CN210768973U - Engine oil pressure temperature sensor fault simulation device - Google Patents
Engine oil pressure temperature sensor fault simulation device Download PDFInfo
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- CN210768973U CN210768973U CN201921630876.9U CN201921630876U CN210768973U CN 210768973 U CN210768973 U CN 210768973U CN 201921630876 U CN201921630876 U CN 201921630876U CN 210768973 U CN210768973 U CN 210768973U
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Abstract
The utility model provides an engine oil pressure temperature sensor trouble analogue means, including power module, single chip module, pulse fault setting module, circuit fault setting module, failure mode control module, signal input interface, signal mode control module and signal output interface. The utility model relates to an engine oil pressure temperature sensor trouble analogue means can simulate engine oil pressure temperature sensor PWM signal and circuit fault status signal, can satisfy the PVE test of engine oil pressure temperature sensor trouble, can freely switch over in pressure temperature sensor's actual signal state and analog signal state simultaneously, has effectively simplified experimental operation process, has reduceed manpower and time cost, has improved the PVE efficiency of software testing and the quality of engine oil pressure temperature sensor signal trouble.
Description
Technical Field
The utility model belongs to the technical field of the automotive test, especially, relate to an engine oil pressure temperature sensor fault simulation device.
Background
The engine oil pressure temperature sensor is widely applied to the field of automobiles and is used for detecting the engine oil pressure and the engine oil temperature of an engine in real time so as to ensure the normal work of the engine. Once the engine oil pressure is too low, the engine can cause strong friction due to lack of engine oil lubrication, so that the engine can be seriously worn and generate heat, the engine can be damaged, the engine oil pressure temperature sensor outputs an electric signal by using a pressure and thermistor temperature sensing technology, and the signal is collected by an automobile electronic control unit to realize the function of measuring the engine oil pressure and the engine oil temperature. As an electronic element, the fault types of the engine oil pressure and temperature sensor are mainly represented by signal discontinuity, signal loss, sensitivity reduction, incapability of accurately reflecting actual parameter values and the like, so that the ECU controls the engine to enter a limp home state, reduces the rotating speed of the engine, limits the output power of the engine and the like, and can be flameout to carry out self protection.
Therefore, the vehicle-mounted diagnosis system in the automobile electronic control unit can detect the working state and performance of the engine oil pressure and temperature sensor in real time and find out the faults of the engine oil pressure and temperature sensor in time. For example: if the engine oil pressure or the engine oil temperature exceeds or is lower than the specified numerical range, the vehicle-mounted diagnosis system confirms that the signal has a fault, sends out an alarm signal and lights a fault lamp on an instrument panel of a cab, so that a driver is reminded to pay attention to checking the state of the engine, and a corresponding fault code is generated in the system for a repairer to call for use.
According to the requirements of GB 18352.6-2016 "limit for light vehicle pollutant emission and measurement method (sixth stage of china)", vehicle manufacturers need to install an on-board diagnostic system on a vehicle to monitor emissions during actual operation of the motor vehicle, and require PVE testing of mass-produced vehicles on which the on-board diagnostic system is installed, mainly testing and verifying an OBD fault code of an automotive electronic control unit.
Under the condition of the prior art, the engine oil pressure temperature sensor outputs a Pulse Width Modulation (PWM) signal, the automobile electronic control unit receives the PWM signal, and meanwhile, the vehicle-mounted diagnosis system monitors the PWM signal and generates a corresponding on-board diagnostic (OBD) fault code. The conventional signal generator does not have a required PWM signal generating function, is expensive in equipment price and complex to use, and cannot meet related PVE test tests related to engine oil pressure and temperature sensor faults.
