阅读说明：本技术 增压器卡滞的检测方法、检测装置及发动机 (Supercharger clamping stagnation detection method and device and engine ) 是由 王震华 张娟 贾瑞 于 2019-09-24 设计创作，主要内容包括：本发明属于发动机技术领域,具体涉及一种增压器卡滞的检测方法、检测装置及发动机。该方法包括：获取发动机转速；根据发动机转速达到预设转速的结果,获取发动机的空气滤清器出口处的第一压力和增压器出口处的第二压力,并计算所述第二压力与所述第一压力的第一压力差；比较第一压力差与第一预设压差；根据所述第一压力差小于所述第一预设压差的结果,初次判断所述增压器发生卡滞。本发明增压器卡滞的检测方法,根据空气滤清器出口处的第一压力和增压器出口处的第二压力得到第一压力差,并将第一压力差与第一预设压差相比较,在第一压力差小于第一预设压差的情况下,可确定增压器发生卡滞,由此,提供了一种能够有效判断增压器卡滞的方法。(The invention belongs to the technical field of engines, and particularly relates to a supercharger clamping stagnation detection method, a supercharger clamping stagnation detection device and an engine. The method comprises the following steps: acquiring the rotating speed of an engine; according to the result that the rotating speed of the engine reaches a preset rotating speed, acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger, and calculating a first pressure difference between the second pressure and the first pressure; comparing the first pressure difference with a first preset pressure difference; and according to the result that the first pressure difference is smaller than the first preset pressure difference, the supercharger is judged to be blocked for the first time. According to the method for detecting the jamming of the supercharger, the first pressure difference is obtained according to the first pressure at the outlet of the air filter and the second pressure at the outlet of the supercharger, the first pressure difference is compared with the first preset pressure difference, and the jamming of the supercharger can be determined under the condition that the first pressure difference is smaller than the first preset pressure difference, so that the method for effectively judging the jamming of the supercharger is provided.)

1. A method for detecting supercharger jamming is characterized by comprising the following steps:

acquiring the rotating speed of an engine;

according to the result that the rotating speed of the engine reaches a preset rotating speed, acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger, and calculating a first pressure difference between the second pressure and the first pressure;

comparing the first pressure difference with a first preset pressure difference;

and according to the result that the first pressure difference is smaller than the first preset pressure difference, the supercharger is judged to be blocked for the first time.

2. The method of detecting supercharger jamming according to claim 1, further comprising:

acquiring air flow;

according to the result that the air flow reaches a preset flow, acquiring a third pressure at the outlet of the air filter and a fourth pressure at the outlet of the supercharger, and calculating a second pressure difference between the fourth pressure and the third pressure, wherein the preset flow is larger than the air flow when the engine speed reaches a preset speed;

comparing the second pressure difference with a second preset pressure difference;

and judging the clamping stagnation of the supercharger again according to the result that the second pressure difference is smaller than the second preset pressure difference.

3. The method of detecting supercharger jamming according to claim 2, further comprising: and accumulating and judging the times of the jamming of the supercharger, and sending fault prompt information of the jamming of the supercharger when the times reach 2.

4. A supercharger jamming detection device, comprising:

the receiving module is used for acquiring the rotating speed of the engine and acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger according to the result that the rotating speed of the engine reaches a preset rotating speed;

a calculation module for calculating a first pressure difference between the second pressure and the first pressure;

the comparison module is used for comparing the first pressure difference with a first preset pressure difference;

and the judging module is used for primarily judging that the supercharger is blocked according to the result that the first pressure difference is smaller than the first preset pressure difference.

5. The device for detecting the jamming of the supercharger according to claim 4, wherein the receiving module is further configured to obtain an air flow rate, and obtain a third pressure at the outlet of the air filter and a fourth pressure at the outlet of the supercharger according to the result that the air flow rate reaches a preset flow rate;

the calculation module is further configured to calculate a second pressure difference between the fourth pressure and the third pressure;

the comparison module is also used for comparing the second pressure difference with a second preset pressure difference;

the judging module is further used for judging whether the supercharger is blocked again according to the result that the second pressure difference is smaller than the second preset pressure difference.

6. The device for detecting the jamming of the supercharger according to claim 5, wherein the device further comprises a counter for accumulating the times of the judgment module judging the jamming of the supercharger.

7. The device for detecting the jamming of the supercharger according to claim 6, further comprising a sending module for sending a fault prompt message of the jamming of the supercharger when the number of times of accumulation of the counter reaches 2.

8. An engine characterized by comprising the supercharger stagnation detection device according to any one of claims 4 to 7.

