CN114607518A - Electrical pressure regulating valve failure detection method and vehicle - Google Patents
Electrical pressure regulating valve failure detection method and vehicle Download PDFInfo
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- CN114607518A CN114607518A CN202210285538.6A CN202210285538A CN114607518A CN 114607518 A CN114607518 A CN 114607518A CN 202210285538 A CN202210285538 A CN 202210285538A CN 114607518 A CN114607518 A CN 114607518A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to the field of vehicles and discloses a method for detecting failure of an electrical pressure regulating valve and a vehicle, wherein the method for detecting failure of the electrical pressure regulating valve comprises the following steps: acquiring the actual pressure of an intake manifold, and determining whether the actual pressure of the intake manifold meets the requirement or not based on the magnitude relation between the actual pressure of the intake manifold and the preset pressure of the intake manifold; and if the actual pressure of the intake manifold does not meet the requirement, acquiring the actual valve back pressure of the electric pressure regulating valve, and determining whether the electric pressure regulating valve fails or not based on the magnitude relation between the actual valve back pressure of the electric pressure regulating valve and the preset valve back pressure. According to the failure detection method for the electrical pressure regulating valve, when the pressure in the air inlet manifold does not meet the requirement, whether the electrical pressure regulating valve fails or not is determined by judging the pressure behind the electrical pressure regulating valve, so that the electrical pressure regulating valve can be maintained by timely alarming when the electrical pressure regulating valve fails.
Description
Technical Field
The invention relates to the field of vehicles, in particular to an electrical pressure regulating valve failure detection method and a vehicle.
Background
The turbocharger is one of important parts of an engine air inlet system and comprises a turbine and a compressor connected with the turbine through a turbine shaft, high-temperature waste gas discharged by the engine enters the turbine and then drives the turbine to rotate, the turbine shaft drives an impeller in the compressor to rotate at a high speed so as to pressurize air, and the pressurized air enters the engine to participate in combustion.
The turbocharger is provided with a release valve for protecting the supercharger, when the rotating speed of the turbocharger exceeds a specified rotating speed, the pressure in the compressor is overlarge, the release valve is opened at the moment, and partial waste gas directly enters the exhaust tail pipe without passing through the turbine so that the rotating speed of the supercharger is reduced.
In order to realize accurate adjustment of the opening degree of the air release valve, the air release valve is provided with an electric pressure regulating valve which is used for providing pressure to drive a valve core of the air release valve to act, an air inlet end of the electric pressure regulating valve is connected with an air source such as an air tank on a vehicle, and the opening degree adjustment of the air release valve is realized by adjusting the opening degree adjustment of the electric pressure regulating valve.
Once the electric pressure regulating valve fails, such as air leakage, clamping stagnation and other faults, the opening and closing of the air release valve can be directly affected, and therefore a method for detecting the failure of the electric pressure regulating valve is urgently needed to solve the technical problems.
Disclosure of Invention
The invention aims to provide a failure detection method for an electrical pressure regulating valve and a vehicle, which can accurately confirm whether the electrical pressure regulating valve fails or not in time.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for detecting failure of an electrical pressure regulating valve comprises the following steps:
acquiring the actual pressure of an intake manifold, and determining whether the actual pressure of the intake manifold meets the requirement or not based on the magnitude relation between the actual pressure of the intake manifold and the preset pressure of the intake manifold;
and if the actual pressure of the intake manifold does not meet the requirement, acquiring the actual valve back pressure of the electric pressure regulating valve, and determining whether the electric pressure regulating valve fails or not based on the magnitude relation between the actual valve back pressure of the electric pressure regulating valve and the preset valve back pressure.
As an optional technical solution of the method for detecting failure of an electrical pressure regulating valve, determining whether an actual pressure of an intake manifold meets a requirement based on a magnitude relationship between the actual pressure of the intake manifold and a preset intake manifold pressure includes:
when the intake manifold pressure is not equal to the preset intake manifold pressure, the actual pressure of the intake manifold is not satisfactory.
