LU81568A1 - IMPROVEMENT IN COOLING DEVICES FOR INTERNAL COMBUSTION ENGINES - Google Patents

Description

LU 1659

“Ϋ́ ^ —λ -GRAND-DUCHÉ DE LUXEMBOURG Patent N ° - ^ - J — Q — Q O

du _______ 2 .... aD.Ût .... l9..7.S .____________ ßj | jy | Ä Minister, öSaSj of the National Economy and the Middle Classes

Book title: _________________ w * gLjfgj Industrial Property Service

A 7 0¾¾ LUXEMBOURG

mvuL · · w L l <h Patent Application for Invention a I. Request îâ “SoEiëtë - Aaoayî3Ê ~ ditôï ---: U3ŒC“ S- “Av ~ & y" aTORue ”îîie ^ laB - Goperai-Q · ---------------------------- (1) 2IL18ÎUMEEES _______________________________________________________________________________________________________________________________________________________________________________ represented by Mr. Zewen, ing, - Industrial Property Attorney _ (2) 4. ^ ... pl.a.ceJ'Iins.ton.Oiu.r.ch, ill, .... Lux; .exRb.ourg., ..... agis £ ant .... en .. .quali.ti ..... äe .... iQjanä.at.ai.re .._________ deposits this ..deuK- aoüt'- i ^ ö & '-soiKante - nineteen ------- -------------------------------- ® à ............ 15 ™. · ·. Hours, at the Ministry of National Economy and the Middle Classes, in Luxembourg: 1. this request for obtaining a patent for invention concerning: "PerÊectionrieaen £ -.ÊUX" disBosifeiÆS "~ de .. - "re§r © i4isse2ieat" for - Œot-ettre --- a · ------------- (4> fiQj3 ^ ustion ... imtRrne'î .________________________________________ _______________________________________________________________________________________________________________________ declares, assuming responsibility for this declaration, that the inventor (s) is (are): * Bernard-MECTEfc ---------------------- ---------------------------------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- ---------- ® 73 ... baulevaxd ... Hen.ri. .Selliar .—---------------------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- 92 150 SURSSRES____________________________________________________________________________________________________________________________________________________________________________________________________

France------------------------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- ------------------ 2. the delegation of power, dated · 5ΓΗρρΒ · δ ------------------- --------------------- le —— 3. description in French •••• language -------------- ------------------------------ of the invention in two copies; 4 ........... J, _________________ drawing board ^, in two copies; 5. the receipt of the taxes paid to the Luxembourg Registration Office, ...... Geux-'août l9ô & 'Bôxxante âix-ïï6üi ----------------- ---------------------------------------------------------- -------------------------------------------- claims for the above request for patent priority of (a) request (s) of (6) --------------------. patent ----------- -------------------------------- filed in (7) ---------- ------- Erancô ------------------------------------------ ----------------------- le ------------------------- Bept August 'l% 0 BOixaute âix ^ bait' e'ôUS "l'Ê '' 'ü'iffiërô''78 23' '' 272 ------------------ ( 8) "'. In the name of - the plaintiff -------------------------------------- ---------------------------------------------------------- ---------------------------------------------------------- ; ----- (9i elects domicile for him / her and, if designated, for their proxy, in Luxembourg .----------------------- -----

Aj -plaee-WinstoEr-Ghurebill j-'LuxeiDbourg --------------------------------------- ------------------------------------------------ <10 > requests the issuance of a patent for the subject described and represented in the abovementioned appendices, - with adjournment of this grant to —g ------------------ ---------month. ^

Le _________. Man * atair.a ______________________________________ B ..t Π. Deposit Minutes

Your aforesaid patent application has been filed with the Ministry of National Economy and Middle Classes, Industrial Property Service in Luxembourg, dated: August 2, 1979 on _ Pr. Minister 4 at _________ hours // ^ ^ V ^ "0011011 ^ 6 Natîo ^ i and, of the Middle Classes, i— T ~> iJ S. 1 \ /

Faith F ψ gâi A 68007 \\ -..... / / 03 / PM / JGH H 9731 case 91 LU 1659 &

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DESCRIPTIVE MEMORY * submitted in support of a request for

PATENT

· <On behalf of the so-called company: UNIC S.A. for: "Improvement of cooling devices for internal combustion engines." •THIS. Priority of French patent application No 7823272, filed on August 7, 1978 in the name of the applicant.

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Patent

Improvement of cooling devices for internal combustion engines.

^ Société Anonyme known as; * UNIC S.A.

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ABSTRACT DESCRIPTION

Improvement of cooling devices for internal combustion engine, comprising a radiator which is connected respectively to the engine cooling chamber and to a. circulation pump itself connected to a coolant expansion tank, in which an air pressure above atmospheric pressure is maintained.

The expansion vessel 8 is connected to an air pump 10 generating a pulsed air pressure, said pump 10 being driven by an auxiliary member of the internal combustion engine 1.

The invention is used for cooling internal combustion engines.

(figure 1).

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The present invention relates to an improvement to cooling devices for internal combustion engines.

In cooling devices for internal combustion engines, in particular for diesel engines, it is * well known to keep the liquid cooling circuit under pressure / in order to avoid the risk of vapor formation. at specific locations in particular in the engine cooling water box and to avoid cavitation phenomena which, in common with chemical influences, lead to corrosion of specific parts of the cooling chambers.

