CN112412673B - Fuel system, engine and method for automatically releasing limp mode of engine - Google Patents
Fuel system, engine and method for automatically releasing limp mode of engine Download PDFInfo
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- CN112412673B CN112412673B CN202011165695.0A CN202011165695A CN112412673B CN 112412673 B CN112412673 B CN 112412673B CN 202011165695 A CN202011165695 A CN 202011165695A CN 112412673 B CN112412673 B CN 112412673B
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- Prior art keywords
- oil
- engine
- pressure
- home mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
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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
- F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention belongs to the technical field of fuel systems, and particularly relates to a fuel system, an engine and a method for automatically relieving a limp mode. The fuel oil system comprises an oil tank, an oil delivery pump, a fine filter, an oil injection pump and a common rail pipe, wherein the oil tank is communicated with an oil inlet of the oil delivery pump, an oil outlet of the oil delivery pump is communicated with an oil inlet of the fine filter, an oil inlet of the oil injection pump is communicated with an oil outlet of the fine filter, and the common rail pipe is communicated with an oil outlet of the oil injection pump. By using the fuel system in the technical scheme, when the engine works abnormally to perform limping mode, the pressure sensor can measure the pressure in real time and transmit the value to the engine ECU, so that whether the limping mode is caused by small problems of short-time fluctuation of a low-pressure oil way or a high-pressure oil way or the like is judged, and the power recovery can be realized when the pressure of the low-pressure oil way fluctuates temporarily.
Description
Technical Field
The invention belongs to the technical field of fuel systems, and particularly relates to a fuel system, an engine and a method for automatically releasing a limp mode of the engine.
Background
In the prior art, a pressure limiting valve is mechanical, cannot be automatically recovered after entering a limp home mode, and can be recovered only by stopping the machine. For some engines with special purposes or some special running conditions, the safety problem of the whole vehicle or the whole machine is caused by the power loss caused by limping. In addition, the limp mode caused by small problems of short-time fluctuation of a low-pressure oil path or a high-pressure oil path cannot be automatically recovered, and the problem of customer complaint is caused.
Disclosure of Invention
The invention aims to at least solve the problem that the limp-home mode cannot be automatically recovered due to small problems of short-time fluctuation and the like of a low-pressure oil circuit or a high-pressure oil circuit. The purpose is realized by the following technical scheme:
a first aspect of the invention provides a fuel system comprising:
an oil tank;
the oil tank is communicated with an oil inlet of the oil transfer pump;
an oil outlet of the oil delivery pump is communicated with an oil inlet of the fine filter;
an oil inlet of the oil injection pump is communicated with an oil outlet of the fine filter;
the fuel injection pump is characterized in that an electric control valve is arranged on the common rail pipe, a pressure sensor is arranged on a first oil path between the fine filter and the fuel injection pump, and the electric control valve and the pressure sensor are both connected with an engine ECU.
By using the fuel oil system in the technical scheme, when the engine is in the limp mode during abnormal work, the pressure sensor can measure the pressure in real time and transmit the value to the engine ECU so as to judge whether the limp mode is caused by small problems of short-time fluctuation of a low-pressure oil path or a high-pressure oil path and the like, and then corresponding operation is carried out through the electric control valve.
In addition, the fuel system according to the invention may also have the following additional technical features:
in some embodiments of the invention, the electrically controlled valve is an electrically controlled pressure limiting valve, which is connected to the engine ECU.
In some embodiments of the invention, a strainer is provided on the second oil path between the oil tank and the oil delivery pump.
The invention also provides an engine which is provided with the fuel system.
The invention also proposes a method for automatically deactivating a limp home mode of an engine, implemented according to the above engine, comprising:
acquiring a first pressure value of the pressure sensor after the engine runs in a limp home mode;
controlling the engine to exit a limp home mode in dependence on the first pressure value being between a first limit and a second limit.
In some embodiments of the present invention, the method further comprises controlling the electronically controlled valve to open after the engine is operating in a limp home mode.
In some embodiments of the present invention, the method for obtaining the first pressure value of the pressure sensor specifically includes:
acquiring the first pressure value of the pressure sensor after the engine runs in a limp home mode T time.
In some embodiments of the present invention, controlling the electrically controlled valve to close according to the first pressure value after the first pressure value is between the first limit value and the second limit value.
In some embodiments of the invention, the engine is controlled to continue to maintain a limp home mode in dependence on the first pressure value being outside the first and second limits.
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 schematically shows an overall structural view of a fuel system according to an embodiment of the invention;
fig. 2 schematically shows a control flow diagram of a method of automatically deactivating an engine limp home mode according to an embodiment of the invention.
10: an oil tank;
20: an oil transfer pump;
30: a fine filter;
40: an injection pump;
50: common rail pipe, 51: an electrically controlled valve;
60: a pressure sensor;
70: a coarse filter;
80: and a fuel injector.
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. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
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.
Fig. 1 schematically shows an overall structural diagram of a fuel system according to an embodiment of the present invention. The invention provides a fuel system, an engine and a method for automatically releasing a limp mode of the engine. As shown in fig. 1, the fuel system of the present invention includes an oil tank 10, an oil delivery pump 20, a fine filter 30, an oil injection pump 40 and a common rail pipe 50, wherein the oil tank 10 is communicated with an oil inlet of the oil delivery pump 20, an oil outlet of the oil delivery pump 20 is communicated with an oil inlet of the fine filter 30, an oil inlet of the oil injection pump 40 is communicated with an oil outlet of the fine filter 30, the common rail pipe 50 is communicated with an oil outlet of the oil injection pump 40, and the fuel system is characterized in that an electric control valve 51 is disposed on the common rail pipe 50, a pressure sensor 60 is disposed on a first oil path between the fine filter 30 and the oil injection pump 40, and both the electric control valve 51 and the pressure sensor 60 are connected with an engine ECU.
By using the fuel oil system in the technical scheme, when the engine is in the limp mode during abnormal work, the pressure sensor 60 can measure the pressure in real time and transmit the value to the engine ECU to judge whether the limp mode is caused by small problems of short-time fluctuation of a low-pressure oil path or a high-pressure oil path and the like, and then the electric control valve 51 is used for carrying out corresponding operation.
Further, in some embodiments of the present invention, the electronic control valve 51 is an electronic control pressure limiting valve, and the electronic control pressure limiting valve is connected to the engine ECU, and after the limp home mode starts, the electronic control pressure limiting valve can open to adjust the rail pressure in time, and meanwhile, if the limp home mode is caused by a small problem of short-time fluctuation of the low-pressure oil path or the high-pressure oil path, the engine ECU can control the electronic control pressure limiting valve to close, so that power recovery is realized, and reliability is improved.
Specifically, in some embodiments of the present invention, a strainer 70 is provided on the second oil path between the oil tank 10 and the oil transfer pump 20 to filter impurities with large particle size in the oil.
Specifically, in some embodiments of the present invention, the fuel system further includes a fuel injector 80, the fuel injector 80 being in communication with the common rail 50 for precise delivery of fuel.
The invention also provides an engine which is provided with the fuel system.
The invention also proposes a method for automatically deactivating a limp-home mode of an engine, as shown in fig. 2, implemented according to the above engine, the method comprising:
acquiring a first pressure value of the pressure sensor 60 after the engine operates in the limp-home mode;
and controlling the engine to exit the limp home mode according to the first pressure value being between the first limit value and the second limit value.
Specifically, after the engine operates in the limp-home mode, the first pressure value of the pressure sensor 60 is obtained and transmitted to the engine ECU for comparison with the limit value, and if the first pressure value is within the normal range of the first limit value and the second limit value (that is, in the limp-home mode, the fuel system is controlled by the engine ECU to exit the limp-home mode due to small problems such as short fluctuation of a low-pressure oil circuit or a high-pressure oil circuit), so that power recovery is realized, and reliability is improved.
Further, in some embodiments of the present invention, the operation of the electronic control valve 51 in the limp-home mode is controlled to perform an opening operation, so that the rail pressure is adjusted by the electronic control valve 51 to ensure the stability of the fuel system.
Specifically, in some embodiments of the present invention, the method of acquiring the first pressure value of the pressure sensor 60 specifically includes:
after the engine operates in the limp home mode for time T, a first pressure value of the pressure sensor 60 is obtained. Since the pressure fluctuation occurs in a short time, the first pressure value of the pressure sensor 60 is obtained after the limp home mode T is operated, so that the pressure value can be more accurately determined, and the stability and the reliability are improved. The T time in the present embodiment is not particularly limited, and is specifically analyzed and set in a specific case.
Specifically, in some embodiments of the present invention, the controlling the electronically controlled valve 51 to close after the first pressure value is between the first limit and the second limit further includes, so as to enable the engine to exit the limp home mode, enable the power to be recovered without restarting the machine, and improve reliability.