Disclosure of Invention
In view of this, the utility model aims at providing an engine oil pressure temperature sensor trouble analogue means, the cooperation uses power module, single-chip microcomputer module, pulse fault sets for the module, circuit fault sets for module and failure mode control module, can simulate engine oil pressure temperature sensor PWM signal and circuit fault status signal, can satisfy the PVE test of engine oil pressure temperature sensor trouble, can freely switch over in pressure temperature sensor's actual signal state and analog signal state simultaneously, the test operation process has effectively been simplified, manpower and time cost have been reduceed, the PVE efficiency of software testing and the quality of engine oil pressure temperature sensor signal trouble have been improved.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a fault simulation device for an engine oil pressure temperature sensor comprises a power supply module, a single chip microcomputer module, a pulse fault setting module, a circuit fault setting module, a fault mode control module, a signal input interface, a signal mode control module and a signal output interface;
the power supply module supplies power to the singlechip module; the pulse fault setting module outputs voltage signals to different ADC acquisition channels of the single chip microcomputer module; the single chip microcomputer module outputs corresponding PWM signals to a pulse signal interface of the fault mode control module according to different voltage input ADC acquisition channels; the circuit fault setting module selects and outputs one of an open-circuit signal, a ground short-circuit signal and a 5V power supply short-circuit signal to a circuit signal interface of the fault mode control module; the fault mode control module selects one of a pulse signal or a circuit signal to output to an analog signal input end of the signal mode control module, an output signal of the engine oil pressure and temperature sensor is input to an actual signal input end of the signal mode control module through a signal input interface, and the signal mode control module selects one of the analog signal or the actual signal to be connected with an automobile electronic control unit through a signal output interface.
Furthermore, the power module is an XL6019 adjustable boosting power module, 9-36V direct current power is input into the XL6019 adjustable boosting power module, and 12V direct current is output by the XL6019 adjustable boosting power module and is connected with a VCC interface of the single chip microcomputer module.
Furthermore, the single chip microcomputer module is an ATmega32u4 type single chip microcomputer, the pulse fault setting module is a seven-gear rotary type band switch, the seven-gear rotary type band switch is correspondingly grounded and has 5V voltage, and contacts of the seven-gear rotary type band switch are correspondingly connected with a PF0/ADC0 pin, a PF1/ADC1 pin, a PF4/ADC4 pin, a PF5/ADC5 pin, a PF6/ADC6 pin, a PF7/ADC7 pin and a PD4/ADC8 pin of the ATmega32u4 type single chip microcomputer respectively.
Furthermore, the circuit fault setting module is a three-gear rotary band switch, and the fault mode control module is a first two-gear toggle switch; three contacts of the three-gear rotary type waveband switch are respectively connected with an open circuit, a ground and 5V voltage; the output of the three-gear rotary waveband switch is connected with a circuit input contact of a first two-gear toggle switch, and a PD0/PWM pin of an ATmega32u4 model single chip microcomputer is connected with a pulse input contact of the first two-gear toggle switch; the signal mode control module is a second two-gear toggle switch; the output of the first two-gear toggle switch is connected with the analog signal contact of the second two-gear toggle switch, the output signal of the engine oil pressure temperature sensor is connected with the actual signal contact of the second two-gear toggle switch through the signal input interface, and the output of the second two-gear toggle switch is connected with the automobile electric control unit through the signal output interface.
Compared with the prior art, the utility model relates to an engine oil pressure temperature sensor fault simulation device has following advantage:
the utility model relates to an engine oil pressure temperature sensor trouble analogue means, power module is used in the cooperation, single-chip module, pulse fault sets for the module, circuit fault sets for module and failure mode control module, can simulate engine oil pressure temperature sensor PWM signal and circuit fault status signal, can satisfy the PVE test of engine oil pressure temperature sensor trouble, can freely switch over in pressure temperature sensor's actual signal state and analog signal state simultaneously, the test operation process has effectively been simplified, manpower and time cost have been reduceed, the PVE efficiency of software testing and the quality of engine oil pressure temperature sensor signal trouble have been improved.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
In the drawings:
fig. 1 is a schematic diagram of a fault simulation device for an engine oil pressure and temperature sensor according to an embodiment of the present invention;
fig. 2 is the embodiment of the utility model provides an engine oil pressure temperature sensor trouble analogue means circuit schematic.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-2, a fault simulation device for an engine oil pressure temperature sensor comprises a power supply module, a single chip microcomputer module, a pulse fault setting module, a circuit fault setting module, a fault mode control module, a signal input interface, a signal mode control module and a signal output interface;
the power supply module supplies power to the singlechip module; the pulse fault setting module outputs voltage signals to different ADC acquisition channels of the single chip microcomputer module; the single chip microcomputer module outputs corresponding PWM signals to a pulse signal interface of the fault mode control module according to different voltage input ADC acquisition channels; the circuit fault setting module selects and outputs one of an open-circuit signal, a ground short-circuit signal and a 5V power supply short-circuit signal to a circuit signal interface of the fault mode control module; the fault mode control module selects one of a pulse signal or a circuit signal to output to an analog signal input end of the signal mode control module, an output signal of the engine oil pressure and temperature sensor is input to an actual signal input end of the signal mode control module through a signal input interface, and the signal mode control module selects one of the analog signal or the actual signal to be connected with an automobile electronic control unit through a signal output interface.
