SU461237A1 - Intake system for a supercharged internal combustion engine - Google Patents

Description

one

The invention relates to the field of engine building.

Intake systems for an internal combustion engine, such as diesel diesel, are known that contain an adjustable cooler installed in the intake manifold between the supercharger and the cylinders and a bypass line included in the manifold with a flap and a heat exchanger placed in it, which are dispensed by valve, controlled transducer associated with a temperature sensor.

However, the known systems are not effective under changing environmental conditions and operating modes of the engine itself.

The aim of the invention is to ensure the optimum temperature of the air entering the cylinders, depending on the engine mode.

For this, a temperature sensor is installed in the intake manifold between the cooler and the cylinders, and the converter is connected to the cooler control unit and the flap.

The proposed system for an internal combustion engine with supercharging provides for preheating the charge air at low ambient temperatures and when the engine is running at partial loads and idling to optimum temperature values due to exhaust heat and cooling of the air in the cooler at high ambient temperatures and engine loads .

The drawing is a schematic diagram of an intake system for an internal combustion engine with a supercharged engine.

Engine 1 has a supercharging unit consisting of a turbine 2 and a supercharger 3. In the intake manifold between the supercharger and the cylinders, an adjustable cooler 4, heat exchanger 5, washed with exhaust gases, valve 6, valve 7 and charge air temperature sensor 8 are installed. Through the cooler 4, the outside air (cooling medium) is blown by means of the regulator 9 of the cooler, the capacity of which is varied by the converter 10 of the regulator of the cooler.

The flap position is changed by a relay mechanism consisting of a converter 11, a valve 12 and a relay 13, and the position of the valve 7 is a mechanism 14. The converters 10, 11 and the mechanism 14 are controlled by a sensor 8.

When the charge air temperature / 2 is below the lower control limit, the output signal Рg of sensor 8 has the highest value. In this case, the position of the converter 10 is such that the capacity Gg of the regulator 9 is zero, and the position of the converter 11 and the mechanism 14 is such that the valve 6 occupies the uppermost position and the valve 7 has the lowest position. All the air from the blower 3 with the temperature ti passes through the heat exchanger 5. The system works with the maximum possible charge air heating.

When temperature 2 (above the lower limit of regulation) increases, the signal PZ of sensor 8 decreases, mechanism 14 moves valve 7 upwards, and some gas is passed to exhaust, heat exchanger 5 passes. Heating of charge air decreases, and increase in yy stops.

When the temperature of the lower control limit 2 is approximately equal to half the range (static unevenness) of the control, the signal Pg such that the relay 13 is activated switches on the valve 12, which supplies air pressure PI to the converter 11, which moves the flap 6 to its lowest position. Thereafter, all of the injected air flows through cooler 4, valve 7 occupies the uppermost position, and all gas goes to the exhaust, heat exchanger 5 passes. Heating of the charge air is stopped.

With a further increase in temperature 2, the signal 2 of the sensor 8 will decrease, the position of the converter 10 will change and the efficiency of the regulator 9 will increase. At the same time, the charge air cooling will be regulated and the temperature 2 will be maintained within the second half of the adjustment range.

When the temperature tz decreases, the signal Pr of the sensor 8 increases, the efficiency of the regulator 9 decreases, and the cooling of the charge air in the cooler 4 decreases, and the decrease 2 stops.

When reducing iz to half the range

the control signal PZ is increased so that. Relay 13 turns on valve 12, and converter I moves valve 6 to its highest position, with all the air passing through heat exchanger 5. The cooling of the charge air stops.

With a further decrease of 4, the signal of the PZ sensor increases, the mechanism 14 moves the valve 7 down, the amount of gas going through the heat exchanger 5 increases. This increases the preheating of the charge air and the decrease in its temperature (4) is stopped.

Thus, the intake system for a supercharged internal combustion engine maintains the charge air temperature at a given optimal level regardless of changes in the outside air temperature.

Subject invention

The intake system for a supercharged internal combustion engine, such as a diesel diesel engine, contains an adjustable cooler installed in the intake manifold between the supercharger and cylinders and a bypass line included in the manifold with a valve and heat exchanger placed in it, washed by exhaust gases, which are dispensed using a valve, controlled by a transducer associated with a temperature sensor, characterized in that, in order to ensure an optimum temperature entering the cylinders depending on the engine mode, a temperature sensor is installed in the intake manifold between the cooler and the cylinders, and the communication converter with

cooling regulator and damper.