As an optional technical solution of the method for detecting failure of an electrical pressure regulating valve, the preset intake manifold pressure is obtained according to the following steps:
the method comprises the steps of obtaining actual fuel injection quantity of an engine and actual rotating speed of the engine, inquiring pressure of an intake manifold corresponding to the actual fuel injection quantity of the engine and the actual rotating speed of the engine based on corresponding relation among the fuel injection quantity of the engine, the rotating speed of the engine and the pressure of the intake manifold, and taking the inquired pressure of the intake manifold as preset pressure of the intake manifold.
As an optional technical solution of the method for detecting a failure of an electrical pressure regulating valve, determining whether the electrical pressure regulating valve fails based on a magnitude relationship between an actual valve back pressure and a preset valve back pressure of the electrical pressure regulating valve includes:
and when the actual valve back pressure of the electric pressure regulating valve is not equal to the preset valve back pressure, the electric pressure regulating valve fails.
As an optional technical scheme of the failure detection method of the electrical pressure regulating valve, the working condition of the engine comprises a closing working condition of a gas release valve and an opening working condition of the gas release valve;
the preset valve back pressure is obtained according to the following steps:
and determining the current working condition of the engine, and if the engine is in the closed working condition of the air release valve, presetting the pressure behind the valve to be zero.
As an optional technical solution of the method for detecting failure of an electrical pressure regulating valve, when determining a current working condition of the engine, if the engine is in a purge valve opening working condition, obtaining an actual opening degree of the electrical pressure regulating valve, querying a valve back pressure corresponding to an actual switch of the electrical pressure regulating valve based on a corresponding relationship between the opening degree of the electrical pressure regulating valve and the valve back pressure of the electrical pressure regulating valve, and taking the queried valve back pressure as a preset valve back pressure.
As an optional technical solution of the above method for detecting failure of an electrical pressure regulating valve, the current operating condition of the engine is determined according to the following steps:
acquiring actual fuel injection quantity of an engine and actual rotating speed of the engine;
and inquiring the working condition of the engine corresponding to the actual fuel injection quantity and the actual rotating speed of the engine based on the corresponding relation among the fuel injection quantity of the engine, the rotating speed of the engine and the working condition of the engine, and taking the inquired working condition of the engine as the current working condition of the engine.
As an optional technical solution of the method for detecting a failure of an electrical pressure regulating valve, before determining whether the electrical pressure regulating valve fails based on a magnitude relationship between an actual valve back pressure and a preset valve back pressure of the electrical pressure regulating valve, determining whether an opening degree of the electrical pressure regulating valve meets a requirement based on a magnitude relationship between an actual opening degree of the electrical pressure regulating valve and a preset opening degree of the electrical pressure regulating valve;
and if the opening degree of the electric pressure regulating valve meets the requirement, determining whether the electric pressure regulating valve fails or not based on the magnitude relation between the actual valve back pressure and the preset valve back pressure of the electric pressure regulating valve.
As an optional technical scheme of the method for detecting the failure of the electric pressure regulating valve, when the failure of the electric pressure regulating valve is determined, an alarm is given.
The invention further provides a vehicle, and the failure detection method of the electric pressure regulating valve adopting any scheme is adopted.
The invention has the beneficial effects that: according to the failure detection method for the electrical pressure regulating valve, when the pressure in the air inlet manifold does not meet the requirement, whether the electrical pressure regulating valve fails or not is determined by judging the pressure behind the electrical pressure regulating valve, so that the electrical pressure regulating valve can be maintained by timely alarming when the electrical pressure regulating valve fails.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic diagram of an engine boosting system provided by an embodiment of the present invention;
FIG. 2 is a main flowchart of a method for detecting failure of an electrical pressure regulating valve according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pressure output characteristic of an electrical pressure regulating valve according to an embodiment of the present invention;
FIG. 4 is a characteristic diagram of an engine provided by an embodiment of the present invention;
fig. 5 is a detailed flowchart of a method for detecting failure of an electrical pressure regulating valve according to an embodiment of the present invention.
