition to said yielding means, an induc oppose said supercharger pressure, an induc~ tion throttle valve for said engine connected to tion throttle valve for said engine connected to said throttle control means, so that an increase in supercharger pressure closes the throttle valve, 10 said control means, so that an increase in the means responsive to changes in the atmospheric yielding means opens the throttle, and an increase pressure, so constructed and arranged as to vary in the supercharger pressure closes the throttle, means responsive to changes in the atmospheric the said yielding means directly, and thus indi rectly the supercharger pressure opposed thereto, pressure, so constructed and arranged as to vary so as to vary the position of said throttle Valve with altitude, manual means so constructed and said yielding means and the said supercharger arranged as to cooperate With said atmospheric pressure responsive means in the control of said yielding means directly and thus indirectly ci said supercharger pressure so that at any given . pressure, so as to vary the position of said `throttle valve With altitude at every position of said man~ ual control means, manual control means so constructed and arranged as to cooperate 'with said atmospheric pressure responsive means in altitude the throttle is closed by said supercharger the control of said yielding means and of said ' pressure as said pressure »rises above that of said yielding means selected by said manual `control supercharger pressure. means to oppose said supercharger pressure. ' GEORGE M. HOLLEY, JR.