CN201666193U - Wide-area oxygen sensor controller - Google Patents
Wide-area oxygen sensor controller Download PDFInfo
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- CN201666193U CN201666193U CN2010201577761U CN201020157776U CN201666193U CN 201666193 U CN201666193 U CN 201666193U CN 2010201577761 U CN2010201577761 U CN 2010201577761U CN 201020157776 U CN201020157776 U CN 201020157776U CN 201666193 U CN201666193 U CN 201666193U
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- fuel ratio
- oxygen sensor
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- microprocessor
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Abstract
The utility model discloses a wide-area oxygen sensor controller comprising a microprocessor, an interface circuit, a heating control circuit, an air-fuel ratio signal output circuit, a communication module and the like, wherein the microprocessor is respectively connected with the interface circuit, the heating control circuit, the air-fuel ratio signal output circuit and the communication module, can collect an air-fuel ratio feedback signal, a pump current signal, a temperature signal and fault information, generates a heating signal to control the heating of a wide-area oxygen sensor, shapes and outputs the air-fuel ratio feedback signal and is communicated with other controllers by the communication module. The wide-area oxygen sensor controller is an independent controller used in an engine system, can be directly added into an original system, has simple interfaces with other controllers of a system and has convenient and quick integration.
Description
Technical field
The utility model relates to engine electric-controlled field, particularly a kind of motor exhaust oxygen content detecting sensor (being broad domain oxygen sensor) controller.
Background technique
Along with improving constantly that motor vehicle exhaust emission is required, traditional switching mode lambda sensor can not satisfy the requirement of maximum discharge standard, the substitute is the higher linear broad domain oxygen sensor of control accuracy.
Broad domain oxygen sensor (Universal Exhaust Gas Oxygen Sens, be called for short UEGO) can provide accurate air-fuel ratio (λ) to feed back signal to electronic control unit (ECU, engine control unit), thereby ECU accurately controls injection time, makes the interior mixed air concentration of cylinder remain chemically correct fuel value (λ=1).The use of broad domain oxygen sensor has improved the control accuracy of ECU, has brought into play the effect of ternary catalyzing unit to greatest extent, has reduced discharge of harmful gases more effectively.The research and development of broad domain oxygen sensor and controller thereof match with safety, environmental protection, energy-conservation three big themes in the current development of automobile, have certain reality and far-reaching significance.
Broad domain oxygen sensor is to have increased a pump oxygen diaphragm on the basis of regular tap type lambda sensor.When engine exhaust gas is flowed through the broad domain oxygen sensor head, it will feed back a voltage signal and give controller, inform in the controller cylinder mixed gas be rare (λ＞1) or dense (λ＜1); Controller will produce the pump electric current broad domain oxygen sensor pump oxygen diaphragm of flowing through afterwards, thereby consume excess of oxygen or fuel, and the concentration of mixed gas in the cylinder is maintained near the theoretical value (λ=1) all the time.
The working principle of broad domain oxygen sensor mainly is:
1, the feedback signal of pick-up transducers.
2, produce the pump current controling signal.
3, by gathering the pump electric current voltage that a certain specific electrical resistance produces of flowing through, learn the size of pump electric current, be input to control chip by the AD conversion again.
4, the internal resistance of measuring transducer changes, and is input to control chip by the AD conversion, thereby produces the signal of a control sensor heaters, makes sensor remain at optimum working temperature.
Linear broad domain oxygen sensor is in the past just in laboratory using.Constantly severe along with Abgasgesetz has the trend of extensive real vehicle standard configuration now; The broad domain oxygen sensor control module all is to be integrated among the customization ECU of various motors on the market, or is applied to instrument field, does not also have independently ripe broad domain oxygen sensor controller, and this has become the huge obstacle that broad domain oxygen sensor is used.