In the figure:
1. a turbine; 2. a compressor; 3. a bypass line; 4. a deflation valve; 5. an electrical pressure regulating valve; 6. a gas source; 7. an engine controller; 8. a pressure detection unit.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the features relevant to the present invention are shown in the drawings.
As shown in fig. 1, an engine and an engine supercharging system are arranged on a vehicle, the engine supercharging system includes a turbine 1, a compressor 2 and a bypass pipeline 3, wherein the turbine 1 and the compressor 2 are connected through a turbine shaft to form a turbocharger, the compressor 2 is arranged on an air inlet pipeline of the engine, the turbine 1 is arranged on an air outlet pipeline of the engine, a turbine of the turbine 1 can rotate at a high speed under the action of exhaust gas discharged by the engine, and the turbine drives the compressor 2 to work through the turbine shaft, so that air in the air inlet pipeline is supercharged.
Two ends of the bypass pipeline 3 are respectively communicated with the air inlet end and the air outlet end of the turbine 1, the bypass pipeline 3 is provided with a release valve 4, when the release valve 4 is opened, part of waste gas does not pass through the turbine 1, but enters the air outlet end of the turbine 1 from the air inlet end of the turbine 1 through the bypass pipeline 3.
The air release valve 4 is provided with an electric pressure regulating valve 5, the air inlet end of the electric pressure regulating valve 5 is connected with an air source 6, such as an air storage tank on a vehicle, and the air outlet end of the electric pressure regulating valve 5 is connected with the pilot end of the air release valve 4. The opening of the air release valve 4 is adjusted by adjusting the opening of the electric pressure regulating valve 5. The electric pressure regulating valve 5 is communicated with an engine controller 7, a corresponding relation among the engine rotating speed, the engine oil injection quantity and the opening degree of the electric pressure regulating valve 5, such as a map, is established in advance, the electric pressure regulating valve is embedded into the engine controller 7, the opening degree of the electric pressure regulating valve 5 corresponding to the actual rotating speed of the engine and the actual oil injection quantity of the engine is inquired based on the corresponding relation among the engine rotating speed, the engine oil injection quantity and the opening degree of the electric pressure regulating valve 5, and the opening degree of the electric pressure regulating valve 5 is regulated according to the inquired opening degree of the electric pressure regulating valve 5, so that the purpose of regulating the pressure behind the electric pressure regulating valve 5 is achieved. The electric pressure regulating valve 5 has different post-valve pressures and different opening degrees of the purge valve 4.
As shown in fig. 2, the present embodiment provides a method for detecting a failure of an electrical pressure regulating valve, including the following steps:
s1, acquiring the actual pressure of the intake manifold, and determining whether the actual pressure of the intake manifold meets the requirement or not based on the magnitude relation between the actual pressure of the intake manifold and the preset pressure of the intake manifold;
and S2, if the actual pressure of the intake manifold does not meet the requirement, acquiring the actual valve back pressure of the electric pressure regulating valve 5, and determining whether the electric pressure regulating valve 5 fails or not based on the magnitude relation between the actual valve back pressure of the electric pressure regulating valve 5 and the preset valve back pressure.
The purpose of supercharging the engine supercharging system is to boost the pressure in the intake manifold to the required pressure. If the pressure in the intake manifold is not satisfactory, it may be that the electrical regulator valve 5 fails, or that other faults cause the electrical regulator valve 5 to fail. When the pressure of the intake manifold does not meet the requirement, whether the electric pressure regulating valve 5 fails or not is determined by judging the pressure behind the electric pressure regulating valve 5. If the electrical pressure regulating valve 5 does not fail, other components of the engine supercharging system fail.
In order to measure the post-valve pressure of the electrical pressure regulating valve 5, a pressure detection unit 8 is provided at the outlet end of the electrical pressure regulating valve 5. Illustratively, the pressure detection unit 8 is a pressure sensor.
