Protection method and protection device for engine and engine supercharger

A protection device and engine technology, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve problems such as turbocharger blockage and overspeed, safety hazards, turbocharger failure, etc., and achieve the effect of eliminating safety hazards

Active Publication Date: 2014-04-23
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is because, if the bleed valve cannot be opened normally, it may cause the turbocharger to block and overspeed an...

Method used

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  • Protection method and protection device for engine and engine supercharger
  • Protection method and protection device for engine and engine supercharger
  • Protection method and protection device for engine and engine supercharger

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] When matching the turbocharger, the surge margin, blockage margin, and plateau margin of the combined operation line of the engine should be considered on the basis of meeting the target performance of the external characteristics of the engine, so as to ensure the safety performance. When matching the supercharger, in order to take into account the medium and low speed performance, the ordinary bleed valve turbocharger often needs a certain degree of bl...

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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...

Claims

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Application Information

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IPC IPC(8): F02B39/14
Inventor 高翠龚英利姚旺宋业栋史中杰
Owner WEICHAI POWER CO LTD
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