CN201321900Y - Temperature and pressure measuring device for car - Google Patents
Temperature and pressure measuring device for car Download PDFInfo
- Publication number
- CN201321900Y CN201321900Y CNU200820133104XU CN200820133104U CN201321900Y CN 201321900 Y CN201321900 Y CN 201321900Y CN U200820133104X U CNU200820133104X U CN U200820133104XU CN 200820133104 U CN200820133104 U CN 200820133104U CN 201321900 Y CN201321900 Y CN 201321900Y
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- temperature
- pressure
- cabin
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Abstract
The utility model relates to the field of vehicle motor control, and provides an automobile-used temperature and pressure measuring device. The automobile-used temperature and pressure measuring device comprises an inlet gas measuring device used for measuring inlet temperature and pressure signals of the automobile engine, an integrated control unit which is connected with the inlet gas measuring device and used for processing inlet temperature and pressure signal, and an in-cabin measuring unit which is connected with the integrated control unit and used for measuring the temperature and the pressure signal inside the engine cabin. Through adding the measuring unit inside the engine cabin, the automobile-used temperature and pressure measuring device provided by the utility model improves the accuracy of injection controlling parameter of the control system for engine fuel injection.
Description
Technical field
The utility model relates to vehicle motor control field, more particularly, relates to a kind of automobile-used temperature and pressure measuring device.
Background technique
The electronic fuel injection control system of automobile is measured the intake temperature of motor and pressure to obtain the fuel Injection Control parameter by the temperature and pressure measuring device.
Existing temperature and pressure measuring device is integrated intake temperature and pressure measurement obtain pressure signal in the engine compartment as the input parameter of electronic fuel injection control system with the temperature and pressure signal in the intake manifold and by conversion.It is installed on the intake manifold, the integrated control unit that is provided with pressure measurement cell, temperature measurement unit and is connected respectively with it, this integrated control unit is by analyzing the temperature and pressure signal that the air inlet measuring unit is gathered, pressure in the estimating engine cabin, and the intake temperature that obtained and pressure signal and pressure in engine room signal conversion are exported to the controller of motor, as the Control Parameter of electronic fuel injection control system, be used to control the injection of fuel oil.: the measuring device of the type is the interior pressure and temperature of energy measurement intake manifold only, not atmospheric temperature and pressure in the energy measurement engine compartment, must just can obtain the approximative value of atmospheric pressure in the engine compartment by estimation, thereby the Control Parameter of resulting electronic fuel injection control system is accurate inadequately.
Therefore need a kind of temperature and pressure measuring device, can measure temperature and pressure in intake temperature and pressure and the engine compartment, make the injection Control Parameter of electronic fuel injection control system of automobile more accurate.
The model utility content
Main purpose of the present utility model is to provide a kind of automobile-used temperature and pressure measuring device, is intended to solve not energy measurement of the interior temperature and pressure of prior art automobile engine nacelle, causes the accurate inadequately problem of Control Parameter of Electronic Fuel Injection (EFI) control system.
In order to realize above-mentioned purpose of the present utility model, the utility model provides a kind of automobile-used temperature and pressure measuring device, comprise the intake temperature that is used for the measured automobiles motor and the air inlet measuring unit of pressure signal, and coupled and be used to handle the integrated control unit of intake temperature and pressure signal, also can comprise linking to each other with described integrated control unit and being used to gather measuring unit in the cabin of temperature and pressure signal in the engine compartment.
Measuring unit can comprise temperature measurement unit in the cabin in the described cabin, links to each other with integrated control unit, measures the temperature of motor cabin atmosphere, collects temperature signal in the cabin; Cabin internal pressure measuring unit links to each other with integrated control unit, measures the pressure of motor cabin atmosphere, collects cabin internal pressure signal.
Described integrated control unit can comprise the signal transmitting and receiving module, receive intake temperature and pressure signal that described air inlet measuring unit sends, and temperature and pressure signal in the cabin that measuring unit sends in the described cabin, and send into signal processing module, and the signal processing results of signal processing module is exported; Signal processing module carries out signal analysis and processing to temperature and pressure signal in described intake temperature and pressure signal, the cabin.
