DE3238919A1 - METHOD FOR OPERATING A LIQUID-COOLED INTERNAL COMBUSTION ENGINE, AND A DEVICE FOR IMPLEMENTING THE METHOD - Google Patents

Description

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The invention relates to a method for operating a liquid-cooled internal combustion engine, the cylinder block of which is equipped with channels for the circulation of the cooling liquid, which is transported through an air-cooled heat exchanger.

With a cold start of such a machine, during the Warm-up time, their wear and tear and fuel consumption increase.

It is therefore the object of the invention to remedy the aforementioned disadvantages. The object is achieved in that as soon as the engine is switched off, the heated coolant is directed into an insulated storage container. Before another When the engine is started, this heated liquid is directed from the storage tank back into the channels of the cylinder block.

This process ensures that, as long as the coolant in the storage tank is warm, the cylinder block in front of the Start is warmed up and thus the disadvantages resulting from a cold start are reduced.

The invention also relates to a device relating to the Cylinder block of a liquid-cooled internal combustion engine, which is equipped with channels for the circulation of the cooling liquid. According to the invention, this device has a insulated reservoir and a pump with which the cooling liquid is pumped from the channels of the cylinder block to the reservoir and from the reservoir back to the channels of the cylinder block.

It is advantageous in relation to the invention that the reservoir of a piston acting in two directions in two Chambers is divided, each of which has a conduit

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the associated end of the cooling channels of the cylinder block is connected, and that the pump, which is optionally in the one or in another direction, is interposed in one of the lines.

This arrangement closes the cooling system. One of the chambers in the reservoir contains cold coolant, if the engine is running. As soon as the engine is switched off, the warm liquid from the cylinder block is transferred to the other chamber pumped, which moves the piston in the reservoir and thus the coolant is pressed to the channels of the cylinder block.

Before restarting the machine, the pump is now started in the opposite direction, so that the stored warm cooling liquid is transported from the second chamber to the channels of the cylinder block and in the same way the cold cooling liquid from the cylinder block into the first chamber is pushed back.

The device has proven to be particularly advantageous to equip with the features of claim 5. The pump therefore only works until the respective liquid runs out the single chamber is pushed out and the piston has reached the end of the chamber.

The invention is described in more detail below with an exemplary embodiment.

Show it:

1 shows a schematically illustrated liquid-cooled internal combustion engine with the improvements according to the invention and

FIG. 2 shows an enlarged schematic illustration of the storage container in section from FIG. 1.

Figure 1 shows a liquid-cooled internal combustion engine, the cylinder block 1 with a number of not shown Channels are equipped for the flow of the cooling liquid, which is also routed via an air-cooled heat exchanger, known as the so-called cooler. One end of the channels of the cylinder block 1 is through a line 5 'with the optional connected in one or the other direction working pump 3, which in turn with a first chamber 2 'of an isolated Reservoir 2 is in communication. In the reservoir 2, the first chamber 2 'is separated from a second chamber 2 "by a reciprocating piston k. This second chamber 2" is connected to the other end of the channels of the cylinder block 1 by a line 5 ".

As long as the machine is running, the coolant is in the Channels of the cylinder block 1 heated. If the engine is switched off, the pump 3 starts to work and pumps the heated cooling liquid from one end of the channels of the cylinder block 1 to the first chamber 2 'of the storage container. Through this the reciprocating piston moves so that the Unite cooling liquid from the second chamber 2 "to the other end of the channels of the cylinder block 1 is pressed.

However, before the machine is started again, the pump 3 brings the liquid in the reverse direction into the circuit, so that now the warm cooling liquid is transported from the insulated reservoir 2 to the cylinder block 1, while the cold coolant flows from the cylinder block 1 back into the reservoir.

But to allow a heat exchange in the two chambers between

to prevent the hot and cold coolant the flask h must also be adequately insulated.

The motor of the pump 3 can be put out of operation by limit switches which are actuated by the piston h in the storage container. However, it is more advantageous to use a timing relay that ensures that the pump only works in a period of time relative to the volume of the reservoir 2.

Claims (5)

PATENT AGENT _# · "· · ζ \ I ° l" Z. "' DIPL.-ING. VOLKER SASSE *** " *" * """***" ** Cbiemgaustraße 8a D 8070 INGOLSTADT EUROPEAN PATENT ATTORNEY Telephone 08 41/8 27 90 October 19, 1982 JDä-U SlM • Patent attorney Dipl.-Ing. V. Sann, ChicmgniiitraUo 8a, 07 Ingohtadt Applicant: Niels Thure Hallin, Rulkedalen 110, DK-5260 Odense S. Method for operating a liquid-cooled internal combustion engine, as well as a device for performing the Procedure Claims lJ method for operating a liquid-cooled internal combustion engine, the cylinder block of which is equipped with channels for the circulation of the cooling liquid, which is passed through an air-cooled heat exchanger, characterized in that when the engine is switched off, the warm cooling liquid is transported to an insulated storage container and before restarting of the engine, the liquid is returned from the storage tank to the coolant system of the cylinder block. 2. Apparatus for performing the method according to claim 1 in a liquid-cooled internal combustion engine, the cylinder block (IJ is equipped with channels for the circulation of the cooling liquid, characterized in that it has an insulated storage tank (2) and a pump (3) with the Bank accounts: Deutsche Bnnk Ingolstsult 23/51310 BLZ 72170007 Postal checking account Munich 225940-800 BLZ 70010080 the coolant from the channels of the cylinder block (IJ to Storage container (2) and from the storage container (2) to the channels of the cylinder block (U can be conveyed back. 3. Apparatus according to claim 2, characterized in that the storage container (2) is divided into two chambers (2 'and 2 ") by a reciprocating piston (k), each of which via a line (5' or 5 ") is connected to the respectively assigned end of the cylinder block ducts (inlet or outlet), and that the pump (3), which can optionally deliver in one or the other direction, in one of these lines (5 ', 5") is connected between. k. Device according to Claim 3, characterized in that the piston (U) consists of a heat-insulating material or is covered with it. 5. Device according to one of claims 2 to h, characterized in that in the storage container (2) in the region of the end faces for switching the pump (3) on and off limit switches (6, 7J are provided, which are from the reciprocating piston (k) can be switched off.