Gas alarming method and device for EGR cooler
A technology of EGR cooler and alarm device, which is applied in the field of machinery, can solve the problems of not being able to know the current state of the EGR cooler, and the pressure difference between the inlet pipe and the outlet pipe of the flow capacity of the EGR cooler cannot be evaluated, so as to achieve convenience, real-time, effective and convenient The effect of monitoring and early warning
Active Publication Date: 2015-08-05
WEICHAI POWER CO LTD
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Problems solved by technology
[0004] The above technologies can only prolong the service life of the EGR cooler to a certain extent, but the current state of the EGR cooler cannot be known, for example, the flow capacity of the EGR cooler and the pressure difference between the intake pipe and the outlet pipe cannot be evaluated
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[0038] 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.
[0039] Such as figure 1 As shown, the original EGR cooler includes EGR cooler body 31, EGR cooler inlet pipe 33, EGR cooler outlet pipe 32, EGR cooler water inlet pipe 34, EGR cooler outlet pipe 35, exhaust gas flow regulating valve, high temperature Exhaust gas enters the EGR cooler 31 body from the EGR cooler inlet pipe 33, and after being cooled by the cooling water in the EGR cooler water inlet pipe 34 and the EGR cooler outlet pipe 35, the exhaust gas wit...
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The invention discloses a gas alarming method for an EGR (exhaust gas re-circulation) cooler and a gas alarming device for the cooler. The gas alarming device comprises a pressure-limiting valve assembly, an one-way valve assembly and an alarming trigger assembly; when the EGR cooler is in the initial using stage, the pressure difference between an air inlet pipe and an air outlet pipe is relatively low and lower than the preset one, thus the valve core of the one-way valve assembly is far away from a trigger switch at the moment, and an alarming module is not activated; when the pressure difference between air inlet and outlet pipes of the EGR cooler is more than the preset one, air inlets and overflow holes can be communicated by the pressure-limiting valve assembly, so that the gas in the air inlet pipe enters the one-way valve to drive the valve core to move towards the trigger switch so as to close the trigger switch and activate the alarming module for warning. The gas alarming device only needs to be in parallel connected with air inlet and outlet pipes of an original EGR cooler, and the original EGR cooler is slightly changed and cannot be affected in normal use; according to the gas alarming device, real-time and effective monitoring and early warning of the EGR cooler can be relatively simply and conveniently realized.
Description
technical field [0001] The invention relates to the mechanical field, in particular to a gas alarm method and device for an EGR cooler. Background technique [0002] With the increasing application of exhaust gas recirculation technology in diesel engines, various exhaust gas recirculation (Exhaust Gas Recycling, EGR) coolers have emerged at the historic moment. Most of the existing EGR coolers directly use the coolant of the diesel engine itself. As a medium to cool the exhaust gas, when the diesel engine is recirculating the exhaust gas, the incomplete combustion products HC and soot in the exhaust gas, as well as the sulfide and water vapor produced after the exhaust gas is cooled, are easily attached to the wall of the EGR cooler , with the increase of diesel engine service time, a thick layer of carbon deposits will gradually be formed on the inner surface of the EGR cooler. [0003] The most direct impact of the appearance of carbon deposits on the EGR cooler is the r...
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IPC IPC(8): F02M25/07F02B77/08
CPCY02T10/12
Inventor 李丽丽韩金辉李达范振勇
Owner WEICHAI POWER CO LTD