Described automobile-used temperature and pressure measuring device also can comprise housing, and described housing can comprise the front protecting cavity that is used to rabbet the air inlet measuring unit, be used to rabbet the back-protective cavity of measuring unit in the cabin and the central cavity that is used to rabbet integrated control unit.
Described front protecting cavity can be tightly connected with intake manifold, and described front protecting cavity top can be provided with the air-flow that communicates with intake manifold and import and export.
Described back-protective cavity top can be provided with engine compartment in the air-flow that communicates import and export.
As from the foregoing, the utility model is in the process of obtaining the Fuel Injection Control Parameter, difference with the prior art is that the utility model set up measuring unit in the engine compartment, measuring unit can accurately be measured the temperature and pressure in the engine compartment in this engine compartment, makes the Control Parameter of engine fuel injection control system more accurate.
Description of drawings
Fig. 1 is the structural representation of temperature and pressure measuring device among the embodiment of the present utility model;
Fig. 2 is the external structure schematic representation of embodiment's middle shell of the present utility model;
Fig. 3 is the in-profile schematic representation of embodiment's middle shell of the present utility model;
Fig. 4 is the circuit theory schematic representation of intake temperature measuring unit among the embodiment of the present utility model;
Fig. 5 is the circuit theory schematic representation of suction pressure measuring unit among the embodiment of the present utility model;
Fig. 6 is the circuit theory schematic representation of temperature measurement unit in embodiment's middle deck of the present utility model;
Fig. 7 is that embodiment's middle deck internal pressure measuring unit of the present utility model cooperates the principle schematic that the cabin internal pressure is measured with integrated control unit.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
In the utility model, by setting up measuring unit in the engine compartment, can accurately measure the temperature and pressure in the engine compartment, improved the validity of Fuel Injection control system injection Control Parameter.
Fig. 1 shows the structure of automobile-used temperature and pressure measuring device among the embodiment of the present utility model.This automobile-used temperature and pressure measuring device comprises: measuring unit 2 in air inlet measuring unit 1, the cabin, the integrated control unit 3 that links to each other with said units.Wherein:
(1) the air inlet measuring unit 1, the one end communicates with intake manifold, the other end links to each other with the signal transmitting and receiving module 31 of integrated control unit 3, comprises the suction pressure measuring unit 12 that is used to gather the intake temperature measuring unit 11 of intake air temperature signals and is used to gather the suction pressure signal.
(2) measuring unit 2 in the cabin, communicate in one end and the engine compartment, the other end links to each other with the signal transmitting and receiving module 31 of integrated control unit 3, comprises temperature measurement unit 21 and the cabin internal pressure measuring unit 22 that is used for atmospheric pressure in the survey room in the cabin that is used for atmospheric temperature in the survey room.
(3) integrated control unit 3, its output terminal links to each other with the controller of motor, be provided with signal transmitting and receiving module 31 and signal processing module 32, this signal processing module 32 is used to handle temperature and the pressure signal that send receive module receives, and signal transmitting and receiving module 31 is used to receive measuring unit 2 is gathered in air inlet measuring unit 1 and the cabin temperature and pressure signal and signal processing module 32 handled temperature and pressure signal result are sent to engine controller.
In a preferred embodiment, temperature signal is sent to the communication network of motor in the integrated control unit 3 handled cabins through signal transmitting and receiving module 31, as the temperature control parameter of engine temperature control system, to maintain in the suitable temperature range in the assurance engine compartment.
