CN107764478A - Portable direct-reading type Motronic control maps engine oil pressure pickup detector - Google Patents
Portable direct-reading type Motronic control maps engine oil pressure pickup detector Download PDFInfo
- Publication number
- CN107764478A CN107764478A CN201710805036.0A CN201710805036A CN107764478A CN 107764478 A CN107764478 A CN 107764478A CN 201710805036 A CN201710805036 A CN 201710805036A CN 107764478 A CN107764478 A CN 107764478A
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- China
- Prior art keywords
- oil pressure
- engine oil
- pressure pickup
- resistance
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/007—Malfunction diagnosis, i.e. diagnosing a sensor defect
Abstract
The present invention provides a kind of portable direct-reading type Motronic control maps engine oil pressure pickup detector, including：First signal receives line, for connecting the joint of overall wire sheaves, receives the voltage signal i.e. supply voltage signal inputted from overall wire sheaves to engine oil pressure pickup；First signal receives the connector that line one end is provided with connection overall wire sheaves；Secondary signal receives line, for connecting engine oil pressure pickup, receives the output voltage signal from engine oil pressure pickup；Secondary signal receives the connector that line one end is provided with connection sensor；Data processing and display centre, receive line with the first signal and secondary signal receives line and is connected respectively；Data processing and display centre are provided with the first display module and the second display module, are respectively used to show engine oil pressure pickup output voltage signal and supply voltage signal.The present invention is easy to carry, easy reading, to facilitate exclusion of the maintenance sites to oil pressure alarm failure.
Description
Technical field
The present invention relates to Motronic control maps Technology for Transducer Fault Detection field, especially a kind of portable direct-reading type engine
Electronics engine oil pressure sensor detecting instrument.
Background technology
Electronic information is the indispensable control system of automobile, and electronic sensor is the weight of electronic information control system
Part is wanted, the operation conditions for starting each system can be monitored in real time, provided for deviation adjusting and troubleshooting has in time
The data-signal of effect, provided strong support for engine reliable operation.
Electronic oil pressure sensor is engine oil pressure " sensory nerve ", can turn engine oil pressure signal
Electric signal is changed to, by relevant circuit by oil pressure information transmission to dial gauge and low-pressure alarming device, monitors engine oil pressure in real time
Information, ensure the safe operation for starting lubricating and cooling system.
On the performance judgment of engine oil pressure pickup, still without a kind of detecting instrument of portable direct-reading.Need to pull down machine
Oil pressure force snesor is detected to special testboard bay.
For maintenance sites, when there is oil pressure alarm, for investigation engine oil pressure pickup whether failure,
New engine oil pressure pickup can only be first changed, is further overhauled further according to whether oil pressure alarm failure eliminates, by
This necessarily leads to problems with：
1st, oil pressure alarm trouble hunting is complicated, has a strong impact on maintenance efficiency；
2nd, because scene is without special detection device, it is difficult to look for out of order immediate cause in time, easily cause failure erroneous judgement；
3rd, irrational new part that changes the outfit can cause maintenance cost to rise；
4th, basic reason can not exclude in time, easily cause customer's complaint.
In patent application " A of CN 103575467 ", there is the wire harness referred to for engine oil pressure pickup detection, but
Only wire harness, detection wire harness itself do not possess data sampling and processing, conversion and display function, it is necessary to be examined by universal meter
Survey, data stability is poor, and direct-reading is not strong, and wire harness connection-peg is complicated, and measurement result is had a great influence by personnel's technical capability.Still
The simple, portable, readable of engine oil pressure pickup detection is not implemented.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of portable direct-reading type Motronic control maps machine
Oil pressure sensor detecting instrument, it is simple to operate, be easy to carry, easy reading, to facilitate maintenance sites to oil pressure alarm failure
Exclusion.The technical solution adopted by the present invention is：
A kind of portable direct-reading type Motronic control maps engine oil pressure pickup detector, including：
First signal receives line, for connecting the joint of overall wire sheaves, receives defeated to engine oil pressure pickup from overall wire sheaves
The voltage signal entered i.e. supply voltage signal；First signal receives the connector that line one end is provided with connection overall wire sheaves；
Secondary signal receives line, for connecting engine oil pressure pickup, receives the output voltage letter from engine oil pressure pickup
Number；Secondary signal receives the connector that line one end is provided with connection sensor；
Data processing and display centre, receive line with the first signal and secondary signal receives line and is connected respectively；Data processing and aobvious
Show that center is provided with the first display module and the second display module, be respectively used to show engine oil pressure pickup output voltage signal
With supply voltage signal.