9. The engine of claim 8, further comprising a first pressure sensor mounted at an air filter outlet.

10. An engine according to claim 8 or 9, further comprising a second pressure sensor mounted at the supercharger outlet.

Technical Field

The invention belongs to the technical field of engines, and particularly relates to a supercharger clamping stagnation detection method, a supercharger clamping stagnation detection device and an engine.

Background

Supercharger jamming is a form of damage to the supercharger of an engine, and specifically means that the impeller of the supercharger cannot rotate, thereby causing the supercharger to fail to perform the supercharging function. Because the supercharger of the engine is difficult to disassemble and inspect, when the engine has problems, the supercharger is generally not suspected first, and therefore, the blockage of the supercharger is one of engine faults with certain concealment. In the related art, there is no method that can effectively determine the jamming of the supercharger.

Disclosure of Invention

The invention aims to at least solve the problem that no method capable of effectively judging whether the supercharger is blocked exists at present. The purpose is realized by the following technical scheme:

the invention provides a method for detecting supercharger jamming, which comprises the following steps:

acquiring the rotating speed of an engine;

according to the result that the rotating speed of the engine reaches a preset rotating speed, acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger, and calculating a first pressure difference between the second pressure and the first pressure;

comparing the first pressure difference with a first preset pressure difference;

and according to the result that the first pressure difference is smaller than the first preset pressure difference, the supercharger is judged to be blocked for the first time.

According to the method for detecting the jamming of the supercharger, provided by the embodiment of the invention, the first pressure difference is obtained according to the first pressure at the outlet of the air filter and the second pressure at the outlet of the supercharger, the first pressure difference is compared with the first preset pressure difference, and the jamming of the supercharger can be determined under the condition that the first pressure difference is smaller than the first preset pressure difference, so that the method for effectively judging the jamming of the supercharger is provided.

In some embodiments of the invention, the detection method further comprises:

acquiring air flow;

according to the result that the air flow reaches a preset flow, acquiring a third pressure at the outlet of the air filter and a fourth pressure at the outlet of the supercharger, and calculating a second pressure difference between the fourth pressure and the third pressure, wherein the preset flow is larger than the air flow when the engine speed reaches a preset speed;

comparing the second pressure difference with a second preset pressure difference;

and judging the clamping stagnation of the supercharger again according to the result that the second pressure difference is smaller than the second preset pressure difference.

In some embodiments of the invention, the detection method further comprises: and accumulating and judging the times of the jamming of the supercharger, and sending fault prompt information of the jamming of the supercharger when the times reach 2.

A second aspect of the present invention provides a device for detecting supercharger jamming, including:

the receiving module is used for acquiring the rotating speed of the engine and acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger according to the result that the rotating speed of the engine reaches a preset rotating speed;

a calculation module for calculating a first pressure difference between the second pressure and the first pressure;

the comparison module is used for comparing the first pressure difference with a first preset pressure difference;

and the judging module is used for primarily judging that the supercharger is blocked according to the result that the first pressure difference is smaller than the first preset pressure difference.

In some embodiments of the invention, the receiving module is further configured to obtain an air flow rate, and obtain a third pressure at an outlet of the air filter and a fourth pressure at an outlet of the supercharger according to a result of the air flow rate reaching a preset flow rate;

the calculation module is further configured to calculate a second pressure difference between the fourth pressure and the third pressure;

the comparison module is also used for comparing the second pressure difference with a second preset pressure difference;

the judging module is further used for judging whether the supercharger is blocked again according to the result that the second pressure difference is smaller than the second preset pressure difference.

In some embodiments of the present invention, the detection device further includes a counter, and the counter is configured to count the number of times that the determining module determines that the supercharger is jammed.

In some embodiments of the present invention, the detection apparatus further includes a sending module, configured to send a fault notification message that the supercharger is stuck when the number of times of accumulation of the counter reaches 2.

A third aspect of the present invention provides an engine including the supercharger stagnation detection apparatus in any one of the above embodiments.

In some embodiments of the invention, the engine further comprises a first pressure sensor mounted at the air filter outlet.

In some embodiments of the invention, the engine further comprises a second pressure sensor mounted at the supercharger outlet.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 is a flow chart of a method of detecting supercharger stuck according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a supercharger jamming detection apparatus according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, an embodiment of the first aspect of the present invention provides a method for detecting turbocharger jamming, where the method includes the following steps:

step 101: acquiring the rotating speed of an engine;

step 102: according to the result that the rotating speed of the engine reaches a preset rotating speed, acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger, and calculating a first pressure difference between the second pressure and the first pressure;

step 103: comparing the first pressure difference with a first preset pressure difference;

step 104: and according to the result that the first pressure difference is smaller than the first preset pressure difference, the supercharger is judged to be blocked for the first time.