The model utility content
The technical problem that the utility model mainly solves is to provide a kind of broad domain oxygen sensor controller, and it is the independent control that a kind of energy real vehicle that is used for engine system is used.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of broad domain oxygen sensor controller comprises: microprocessor, interface circuit, heating control circuit, air fuel ratio signal output apparatus, communication module;
Described interface circuit and described microprocessor communication are used to gather the air-fuel ratio feedback signal of broad domain oxygen sensor, and this air-fuel ratio feedback signal is sent to described microprocessor; And produce the pump electric current according to this air-fuel ratio feedback signal, testing pump size of current and be converted into voltage and form the pump current signal and be sent to described microprocessor simultaneously; The variation formation temperature signal that is used to detect the internal resistance variation of broad domain oxygen sensor and be converted into voltage is sent to described microprocessor; Also be used to realize fault diagnosis and fault message is sent to described microprocessor; Described microprocessor is used to receive described air-fuel ratio feedback signal, pump current signal, temperature signal and fault message, and described interface circuit is carried out initial configuration;
Described microprocessor links to each other with described heating control circuit, be used for producing heating signal and be sent to described heating control circuit according to described temperature signal, thereby control described heating control circuit, and be sent to described heating control circuit according to described fault message generation trouble signal; Described heating control circuit is used for according to the heating signal control broad domain oxygen sensor heating that receives, and shields described heating signal when receiving trouble signal;
Described microprocessor links to each other with described air fuel ratio signal output apparatus, and the described air-fuel ratio feedback signal that receives is sent to described air fuel ratio signal output apparatus; Described air fuel ratio signal output apparatus is used for the described air-fuel ratio feedback signal shaping that will receive, increases the rotating band loading capability, and exports by interface;
Described microprocessor links to each other with described communication module, is used for described air-fuel ratio feedback signal, pump current signal and fault message are exported by described communication module, and obtains control command by described communication module.
The beneficial effects of the utility model are:
(1) broad domain oxygen sensor controller independently can directly be added in the original system, saves many expenses of exploitation again;
(2) broad domain oxygen sensor controller has air fuel ratio (lambda) output interface simply, and voltage output can easily be added in the original system, realizes the original system upgrading;
(3) broad domain oxygen sensor controller has the CAN communication interface, can remote transmission lambda information, be fit to experimental applications;
(4) the utility model establishes one's own system, and is simple, integrated convenient with system other control unit interfaces.
Description of drawings
Fig. 1 is the structural representation of the utility model broad domain oxygen sensor controller.
Embodiment
Further describe specific embodiment of the utility model below in conjunction with accompanying drawing:
Please referring to Fig. 1, the utility model broad domain oxygen sensor controller comprises: microprocessor, interface circuit, heating control circuit, air fuel ratio signal output apparatus, communication module, power management module.Microprocessor adopts 16 bit processors that fly Si Kaer company, is assigned in the interface circuit of the broad domain oxygen sensor special chip CJ125 of Bosch as broad domain oxygen sensor.Power management module, be used for supply voltage (12V/24V) step-down filtering to 5V, for the logical device in the broad domain oxygen sensor controller provides various power supplys, the while monitoring power voltage, guarantee microprocessor energy proper functioning, and when dangerous fluctuation appears in supply voltage, provide reset signal to microprocessor.
Described interface circuit and described microprocessor communication are used to gather the air-fuel ratio feedback signal of broad domain oxygen sensor, and this air-fuel ratio feedback signal is sent to described microprocessor; And produce the pump electric current according to this air-fuel ratio feedback signal, testing pump size of current and be converted into voltage and form the pump current signal and be sent to described microprocessor simultaneously.The variation formation temperature signal that described interface circuit also is used to detect the internal resistance variation of broad domain oxygen sensor and be converted into voltage is sent to described microprocessor.In addition, described interface circuit also can be used for realizing fault diagnosis and fault message is sent to described microprocessor.Described microprocessor is used to receive described air-fuel ratio feedback signal, pump current signal, temperature signal and fault message, and described interface circuit is carried out initial configuration, for example, and initial configuration pump Current Amplification, realization self study demarcation etc.
Wherein, described interface circuit and described microprocessor are by SPI (Serial Peripheralinterface, Serial Peripheral Interface) bus communication, it comprises the AD modular converter, is used for respectively pump size of current and internal resistance variation being converted to pump current signal and temperature signal.Described interface circuit also comprises register, is used to store various fault messages.