Further, data processing and display centre are included at power circuit, simulated modulation circuit, analog-to-digital conversion and data
Manage circuit, display circuit；
Power circuit receives line from the first signal and obtains supply voltage, and is supplied to the microprocessor in data processing and display centre
Device U1 inputs as supply voltage signal；After power circuit also carries out lowering and stabilizing blood pressure processing to supply voltage, for being adjusted to simulation
Manage circuit, analog-to-digital conversion and data processing circuit, display circuit power supply；
Simulated modulation circuit receives line from secondary signal and obtains engine oil pressure pickup output voltage signal, for the machine to input
Oil pressure sensor output voltage signal carries out Hyblid Buffer Amplifier, the microprocessor being provided in data processing and display centre
U1 inputs as engine oil pressure pickup output voltage signal；
Analog-to-digital conversion and data processing circuit are used to believe the engine oil pressure pickup output voltage signal and supply voltage of input
Number sampled respectively, and carry out analog-to-digital conversion, then export the first display module into display circuit and second aobvious respectively
Show that module is shown.
Specifically, power circuit include transient voltage killer tube TVS, electric capacity C1, C2, C3, regulator block U5, electric capacity C4, C5,
C6, C7, inductance L1, L2, resistance R1, R2, electric capacity C8；
Supply voltage meets transient voltage killer tube TVS one end, electric capacity C1, C2, C3 one end, resistance R1 one end and regulator block U5
Input；The transient voltage killer tube TVS other ends, electric capacity C1, C2, C3 other end, regulator block U5 earth terminal are grounded；
One end, inductance L1 one end of regulator block U5 output termination capacitor C4, C5；The one of inductance L1 another termination capacitor C6, C7
End, and output voltage VCC1；Electric capacity C4, C5, C6, C7 other end are grounded and inductance L2 one end；The inductance L2 other end
Ground connection；Resistance R1 another terminating resistor R2 one end, electric capacity C8 one end, and connect a microprocessor U1 input；
Resistance R2 and electric capacity the C8 other end are grounded.
Specifically, simulated modulation circuit includes resistance R10, R8, electric capacity C17, operational amplifier U2a, U2b, U2c, resistance
R4、R5、R6；
Engine oil pressure pickup output voltage signal connecting resistance R10 one end, resistance R10 another terminating resistor R8 one end and fortune
Calculate amplifier U2a in-phase input end, resistance R8 other end ground connection；Electric capacity C17 is connected in parallel on resistance R8 both ends；Operational amplifier
U2a anti-phase input termination output end；Operational amplifier U2a output end connects operational amplifier U2b same phase by resistance R6
Input is simultaneously grounded by resistance R5；Operational amplifier U2b output end connects inverting input by resistance R3；Operational amplifier
U2b inverting input connects operational amplifier U2c output end, operational amplifier U2c homophase input termination by resistance R4
Ground, anti-phase input termination output end；Operational amplifier U2b output termination microprocessor U1 another input.
Specifically, analog-to-digital conversion and data processing circuit include microprocessor U1, reference voltage circuit；Reference voltage circuit
A reference voltage is provided for the AD analog-digital converters inside microprocessor U1；The reference voltage that reference voltage circuit provides connects micro-
A processor U1 benchmark input end；
Reference voltage circuit includes resistance R7, electric capacity C12, C13, reference voltage chip U4；Voltage VCC1 connecting resistances R7 one end
With electric capacity C13 one end；Electric capacity C13 other end ground connection；Resistance R7 another termination reference voltage chip U4 negative electrode, benchmark
Voltage chips U4 plus earth, a microprocessor U1 benchmark input end is connect with reference to pole, and is grounded by electric capacity C12；
Microprocessor U1 display interface connects display circuit.
Specifically, display circuit includes display driver chip U3, the first display module and the second display module；
Microprocessor U1 display interface meets display driver chip U3, and display driver chip U3 output port connects first and shown respectively
Show module and the second display module.
More preferably, microprocessor U1 is to engine oil pressure pickup output voltage signal and before supply voltage signal current time
Sampled value in one setting period carries out mean value calculation processing, then exports again.
The advantage of the invention is that：
1）Realize timely detection of the engine oil pressure pickup in maintenance sites；The method for simplifying engine oil pressure pickup detection
And flow；
2）Supply voltage signal and engine oil pressure pickup output voltage signal can directly be read；Possess data display function,
So that engine oil pressure pickup detection need not be again by test-bed and other instrument；
3）In circuit design, the filtering to interference signal is taken into full account, registration is accurately, stably；
4）The elimination ability of oil pressure alarm failure is significantly improved, improves the detection efficiency of engine oil pressure pickup, is dropped
The low False Rate of oil pressure alarm failure.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the electrical schematic diagram of the present invention.
Fig. 3 is the simulated modulation circuit theory diagrams of the present invention.
Embodiment
With reference to specific drawings and examples, the invention will be further described.
The present invention provides a kind of portable direct-reading type Motronic control maps engine oil pressure pickup detector, hereinafter referred to as sensor
Detector；Sensor herein, refer in particular to electronics engine oil pressure pickup；
As shown in Figure 1 and Figure 2, the sensor detecting instrument includes：
First signal receives line 1, for connecting the joint of overall wire sheaves, receives defeated to engine oil pressure pickup from overall wire sheaves
The voltage signal entered i.e. supply voltage signal；First signal receives the connector that the one end of line 1 is provided with connection overall wire sheaves；Oil pressure
The power supply of force snesor comes from the first signal and receives the overall wire sheaves that line 1 connects；
Secondary signal receives line 2, for connecting engine oil pressure pickup, receives the output voltage letter from engine oil pressure pickup
Number；Secondary signal receives the connector that the one end of line 2 is provided with connection sensor；
Data processing and display centre 3, receive line 1 with the first signal and secondary signal receives line 2 and is connected respectively；Data processing and
Display centre 3 is provided with the first display module and the second display module, is respectively used to show engine oil pressure pickup output voltage
Signal and supply voltage signal；
Specifically, as shown in Figure 2；
Data processing and display centre 3 include power circuit, simulated modulation circuit, analog-to-digital conversion and data processing circuit, display
Circuit；
（One）Power circuit；
Power circuit receives line 1 from the first signal and obtains supply voltage, and is supplied to micro- place in data processing and display centre 3
Device U1 is managed to input as supply voltage signal；After power circuit also carries out lowering and stabilizing blood pressure processing to supply voltage, for simulation
Modulate circuit, analog-to-digital conversion and data processing circuit, display circuit power supply；
Power circuit includes transient voltage killer tube TVS, electric capacity C1, C2, C3, regulator block U5, electric capacity C4, C5, C6, C7, inductance
L1, L2, resistance R1, R2, electric capacity C8；
Supply voltage meets transient voltage killer tube TVS one end, electric capacity C1, C2, C3 one end, resistance R1 one end and regulator block U5
Input；The transient voltage killer tube TVS other ends, electric capacity C1, C2, C3 other end, regulator block U5 earth terminal are grounded；
One end, inductance L1 one end of regulator block U5 output termination capacitor C4, C5；The one of inductance L1 another termination capacitor C6, C7
End, and output voltage VCC1；Electric capacity C4, C5, C6, C7 other end are grounded and inductance L2 one end；The inductance L2 other end
Ground connection；Resistance R1 another terminating resistor R2 one end, electric capacity C8 one end, and connect a microprocessor U1 input；
Resistance R2 and electric capacity the C8 other end are grounded；
（Two）Simulated modulation circuit；
Simulated modulation circuit receives line 2 from secondary signal and obtains engine oil pressure pickup output voltage signal, for input
Engine oil pressure pickup output voltage signal carries out Hyblid Buffer Amplifier, the micro- place being provided in data processing and display centre 3
Device U1 is managed to input as engine oil pressure pickup output voltage signal；
U2 is a piece of four high guaily unit integrated circuit SGM8584 in Fig. 2, is constructed with three operational amplifiers therein and peripheral distance
One instrument amplifier, for carrying out Hyblid Buffer Amplifier to the sensor signal of outside input；Resistance R8 and R10 form divider,
Sensor output voltage signal is subjected to half partial pressure, to protect subsequent conditioning circuit；Electric capacity C17 plays the sensor output to input
Voltage signal filter action；Fig. 3 is the principle of instrument amplifier；
Simulated modulation circuit includes resistance R10, R8, electric capacity C17, operational amplifier U2a, U2b, U2c, resistance R4, R5, R6；
Engine oil pressure pickup output voltage signal connecting resistance R10 one end, resistance R10 another terminating resistor R8 one end and fortune
Calculate amplifier U2a in-phase input end, resistance R8 other end ground connection；Electric capacity C17 is connected in parallel on resistance R8 both ends；Operational amplifier
U2a anti-phase input termination output end；Operational amplifier U2a output end connects operational amplifier U2b same phase by resistance R6
Input is simultaneously grounded by resistance R5；Operational amplifier U2b output end connects inverting input by resistance R3；Operational amplifier
U2b inverting input connects operational amplifier U2c output end, operational amplifier U2c homophase input termination by resistance R4
Ground, anti-phase input termination output end；Operational amplifier U2b output termination microprocessor U1 another input；
（Three）Analog-to-digital conversion and data processing circuit；
Analog-to-digital conversion and data processing circuit are used to believe the engine oil pressure pickup output voltage signal and supply voltage of input
Number sampled respectively, and carry out analog-to-digital conversion, then export the first display module into display circuit and second aobvious respectively
Show that module is shown；
Analog-to-digital conversion and data processing circuit include microprocessor U1, reference voltage circuit；U1 uses STC15W408AS；
Reference voltage circuit provides a reference voltage for the AD analog-digital converters inside microprocessor U1；Reference voltage circuit carries
The reference voltage of confession connects a microprocessor U1 benchmark input end；
Reference voltage circuit includes resistance R7, electric capacity C12, C13, reference voltage chip U4；U4 uses TL431；
Voltage VCC1 connecting resistances R7 one end and electric capacity C13 one end；Electric capacity C13 other end ground connection；The resistance R7 other end
Connect reference voltage chip U4 negative electrode, reference voltage chip U4 plus earth, a microprocessor U1 benchmark is connect with reference to pole
Input, and be grounded by electric capacity C12；
Microprocessor U1 the 2nd pin and the 20th pin connect respectively engine oil pressure pickup output voltage signal and overall wire sheaves to machine
The voltage signal of oil pressure force snesor input is supply voltage signal；
Microprocessor U1 display interface connects display circuit；
Because the voltage signal that overall wire sheaves input to engine oil pressure pickup is supply voltage signal, engine oil pressure pickup is defeated
Go out voltage signal and there may be instantaneous fluctuation, in order that the voltage data that must be shown is more steady, microprocessor U1 can be to this
Sampled value in the previous setting period at two signal current times carries out mean value calculation processing, is fluctuated in trap signal excessive
Interference so that data show more steady；
（Four）Display circuit；
Display circuit includes display driver chip U3 and two LED displays LED1, LED2；Display screen LED1, LED2 make respectively
For the first display module and the second display module；
Microprocessor U1 display interface meets display driver chip U3, and display driver chip U3 output port connects first and shown respectively
Show module and the second display module；
During detection, carry out in the steps below：
1st, the wiring harness connector that vehicle is connected to engine oil pressure pickup is extracted, and the connection of line 1 is received with the first signal of detector
Head connection, vehicle power supply is opened, display screen LED2 shows supply voltage, is investigated as follows according to voltage：
1. if display screen LED2 voltage not in the range of 4.8V~6.5v, illustrates ECU or wire harness abnormal electrical power supply, it is necessary to first investigate
Wire harness or ECU failures.
If 2. display screen LED2 in the range of 4.8V~6.5v, illustrate that ECU and wire harness power supply are normal, secondary signal connect
The connector connection engine oil pressure pickup of take-up 2, display screen LED1 show the magnitude of voltage under sensor current oil pressure state, if
Voltage is not in the range of 0.3V~0.7v, then engine oil pressure pickup failure.
2nd, after determining that ECU and wire harness power supply are normal, engine is started, if display screen LED2 indicating values are in 4.8V~6.5v scopes
Interior, display screen LED1 indicating values are in the range of 1.2V~4.6v, then engine oil pressure pickup is normal；If display screen LED1, LED2 show
Show exception, then engine oil pressure pickup failure.
