Protection method and protection device for engine and engine supercharger

Abstract

The invention provides a protection method and a protection device for an engine and an engine supercharger. The protection method for the engine supercharger comprises the following steps that: a first set supercharge pressure data acquired from a pressure-temperature sensor on an air inlet tube of the engine is preset to a pressure warning value, a second set supercharge pressure data acquired from the pressure-temperature sensor is preset to a torsional limit value; the supercharge pressure data of the pressure-temperature sensor is acquired in real time when the engine is in a stable working condition; a safety alarm instruction is sent when the supercharge pressure data achieves the pressure warning value; a torsional limit instruction is generated when the supercharge pressure data achieves the torsional limit value. According to the embodiments of the invention, the pressure value of the air inlet tube of the engine can be monitored in real time, thus guaranteeing that an alarm can be sent or the torsion limit can be performed when the deflation valve of the supercharger is failed, therefore, potential safety hazards due to the faults of the deflation valve of the supercharger are effectively eliminated.

Description

technical field [0001] The invention relates to the mechanical field, and more specifically relates to a method and a device for protecting an engine and an engine supercharger. Background technique [0002] With the increasingly stringent requirements of engine emission regulations, the application of various engine aftertreatment technologies has been rapidly popularized. For the sake of cost control, many engine manufacturers use turbochargers with ordinary bleed valves in the selection of superchargers, and then use EGR (Exhaust Gas Recycling, exhaust gas recirculation), oxidation-type catalytic converters, particulate filters or selective catalytic reduction technologies to meet the emission requirements of different standards. [0003] Take an engine that adopts EGR and cooperates with an ordinary turbocharger with a blow-off valve as an example. When matching the turbocharger, it is necessary to consider the EGR drive capability. In this way, it is necessary to sacri...

AI Technical Summary

Problems solved by technology

This is because, if the bleed valve cannot be opened normally, it may cause the turbocharger to block and overspeed and fail, that is, the technical solution in the prior art may cause the turbocharger to fail, thereby causing a safety hazard

Images