According to the method for detecting the jamming of the supercharger, provided by the embodiment of the invention, the first pressure difference is obtained according to the first pressure at the outlet of the air filter and the second pressure at the outlet of the supercharger, the first pressure difference is compared with the first preset pressure difference, and the jamming of the supercharger can be determined under the condition that the first pressure difference is smaller than the first preset pressure difference, so that the method for effectively judging the jamming of the supercharger is provided.

When the supercharger is blocked, the impeller of the supercharger can not rotate, so that the supercharger can not play a role in supercharging, air can be hindered by the impeller when passing through the supercharger, so that the air pressure at the outlet of the supercharger can be reduced, and the larger the air flow is, the more obvious the blocking effect of the impeller is. Therefore, by comparing the pressure at the outlet of the supercharger with the pressure at the outlet of the air filter, whether the pressure of the supercharger stops or not can be quickly positioned, and whether the supercharger is blocked or not is judged.

It is understood that the first preset pressure can be flexibly set according to the type and model of the supercharger, and the specific value is not limited by the invention.

In some embodiments of the invention, the first pressure may be obtained by a pressure sensor disposed at an outlet of the air cleaner.

In other embodiments of the present invention, the pressure drop of the air filter may be checked according to the air flow when the engine speed reaches the preset speed, and the first pressure may be obtained by adding the atmospheric pressure to the pressure drop.

In some embodiments of the invention, the second pressure may be obtained by a pressure sensor disposed at the outlet of the supercharger.

In other embodiments of the present invention, the pressure drop of the intercooler or the like may also be checked according to the air flow when the engine speed reaches the preset speed, and the second pressure at the outlet of the supercharger may be obtained by adding the pressure drop to the supercharger sensor.

In some embodiments of the invention, the detection method further comprises the steps of:

step 105: acquiring air flow;

step 106: according to the result that the air flow reaches a preset flow, acquiring a third pressure at the outlet of the air filter and a fourth pressure at the outlet of the supercharger, and calculating a second pressure difference between the fourth pressure and the third pressure, wherein the preset flow is larger than the air flow when the engine speed reaches a preset speed;

step 107: comparing the second pressure difference with a second preset pressure difference;

step 108: and judging the clamping stagnation of the supercharger again according to the result that the second pressure difference is smaller than the second preset pressure difference.

In this embodiment, a process of performing secondary judgment on the jamming of the supercharger is added, so that the accuracy of judgment can be increased, and the occurrence of misjudgment is avoided.

It is understood that the second preset pressure can be flexibly set according to the type and model of the supercharger, and the specific value is not limited by the invention.

In some embodiments of the invention, the detection method further comprises: and accumulating and judging the times of the jamming of the supercharger, and sending fault prompt information of the jamming of the supercharger when the times reach 2.

In this embodiment, after the engine is started, whether the supercharger is jammed or not is detected twice, if the two detection results indicate that the supercharger is jammed, fault prompt information of the jamming of the supercharger is sent, and specifically, an alarm can be given to a driver in the form of characters, light, sound and the like, so that the driver can timely send the engine for repair.

An embodiment of the second aspect of the present invention provides a device 100 for detecting supercharger jamming, wherein the device 100 comprises:

the receiving module 10 is used for acquiring the rotating speed of the engine and acquiring a first pressure at an outlet of an air filter of the engine and a second pressure at an outlet of a supercharger according to the result that the rotating speed of the engine reaches a preset rotating speed;

a calculation module 20 for calculating a first pressure difference between the second pressure and the first pressure;

a comparison module 30 for comparing the first pressure difference with a first preset pressure difference;

and the judging module 40 is used for primarily judging that the supercharger is blocked according to the result that the first pressure difference is smaller than the first preset pressure difference.

In some embodiments of the invention, the receiving module is further configured to obtain an air flow rate, and obtain a third pressure at an outlet of the air filter and a fourth pressure at an outlet of the supercharger according to a result of the air flow rate reaching a preset flow rate; the calculation module is further configured to calculate a second pressure difference between the fourth pressure and the third pressure; the comparison module is also used for comparing the second pressure difference with a second preset pressure difference; the judging module is further used for judging whether the supercharger is blocked again according to the result that the second pressure difference is smaller than the second preset pressure difference.

In some embodiments of the present invention, the detecting device further includes a counter 50, and the counter 50 is configured to count the number of times that the determining module 40 determines that the supercharger is jammed.

In some embodiments of the present invention, the detection apparatus further includes a sending module 60, configured to send a failure notification message indicating that the supercharger is stuck when the number of times of accumulation of the counter 50 reaches 2.

An embodiment of the third aspect of the invention provides an engine including the supercharger jam detection apparatus in any one of the embodiments described above.

In some embodiments of the invention, the engine further comprises a first pressure sensor mounted at the air filter outlet.

In some embodiments of the invention, the engine further comprises a second pressure sensor mounted at the supercharger outlet.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.