Alternatively, determining whether the actual pressure of the intake manifold is satisfactory based on a magnitude relationship between the actual pressure of the intake manifold and a preset intake manifold pressure comprises the steps of: when the intake manifold pressure is equal to the preset intake manifold pressure, the actual pressure of the intake manifold meets the requirement. When the intake manifold pressure is not equal to the preset intake manifold pressure, the intake manifold pressure is not satisfactory. In other embodiments, considering the existence of the error, determining whether the actual pressure of the intake manifold meets the requirement based on the magnitude relation between the actual pressure of the intake manifold and the preset intake manifold pressure comprises the following steps: and acquiring the difference value of the pressure of the intake manifold and the preset pressure of the intake manifold, and when the absolute value of the difference value is larger than the set pressure difference value of the intake manifold, considering that the pressure of the intake manifold is not qualified.
The preset intake manifold pressure is related to the engine speed and the engine fuel injection quantity, a correspondence relationship, such as a map, between the engine fuel injection quantity, the engine speed, and the intake manifold pressure is established in advance, and the correspondence relationship is embedded into the engine controller 7. The preset intake manifold pressure is obtained according to the following steps: the method comprises the steps of obtaining actual fuel injection quantity of an engine and actual rotating speed of the engine, inquiring pressure of an intake manifold corresponding to the actual fuel injection quantity of the engine and the actual rotating speed of the engine based on corresponding relation among the fuel injection quantity of the engine, the rotating speed of the engine and the pressure of the intake manifold, and taking the inquired pressure of the intake manifold as preset pressure of the intake manifold.
Alternatively, determining whether the electric pressure regulating valve 5 is failed based on a magnitude relation between an actual valve back pressure and a preset valve back pressure of the electric pressure regulating valve 5 includes the steps of: when the actual valve back pressure of the electrical pressure regulating valve 5 is not equal to the preset valve back pressure, the electrical pressure regulating valve 5 fails. When the actual valve back pressure of the electric pressure regulating valve 5 is equal to the preset valve back pressure, the electric pressure regulating valve 5 does not fail, and the actual pressure of the intake manifold is not satisfactory due to the failure of other components of the engine supercharging system. In other embodiments, the determining whether the electric pressure regulating valve 5 is failed based on the magnitude relationship between the actual valve back pressure and the preset valve back pressure of the electric pressure regulating valve 5 in consideration of the existence of the error includes the steps of: the difference value between the actual valve back pressure of the electric pressure regulating valve 5 and the preset valve back pressure is obtained, and when the absolute value of the difference value is larger than the set valve back pressure difference value, the electric pressure regulating valve 5 is considered to be invalid.
The preset valve back pressure is related to the working condition of the engine, and the working condition of the engine is divided into a deflation valve closing working condition and a deflation valve opening working condition according to the opening and closing of the deflation valve 4. When the engine is in the closed working condition of the air release valve, the preset valve back pressure of the electric pressure regulating valve 5 is zero. When the engine is in the open working condition of the air bleeding valve, the magnitude of the preset valve back pressure is related to the opening degree of the electric pressure regulating valve 5, the corresponding relation between the opening degree of the electric pressure regulating valve 5 and the valve back pressure of the electric pressure regulating valve 5 is established in advance, and the corresponding relation is embedded into the engine controller 7. When the engine is in the open working condition of the bleeder valve, the preset valve back pressure is obtained according to the following steps: the actual opening degree of the electric pressure regulating valve 5 is acquired, the post-valve pressure corresponding to the actual opening degree of the electric pressure regulating valve 5 is queried based on the correspondence between the opening degree of the electric pressure regulating valve 5 and the post-valve pressure of the electric pressure regulating valve 5, and the queried post-valve pressure is taken as the preset post-valve pressure.