For the ease of understanding, Fig. 2 shows the external structure of embodiment's middle shell 4 of the present utility model, and this housing 4 is provided with front protecting cavity 41, back-protective cavity 42 and central cavity 43.Protect the both sides of cavity 42 to be provided with mounting structure 423 overleaf, this mounting structure 423 is the both sides that wing is positioned at the back-protective cavity, comprises two attachment holes 4231, is used for housing 4 is fixedlyed connected with intake manifold.Should be noted that, the external shape of the utility model housing 4 and structure have multiple scheme, are not limited to profile and structure in the accompanying drawing, the profile of other similar housings 4, for example mounting structure 423 links to each other with housing 4 and forms trapezoidally, also can use the scope that the utility model is set forth.
In a preferred embodiment, front protecting cavity 41 is tightly connected with intake manifold, and is provided with the structure that is used to install Sealing.
Fig. 3 shows the internal structure of embodiment's middle shell 4 of the present utility model, draws together front protecting cavity 41, back-protective cavity 42 and central cavity 43.Wherein, front protecting cavity 41 is used to rabbet air inlet measuring unit 1, and be tightly connected with the intake manifold of motor, its top is provided with: the air-flow that communicates with intake temperature measuring unit 11 imports and exports 411, is used for intake temperature measuring unit 11 and gathers intake air temperature signals; Import and export the 411 suction pressure passages 412 that communicate with this air-flow, this suction pressure passage 412 is used for the suction pressure signal that suction pressure measuring unit 12 is gathered in the engine intake manifold.
Back-protective cavity 42 is used to rabbet measuring unit 2 in the cabin; its top is provided with air-flow and imports and exports 421; and by air-flow import and export 421 with engine compartment in communicate; temperature measurement unit 21 is imported and exported 421 by this air-flow and is gathered temperature signal in the cabin in the cabin; this back-protective cavity 42 also is provided with air-flow and imports and exports the 421 cabin internal pressure passages 422 that communicate, and is used for the pressure signal that cabin internal pressure measuring unit 22 is gathered in the cabin.
In a preferred embodiment, the opening of cabin internal pressure passage 421 is provided with dustproof construction.
In another was preferably implemented, the passage of temperature measurement unit 21 was provided with thermal-protective coating in the interlocking cabin.
Fig. 4 shows the principle of intake temperature measuring unit 11 among the embodiment of the present utility model, and intake temperature measuring unit 11 circuit comprise two-part: signal conversion bleeder circuit, capacitance-resistance filter circuit.Wherein:
The signal conversion bleeder circuit comprises negative tempperature coefficient thermistor R9 and resistance R 10, at first records the temperature variation signal by negative tempperature coefficient thermistor R9, by the signal conversion bleeder circuit this temperature variation signal conversion is become electrical signal then.
The capacitance-resistance filter circuit comprises resistance R 11 and capacitor C 1, and its electrical signal to the transmission of signal conversion bleeder circuit carries out filtering, and the filtering high-frequency interferencing signal guarantees to accurately measure temperature, exports integrated control unit 3 to by the F end then.
Fig. 5 shows the principle of suction pressure measuring unit 12 among the embodiment of the present utility model, suction pressure measuring unit 12 is provided with the silicon 121 that comprises the etching pressure-sensitive diaphragm, the pressure-sensitive diaphragm of this silicon is provided with four piezoresistance R5, R6, R7, the R8 that constitutes Wheatstone bridge, input end E is a constant current power supply, be out of shape under the pressure effect of pressure-sensitive diaphragm in intake manifold, piezoresistive effect changes resistance, but, export integrated control unit 3 to by the linear relationship of Wheatstone bridge effect build-up pressure and resistance.
Fig. 6 shows the principle of temperature measurement unit 21 in embodiment's middle deck of the present utility model, the temperature measurement unit circuit is provided with a thermistor R3 and constitutes other three resistance R 1, R2, the R4 of Wheatstone bridges with this resistance R 3, A and D are for introducing the input end of [constant, according to the Wheatstone bridge principle, can set up the voltage of output terminal B and C and the linear relationship of the temperature in the external world, export integrated control unit 3 to through output terminal B and C.
Thermistor R3 is the PT100 platinum resistor in a preferred embodiment.
In a preferred embodiment, temperature signal is handled through integrated control unit 3 in the measured cabin, is used for the temperature control system of motor, as the Control Parameter in temperature field in the engine compartment.
