Turbocharger deflation valve capable of being self-adapted to height above sea level

Abstract

The invention provides a turbocharger deflation valve capable of being self-adapted to a height above the sea level. The turbocharger deflation valve is matched with gas pressure of a gas intake boosting channel to adjust exhaust airflow flowing towards a turbocharger and comprises a shell. A plurality of splitter plates are arranged inside the shell. The inner space of the shell is divided into four sub parts of a two-position three-way pneumatic valve, an actuator, an adjustable throttling device and a gas-bag-type pressure compensation device. The two-position three-way pneumatic valve and the actuator both communicate with the gas intake boosting channel. The two-position three-way pneumatic valve controls the moving direction of the airflow flowing through the actuator. The adjustable throttling device changes the pressure amplitude of gas flowing past the actuator. The gas-bag-type pressure compensation device controls the opening degree of the adjustable throttling device. The turbocharger deflation valve capable of being self-adapted to the height above the sea level is simple in structure, no external energy is required, and the accurate control influence on the opening pressure of the turbocharger deflation valve by real-time change of the gas intake pressure is small.

Description

technical field [0001] The invention belongs to the technical field of engine turbochargers, and in particular relates to an adaptive altitude-adaptive turbocharger blow-off valve, which is used for controlling the exhaust airflow flowing to the turbocharger. Background technique [0002] One of the factors limiting the performance of internal combustion engines is insufficient air intake. The use of turbochargers on internal combustion engines to increase the intake air volume and improve the performance of internal combustion engines has been extensively studied and successfully applied to engineering. However, under certain conditions, turbocharged If the air intake boosting capacity of the turbocharger is too high, the explosion pressure in the cylinder will be too high, and the reliability of the engine will decrease. In addition, the overspeed operation of the turbocharger will also cause damage to the turbocharger. It is known that the exhaust gas flow to the turbocha...

AI Technical Summary

Problems solved by technology

However, a problem that is difficult to solve is that as the altitude increases, the reduced atmospheric pressure will cause the purge valve to open earlier, making it difficult to take into account both high and low altitude conditions.

For example, as the altitude increases, the atmospheric pressure decreases. Under the same intake pressure, the intake air flow at high altitudes decreases, and there is also the problem of insufficient intake air and poor performance. Therefore, high altitudes require higher intake pressure to maintain Power performance, but due to the lower atmospheric pressure at high altitudes, the resistance to overcoming the bleed valve is also reduced, and the opening pressure of the bleed valve is reduced instead, making it difficult for the engine to exert the huge advantages of turbocharging in high altitude areas

[0004] It is already known that by using a supercharger with an electronic or hydraulic control bleed valve, the exhaust gas flow to the turbocharger can be adjusted in real time according to different altitude conditions. However, the above-mentioned control system has difficulties in layout, high cost, and reliability. lower sex issues

By adopting the vent valve with air bag type air pressure self-compensation function, such as the Chinese patent ZL2006101263921 with the invention name "Altitude Compensation of Turbocharger Exhaust Valve", it can have the advantages of simple structure and low cost, but because the invention adopts The airbag directly changes the installation spring principle of the spring through the lever to control the opening pressure of the deflation valve. On the one hand, the airbag needs to overcome a higher reaction force, which increases the volume of the airbag to increase the necessary actuation force. On the other hand, when the spring moves Some interference with the airbag, which makes precise control of the deflation valve difficult

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