As shown in fig. 1-2, the power module is an XL6019 adjustable boost power module, the XL6019 adjustable boost power module inputs 9-36V dc power, and the XL6019 adjustable boost power module outputs 12V dc to connect with a VCC interface of the single chip module.
As shown in fig. 1-2, the single chip microcomputer module is an ATmega32u4 type single chip microcomputer, the pulse fault setting module is a seven-gear rotary band switch, the seven-gear rotary band switch corresponds to ground and 5V voltage, and contacts of the seven-gear rotary band switch are respectively connected with a PF0/ADC0 pin, a PF1/ADC1 pin, a PF4/ADC4 pin, a PF5/ADC5 pin, a PF6/ADC6 pin, a PF7/ADC7 pin and a PD4/ADC8 pin of the ATmega32u4 type single chip microcomputer.
As shown in fig. 1-2, the circuit failure setting module is a three-gear rotary band switch, and the failure mode control module is a first two-gear toggle switch; three contacts of the three-gear rotary type waveband switch are respectively connected with an open circuit, a ground and 5V voltage; the output of the three-gear rotary waveband switch is connected with a circuit input contact of a first two-gear toggle switch, and a PD0/PWM pin of an ATmega32u4 model single chip microcomputer is connected with a pulse input contact of the first two-gear toggle switch; the signal mode control module is a second two-gear toggle switch; the output of the first two-gear toggle switch is connected with the analog signal contact of the second two-gear toggle switch, the output signal of the engine oil pressure temperature sensor is connected with the actual signal contact of the second two-gear toggle switch through the signal input interface, and the output of the second two-gear toggle switch is connected with the automobile electric control unit through the signal output interface.
The utility model discloses an in the practical application, under prior art condition, simulation engine oil pressure temperature sensor's PWM signal is divided into three fixed periodic signal: the first periodic signal is a high-level signal for synchronization and diagnosis, the second periodic signal is a high-level signal for engine oil temperature, the third periodic signal is a high-level signal for engine oil pressure, further, the ATmega32u4 type single chip microcomputer correspondingly generates seven different PWM signals according to the difference of the seven-gear rotary band switch of the pulse fault setting module and the input voltage analog signal to the ADC pin so as to simulate seven different pulse faults, and the three fixed periodic signal forming forms contained in the PWM signals corresponding to the seven pulse faults belong to the common knowledge in the prior art, have corresponding standards, and are preset and stored in the ATmega32u4 type single chip microcomputer according to the corresponding standards, and also belong to the conventional technical means in the field.
The seven-gear rotary band switch sets the pulse fault state to be 4, the sensor of the engine oil pressure temperature sensor is simulated to diagnose the hardware fault, and the PWM signal output by the ATmega32u4 model singlechip is as follows: the synchronization and diagnostic signal high level duration S1 is 0.640ms, the oil temperature signal high level duration T1 is 1.344ms, and the oil pressure signal high level duration T2 is 0.549 ms;
the seven-gear rotary band switch sets the pulse fault state to be fault 5, a sensor of an engine oil pressure temperature sensor is simulated to diagnose pressure measurement faults, and PWM signals output by an ATmega32u4 type single chip microcomputer are as follows: the synchronization and diagnostic signal high level duration S1 is 0.384ms, the oil temperature signal high level duration T1 is 1.344ms, and the oil pressure signal high level duration T2 is 0.549 ms;
the seven-gear rotary band switch sets the pulse fault state as fault 6, the sensor of the engine oil pressure temperature sensor is simulated to diagnose the temperature measurement fault, and the PWM signal output by the ATmega32u4 model singlechip is as follows: the synchronization and diagnostic signal high level duration S1 is 0.512ms, the oil temperature signal high level duration T1 is 1.344ms, and the oil pressure signal high level duration T2 is 0.549 ms;