Described microprocessor links to each other with described heating control circuit, is used for producing heating signal according to its temperature signal that receives and is sent to described heating control circuit, thereby control described heating control circuit.Wherein, described microprocessor also comprises PID (Proportional Integral Differential, proportion integration differentiation) control module, is used to realize the PID closed loop control to described heating control circuit.Described microprocessor also can produce trouble signal according to its fault message that receives and be sent to described heating control circuit.Described heating control circuit heats according to the heating signal control broad domain oxygen sensor that receives, and shields described heating signal when receiving trouble signal.In order to reflect air fuel ratio (lambda) value of tail gas accurately, the utility model is controlled the heating of broad domain oxygen sensor by heating control circuit, thereby can guarantee that broad domain oxygen sensor works in than the stationary temperature scope at one.
Described microprocessor links to each other with described air fuel ratio signal output apparatus, and the described air-fuel ratio feedback signal that receives is sent to described air fuel ratio signal output apparatus; Described air fuel ratio signal output apparatus is used for the described air-fuel ratio feedback signal shaping that will receive, increases the rotating band loading capability, and by the output of lambda output interface.
Described microprocessor links to each other with described communication module, be used for described air-fuel ratio feedback signal, pump current signal and fault message are exported to by described communication module other controllers of engine system, and obtain control command by described communication module, according to the work of this controller of order control.Wherein, described communication module adopts the CAN communication interface to transmit signal.
The independent control that the broad domain oxygen sensor controller of present embodiment is used as a kind of energy real vehicle can be realized the control to broad domain oxygen sensor: the feedback signal of broad domain oxygen sensor thermostatically control, pick-up transducers, generation pump current controling signal, the control of signal voltage magnification factor, fault diagnosis processing etc.
Description of the present utility model and application are illustrative, are not to want with scope restriction of the present utility model in the above-described embodiments.Here disclosed embodiment's distortion and change are possible, and the various parts of embodiment's replacement and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present utility model or substantive characteristics the utility model can be realized with other forms.Under the situation that does not break away from the utility model scope and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (6)
1. a broad domain oxygen sensor controller is characterized in that: microprocessor, interface circuit, heating control circuit, air fuel ratio signal output apparatus, communication module;
Described interface circuit and described microprocessor communication are used to gather the air-fuel ratio feedback signal of broad domain oxygen sensor, and this air-fuel ratio feedback signal is sent to described microprocessor; And produce the pump electric current according to this air-fuel ratio feedback signal, testing pump size of current and be converted into voltage and form the pump current signal and be sent to described microprocessor simultaneously; The variation formation temperature signal that is used to detect the internal resistance variation of broad domain oxygen sensor and be converted into voltage is sent to described microprocessor; Also be used to realize fault diagnosis and fault message is sent to described microprocessor; Described microprocessor is used to receive described air-fuel ratio feedback signal, pump current signal, temperature signal and fault message, and described interface circuit is carried out initial configuration;
Described microprocessor links to each other with described heating control circuit, be used for producing heating signal and be sent to described heating control circuit according to described temperature signal, thereby control described heating control circuit, and be sent to described heating control circuit according to described fault message generation trouble signal; Described heating control circuit is used for according to the heating signal control broad domain oxygen sensor heating that receives, and shields described heating signal when receiving trouble signal;
Described microprocessor links to each other with described air fuel ratio signal output apparatus, and the described air-fuel ratio feedback signal that receives is sent to described air fuel ratio signal output apparatus; Described air fuel ratio signal output apparatus is used for the described air-fuel ratio feedback signal shaping that will receive, increases the rotating band loading capability, and exports by interface;
Described microprocessor links to each other with described communication module, is used for described air-fuel ratio feedback signal, pump current signal and fault message are exported by described communication module, and obtains control command by described communication module.
2. according to the described a kind of broad domain oxygen sensor controller of claim 1, it is characterized in that: described interface circuit is communicated by letter by spi bus with described microprocessor.
3. according to the described a kind of broad domain oxygen sensor controller of claim 1, it is characterized in that: described interface circuit comprises the AD modular converter, is used for respectively described pump size of current and described internal resistance variation being converted to pump current signal and temperature signal.
4. according to the described a kind of broad domain oxygen sensor controller of claim 1, it is characterized in that: described interface circuit comprises register, is used to store described fault message.
5. according to the described a kind of broad domain oxygen sensor controller of claim 1, it is characterized in that: described microprocessor also comprises pid control module, is used for realizing described heating control circuit PID closed loop control.