Claims (7)
- A kind of 1. portable direct-reading type Motronic control maps engine oil pressure pickup detector, it is characterised in that including：First signal receives line (1), for connecting the joint of overall wire sheaves, receives from overall wire sheaves to engine oil pressure pickup The voltage signal of input is supply voltage signal；Secondary signal receives line (2), for connecting engine oil pressure pickup, receives the output voltage from engine oil pressure pickup Signal；Data processing and display centre (3), receive line (1) with the first signal and secondary signal receives line (2) and is connected respectively；Data Processing and display centre (3) are provided with the first display module and the second display module, are respectively used to show engine oil pressure pickup Output voltage signal and supply voltage signal.
- 2. portable direct-reading type Motronic control maps engine oil pressure pickup detector as claimed in claim 1, it is characterised in thatData processing and display centre (3) include power circuit, simulated modulation circuit, analog-to-digital conversion and data processing circuit, shown Show circuit；Power circuit receives line (1) from the first signal and obtains supply voltage, and is supplied in data processing and display centre (3) Microprocessor U1 inputs as supply voltage signal；Power circuit also to supply voltage carry out lowering and stabilizing blood pressure processing after, for Simulated modulation circuit, analog-to-digital conversion and data processing circuit, display circuit power supply；Simulated modulation circuit receives line (2) from secondary signal and obtains engine oil pressure pickup output voltage signal, for input Engine oil pressure pickup output voltage signal carry out Hyblid Buffer Amplifier, be provided in data processing and display centre (3) Microprocessor U1 inputs as engine oil pressure pickup output voltage signal；Analog-to-digital conversion and data processing circuit are used to believe the engine oil pressure pickup output voltage signal and supply voltage of input Number sampled respectively, and carry out analog-to-digital conversion, then export the first display module into display circuit and second aobvious respectively Show that module is shown.
- 3. portable direct-reading type Motronic control maps engine oil pressure pickup detector as claimed in claim 2, it is characterised in thatPower circuit includes transient voltage killer tube TVS, electric capacity C1, C2, C3, regulator block U5, electric capacity C4, C5, C6, C7, inductance L1, L2, resistance R1, R2, electric capacity C8；Supply voltage meets transient voltage killer tube TVS one end, electric capacity C1, C2, C3 one end, resistance R1 one end and regulator block U5 Input；The transient voltage killer tube TVS other ends, electric capacity C1, C2, C3 other end, regulator block U5 earth terminal are grounded； One end, inductance L1 one end of regulator block U5 output termination capacitor C4, C5；The one of inductance L1 another termination capacitor C6, C7 End, and output voltage VCC1；Electric capacity C4, C5, C6, C7 other end are grounded and inductance L2 one end；The inductance L2 other end Ground connection；Resistance R1 another terminating resistor R2 one end, electric capacity C8 one end, and connect a microprocessor U1 input； Resistance R2 and electric capacity the C8 other end are grounded.
- 4. portable direct-reading type Motronic control maps engine oil pressure pickup detector as claimed in claim 2, it is characterised in thatSimulated modulation circuit includes resistance R10, R8, electric capacity C17, operational amplifier U2a, U2b, U2c, resistance R4, R5, R6；Engine oil pressure pickup output voltage signal connecting resistance R10 one end, resistance R10 another terminating resistor R8 one end and fortune Calculate amplifier U2a in-phase input end, resistance R8 other end ground connection；Electric capacity C17 is connected in parallel on resistance R8 both ends；Operational amplifier U2a anti-phase input termination output end；Operational amplifier U2a output end connects operational amplifier U2b same phase by resistance R6 Input is simultaneously grounded by resistance R5；Operational amplifier U2b output end connects inverting input by resistance R3；Operational amplifier U2b inverting input connects operational amplifier U2c output end, operational amplifier U2c homophase input termination by resistance R4 Ground, anti-phase input termination output end；Operational amplifier U2b output termination microprocessor U1 another input.
