Fuel cut-off protection device for turbocharger

Abstract

The invention discloses a fuel cut-off protection device for a turbocharger. The fuel cut-off protection device comprises a three-way oil tube, wherein the first branch of the three-way oil tube is connected with the turbocharger; the second branch of the three-way oil tube is connected with a lubricating oil circuit of an engine; the third branch of the three-way oil tube is connected with the fuel cut-off protection device of the turbocharger; a one-way valve which is conducted from the engine to the three-way oil tube along a single direction is arranged in the first branch; and the fuel cut-off protection device is used for storing lubricating oil during normal running of the engine, and inputting the stored lubricating oil into the turbocharger when the engine stops running. The fuel cut-off protection device for the turbocharger can be used for storing lubricating oil during running of the engine, and can be used for inputting the stored lubricating oil into the turbocharger when the engine stops running to cool and lubricate, so that energy can be saved; and the fuel cut-off protection device for the turbocharger is suitable for the situations of frequent start and stop and halt and unexpected halt of the engine.

Description

technical field [0001] The invention relates to an oil stop protection device, in particular to a turbocharger oil stop protection device. Background technique [0002] Superchargers have been widely used in engines because of their effectiveness in increasing engine power, reducing fuel consumption, and improving emissions. Since the turbocharger is connected to the exhaust pipe during operation, and the speed of the turbocharger is as high as hundreds of thousands of revolutions per minute during normal operation, it is necessary to ensure that the rotating shaft and bearing of the turbocharger are well lubricated, and at the same time A large amount of heat inside the supercharger is taken away from the supercharger through the flow of lubricating oil, thus playing a protective role. [0003] For the supercharger, the traditional lubrication and cooling method is to provide a certain amount of oil and oil pressure through the oil pump to lubricate the supercharger of the...

AI Technical Summary

Problems solved by technology

[0005] 1. During normal shutdown, to cool the supercharger, the engine needs to idle for a long enough time, which will waste a lot of energy;

[0006] 2. If the engine suddenly stops due to uncertain factors, it is impossible to continue to provide oil to the supercharger for lubrication protection at this time. , the impeller of the supercharger will continue to rotate for a period of time without oil, which may cause local overheating of the supercharger, burn the shaft and bearing of the supercharger, and reduce the service life of the supercharger and even the whole machine;

[0007] 3. On some engines that often start and stop frequently, such as diesel and electric hybrid engines, there is not enough time to idle to dissipate heat, and the idle mode cannot meet the requirements for effective protection of the supercharger

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