Illustratively, as shown in the pressure output characteristic diagram of the electrical pressure regulating valve 5 shown in fig. 3, the opening degree of the electrical pressure regulating valve 5 and the post-valve pressure of the electrical pressure regulating valve 5 are in a linear relationship. As shown in fig. 3, the minimum opening degree of the electrical pressure-regulating valve 5 is r (a), and the post-valve pressure of the corresponding electrical pressure-regulating valve 5 is p (a); the maximum opening degree of the electric pressure regulating valve 5 is r (b), and the post-valve pressure of the corresponding electric pressure regulating valve 5 is p (b). When an electric pressure-regulating valve 5 is at any opening r, the post-valve pressure p (r) of the corresponding electric pressure-regulating valve 5 is [ ([ r-r (a) ] × p (b)/[ r (b) -r (a)) ].
The engine working condition is related to the engine fuel injection quantity and the engine rotating speed, the corresponding relation among the engine fuel injection quantity, the engine rotating speed and the engine working condition is established in advance, and the engine working condition is embedded into an engine controller 7. The current operating condition of the engine is determined according to the following steps: acquiring actual fuel injection quantity of an engine and actual rotating speed of the engine; and inquiring the working condition of the engine corresponding to the actual fuel injection quantity and the actual rotating speed of the engine based on the corresponding relation among the fuel injection quantity of the engine, the rotating speed of the engine and the working condition of the engine, and taking the inquired working condition of the engine as the current working condition of the engine.
For example, as shown in the engine universal characteristic diagram of fig. 4, the air bleeding area of the air bleeding valve 4 is divided into two areas, namely an area a and an area B, according to the engine speed and the engine torque, and the fuel injection quantity of the engine can be calculated according to the engine torque, so as to obtain the corresponding relation between the engine speed, the fuel injection quantity and the engine working condition, wherein the area a corresponds to the closed working condition of the air bleeding valve, and the area B corresponds to the open working condition of the air bleeding valve. It is not described herein in detail as to how the engine fuel injection amount is calculated from the engine torque, which is the prior art in the field.
When the engine is in the air release valve closing working condition, the air release valve 4 is closed under the condition that the electric pressure regulating valve 5 is not invalid, the actual opening degree of the electric pressure regulating valve 5 is equal to zero, and the actual valve back pressure of the electric pressure regulating valve 5 is equal to zero.
Alternatively, when the engine controller 7 fails to adjust the electrical pressure regulating valve 5 to the corresponding opening degree due to a communication failure or the like, the post-valve pressure of the electrical pressure regulating valve 5 may be unsatisfactory, and the electrical pressure regulating valve 5 itself may not have a problem. For this purpose, before determining whether the electrical pressure-regulating valve 5 is failed based on the magnitude relationship between the actual valve back pressure and the preset valve back pressure of the electrical pressure-regulating valve 5, determining whether the opening degree of the electrical pressure-regulating valve 5 meets the requirement based on the magnitude relationship between the actual opening degree of the electrical pressure-regulating valve 5 and the preset opening degree of the electrical pressure-regulating valve 5; if the opening degree of the electric pressure regulating valve 5 meets the requirement, whether the electric pressure regulating valve 5 fails or not is determined based on the magnitude relation between the actual valve back pressure and the preset valve back pressure of the electric pressure regulating valve 5.
Determining whether the opening degree of the electric pressure regulating valve 5 meets the requirement or not based on the magnitude relation between the actual opening degree of the electric pressure regulating valve 5 and the preset opening degree of the electric pressure regulating valve 5, and the method comprises the following steps: when the actual opening degree of the electric pressure regulating valve 5 is equal to the preset opening degree of the electric pressure regulating valve 5, the opening degree of the electric pressure regulating valve 5 meets the requirement; when the actual opening degree of the electrical pressure regulating valve 5 is not equal to the preset opening degree of the electrical pressure regulating valve 5, the opening degree of the electrical pressure regulating valve 5 is not satisfactory. In other embodiments, the determining whether the opening degree of the electric pressure regulating valve 5 meets the requirement based on the magnitude relation between the actual opening degree of the electric pressure regulating valve 5 and the preset opening degree of the electric pressure regulating valve 5 in consideration of the existence of the error comprises the following steps: and acquiring the difference value between the actual opening degree of the electric pressure regulating valve 5 and the preset opening degree of the electric pressure regulating valve 5, wherein when the difference value is larger than the set opening degree difference value, the opening degree of the electric pressure regulating valve 5 does not meet the requirement.