- 5. portable direct-reading type Motronic control maps engine oil pressure pickup detector as claimed in claim 2, it is characterised in thatAnalog-to-digital conversion and data processing circuit include microprocessor U1, reference voltage circuit；Reference voltage circuit is microprocessor AD analog-digital converters inside U1 provide a reference voltage；The reference voltage that reference voltage circuit provides connects microprocessor U1's One benchmark input end；Reference voltage circuit includes resistance R7, electric capacity C12, C13, reference voltage chip U4；Voltage VCC1 connecting resistances R7 one end With electric capacity C13 one end；Electric capacity C13 other end ground connection；Resistance R7 another termination reference voltage chip U4 negative electrode, benchmark Voltage chips U4 plus earth, a microprocessor U1 benchmark input end is connect with reference to pole, and is grounded by electric capacity C12；Microprocessor U1 display interface connects display circuit.
- 6. portable direct-reading type Motronic control maps engine oil pressure pickup detector as claimed in claim 2, it is characterised in thatDisplay circuit includes display driver chip U3, the first display module and the second display module；Microprocessor U1 display interface meets display driver chip U3, and display driver chip U3 output port connects first and shown respectively Show module and the second display module.
- 7. portable direct-reading type Motronic control maps engine oil pressure pickup detector as claimed in claim 2, it is characterised in thatWhen microprocessor U1 is to engine oil pressure pickup output voltage signal and the previous setting of supply voltage signal current time Sampled value in section carries out mean value calculation processing, then exports again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805036.0A CN107764478A (en) | 2017-09-08 | 2017-09-08 | Portable direct-reading type Motronic control maps engine oil pressure pickup detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805036.0A CN107764478A (en) | 2017-09-08 | 2017-09-08 | Portable direct-reading type Motronic control maps engine oil pressure pickup detector |
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| CN107764478A true CN107764478A (en) | 2018-03-06 |
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| CN201710805036.0A Pending CN107764478A (en) | 2017-09-08 | 2017-09-08 | Portable direct-reading type Motronic control maps engine oil pressure pickup detector |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11218457A (en) * | 1998-01-30 | 1999-08-10 | Mazda Motor Corp | Failure detector for fuel tank internal pressure sensor |
| CN201748998U (en) * | 2010-11-02 | 2011-02-16 | 重庆康明斯发动机有限公司 | Field detector for voltage sensor |
| CN103575467A (en) * | 2013-10-12 | 2014-02-12 | 广西玉柴机器股份有限公司 | Detection harness for electronic oil pressure sensor of engine |
| CN204142271U (en) * | 2014-08-16 | 2015-02-04 | 潍柴动力股份有限公司 | A kind of sensor malfunction diagnostic device |
| CN204614312U (en) * | 2015-02-11 | 2015-09-02 | 张宗梅 | A kind of relay analog module of simulated automotive fault |
| CN205374644U (en) * | 2015-11-11 | 2016-07-06 | 潍柴动力股份有限公司 | Diagnostic tool is restrainted to sensor and whole fare |
| CN205748471U (en) * | 2016-05-26 | 2016-11-30 | 温岭伯利亚环保科技有限公司 | Failure diagnostic apparatus |
-
2017
- 2017-09-08 CN CN201710805036.0A patent/CN107764478A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11218457A (en) * | 1998-01-30 | 1999-08-10 | Mazda Motor Corp | Failure detector for fuel tank internal pressure sensor |
| CN201748998U (en) * | 2010-11-02 | 2011-02-16 | 重庆康明斯发动机有限公司 | Field detector for voltage sensor |
| CN103575467A (en) * | 2013-10-12 | 2014-02-12 | 广西玉柴机器股份有限公司 | Detection harness for electronic oil pressure sensor of engine |
| CN204142271U (en) * | 2014-08-16 | 2015-02-04 | 潍柴动力股份有限公司 | A kind of sensor malfunction diagnostic device |
| CN204614312U (en) * | 2015-02-11 | 2015-09-02 | 张宗梅 | A kind of relay analog module of simulated automotive fault |
| CN205374644U (en) * | 2015-11-11 | 2016-07-06 | 潍柴动力股份有限公司 | Diagnostic tool is restrainted to sensor and whole fare |
| CN205748471U (en) * | 2016-05-26 | 2016-11-30 | 温岭伯利亚环保科技有限公司 | Failure diagnostic apparatus |
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Application publication date: 20180306 |