SU1153091A1 - Cooling system of turbocharged internal combustion engine - Google Patents

Abstract

1. COOLING SYSTEM - INTERNAL COMBUSTION MOTOR WITH TURB-SUPPLY DUED, containing a coolant circulation circuit, including a cooling jacket and a radiator, equipped with a lower and upper tanks, a circulation pump, the suction nozzle of which is connected to a lower radiator, and an aperture pump, an aperture pump, an aperture pump, an aperture pump, an aperture pump, an aperture pump, an aperture pump, is connected to a lower radiator, an aperture pump and an aperture pump, an aperture pump, an aperture pump, an aperture pump, is connected to a lower radiator tank, and an aperture pump is installed; , and a charge air cooler connected through its inlet and outlet channels to the coolant circuit, and a partition is installed in the lower radiator tank, It is divided into two cavities, the first of which is connected to the suction inlet of the pump, and the second to the inlet channel of the charge air cooler, the outlet of which is connected to the suction inlet of the pump, which is designed to increase efficiency by ensuring optimal temperature conditions , the lower and upper radiator tanks are provided with additional partitions, kami, with the first partition of the upper tank installed opposite the first partition of the lower tank, forming a closed section the radiator, and the other partitions of the upper tank, starting from the second, are displaced relative to the partitions of the lower tank to form a channel, successively connecting (the left cavity of the upper and lower tanks, and part of the partitions are provided with openings with bypass valves, and the first closed cavity of the upper radiator tank is connected with a centrifugal pump discharge pipe, forming a pressure cooling circuit including a charge air cooler. cd 2. The system of claim 1, wherein the by-pass valves are temperature controlled by the temperature of the coolant.

Description

The invention relates to mechanical engineering, in particular, to power plants of vehicles, namely to cooling systems of turbocharged internal combustion engines.

The purpose of the invention is to increase the efficiency of the system.

FIG. 1 is a schematic of a cooling system; in fig. 2 - the radiator of this system, a general view; in fig. 3 shows an embodiment of a radiator with additional tubes.

The system contains a radiator 1, in the lower and upper tanks of which partitions 2-7 are installed (Fig. 2), separating radiator tanks on cavities 8 and 9 and additional cavities 10-15 (Fig. 2).

The cavity 8 of the lower tank of the radiator 1 is connected to the inlet pipe 16 (Fig. 1) of the circulation pump 17, the outlet pipe 18 of which is connected to the cooling jacket of the cylinder block 19 connected by pipe 20 to the cavity 15 of the upper radiator tank 1. The cavity 9 of the lower radiator tank 1 is connected by a pipe 21 (FIG. 2) and a pipe 22 (FIG. 1) to a water inlet channel 23 of the liquid cavity of the cooler 24, the water outlet channel 25 of which is connected by a pipe 26 to the inlet pipe 16 of the circulation pump 17.

The outlet pipe 18 of the pump 17 is connected by pipe 27 to one of the additional cavities 10 of the upper tank of the radiator 1. The bulkheads 3 and 4 of the lower tank are successively shifted along the direction of the coolant relative to the corresponding previous bulkheads of the upper tank. Partitions 2 and 7 are located opposite each other, i.e. performed without displacement. In partitions 5 and 6, temperature-controlled valves 28 and 29 are installed. The inlet 30 of the air cavity of the cooler 24 is connected to the turbo compressor 31, and the outlet 32 - to the intake manifold 33 of the engine.

In one embodiment of the radiator 1 (Fig. 3), additional discharge pipes 34 and 35 are installed in the cavities 11 and 13 to form additional cooling circuits with different coolant temperatures.

