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Engine cracking monitoring method and device

An engine and engine controller technology, applied in engine components, machines/engines, mechanical equipment, etc., can solve problems such as damage to engine parts and endanger user safety, and achieve the effect of ensuring safety and timeliness.

Active Publication Date: 2019-01-25
WEICHAI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide variety of vehicle uses and users' usage conditions, the cracking of the engine is also very different. For the cracking that has already occurred, if it cannot be repaired in time, it will cause further damage to the engine parts, thus endangering the safety of users.

Method used

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  • Engine cracking monitoring method and device

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Embodiment Construction

[0045] 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.

[0046] SCR (Selective Catalytic Reduction) technology: Selective catalytic reduction technology, using urea solution to treat the nitrogen oxides in the exhaust of diesel engines to reduce the nitrogen oxides in the exhaust of diesel engines.

[0047] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawin...

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Abstract

The invention provides an engine cracking monitoring method and device. The method comprises the following steps: when determining that an engine meets a preset monitoring condition, receiving a theoretical SCR upstream exhaust temperature which is transmitted by an engine controller and is calculated theoretically and an actual SCR upstream exhaust temperature which is obtained through actual measurement; calculating the temperature difference between the theoretical SCR upstream exhaust temperature and the actual SCR upstream exhaust temperature; judging whether the temperature difference isin a preset temperature difference allowing range or not; if the temperature difference is in the preset temperature difference allowing range, determining that the engine is not in a cracking state;and if the temperature difference is not in the preset temperature difference allowing range, determining that the engine is in the cracking state. Engine cracking monitoring is not based on suggested time and mileage, but in the full life circle of the engine, cracking symptoms of the engine can be monitored all the time, thus, timeliness of correction of the engine can be ensured, and the usersafety of a user is ensured.

Description

technical field [0001] The invention relates to the technical field of engines, and more specifically relates to a method and device for monitoring engine cracking. Background technique [0002] The engine is the driving force of the car, and its operation is the key factor to determine the performance of the car, so it is very necessary to maintain the engine. [0003] At this stage, engine maintenance is often based on user usage time or vehicle mileage. However, due to the wide variety of vehicle uses and user usage conditions, the engine cracking situation is also very different. For the cracking that has already occurred, if it cannot be repaired in time, it will cause further damage to engine parts, thereby endangering the safety of users. Contents of the invention [0004] In view of this, in order to solve the above problems, the present invention provides a monitoring method and device for engine cracking, and the technical scheme is as follows: [0005] A monit...

Claims

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Application Information

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IPC IPC(8): F02B77/08
CPCF02B77/083
Inventor 耿磊张希杰袁志玲刘正锐
Owner WEICHAI POWER CO LTD
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