Devices are also known in which pressurization is obtained by connecting the expansion tank directly to the general circuit of compressed air supplying the various organs of the vehicle.

. However, these devices are not entirely satisfactory since it is desirable to isolate the engine cooling circuit from the general compressed air supply circuit 20.

According to the present invention, the expansion tank is connected to an air pump generating a forced air pressure, said pump being driven by an auxiliary member of the internal combustion engine.

According to a characteristic of the invention, the positive device for pressurizing the circuit is actuated by a pressure variation of one of the auxiliary organs of the engine and in particular the pressure pulse at the intake of the compressor of> brake air; the 'conditioning of such a device? 30 is very fast and above all is not dependent on the rise in the temperature of the water causing its expansion and therefore the establishment of the pressure

The sealing defects of the filling plugs with a calibrated valve are less consequent, because the device is always able to establish the pressure and compensate for leaks.

- ’Other characteristics and advantages of the invention will be better understood on reading the description which will follow of an embodiment and with reference to the des- V - -. - t! * -. ". · -2-.

attached sins, in which: - Figure 1 is a schematic view of the cooling circuit of an improved internal combustion engine according to the invention 11 - 5 - Figure 2 is a sectional view of an embodiment of the pump air diaphragm.

In FIG. 1, an internal combustion engine 1 has been represented, the coolant circuit of which comprises, at the outlet of the engine cooling jacket, a manifold 2 which is connected by a conduit 3 , at the upper part of a radiator 4, .through a thermostatic valve 5 capable of short-circuiting the passage to the radiator and of directly connecting the conduit 3 to a circulation pump 6 which is connected to the inlet port of the engine cooling jacket 1.

At its lower part, the radiator 4 is also connected to the inlet of the pump 6 by a conduit 7; just as an expansion tank or coolant feeder 8 is connected by a conduit 9 to the suction of the pump 6.

To ensure overpressure in the expansion tank 8 in the space located above the coolant, said tank is connected to the discharge orifice 12 of an air pump 10 by a conduit 11, said pump being connected to the atmosphere by a suction port 13.

On the conduit 11, between the discharge of the air pump 10 and the expansion tank -8, is arranged a non-return valve 14 preventing possible return of water in the air pump. The air pump 10 shown in more detail in Figure 2, 30 consists of a body divided into two chambers 15 and 16 by a flexible membrane 17 whose balance is obtained by its own rigidity and by the action of a spring 18 bearing on the bottom of the chamber 16.

The chamber 15 is connected to the atmosphere by the ori-35 fice 13, the opening of which is controlled by a suction valve 18 and to the expansion vessel 8 by the orifice 12, the opening of which; ture est.contrôlëe by a discharge valve 19.

The other chamber 16, called the driving chamber, is connected by an orifice 20 and a conduit 21 to an air intake pipe - 3 - for air supply 22: generally compressed air. The suction pipe 22 of the coicressor was itself connected to an air intake manifold 24 of the engine supplied from a duct 25 connected to the atmosphere via an air filter. 26.

The pressure lines generated in the suction pipe 22 ci. compressor 23 are transmitted by the con-

Iduit 21 inside the chamber 16 of the pump 10 thus causing an alternating displacement of the diaphragm, 17 against 10 of the spring 18. The displacement of the diaphragm 17 causes a variation in volume of 1b chamber 15 d air, which results in a change in pressure - predetermining a displacement of the valves 18 and 19, so that the atmospheric air sucked by the tubulu-re 13 is discharged through the tubing 12 to the expansion tank 8 115 through the conduit 11 and through the check valve 14. The calibration of the spring 18 makes it possible to obtain a predetermined level of pressurization.

Alternatively, it would be possible to control the membrane 17 by mechanical means connected to a drive member of the internal combustion engine.

Of course, various modifications can be made by those skilled in the art to the devices or methods which have just been described solely by way of non-limiting example, without departing from the scope of the invention.

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Claims (5)

1. Improvement of cooling devices for internal combustion engine, comprising a radiator which is connected respectively to the engine cooling chamber and to a circulation pump itself connected to a coolant expansion tank, in which is maintained an air pressure higher than atmospheric pressure, i characterized in that the expansion tank is connected to an air pump generating a pulsed air pressure, said pump being driven by an auxiliary member of the engine to internal combustion. 10 , 2) Improvement to the cooling devices according to claim 1, characterized in that the air pump l consists of a body separated by a membrane into two chambers, one of which is connected to the suction of a compressor of air supplying the general compressed air circuit of the vehicle 15 ′ and the other of which has suction and discharge orifices provided with valves which are connected respectively to the atmosphere and to the expansion tank. 3. Improvement to the cooling devices according to claim 2, characterized in that the membra-20 is not subjected on one of its faces to the action of an elastic member disposed in the motor chamber connected to the intake of the compressor, said elastic member being calibrated to have a predetermined level of pressurization. . 4) Improvement according to claims 1 and '25 2, characterized in that a non-return valve is disposed on the, conduit connecting the discharge of the air pump and the expansion tank. 5. Improvement to the cooling devices according to claims 1 and 2, characterized in that the control of the membrane is ensured by mechanical means connected to a drive member of the internal combustion engine. \