When the opening degree of the electrical pressure regulating valve 5 does not meet the requirement, it is determined that the electrical pressure regulating valve 5 fails, and the electrical pressure regulating valve 5 may fail, or the electrical pressure regulating valve 5 may fail to adjust to the corresponding opening degree due to a communication failure or the like.
The preset opening degree of the electric pressure regulating valve 5 is obtained according to the following steps: the method comprises the steps of acquiring the actual rotating speed of the engine and the actual oil injection quantity of the engine, inquiring the opening degree of the electric pressure regulating valve 5 corresponding to the actual rotating speed of the engine and the actual oil injection quantity of the engine based on the opening degree of the electric pressure regulating valve 5, a corresponding relation between the rotating speed of the engine and the oil injection quantity of the engine, such as a map and the like, and using the inquired opening degree of the electric pressure regulating valve 5 as the preset opening degree of the electric pressure regulating valve 5.
When the actual pressure of the intake manifold does not meet the requirement and the opening degree of the electric pressure regulating valve 5 meets the requirement, if the actual valve back pressure of the electric pressure regulating valve 5 is equal to the preset valve back pressure, the electric pressure regulating valve 5 does not fail. If the actual valve back pressure of the electrical pressure regulating valve 5 is not equal to the preset valve back pressure, the electrical pressure regulating valve 5 fails.
Optionally, upon determining that the electrical pressure regulating valve 5 is failed, an alarm is given in order to timely repair the electrical pressure regulating valve 5. Specifically, the vehicle is provided with an alarm module, such as a prompting lamp, an audible alarm and the like.
Fig. 5 shows a detailed flowchart of the method for detecting the failure of the electric pressure regulating valve, as shown in fig. 5, the method for detecting the failure of the electric pressure regulating valve comprises the following steps:
s10, judging whether the actual pressure of the intake manifold is equal to the preset intake manifold pressure or not in the normal working process of the engine; if yes, the electric pressure regulating valve 5 does not fail; if not, S20 is executed.
To improve the accuracy of the determination, S20 is executed again when the actual pressure of the intake manifold is not equal to the preset intake manifold pressure for the first preset time.
S20, determining whether the actual opening of the electric pressure regulating valve 5 is equal to a preset opening; if yes, go to S30; if not, the electric pressure regulating valve 5 is invalid.
In order to improve the accuracy of the determination, S30 is executed when the actual opening degree of the electric pressure regulating valve 5 is not equal to the preset opening degree for the second preset time.
S30, judging whether the post-valve pressure of the electric pressure regulating valve 5 is equal to a preset post-valve pressure or not, if so, judging that the electric pressure regulating valve 5 does not fail; if so, the electrical pressure regulating valve 5 fails.
In order to improve the accuracy of the determination, when the post-valve pressure of the electrical pressure-regulating valve 5 is not equal to the preset post-valve pressure for a third preset time, it is determined that the electrical pressure-regulating valve 5 is failed.
The embodiment also provides a vehicle adopting the method for detecting the failure of the electric pressure regulating valve.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (10)
1. A method for detecting failure of an electrical pressure regulating valve is characterized by comprising the following steps:
acquiring the actual pressure of an intake manifold, and determining whether the actual pressure of the intake manifold meets the requirement or not based on the magnitude relation between the actual pressure of the intake manifold and the preset pressure of the intake manifold;
and if the actual pressure of the intake manifold does not meet the requirement, acquiring the actual valve back pressure of the electric pressure regulating valve (5), and determining whether the electric pressure regulating valve (5) fails or not based on the magnitude relation between the actual valve back pressure of the electric pressure regulating valve (5) and the preset valve back pressure.