Fig. 7 shows the principle of measurement of embodiment's middle deck internal pressure measuring unit 22 of the present utility model, this cabin internal pressure measuring unit 22 is provided with single capacitor formula pressure transducer 221, this single capacitor formula pressure transducer 221 links to each other with integrated control unit 3, be provided with tensioning flat diaphragm 2211 and radius tip electrode 2212, atmospheric pressure directly acts on tensioning flat diaphragm 2211 by plasmas channel, these tensioning flat diaphragm 2211 compressive deformations, changed itself and radius tip electrode 2212 between spacing, thereby change the capacity of electric capacity and set up the cabin internal pressure and change linear relationship with capacitance, export electric weight between two electrodes to integrated control unit 3 by output terminal G and H, and export this electric weight to engine controller by pin I.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1, a kind of automobile-used temperature and pressure measuring device comprises the intake temperature that is used for the measured automobiles motor and the air inlet measuring unit of pressure signal, and coupled and be used to handle the integrated control unit of intake temperature and pressure signal, it is characterized in that, also comprises:
Link to each other with described integrated control unit and be used to gather measuring unit in the cabin of temperature and pressure signal in the engine compartment.
2, automobile-used temperature and pressure measuring device according to claim 1 is characterized in that measuring unit in the described cabin comprises:
Temperature measurement unit in the cabin links to each other with integrated control unit, measures the temperature of motor cabin atmosphere, collects temperature signal in the cabin;
Cabin internal pressure measuring unit links to each other with integrated control unit, measures the pressure of motor cabin atmosphere, collects cabin internal pressure signal.
3, automobile-used temperature and pressure measuring device according to claim 1 is characterized in that, described integrated control unit comprises:
The signal transmitting and receiving module receives intake temperature and pressure signal that described air inlet measuring unit sends, and temperature and pressure signal in the cabin that measuring unit sends in the described cabin, and sends into signal processing module, and the signal processing results of signal processing module is exported;
Signal processing module carries out signal analysis and processing to temperature and pressure signal in described intake temperature and pressure signal, the cabin.
4, according to the described automobile-used temperature and pressure measuring device of arbitrary claim in the claim 1 to 3, it is characterized in that also comprise housing, described housing comprises:
Be used to rabbet the air inlet measuring unit the front protecting cavity, be used to rabbet the back-protective cavity of measuring unit in the cabin and the central cavity that is used to rabbet integrated control unit.
5, automobile-used temperature and pressure measuring device according to claim 4 is characterized in that, described front protecting cavity and intake manifold are tightly connected, and described front protecting cavity top is provided with the air-flow that communicates with intake manifold and imports and exports.
6, automobile-used temperature and pressure measuring device according to claim 4 is characterized in that, described back-protective cavity top be provided with engine compartment in the air-flow that communicates import and export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820133104XU CN201321900Y (en) | 2008-08-29 | 2008-08-29 | Temperature and pressure measuring device for car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820133104XU CN201321900Y (en) | 2008-08-29 | 2008-08-29 | Temperature and pressure measuring device for car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201321900Y true CN201321900Y (en) | 2009-10-07 |
Family
ID=41159284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820133104XU Expired - Lifetime CN201321900Y (en) | 2008-08-29 | 2008-08-29 | Temperature and pressure measuring device for car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201321900Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914406A (en) * | 2012-10-12 | 2013-02-06 | 南昌工控电装有限公司 | Rapid calibration method and device for combined circuit board of manifold pressure sensors |
-
2008
- 2008-08-29 CN CNU200820133104XU patent/CN201321900Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914406A (en) * | 2012-10-12 | 2013-02-06 | 南昌工控电装有限公司 | Rapid calibration method and device for combined circuit board of manifold pressure sensors |
| CN102914406B (en) * | 2012-10-12 | 2014-09-10 | 南昌工控电装有限公司 | Rapid calibration method and device for combined circuit board of manifold pressure sensors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |