CN102721894B - Fuel metering valve drive diagnostic system - Google Patents
Fuel metering valve drive diagnostic system Download PDFInfo
- Publication number
- CN102721894B CN102721894B CN201110079351.2A CN201110079351A CN102721894B CN 102721894 B CN102721894 B CN 102721894B CN 201110079351 A CN201110079351 A CN 201110079351A CN 102721894 B CN102721894 B CN 102721894B
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- driving circuit
- metering valve
- flash
- fuel metering
- low limit
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Abstract
The invention discloses a fuel metering valve drive diagnostic system which comprises a microprocessor, a high side driver circuit, a low side driver circuit, a high side current sampling circuit, a low side current sampling circuit, and a low side voltage sampling circuit. A fuel metering valve is connected to a power supply through the high side driver circuit and is in grounding through the low side driver circuit. The microprocessor outputs a high side driver control signal to control the open and close of the high side driver circuit and outputs a low side driver control signal to control the open and close of the low side driver circuit. A fuel metering valve drive diagnostic result is outputted according to current sampling from the fuel metering valve to the high side driver circuit, current sampling from the fuel metering valve to the low side driver circuit, and voltage sampling of the fuel metering valve and the low side driver circuit. According to the fuel metering valve drive diagnostic system, diagnosing six kinds of failure modes of fuel metering valve drive can be realized.
Description
Technical field
The present invention relates to engine electric control fuel oil spraying technology, particularly a kind of fuel metering valve drives diagnostic system.
Background technology
Fuel metering valve drive system as shown in Figure 1, comprise microprocessor (MCU), flash driving circuit, low limit driving circuit, fuel metering valve is by flash driving circuit BOR Bunker of Redelivery metering valve driving power, by low limit driving circuit ground connection, opening and closing of microprocessor output flash drive control signal control flash driving circuit, exports opening and closing of the low limit low limit of drive control signal control driving circuit.Be defined as A end if fuel metering valve is connect to flash driving circuit end, connect low limit driving circuit end and be defined as B end.Fuel metering valve drives six kinds of fault modes:
(1) A holds power supply short circuit; (2) A end shorted to earth; (3) B holds power supply short circuit; (4) B end shorted to earth; (5) A end and B terminal shortcircuit; (6) A end opens circuit with B end.
Existing fuel metering valve drives in diagnostic system, conventionally only can hold shorted to earth, B end to diagnose power supply short circuit, three kinds of fault modes of B end shorted to earth to A.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of fuel metering valve and drives diagnostic system, can realize and drive six kinds of fault modes to diagnose to fuel metering valve.
For solving the problems of the technologies described above, fuel metering valve of the present invention drives diagnostic system, comprise microprocessor, flash driving circuit, low limit driving circuit, fuel metering valve is by flash driving circuit BOR Bunker of Redelivery metering valve driving power, by low limit driving circuit ground connection, fuel metering valve is connect to flash driving circuit end and be defined as A end, connect low limit driving circuit end and be defined as B end, also comprise flash current sampling circuit, low limit current sampling circuit, low polygonal voltage sample circuit;
Described flash current sampling circuit, for holding the electric current of flash driving circuit to sample to A;
Described low limit current sampling circuit, samples for the electric current of B being held to low limit driving circuit;
Described low polygonal voltage sample circuit, for sampling to the voltage of B end;
Described microprocessor, export opening and closing of flash drive control signal control flash driving circuit, export opening and closing of the low limit of drive control signal control, low limit driving circuit, and hold current sample, B in flash driving circuit to hold the current sample in the driving circuit of low limit, the voltage sample output fuel metering valve of B end to drive diagnostic result according to A.
Described microprocessor work process is as follows:
One. microprocessor output flash drive control signal control flash driving circuit cuts out, and exports the low limit of drive control signal control, low limit driving circuit and closes, and makes fuel metering valve in off working state;
Two., under off working state, if the voltage of B end is more than or equal to sets low pressure and be less than or equal to setting high pressure at fuel metering valve, carrying out step 3; If the voltage of B end is less than setting low pressure, carry out step 5; If the voltage of B end is greater than setting high pressure, carry out step 7;
Three. microprocessor output flash drive control signal control flash driving circuit is opened, and exports the low limit of drive control signal control, low limit driving circuit and opens, and makes fuel metering valve enter duty;
Four. fuel metering valve enters after duty,
If A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit higher than setting high electric current, microprocessor output side a and b short circuit diagnostic message, then enters step 9;
If A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit lower than setting low current, microprocessor output side a and b open circuit diagnostic message, then enters step 9;
Five. microprocessor output flash drive control signal control flash driving circuit is opened;
Six. after flash driving circuit is opened,
Set high electric current if A holds the electric current in flash driving circuit to be more than or equal to, microprocessor output A end shorted to earth diagnostic message, then enters step 9;
Otherwise microprocessor output B end shorted to earth diagnostic message, then enters step 9;
Seven. microprocessor is exported the low limit of drive control signal control, low limit driving circuit and is opened;
Eight. after low limit driving circuit is opened,
Set high electric current if B holds the electric current in the driving circuit of low limit to be more than or equal to, microprocessor output B holds power supply short circuit diagnostic message, then enters step 9;
Otherwise microprocessor output A holds power supply short circuit diagnostic message, then enters step 9;
Nine. diagnosis finishes.
In step 4, fuel metering valve enters after duty, if A holds electric current or the B in flash driving circuit to hold the electric current in the driving circuit of low limit to be more than or equal to setting low current and to be less than or equal to the high electric current of setting, the normal connection diagnostic information of microprocessor output side a and b, then enters step 9.
Described fuel metering valve driving power voltage can be 12V, and described setting low pressure can be 0.5V, and described setting high pressure can be 4.5V, and described setting low current can be 0.2A, and the high electric current of described setting can be 10A.
Fuel metering valve of the present invention drives diagnostic system, comprehensively judge fuel metering valve in conjunction with drive control signal again according to feedback signal and drive concrete fault, can detect and judge A end shorted to earth, B end, is realized and is driven six kinds of fault modes to diagnose to above fuel metering valve power supply short circuit, B end shorted to earth, A end and B terminal shortcircuit, six kinds of faults of A end and B end open circuit power supply short circuit, A end.
Brief description of the drawings
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is fuel metering valve drive system schematic diagram;
Fig. 2 is that fuel metering valve of the present invention drives diagnostic system one embodiment schematic diagram;
Fig. 3 is that fuel metering valve of the present invention drives diagnostic system one embodiment microprocessor work process schematic diagram.
Embodiment
Fuel metering valve of the present invention drives diagnostic system one embodiment as shown in Figure 2, comprises microprocessor (MCU), flash driving circuit, low limit driving circuit, flash current sampling circuit, low limit current sampling circuit, low polygonal voltage sample circuit; Fuel metering valve is by flash driving circuit BOR Bunker of Redelivery metering valve driving power, by low limit driving circuit ground connection; Fuel metering valve is connect to flash driving circuit end and be defined as A end, connect low limit driving circuit end and be defined as B end;
Described flash current sampling circuit, for hold the electric current of flash driving circuit to sample to A, output flash current feedback signal is to microprocessor;
Described low limit current sampling circuit, samples for the electric current of B being held to low limit driving circuit, exports low limit current feedback signal to microprocessor;
Described low polygonal voltage sample circuit, for the voltage of B end is sampled, exports low polygonal voltage and feeds back signal to microprocessor;
Described microprocessor, export opening and closing of flash drive control signal control flash driving circuit, export opening and closing of the low limit low limit of drive control signal control driving circuit, and hold current sample, B in flash driving circuit to hold the current sample in the driving circuit of low limit, the voltage sample output fuel metering valve of B end to drive diagnostic result according to A, microprocessor work process as shown in Figure 3, comprises the following steps:
One. microprocessor output flash drive control signal control flash driving circuit cuts out, and exports the low limit of drive control signal control, low limit driving circuit and closes, and makes fuel metering valve in off working state;
Two., under off working state, set low pressure and be less than or equal to setting high pressure if the voltage of B end is more than or equal at fuel metering valve, judge A end, B end with between ground or power supply all without short circuit, carry out step 3; If the voltage of B end is less than setting low pressure, judge A end or B end shorted to earth, carry out step 5; If the voltage of B end is greater than setting high pressure, judge that A end or B hold power supply short circuit, carry out step 7;
Three. microprocessor output flash drive control signal control flash driving circuit is opened, and exports the low limit of drive control signal control, low limit driving circuit and opens, and makes fuel metering valve enter duty;
Four. fuel metering valve enters after duty,
If A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit higher than setting high electric current, microprocessor judges is side a and b short circuit, and output side a and b short circuit diagnostic message, then enters step 9;
If A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit lower than setting low current, microprocessor judges is side a and b open circuit, and output side a and b open circuit diagnostic message, then enters step 9;
Set low current and be less than and set high electric current if A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit to be greater than, microprocessor judges is that side a and b normally connects, the normal connection diagnostic information of output side a and b, then enters step 9;
Five. microprocessor output flash drive control signal control flash driving circuit is opened;
Six. after flash driving circuit is opened,
Set high electric current if A holds the electric current in flash driving circuit to be more than or equal to, microprocessor judges is A end shorted to earth, and output A end shorted to earth diagnostic message, then enters step 9;
Otherwise microprocessor judges is B end shorted to earth, output B end shorted to earth diagnostic message, then enters step 9;
Seven. microprocessor is exported the low limit of drive control signal control, low limit driving circuit and is opened;
Eight. after low limit driving circuit is opened,
If B holds the electric current in the driving circuit of low limit to be more than or equal to and sets high electric current, microprocessor judges is that B holds power supply short circuit, and output B holds power supply short circuit diagnostic message, then enters step 9;
Otherwise microprocessor judges is that A holds power supply short circuit, output A holds power supply short circuit diagnostic message, then enters step 9;
Nine. diagnosis finishes.
One preferred embodiment, fuel metering valve driving power voltage is 12V, and setting low pressure is 0.5V, and setting high pressure is 4.5V, and setting low current is 0.2A, setting high electric current is 10A.
Fuel metering valve of the present invention drives diagnostic system, fuel metering valve is connect to flash driving circuit end and be defined as A end, connect low limit driving circuit end and be defined as B end, flash current sampling circuit is set holds the electric current in flash driving circuit to sample to A, low limit current sampling circuit is set and holds the electric current in the driving circuit of low limit to sample to B, low polygonal voltage sample circuit is set the voltage of B end is sampled;
At fuel metering valve under off working state, the voltage of B end is when setting low pressure, A end or B end shorted to earth are described, after flash driving circuit is opened, in the time of A end shorted to earth, A holds the electric current in flash driving circuit can exceed the high electric current of setting, and therefore microprocessor judges A end shorted to earth;
At fuel metering valve under off working state, the voltage of B end is when setting high pressure, illustrate that A end or B hold power supply short circuit, after low limit driving circuit is opened, in the time that B holds power supply short circuit, B holds the electric current in the driving circuit of low limit can exceed the high electric current of setting, and therefore microprocessor is judged B and held power supply short circuit;
Fuel metering valve enters after duty, A end is equivalent to power end, B end is equivalent to ground, in the time of A end and B terminal shortcircuit, just be equivalent to power supply and ground short circuit, A holds electric current or the B in flash driving circuit to hold the electric current in the driving circuit of low limit can exceed the high electric current of setting, and therefore microprocessor judges A end and B terminal shortcircuit;
Fuel metering valve enters after duty, A end is equivalent to power end, B end is equivalent to ground, if when A end is opened a way with B end, whole driving loop will not have electric current and produce, A holds electric current in flash driving circuit or B to hold the electric current in the driving circuit of low limit can be lower than setting low current, and therefore microprocessor judges A end and B end open circuit.
Fuel metering valve of the present invention drives diagnostic system, comprehensively judge fuel metering valve in conjunction with drive control signal again according to feedback signal and drive concrete fault, can detect and judge A end shorted to earth, B end, is realized and is driven six kinds of fault modes to diagnose to above fuel metering valve power supply short circuit, B end shorted to earth, A end and B terminal shortcircuit, six kinds of faults of A end and B end open circuit power supply short circuit, A end.
Claims (3)
1. a fuel metering valve drives diagnostic system, comprise microprocessor, flash driving circuit, low limit driving circuit, fuel metering valve is by flash driving circuit BOR Bunker of Redelivery metering valve driving power, by low limit driving circuit ground connection, fuel metering valve is connect to flash driving circuit end and be defined as A end, connect low limit driving circuit end and be defined as B end, it is characterized in that, also comprise flash current sampling circuit, low limit current sampling circuit, low polygonal voltage sample circuit;
Described flash current sampling circuit, for holding the electric current of flash driving circuit to sample to A;
Described low limit current sampling circuit, samples for the electric current of B being held to low limit driving circuit;
Described low polygonal voltage sample circuit, for sampling to the voltage of B end;
Described microprocessor, export opening and closing of flash drive control signal control flash driving circuit, export opening and closing of the low limit of drive control signal control, low limit driving circuit, and hold current sample, B in flash driving circuit to hold the current sample in the driving circuit of low limit, the voltage sample output fuel metering valve of B end to drive diagnostic result according to A;
Described microprocessor work process comprises the steps:
One. microprocessor output flash drive control signal control flash driving circuit cuts out, and exports the low limit of drive control signal control, low limit driving circuit and closes, and makes fuel metering valve in off working state;
Two., under off working state, if the voltage of B end is more than or equal to sets low pressure and be less than or equal to setting high pressure at fuel metering valve, carrying out step 3; If the voltage of B end is less than setting low pressure, carry out step 5; If the voltage of B end is greater than setting high pressure, carry out step 7;
Three. microprocessor output flash drive control signal control flash driving circuit is opened, and exports the low limit of drive control signal control, low limit driving circuit and opens, and makes fuel metering valve enter duty;
Four. fuel metering valve enters after duty,
If A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit higher than setting high electric current, microprocessor output side a and b short circuit diagnostic message, then enters step 9;
If A holds electric current in flash driving circuit or B to hold electric current in the driving circuit of low limit lower than setting low current, microprocessor output side a and b open circuit diagnostic message, then enters step 9;
Five. microprocessor output flash drive control signal control flash driving circuit is opened;
Six. after flash driving circuit is opened,
Set high electric current if A holds the electric current in flash driving circuit to be more than or equal to, microprocessor output A end shorted to earth diagnostic message, then enters step 9;
Otherwise microprocessor output B end shorted to earth diagnostic message, then enters step 9;
Seven. microprocessor is exported the low limit of drive control signal control, low limit driving circuit and is opened;
Eight. after low limit driving circuit is opened,
Set high electric current if B holds the electric current in the driving circuit of low limit to be more than or equal to, microprocessor output B holds power supply short circuit diagnostic message, then enters step 9;
Otherwise microprocessor output A holds power supply short circuit diagnostic message, then enters step 9;
Nine. diagnosis finishes.
2. fuel metering valve according to claim 1 drives diagnostic system, it is characterized in that, in step 4, fuel metering valve enters after duty, if A holds electric current or the B in flash driving circuit to hold the electric current in the driving circuit of low limit to be more than or equal to setting low current and to be less than or equal to the high electric current of setting, the normal connection diagnostic information of microprocessor output side a and b, then enters step 9.
3. fuel metering valve according to claim 1 drives diagnostic system, it is characterized in that, fuel metering valve driving power voltage is 12V, described setting low pressure is 0.5V, described setting high pressure is 4.5V, and described setting low current is 0.2A, and the high electric current of described setting is 10A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079351.2A CN102721894B (en) | 2011-03-31 | 2011-03-31 | Fuel metering valve drive diagnostic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079351.2A CN102721894B (en) | 2011-03-31 | 2011-03-31 | Fuel metering valve drive diagnostic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102721894A CN102721894A (en) | 2012-10-10 |
| CN102721894B true CN102721894B (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110079351.2A Expired - Fee Related CN102721894B (en) | 2011-03-31 | 2011-03-31 | Fuel metering valve drive diagnostic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2556326A (en) * | 2016-07-25 | 2018-05-30 | Continental automotive systems inc | Half-bridge driver fault diagnostic system and method |
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|---|---|---|---|---|
| CN103176101B (en) * | 2013-03-05 | 2015-12-02 | 中联重科股份有限公司 | A kind of detection method of line fault, equipment and system |
| CN107782563A (en) * | 2017-10-18 | 2018-03-09 | 重庆市弘鼎圣科技有限公司 | Car fault auto-detecting system |
| CN109725210B (en) * | 2017-10-31 | 2021-07-16 | 长城汽车股份有限公司 | Signal acquisition circuit, engine controller and signal acquisition method |
| CN108519549B (en) * | 2018-03-21 | 2020-09-18 | 宝沃汽车（中国）有限公司 | Fault diagnosis method and device, keyless entry and starting device and vehicle |
| CN111766502B (en) * | 2019-04-01 | 2022-06-17 | 宁德时代新能源科技股份有限公司 | Fault detection circuit and fault detection method |
| CN111090272B (en) * | 2019-12-11 | 2021-09-28 | 一汽解放汽车有限公司 | Fault diagnosis device and method and vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764884A (en) * | 1985-05-14 | 1988-08-16 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Failure detecting apparatus of a control unit for a vehicle |
| US5572142A (en) * | 1994-05-06 | 1996-11-05 | Nissan Motor Co., Ltd. | Apparatus and method for diagnosing presence or absence of breakage in electromagnetic coil means applicable to breakage diagnosis for stepping motor |
| CN201284694Y (en) * | 2008-10-09 | 2009-08-05 | 天津大学 | Oil ejector digital driving and fault diagnosis circuit based on CPLD |
| CN201548643U (en) * | 2009-11-05 | 2010-08-11 | 联创汽车电子有限公司 | Load open circuit or short circuit detecting system for vehicle controller |
| CN201681278U (en) * | 2010-05-14 | 2010-12-22 | 马鞍山普优电子科技有限公司 | Novel driving circuit for fuel gas injection valve |
-
2011
- 2011-03-31 CN CN201110079351.2A patent/CN102721894B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764884A (en) * | 1985-05-14 | 1988-08-16 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Failure detecting apparatus of a control unit for a vehicle |
| US5572142A (en) * | 1994-05-06 | 1996-11-05 | Nissan Motor Co., Ltd. | Apparatus and method for diagnosing presence or absence of breakage in electromagnetic coil means applicable to breakage diagnosis for stepping motor |
| CN201284694Y (en) * | 2008-10-09 | 2009-08-05 | 天津大学 | Oil ejector digital driving and fault diagnosis circuit based on CPLD |
| CN201548643U (en) * | 2009-11-05 | 2010-08-11 | 联创汽车电子有限公司 | Load open circuit or short circuit detecting system for vehicle controller |
| CN201681278U (en) * | 2010-05-14 | 2010-12-22 | 马鞍山普优电子科技有限公司 | Novel driving circuit for fuel gas injection valve |
Non-Patent Citations (2)
| Title |
|---|
| 燃油分层喷射发动机燃油系统的故障诊断;陆超;《昆明冶金高等专科学校学报》;20100131;第26卷(第1期);第45-47页 * |
| 陆超.燃油分层喷射发动机燃油系统的故障诊断.《昆明冶金高等专科学校学报》.2010,第26卷(第1期),45-47. |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2556326A (en) * | 2016-07-25 | 2018-05-30 | Continental automotive systems inc | Half-bridge driver fault diagnostic system and method |
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| CN102721894A (en) | 2012-10-10 |
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