When the engine is running, it is heated in the cooling jacket of the cylinder block 19 with a liquid pump. 17 is fed into the cavity 15 of the upper tank of the radiator 1. The cooled fluid enters the cavity 8 of the lower tank of the radiator, from where it goes to the inlet 16 of the pump 17. At the same time, part of the fluid cooled in the radiator 1 is discharged from the inlet pipe 18 of the pump 17 through the pipeline 27 to the cavity 10 upper radiator tank and successively passes additional cavities 11-14 and 9 upper

and the lower tank of the radiator 1, while cooling to a temperature lower than its temperature in cavity 8, where the liquid flows directly from the upper cavity 15. The most cooled liquid from cavity 9 through line 22 is fed to the cooler 24 in the inlet 23. the channel 25 of the latter. The liquid through the pipe 26 is supplied to the inlet of the pump 17.

During the engine start-up period at idling and partial load conditions, it is impractical to cool the charge air deeply from the point of view of achieving better economy.

5 In these operating modes, the coolant temperature at the engine outlet is lower than in operating modes close to the nominal one. The position of the temperature controlled valves 28 and 29 depends on the coolant temperature at the outlet

0 of the engine.

When the engine is operating at rated power, they are in the closed position.

When the engine switches from more loaded modes to idling and partial loads, the coolant temperature at the engine output decreases, temperature-controlled valves 28 and 29 open and fluid from cavity 10, mine 11 and 13, passes through cavities 12, 14, 9 and then through the pipeline 22 into the inlet channel 23 of the fluid cavity of the cooler 24.

After the engine has been preheated during start-up or after the engine has switched to operating modes close to nominal,

the temperature of the coolant at the engine outlet increases, valves 28 and 29 close and fluid from cavity 10 passes through cavities 11-14 and 9 sequentially, is cooled down deeply and is fed into the inlet channel of the cooler 24. As the temperature of the coolant gradually decreases as it passes from the cavity to the cavity, then when it is withdrawn through the pipes 34 and 35, additional contours are formed from the cavities 11 and 13

5 with different temperatures of the fluid that is supplied to cool other units, for example, to the heat exchangers of the hydraulic oil transmission and transmission gearboxes.

The cooling system allows for multi-stage and deeper cooling of the fluid supplied to the charge air cooler, as well as automatic regulation of the cooling of the supercharged air during start-up and partial engine loads.

Creating additional cooling circuits with different coolant temperatures makes it possible to increase the thermal efficiency of other units of the cooling system.

Thus, providing a deeper cooling of the charge air in the cooling system, controlling the degree of its cooling, creating optimal temperature regimes in heat exchangers

,20

thermal transfer oils, gearboxes, etc. it allows to increase the efficiency of its work, leads to an increase in the engine's efficiency, a decrease in the thermal stress of the parts of the cylinder-piston group of the engine, an increase in the reliability of the engine and the entire vehicle.

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FIG. five

Claims (2)

1. COOLING SYSTEM TURBOCHARGED INTERNAL COMBUSTION ENGINE, containing a coolant circuit, including a cooling jacket and a radiator, equipped with lower and upper tanks, a circulation pump, a suction pipe which is connected to the lower radiator tank, and a pressure pump - with the engine cooling jacket, and an air cooler, through its water inlet and water outlet to the coolant circuit, and in the lower tank of the radiator a partition is installed that divides it into two cavities and, the first of which is connected to the suction pipe of the pump, and the second to the water inlet of the charge air cooler, the water outlet of which is connected to the suction pipe of the pump, characterized in that, in order to increase efficiency by ensuring optimal temperature conditions, the lower and upper tanks of the radiator equipped with additional partitions, and the first partition of the upper tank is installed opposite the first partition of the lower tank, forming a closed section of the radiator, and other partitions in the first tank, starting from the second, is displaced relative to the partitions of the lower tank § with the formation of a channel sequentially connecting the cavities of the upper and lower tanks, and part of the partitions is equipped with openings with bypass valves, and the first closed cavity of the upper radiator tank is connected to the discharge pipe of the centrifugal pump, forming a pressure head a cooling circuit including a charge air cooler. 2. The system by π. 1, characterized in that the bypass valves are temperature-controlled by temperature of the coolant.