the seven-gear rotary band switch sets the pulse fault state to be fault 7, the engine oil pressure of the engine oil pressure temperature sensor is simulated to be higher than the upper limit fault, and the PWM signals output by the ATmega32u4 type single chip microcomputer are as follows: the synchronization and diagnostic signal high level duration S1 is 0.256ms, the oil temperature signal high level duration T1 is 1.344ms, and the oil pressure signal high level duration T2 is 0.914 ms;
the seven-gear rotary band switch sets the pulse fault state to be fault 8, the engine oil pressure of the engine oil pressure temperature sensor is simulated to be lower than the lower limit fault, and the PWM signals output by the ATmega32u4 type single chip microcomputer are as follows: the synchronization and diagnostic signal high level duration S1 is 0.256ms, the oil temperature signal high level duration T1 is 1.344ms, and the oil pressure signal high level duration T2 is 0.366 ms;
the seven-gear rotary band switch sets the pulse fault state to be fault 9, the engine oil temperature of the engine oil pressure temperature sensor is simulated to be higher than the upper limit fault, and the PWM signals output by the ATmega32u4 type single chip microcomputer are as follows: the synchronization and diagnostic signal high level duration S1 is 0.256ms, the oil temperature signal high level duration T1 is 2.122ms, and the oil pressure signal high level duration T2 is 0.549 ms;
the seven-gear rotary band switch sets the pulse fault state as 10, the engine oil temperature of the engine oil pressure temperature sensor is simulated to be lower than the lower limit fault, and the PWM signals output by the ATmega32u4 type single chip microcomputer are as follows: the synchronization and diagnostic signal high level duration S1 is 0.256ms, the oil temperature signal high level duration T1 is 0.192ms, and the oil pressure signal high level duration T2 is 0.549 ms;
further, the three-gear rotary type wave band switch of the circuit fault setting module corresponds to: fault 1, simulating an open circuit of the engine oil pressure temperature sensor fault; fault 2, simulating short circuit to ground of the engine oil pressure temperature sensor fault; and 3, simulating a power supply short circuit of the engine oil pressure temperature sensor fault 3.
In the embodiment, the method is applied to SUV of sport utility vehicle. The automobile is a compact SUV, the automobile body structure is a 5-door 5-seat SUV, the fuel is 95 # gasoline, the engine displacement is 2.0L, the air inlet form is turbocharging, the air distribution mechanism is a double overhead camshaft and a double-valve timing adjustment mechanism, the oil supply mode is direct injection in a fuel cylinder, the gearbox is a 7-gear double-clutch gearbox, the maximum speed is 205km/h, the maximum power is 140kW, the maximum rotating speed is 4700r/min, the maximum torque is 300 N.m, and the maximum torque rotating speed is 1400 + 4000 r/min.
At first, break off engine oil pressure temperature sensor and car electrical unit's connecting wire harness, insert the utility model discloses an engine oil pressure temperature sensor trouble analogue means, through signal input interface connection engine oil pressure temperature sensor, rethread signal output interface connection car electrical unit, at last at car electrical unit interface connection Germany RA consultation finial's OBD scanning Tool Silver Scan-Tool for detect car trouble code.
After an automobile engine is started, the automobile engine is in an idling state, when the fault mode control module is set to be in a circuit fault mode, the signal mode control module is set to be in a simulation mode, a three-gear rotary type waveband switch knob is adjusted to be in a fault 1, and an OBD scanning tool detects a fault code P055A and indicates a sensor signal open-circuit fault; adjusting a three-gear rotary waveband switch knob to a fault 2, detecting a fault code P055C by an OBD scanning tool, and indicating that a sensor signal is in short circuit with the ground; adjust three gear rotation type wave band switch knobs to trouble 3, the OBD scanning tool detects out trouble code P055D, shows sensor signal to power short circuit trouble, the utility model discloses an engine oil pressure temperature sensor fault simulation device possesses good practical application effect.
