RU129151U1 - THERMOSTAT UNIT FOR INTERNAL COMBUSTION ENGINES - Google Patents

Abstract

A thermostat valve assembly for cooling circulation of an internal combustion engine, comprising: a thermal actuator (1) inserted inside the valve (3); a seal (2) located in a groove (4) on the valve (3), which prevents the flow of coolant from the cylinder block into radiator in the closed position of the valve (3), the frame (9) with the gripping elements (10) of the frame, which steadily hold the thermostat inside the housing (14), the spring (7), which forces the valve to close when the coolant temperature drops down, characterized by internal gripping elements (13) inside the valve (3) so that the pressed-in thermo actuator (1) and valve (3) move together, a bypass barrier (8) and a semicircular passage (11).

Description

2420-190375RU / 092

THERMOSTAT UNIT FOR INTERNAL COMBUSTION ENGINES

DESCRIPTION

Technical field

This utility model relates to a thermostatic unit for cooling circulating systems of internal combustion engines to stabilize the temperature of the coolant in the range corresponding to the engine design.

Known state of the art

In internal combustion engines with a liquid cooler, the excess heating that occurs due to the combustion of the fuel is transferred through the coolant that circulates through the channels in the cylinder block and cylinder head. Due to this, the engine can operate in the proper temperature range. Today, the reduction of total emissions of harmful gases into the environment from internal combustion engines is one of the biggest design problems due to regulatory documents, which from year to year reduce the rate of allowable emissions. In phases in which the engines operate at temperatures other than the intended temperature range, the engines release harmful gases with high emission levels. For this reason, in order to ensure that the engine operates in the right temperature range, stabilizing the temperature of the coolant and engine temperature helps to efficiently burn fuel and reduce the emission of harmful gases.

Thermostats of internal combustion engines perform this task by closing and opening their valve in the passage for the flow of coolant from the cylinder block to the radiator; in accordance with the fact that opening and closing they regulate the temperature. They are adjustable for the effective temperature range of the engine. If the temperature is higher than the effective temperature of the engine, the thermostat valve opens the flow to the radiator to cool the coolant. In low temperature conditions, the thermostat valve remains in the closed position.

Wax-type thermostats are the most common solution for modern engines to keep the engine in the proper temperature range. Their principle of operation is based on the expansion of the wax compound as the temperature rises. The wax compound is filled inside the wax capsule, while it moves the piston bottom of the wax capsule, expanding due to an increase in temperature, and this mechanism is called a thermal actuator. They regulate the effective temperature range of the engine by using a suitable wax compound, the thermal expansion of which coincides with the effective temperature of the engine. This expansion causes the valve to open to cool the coolant through a mechanism that varies according to the design of the thermostat. Wax-type thermostats are subject to change.

In a utility model, an alternative thermostat assembly is provided that contains a conventional wax actuator, a valve, a seal on the valve, on which the valve is located on the body to close the flow of coolant into the radiator, a spring that acts on the valve, to close when the temperature of the coolant drops down, the frame within which the valve is guided.

Description of figures

This utility model is explained in detail using the following figures. The figures are just an example. In these figures:

Figure 1 is an exploded view of a thermostat assembly.

Figure 2 - 3D image of a thermostat assembly.

Figure 3 - image in cross section of a thermostatic unit.

Figure 4 is a cross-sectional image of a thermostat assembly without a thermal actuator.

Figure 5 is an example of the use of a thermostat assembly in a motor circulation system.

Link Description

1 Thermal actuator (containing wax, wax capsule, piston)

2 Seal

3 valve

4 seal groove

5 valve levers

6 Valve gripping elements

7 spring

8 Frame Bypass Barrier

9 frame

10 Gripping frame elements

11 Semicircular aisles

12 Runners (on frame)

13 Internal gripping elements (for installing a thermal actuator)

14 Case

15 cover

Utility Model Description

The wax compound is filled inside the wax capsule, while it moves the piston bottom of the wax capsule, expanding under the influence of temperature, this mechanism is called the thermoactuator (1), expansion and contraction of the wax compound inside the capsule due to temperature changes gives rise to a linear motion of the thermoactuator piston ( 1), the bottom of which is located on the housing (14). The thermal actuator (1) is installed in the internal gripping elements (13) inside the valve (3), so that they move together (figure 3 - figure 4). The press fit of the thermal actuator (1) in the internal gripping elements (13) strengthens the levers (5) of the valve and prevents them from stretching in order to avoid disconnecting the valve (5) from the frame (9), while this valve (3) is assembled using valve gripping elements (6) inside the sliders (12) of the frame (9). The movement of the thermal actuator (1) opens and closes the valve (3). There is a seal (2), which is located on the groove (4) of the valve (3) to block the flow of coolant from the cylinder block into the radiator between the valve (3) and the body (14) when the valve (3) is in the closed position.

Valve gripping elements (6) are guided inside the frame (9) by runners (12) on the inner surface of the cylindrical-shaped frame (9). The valve (3) performs a rectilinear movement with a thermal actuator (1) using the levers (5) of the valve inside the frame (9). The thermoactuator piston (1) is located on the housing (14), and the side of the frame flange (9) is located on the housing (14) with the help of the gripping elements (10) of the frame placed in the channels on the housing (14) (figure 5). These gripping elements (10) of the frame stably hold the thermostat inside the housing (14) and do not reflect the force of the spring (7) on the cover (15). The outer edges of the frame (9) are located in the housing (14) and provide a seal between the housing (14) and the frame (9).

Increasing the temperature of the coolant is reflected in the wax connection inside the thermal actuator (1), the expansion of the wax connection inside the thermal actuator moves the piston, and it opens the valve (3). By opening the valve (3) from a large cross section, a large flow of coolant flows into the radiator from the cylinder block to lower the temperature of the coolant in the radiator. In this position, which is called the open position of the valve, the levers (5) of the valve move down the frame (9), and it is surrounded by a bypass barrier (8) of the frame (9), so that it prevents flow in the direction of the bypass in the cooling system. Through the passage (11) with a semicircular shape, there is only a small hole in the barrier, which ensures that the temperature of the coolant around the thermal actuator (1) is the same as the actual temperature of the coolant in the cooling system. This feature helps the correct movement of the thermal actuator (1) according to the actual temperature of the system.

In the event of a drop in coolant temperature, the wax compound loses volume inside the wax capsule, and the spring (7) closes the valve (3). A spring (7) is installed between the valve (3) and the frame flange (9).

Claims (1)

A thermostat valve assembly for cooling circulation of an internal combustion engine, comprising: thermal actuator (1) inserted into the valve (3); a seal (2) located in the groove (4) on the valve (3), which prevents the flow of coolant from the cylinder block into the radiator in the closed position of the valve (3), a frame (9) with gripping elements (10) of a frame that stably hold the thermostat inside the housing (14), a spring (7) that forces the closing of the valve when the coolant temperature drops down, characterized by internal gripping elements (13) inside the valve (3), so that the pressed-in thermal actuator (1) and valve (3) move together, bypass barrier (8) and passage (11) of a semicircular shape.

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