FR2831209A1 - Coolant circuit control for motor vehicle internal combustion engine has variable feed pump and flow control cylinder controlled via temperature sensors - Google Patents

Abstract

The coolant circuit control is for a motor vehicle internal combustion engine (6) with a variable feed pump driven by an electric motor (2) and a second motor (3) to actuate a flow control cylinder valve. Sensors (15,16) in the coolant circuit are connected to a control to provide a stable temperature. The control circuit also controls the radiator (9) ventilation. The control circuit maintains the signals until the coolant reaches ambient temperature.

Description

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INVENTION
The present invention relates to a device for optimizing the cooling of liquid-cooled thermal engines whatever the fuel or the power of the engine.

 The object of the patent is to substitute for the conventional pump (generally a centrifugal turbine pump) a variable-rate pump, whether it is piston or paddle and eccentric and no longer driven by its motor in motion but, by a electric motor 12 or 24 volts at two or three speeds and therefore not dependent on the operation or not of the engine. It will be the same for the servo electric motor varying the flow rate of the variable flow pump and which will receive its operating current by a control unit in the form of an electronic calculator module for the purpose of receiving, from analyze and compare the different parameters that will be provided by temperature probes, placed at the strategic points of the cooling circuit; it will also commission the commissioning of the electric fan or fans charged with the ventilation of the radiator-air-cooler exchanger of the engine to be cooled. This centralized control unit will have to trigger and control the variable-rate pump, its drive motor, and its servo motor, as well as its bypasses for regulating the maximum pressure of the liquid, in this case that of the pressurized circuit, will be realized in the form of a single-block assembly, the computer constituting an independent assembly and the whole powered by battery permanently, either in 12 or 24 V. The launching of the engine controlling only the commissioning of the device, but not its stop, this being the mainspring of the computer, in order to equalize the temperatures after a stopping of the engine as soon as after a violent force under full load, and if possible to avoid the accidental rise of the temperatures in certain delicate points, like the block engine and its cylinder head (s). The goal is to fully manage the action and efficiency of the cooling circuit by taking into account all the parameters and by acting on the flow of the fluid in the cooling circuit by the use of a flow water pump variable to act on the flow of liquid in real time and remaining in the imposed pattern in

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 particularly the pressurization of the circuit and the maximum pressure, in order to protect the components that do not support the overpressures, such as the hoses and the radiator-liquid-air heat exchangers.

 The lubrication of the variable flow pump will be provided by a suitable additive mixed in the coolant. The cylinder head exit thermostat remains in place and performs its function.

 A synoptic diagram of a principle installation is attached to this invention.

 This invention is intended to apply to all cooled, liquid-cooled engines, whether they are adapted to motor vehicles, fixed in industry, adapted to the marine, or They equip public works machinery, or agricultural equipment, heavy goods vehicles, wherever the motive power requires a heat engine whatever its fuel and power.

refroidissement des moteurs thermiques à jaquette liquide, la 1 première en faisant appel au débit variable du fluide transporteur de la chaleur afin de l'écouler au plus vite, vers l'échangeur de température en l'occurrence un radiateur, et ce sans recourir à l'énergie venant directement du moteur à refroidir, mais en jouant quantitativement sur les joules à transporter vers le refroidisseur. La deuxième notion fait appel à l'emploi d'un module-calculateur électronique, centralisant les différents paramètres qui lui sont fournis par les sondes et les témoins de marche et de mesures disposés à cet effet sur le moteur, et pilotant d'une part le débit et pilotant également le fonctionnement du ventilateur électrique en fonction de la température d'ambiance dans laquelle fonctionne le moteur à refroidir. The proposed device which is the subject of this invention provides two new ways of treating the

cooling the thermal engines with liquid jackets, the first 1 by using the variable flow of the heat transfer fluid in order to flow as quickly as possible, to the heat exchanger in this case a radiator, and without resorting to the energy coming directly from the engine to cool, but playing quantitatively on the joules to transport to the cooler. The second concept uses the use of an electronic computer module, centralizing the various parameters that are provided by the probes and the walk indicators and measures arranged for this purpose on the engine, and driving on the one hand the flow and also controlling the operation of the electric fan according to the ambient temperature in which the engine to be cooled.

 The aim would be to obtain a heat curve of the engine quickly reaching its generally fixed peak at plus or minus 92 to 94 centigrade and then maintain this flat curve, whatever the engine load conditions, and taking into account the pressurization of the cooling circuit installed on the engine. It also has the advantage of continuing to operate after stopping the engine at full load since the energy of

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 Operation is provided by a 12 or 24 volt battery.

The device stops only when the computer gives the signal. This feature avoids hot spots detrimental to the potential resistance of the engine over time. By maintaining an ideal temperature to the good performance of the engine which will eventually be equipped with the device, the subject of this patent, we can only reduce its operating and maintenance costs, especially in extreme climates and in conditions of severe job.

 The notion of variable flow is known since 1906, JANNEY pump and 1912 pump HEHE SHAW. But its use in the circulation of coolants, its automatic and centralized control have to my knowledge to date never been associated with a global electronic management system, the cooling function of thermal engines in situ.