6. according to the described a kind of broad domain oxygen sensor controller of claim 1, it is characterized in that: described communication module comprises the CAN communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201577761U CN201666193U (en) | 2010-04-13 | 2010-04-13 | Wide-area oxygen sensor controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201577761U CN201666193U (en) | 2010-04-13 | 2010-04-13 | Wide-area oxygen sensor controller |
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| CN201666193U true CN201666193U (en) | 2010-12-08 |
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| CN2010201577761U Expired - Lifetime CN201666193U (en) | 2010-04-13 | 2010-04-13 | Wide-area oxygen sensor controller |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156220A (en) * | 2015-10-12 | 2015-12-16 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oxygen sensor control system and method |
| CN105242571A (en) * | 2015-10-21 | 2016-01-13 | 华中科技大学 | Wide-range oxygen sensor controller simulation system |
| CN105604709A (en) * | 2016-03-07 | 2016-05-25 | 马瑞利（中国）有限公司 | Multipoint electronic injection engine cylinder deactivation control system and method |
| CN105629720A (en) * | 2015-12-30 | 2016-06-01 | 常州联德电子有限公司 | Wide-band oxygen sensor temperature control method |
| CN106645307A (en) * | 2016-08-24 | 2017-05-10 | 浙江朗德电子科技有限公司 | Calibration method of vehicle tail gas sensor resistor |
| CN106716120A (en) * | 2014-09-11 | 2017-05-24 | 罗伯特·博世有限公司 | Method and device for detecting at least a portion of the measurement gas component having bound oxygen in a gas mixture |
| CN109073591A (en) * | 2016-05-02 | 2018-12-21 | 大陆汽车有限公司 | Method for operating probe |
| CN110687187A (en) * | 2019-11-21 | 2020-01-14 | 深圳市久驰精密科技有限公司 | Gas oxygen concentration sensor |
-
2010
- 2010-04-13 CN CN2010201577761U patent/CN201666193U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716120A (en) * | 2014-09-11 | 2017-05-24 | 罗伯特·博世有限公司 | Method and device for detecting at least a portion of the measurement gas component having bound oxygen in a gas mixture |
| CN106716120B (en) * | 2014-09-11 | 2019-11-19 | 罗伯特·博世有限公司 | There are the method and apparatus of the content of the measurement gas componant of the oxygen combined at least one in detection gas mixture |
| US10429344B2 (en) | 2014-09-11 | 2019-10-01 | Robert Bosch Gmbh | Method and device for detecting at least a portion of the measuring gas component containing bound oxygen in a gas mixture |
| CN105156220A (en) * | 2015-10-12 | 2015-12-16 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Oxygen sensor control system and method |
| CN105242571B (en) * | 2015-10-21 | 2018-03-09 | 华中科技大学 | A kind of broad domain oxygen sensor controller analogue system |
| CN105242571A (en) * | 2015-10-21 | 2016-01-13 | 华中科技大学 | Wide-range oxygen sensor controller simulation system |
| CN105629720A (en) * | 2015-12-30 | 2016-06-01 | 常州联德电子有限公司 | Wide-band oxygen sensor temperature control method |
| CN105604709A (en) * | 2016-03-07 | 2016-05-25 | 马瑞利（中国）有限公司 | Multipoint electronic injection engine cylinder deactivation control system and method |
| CN109073591A (en) * | 2016-05-02 | 2018-12-21 | 大陆汽车有限公司 | Method for operating probe |
| US10845331B2 (en) | 2016-05-02 | 2020-11-24 | Vitesco Technologies GmbH | Method for operating an internal combustion engine |
| CN109073591B (en) * | 2016-05-02 | 2021-01-05 | 大陆汽车有限公司 | Method for operating a probe |
| DE102016207516B4 (en) | 2016-05-02 | 2021-10-28 | Vitesco Technologies GmbH | Method for determining the aging of a probe of an internal combustion engine designed to determine a gas concentration of a gas mixture |
| CN106645307A (en) * | 2016-08-24 | 2017-05-10 | 浙江朗德电子科技有限公司 | Calibration method of vehicle tail gas sensor resistor |
| CN106645307B (en) * | 2016-08-24 | 2019-04-05 | 浙江朗德电子科技有限公司 | A kind of scaling method of Vehicular exhaust sensor resistance |
| CN110687187A (en) * | 2019-11-21 | 2020-01-14 | 深圳市久驰精密科技有限公司 | Gas oxygen concentration sensor |
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Granted publication date: 20101208 |
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