2. The method for detecting failure of an electrical pressure regulating valve according to claim 1, wherein determining whether the actual pressure of the intake manifold meets the requirement based on a magnitude relationship between the actual pressure of the intake manifold and a preset intake manifold pressure comprises:
when the intake manifold pressure is not equal to the preset intake manifold pressure, the actual pressure of the intake manifold is not satisfactory.
3. The method of detecting failure of an electrical pressure regulating valve according to claim 1, wherein said preset intake manifold pressure is obtained by the steps of:
the method comprises the steps of obtaining actual fuel injection quantity of an engine and actual rotating speed of the engine, inquiring pressure of an intake manifold corresponding to the actual fuel injection quantity of the engine and the actual rotating speed of the engine based on corresponding relation among the fuel injection quantity of the engine, the rotating speed of the engine and the pressure of the intake manifold, and taking the inquired pressure of the intake manifold as preset pressure of the intake manifold.
4. The electrical pressure regulating valve failure detection method according to claim 1, wherein determining whether the electrical pressure regulating valve (5) is failed based on a magnitude relationship between an actual valve back pressure and a preset valve back pressure of the electrical pressure regulating valve (5) includes:
when the actual valve back pressure of the electric pressure regulating valve (5) is not equal to the preset valve back pressure, the electric pressure regulating valve (5) fails.
5. The method for detecting the failure of the electrical pressure regulating valve according to claim 1, wherein the working conditions of the engine comprise a closing working condition of a gas release valve and an opening working condition of the gas release valve;
the preset valve back pressure is obtained according to the following steps:
and determining the current working condition of the engine, and if the engine is in the closed working condition of the air release valve, presetting the pressure behind the valve to be zero.
6. The method for detecting the failure of the electrical pressure regulating valve according to claim 5, characterized in that when the current working condition of the engine is determined, if the engine is in a deflation valve opening working condition, the actual opening degree of the electrical pressure regulating valve (5) is obtained, the valve back pressure corresponding to the actual switch of the electrical pressure regulating valve (5) is inquired based on the corresponding relation between the opening degree of the electrical pressure regulating valve (5) and the valve back pressure of the electrical pressure regulating valve (5), and the inquired valve back pressure is used as the preset valve back pressure.
7. The method of detecting failure of an electrical pressure regulating valve according to claim 6, wherein the current operating condition of the engine is determined according to the steps of:
acquiring actual fuel injection quantity of an engine and actual rotating speed of the engine;
and inquiring the working condition of the engine corresponding to the actual fuel injection quantity and the actual rotating speed of the engine based on the corresponding relation among the fuel injection quantity of the engine, the rotating speed of the engine and the working condition of the engine, and taking the inquired working condition of the engine as the current working condition of the engine.
8. The electrical pressure regulating valve failure detection method according to any one of claims 1 to 7, characterized by determining whether the opening degree of the electrical pressure regulating valve (5) meets a requirement based on a magnitude relation between an actual opening degree of the electrical pressure regulating valve (5) and a preset opening degree of the electrical pressure regulating valve (5) before determining whether the electrical pressure regulating valve (5) fails based on a magnitude relation between an actual valve back pressure and a preset valve back pressure of the electrical pressure regulating valve (5);
and if the opening degree of the electric pressure regulating valve (5) meets the requirement, determining whether the electric pressure regulating valve (5) fails or not based on the magnitude relation between the actual valve back pressure and the preset valve back pressure of the electric pressure regulating valve (5).
9. Method for detecting the failure of an electrical pressure regulating valve according to any of claims 1 to 7, characterized in that an alarm is given when it is determined that the electrical pressure regulating valve (5) has failed.
10. A vehicle characterized by employing the method for detecting a failure of an electric pressure-regulating valve according to any one of claims 1 to 9.
Priority Applications (1)
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