 All the components involved in producing the device that is the subject of this patent exist in various forms. Here they are gathered to be associated with the aim of optimizing the modern notion of the cooling treatment of thermal engines as closely as possible by controlling the managed notion of the cooling fluid flow differently than in an anarchic way.

 One of the main features of the device (described in this invention) is the presence of an electric pump unit designed to receive a cooling fluid and consisting of a speed electric motor that drives a variable displacement volumetric pump, the flow rate being controlled by a servo motor, controlling the variation of displacement, and provided with a bi-pass, regulating the pressure of the fluid and avoiding accidental overpressure. This set receives its operating signals from a computer box, itself connected to a network of sensors arranged accordingly, on the cooling circuit. This pump unit is easier to house.

 This complete device is all the more necessary as the engine is powerful and changes in speed and load are common.

 With the use of this device, the engine runs at the optimum temperature desired to obtain its best performance hence fuel economy! because not only

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 circulation of the coolant is controlled but the flow of cooling air is also managed by the computer-box. All parameters are taken into account by this device.

 There are electro-pump units electrified but less evolved, they remain based on a centrifugal pump.

 Here is a diagram showing the whole device.

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20 <SEP> 1 <SEP> Fan <SEP> Electrical <SEP> 2 <SEP> Speed
<tb> 19 <SEP> 1 <SEP> Power Supply <SEP> 12 / 24V
<tb> 18 <SEP> 1 <SEP> Various <SEP> Connections
<tb> 17 <SEP> 1 <SEP><SEP> module of <SEP> electronic <SEP> control
<tb> 16 <SEP> 1 <SEP><SEP> probe of <SEP> temperature <SEP> high
<tb> 15 <SEP> 1 <SEP><SEP> probe of <SEP> temperature <SEP> low
<tb> 14 <SEP> 1 <SEP><SEP> Regulator of <SEP> Pressure
<tb> 13 <SEP> 2 <SEP> Outputs <SEP> High <SEP> and <SEP> Low <SEP> of <SEP> Expl. <SEP> Heating.
<tb> servitude
<tb> 12 <SEP> 1 <SEP> Port <SEP> of <SEP> too much <SEP> full
<tb> 11 <SEP> 1 <SEP> Plug <SEP> with <SEP> valve <SEP> of
<tb> pressurization
<tb> 10 <SEP> 1 <SEP> Thermostat
<tb> 9 <SEP> 1 <SEP> Radiator <SEP> exchanger
<tb> 8 <SEP> 1 <SEP> Electrical <SEP> Fan
<tb> 7 <SEP> 1 <SEP><SEP> cover of <SEP> liquid <SEP> of
<tb> cooling
<tb> 6 <SEP> 1 <SEP> Thermal <SEP> Engine
<tb> 5 <SEP> 1 <SEP><SEP><SEP> Lever <SEP>SEP> Debit Command
<tb> 4 <SEP> 1 <SEP> Pump <SEP> to <SEP> flow <SEP> variable
<tb> 3 <SEP> 1 <SEP> Engine <SEP> elect. <SEP> of enslavement
<tb> 2 <SEP> 1 <SEP> Engine <SEP> Electrical <SEP> 3 <SEP> vits <SEP> 12 / 24V
<tb> 1 <SEP> 1 <SEP> Battery
<tb> REP. <SEP> Nb <SEP> DESIGNATION <SEP> MA <SEP> TIERE <SEP> 085.
<Tb>
NOMENCLATURE OF THE SINOPTIC SCHEME

Claims (2)

1) Apparatus for cooling internal combustion or combustion engines, provided that it uses a cooling liquid and the cylinder block is surrounded by a jacket of liquid, characterized in that the flow rate and the speed of circulation of the cooling fluid are variable by the use of a variable flow pump, instead of the centrifugal pump, or other, which is driven by a DC motor, low voltage 12 or 24 volts, equipped with three electric speeds and whose operation is independent of the operation of the engine to be cooled.  2) Device according to claim 1, characterized in that the variable flow pump is controlled in real time by an independent electronic computer module continuously supplied by a common storage battery to the variable flow pump and which receives signals from temperature probes arranged for this purpose and various operating indicators, the device also controlling the commissioning of the fan or fans charged with cooling, the liquid-air heat exchanger radiator or radiators installed on the circuit and whose rotation speed will be also variable electrically and driven as required, the computer module constantly comparing the received data with the installed standard and reacting accordingly, the device controlling the variable flow pump, via a servo reduction motor, also powered by the battery 12 or 24 VDC and acting on the regulator flow rate of the variable flow pump, the computer module triggering the shutdown of the cooling device regardless of the engine stop to cool, but only data collected by the temperature sensors installed on the circuit to better Protect the engine from hot spots, after a sudden stop at full load, the engine thermostat remaining in place and filling its office until the temperature reaches 92 to 94 degrees centigrade, the pressurization of the circuit also remaining in place.