DE2333088A1 - Damper grille for vehicle radiator - has temperature control louvre operated by electric motor - Google Patents

Abstract

The cooling water temperature is controlled by adjustments of a damper louvre on the front of the radiator which reduces the air flow and thus the cooling effect. The louvre consists of parallel blades linked to a moving bar which opens and shuts all blades together. The bar is moved by a linkage from an electric motor mounted at one end of the louvre. The motor car can be activated in either direction either by a switch on the dashboard or by a thermostat in the cooling water piping.

Description

R. 1 5 23

7.6.1975 Kü / Ma

Attachment to

Patent registration with

Utility model auxiliary registration

ROBERT BOSCH GMBH, Stuttgart

Device for adjusting the temperature of the cooling liquid speed of motor vehicle engines

The invention relates to a device for adjusting the temperature of the coolant of motor vehicle engines with one cooler through which the coolant flows and one the air throughput through the Adjustable cover influencing the cooler.

Such covers, which are usually designed in the form of adjustable flaps, are intended to prevent cold airflow to prevent the radiator and the motor vehicle,

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if the latter has not yet reached its operating temperature. You want a faster one that way Achieve warming of the engine and thus reduce cylinder wear and fuel consumption.

In known devices of this type, the cover is removed from the driver's seat of the motor vehicle via a Bowden cable adjusted off. Improved designs have a thermostatic control, whereby the temperature change the coolant is used to adjust the cover. The previously known systems of this type have a temperature-dependent function in the coolant channel Actuator whose adjustment movement is transmitted directly to the cover via rods or cables will.

All of these known devices are not very easy to assemble because it is very difficult to assemble the rod parts or to cleverly accommodate sex balls in the engine compartment. In particular Retrofitting vehicles with these devices is hardly an option because of the excessive effort involved.

The object of the invention is therefore to create a device of the type mentioned at the outset which is more simply constructed and can be produced more cheaply and which is particularly suitable for subsequent installation.

According to the invention, this object is achieved in that an electric motor is used to adjust the cover.

It can be used to replace the rod parts or cables with electrical cables that are used in every power

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vehicle can also be easily relocated at a later date.

A permanently excited motor is preferably used, which is approximately the same as that of electrically excited motors Performance has the advantage of a smaller size.

According to an advantageous further development of the invention

the cover is pivotable in a manner known per se by several, interconnected via a push rod Flaps formed and the push rod hinged to a crank operated by the electric motor. The cover and the Motor are attached to a common support frame, so that the device as a compact unit can also be retrofitted can easily be installed between the smoke deflectors in front of the radiator of the motor vehicle.

The invention is explained in more detail below with reference to an embodiment shown in the drawing. The internal combustion engine of the motor vehicle is denoted by 10, in front of which a fan 11 and a cooler 12 are arranged in a known manner. The internal combustion engine 10 is water-cooled, the cooling liquid heated in the engine being fed to the radiator 12 via the line 1J5 and, after cooling, flowing back into the engine via the line 1h.

The cooler 12 is arranged between the air baffles 15 and v; is cooled by the airstream - symbolically represented by the arrows. Forward in the direction of travel the cooler is between the air baffles 15, the overall designated 20 cover is arranged. These

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Cover has a support frame 21 on which several flaps 22 are pivotably articulated. The flaps 22 are articulated to a push rod 23 which is attached to a crank 24 is hinged. This crank 24 is possibly with the interposition of a transmission gear of a Electric motor 25 driven, which is attached to the support frame 21 is attached. The entire cover, consisting of the support frame, adjustable flaps, push rod and electric motor thus form a compact structural unit that can easily be retrofitted to a motor vehicle can.

The adjustable flaps 22 are designed in such a way that they partially lie on top of each other in the position shown in dashed lines, thus completely shielding the cooler; for the sake of clarity, only some of the flaps are shown in dashed lines in the drawing, while two flaps are shown in the other position.
The device shown in the drawing is now only to be supplemented by an electrical line to the dashboard, via which the electric motor can be switched on in one or the other direction of rotation. However, the device can also be developed in a simple manner in such a way that the air throughput through the cooler is automatically regulated as a function of the temperature of the cooling liquid. This requires a temperature-sensitive measuring element in the coolant line IJ and an electronic switching device via which the motor is switched on in one or the other direction of rotation. The electric motor will preferably be switched off via an overcurrent switch. Such a circuit arrangement is described, for example, in German Offenlegungsschrift No. 2 247 I67. The device works in the way that the flaps are moved into the end position in which the cooler is penetrated by the airstream.

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flows as soon as the temperature of the coolant has risen to the setpoint. Below the target value, the cover is closed so that there is no airflow can reach the radiator or the internal combustion engine. This means that the motor heats up more quickly.

A thermostat is usually built into the coolant circuit to control the flow of the coolant to the cooler blocks as long as the temperature of the coolant is below the setpoint. The regulation is then preferably designed in such a way that the cover is already opened when there is still no cooling liquid can get to the cooler. This ensures that the cover is definitely open as soon as the Coolant can reach the radiator.

The device according to the invention is characterized by a particularly compact structure and can also be retrofitted easy to mount in any vehicle, because the electrical lines for switching the electric motor can easily be retrofitted in the engine compartment even by laypeople to be installed. The switching device for controlling the motor claims when using the usual today Semiconductor components also take up very little space.

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Claims (6)

Expectations Device for adjusting the temperature of the cooling liquid of motor vehicle engines with a cooler through which the coolant flows and a influencing the air flow through the cooler., adjustable cover, characterized in that an electric motor is used to adjust the cover (20) (25) is used. 2. Device according to claim 1, characterized in that that the electric motor (25) is a permanently excited motor. J ». Device according to claim 1 or 2, characterized in that the cover (20) is formed in a manner known per se by several pivotable flaps (22) connected to one another via a push rod (2j5) and the push rod (2j5) on one of the Electric motor (25) operated crank (24) is articulated. 4. Apparatus according to claim J>, characterized in that the cover (20) and the electric motor (25) are attached to a support frame (21). 5. Device according to claim 4, characterized in that that the support frame {21) between the air baffles (15) is arranged in front of the radiator (12) in the direction of travel. 6. Device according to the preceding claims, characterized in that the position of the cover and thus the air throughput through the cooler (1-2) is automatically adjustable depending on the temperature of the coolant is. AO9883 / 0197