Further, in some embodiments of the present invention, the engine is controlled to continue to maintain the limp home mode according to the fact that the first pressure value is outside the first limit value and the second limit value, that is, the limp home mode is not caused by small problems such as short-time fluctuation of the low-pressure oil path or the high-pressure oil path, and safety is improved.
Specifically, in some embodiments of the present invention, the engine ECU records the number of times the engine exits the limp home mode for subsequent troubleshooting related issues for analysis.
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 claims.
Claims (5)
1. A method of automatically deactivating an engine limp home mode, the method being implemented in accordance with a fuel system, wherein the fuel system comprises:
an oil tank;
the oil tank is communicated with an oil inlet of the oil transfer pump;
an oil outlet of the oil delivery pump is communicated with an oil inlet of the fine filter;
an oil inlet of the oil injection pump is communicated with an oil outlet of the fine filter;
the common rail pipe is communicated with an oil outlet of the oil injection pump, an electric control valve is arranged on the common rail pipe, a pressure sensor is arranged on a first oil path between the fine filter and the oil injection pump, and the electric control valve and the pressure sensor are both connected with an engine ECU (electronic control Unit);
the method comprises the following steps:
obtaining a first pressure value of a pressure sensor after the engine operates in a limp-home mode;
controlling the engine to exit a limp home mode in dependence on the first pressure value being between a first limit and a second limit.
2. The method for automatically deactivating an engine limp home mode of claim 1, further comprising controlling an electronically controlled valve to open after said engine is operating in a limp home mode.
3. The method for automatically deactivating an engine limp home mode as defined in claim 1, wherein the method of obtaining a first pressure value of the pressure sensor comprises:
acquiring the first pressure value of the pressure sensor after the engine runs in a limp home mode T time.
4. The method of automatically deactivating an engine limp home mode as defined by claim 1 further comprising controlling an electronically controlled valve to close in response to the first pressure value being between a first limit and a second limit.
5. Method for automatically deactivating an engine limp home mode according to claim 1, characterized in that the engine is controlled to continue to remain limp home mode as a function of the first pressure value being outside a first limit and a second limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165695.0A CN112412673B (en) | 2020-10-27 | 2020-10-27 | Fuel system, engine and method for automatically releasing limp mode of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011165695.0A CN112412673B (en) | 2020-10-27 | 2020-10-27 | Fuel system, engine and method for automatically releasing limp mode of engine |
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| Publication Number | Publication Date |
|---|---|
| CN112412673A CN112412673A (en) | 2021-02-26 |
| CN112412673B true CN112412673B (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011165695.0A Active CN112412673B (en) | 2020-10-27 | 2020-10-27 | Fuel system, engine and method for automatically releasing limp mode of engine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020117150A1 (en) * | 2001-02-21 | 2002-08-29 | Sykes Martin A.P. | Control method |
| US6715468B2 (en) * | 2001-11-07 | 2004-04-06 | Denso Corporation | Fuel injection system |
| DE102015205114A1 (en) * | 2015-03-20 | 2016-09-22 | Volkswagen Aktiengesellschaft | Method for avoiding too high system pressures in common-rail systems |
| CN207945016U (en) * | 2017-12-25 | 2018-10-09 | 潍柴动力股份有限公司 | A kind of electronic controlled diesel low pressure oil way diagnostic system and electronic controlled diesel low pressure oil way |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6837940B2 (en) * | 2017-07-10 | 2021-03-03 | ボッシュ株式会社 | Internal combustion engine drive control method and internal combustion engine drive control device |
-
2020
- 2020-10-27 CN CN202011165695.0A patent/CN112412673B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020117150A1 (en) * | 2001-02-21 | 2002-08-29 | Sykes Martin A.P. | Control method |
| US6715468B2 (en) * | 2001-11-07 | 2004-04-06 | Denso Corporation | Fuel injection system |
| DE102015205114A1 (en) * | 2015-03-20 | 2016-09-22 | Volkswagen Aktiengesellschaft | Method for avoiding too high system pressures in common-rail systems |
| CN207945016U (en) * | 2017-12-25 | 2018-10-09 | 潍柴动力股份有限公司 | A kind of electronic controlled diesel low pressure oil way diagnostic system and electronic controlled diesel low pressure oil way |
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| Publication number | Publication date |
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| CN112412673A (en) | 2021-02-26 |
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