CS256303B1 - Self-suction stage of pump for highly supercharged internal combustion engines' cooling system - Google Patents

Description

The invention relates to a self-priming stage of a coolant circuit pump of highly supercharged internal combustion engines.

The self-priming pumps currently in use are expensive to produce accurately, to produce materials and have a short lifetime. The designer endeavors to create conditions for the self-priming effect by means of additional equipment to non-self priming pumps.

One of the known words for this requirement is to include an ejector in the suction circuit of a non-self-priming pump. This issue is addressed, for example, Czechoslovakia A0 224 254, where the evacuation pipeline with an ejector is connected to the intake rules of the internal combustion engine. The disadvantage of this embodiment is the impossibility of flooding the pump with water before starting the engine. This causes the pump to run idle for a certain period of time after start, resulting in heavy wear and shortened service life.

Another well-known saying, for example, according to ČSSR АО 198 095, is to connect a pump with an ejector, where the ejector uses the exhaust stream of an internal combustion engine. Again, however, there remains the disadvantage of running the pump idle and the dependence of the suction effect on the engine running.

The foregoing disadvantages of the present disclosure eliminate the self-priming stage of the highly turbocharged internal combustion engine coolant pump circuit, comprising a compressed air engine control circuit, a pump, a level switch, a remote control valve and an ejector according to the invention. provided with a magazine

2SB 303 of the compressed air, the start valve and the ejector valve 4 is connected to the pump outlet and through the pump to the suction line, with an ejector positioned between the start valve and the ejector valve. A common level switch located at the pump outlet is connected to the start valve and the ejector valve, and the engine cooling circuit check valve is located downstream of the pump outlet and level switch, and the suction strainer check valve is located at the beginning of the intake manifold.

The advantage of this design of the self-priming stage of the pump is, above all, the possibility of flooding the pump with water before starting the engine, which makes it possible to utilize the air management of the internal combustion engine used for starting or controlling other devices. In this case, the pump does not run idle. After start-up, the system switches off automatically and the dependent pump supplies cooling water in the usual way. This extends the service life of the pump, the device works reliably and is neither technologically nor structurally demanding.

An example of a particular embodiment of the self-priming stage of the pump according to the invention is shown in the attached drawing, where the connection of the main parts is schematically illustrated.

The drawing shows the engine control circuit 11 connected to the compressed air reservoir (nondexornlin), on which a remotely controlled start valve 10 and an ejector valve 7 are arranged, between which an ejector 8 is arranged. A common surface level is connected to the start valve 10 and ejector valve 7. a switch 4 by means of a control line 12 located at the pump outlet 14 and 2a through the pump outlet 14 and the level switch 4 is a non-return flap 5 of the engine cooling circuit 6 and a suction basket return flap 7 is located at the beginning of the intake manifold 13.

If the pump 2 is not flooded with water, the remote-controlled start-up valve 10 and the ejector valve 7 are opened either by means of the level switch 4 or at the operator's command. Compressed air starts to flow from the engine control circuit 11 and creates a suction effect via the ejector 8 to allow air to be pumped out of the intake manifold 13, the water overflows the pump 3 and outlet 1 4.

... 258 303 of the valve 10 and the ejector valve 7 and the ejector 8 are disabled. Excess water is discharged out of the drain 9 and may be followed by a start of the engine, in which the dependent pump 3 supplies water to the engine cooling circuit 6 in a conventional manner in a conventional manner. If the water level drops below the level switch 4 after the engine has stopped, the ejector 8 is put into operation again and the entire self-priming cycle is repeated. The non-return valve 2 maintains the water column in the intake line 13, the pump 6, the outlet 14 of the pump 3, and the engine cooling circuit 6. The non-return valve closes the engine cooling circuit 6 when the air is drawn through the ejector 8.

Claims (2)

Self-priming stage of a highly supercharged internal combustion engine cooling circuit pump, comprising a compressed air engine control circuit, a pump, a level switch, a remote control valve and an ejector, characterized in that the engine control circuit (11) provided with a compressed air reservoir triggering valve (10) and ejector valve (7), is connected to the outlet (14) of the pump (3) < via a pump (3) to the intake manifold (13), and between the start valve (10) and the ejector valve (7) ejector (8). Self-priming pump stage according to claim 1, characterized in that a common level switch (4) located at the outlet (14) of the pump (3) is connected to the start valve (10) and the ejector valve (7). Self-priming pump stage according to Claims 1 and 2, characterized in that a non-return valve (5) of the engine cooling circuit (6) and at the beginning of the suction line (13) is located downstream of the pump outlet (14) and the level switch (4). ) the non-return valve (2) of the suction basket (1) is located.