After an automobile engine is started, the automobile engine is in an idling state, when a fault mode control module is set to be a pulse fault mode, a signal mode control module is set to be a simulation mode, a seven-gear rotary type waveband switch knob is adjusted to reach a fault 4, an OBD scanning tool detects a fault code P055B, and the fault code represents a sensor diagnosis hardware fault; adjusting a seven-gear rotary waveband switch knob to a fault 5, detecting a fault code P055F by an OBD scanning tool, and indicating that a sensor diagnoses a pressure measurement fault; adjusting a seven-gear rotary waveband switch knob to a fault 6, and detecting a fault code P1184 by an OBD scanning tool to indicate that a sensor diagnoses a temperature measurement fault; adjusting a seven-gear rotary type waveband switch knob to a fault of 7, and detecting a fault code P0521 by an OBD scanning tool to indicate that the oil pressure is higher than the upper limit fault; adjusting a seven-gear rotary type waveband switch knob to a fault 8, and detecting a fault code P0521 by an OBD scanning tool to indicate that the engine oil pressure is lower than a lower limit fault; adjusting a seven-gear rotary type waveband switch knob to a fault 9, and detecting a fault code P0196 by an OBD scanning tool to indicate that the temperature of engine oil is higher than the upper limit fault; adjust seven gears rotation type band switch knobs to trouble 10, OBD scanning tool detects out trouble code P0196, shows that the machine oil temperature is less than the lower limit trouble, the utility model discloses an engine oil pressure temperature sensor fault simulation device possesses good practical application effect.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an engine oil pressure temperature sensor trouble analogue means which characterized in that: the device comprises a power supply module, a singlechip module, a pulse fault setting module, a circuit fault setting module, a fault mode control module, a signal input interface, a signal mode control module and a signal output interface;
the power supply module supplies power to the singlechip module; the pulse fault setting module outputs voltage signals to different ADC acquisition channels of the single chip microcomputer module; the single chip microcomputer module outputs corresponding PWM signals to a pulse signal interface of the fault mode control module according to different voltage input ADC acquisition channels; the circuit fault setting module selects and outputs one of an open-circuit signal, a ground short-circuit signal and a 5V power supply short-circuit signal to a circuit signal interface of the fault mode control module; the fault mode control module selects one of a pulse signal or a circuit signal to be output to an analog signal input end of the signal mode control module, an output signal of an engine oil pressure and temperature sensor is input to an actual signal input end of the signal mode control module through a signal input interface, and the signal mode control module selects one of an analog signal or an actual signal to be connected with an automobile electronic control unit through the signal output interface.
2. The engine oil pressure temperature sensor fault simulator of claim 1, wherein: the power module is an XL6019 adjustable boosting power module, 9-36V direct-current power is input into the XL6019 adjustable boosting power module, and 12V direct current is output by the XL6019 adjustable boosting power module and is connected with a VCC interface of the single chip microcomputer module.
3. The engine oil pressure temperature sensor fault simulator of claim 1, wherein: the single chip microcomputer module is an ATmega32u4 type single chip microcomputer, the pulse fault setting module is a seven-gear rotary type band switch, the seven-gear rotary type band switch is correspondingly grounded and has 5V voltage, and contacts of the seven-gear rotary type band switch are correspondingly connected with a PF0/ADC0 pin, a PF1/ADC1 pin, a PF4/ADC4 pin, a PF5/ADC5 pin, a PF6/ADC6 pin, a PF7/ADC7 pin and a PD4/ADC8 pin of the ATmega32u4 type single chip microcomputer respectively.
4. The engine oil pressure temperature sensor fault simulator of claim 3, wherein: the circuit fault setting module is a three-gear rotary type waveband switch, and the fault mode control module is a first two-gear toggle switch; three contacts of the three-gear rotary type waveband switch are respectively connected with an open circuit, a ground and a 5V voltage; the output of the three-gear rotary waveband switch is connected with a circuit input contact of the first two-gear toggle switch, and a PD0/PWM pin of the ATmega32u4 model single chip microcomputer is connected with a pulse input contact of the first two-gear toggle switch; the signal mode control module is a second two-gear toggle switch; the output of the first two-gear toggle switch is connected with the analog signal contact of the second two-gear toggle switch, the output signal of the engine oil pressure and temperature sensor is connected with the actual signal contact of the second two-gear toggle switch through the signal input interface, and the output of the second two-gear toggle switch is connected with the automobile electric control unit through the signal output interface.
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| CN201921630876.9U CN210768973U (en) | 2019-09-27 | 2019-09-27 | Engine oil pressure temperature sensor fault simulation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685772A (en) * | 2019-09-27 | 2020-01-14 | 中国汽车技术研究中心有限公司 | Engine oil pressure temperature sensor fault simulation device |
| CN112269088A (en) * | 2020-10-26 | 2021-01-26 | 东风汽车集团有限公司 | Engine PVE fault diagnosis test device and method |
-
2019
- 2019-09-27 CN CN201921630876.9U patent/CN210768973U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685772A (en) * | 2019-09-27 | 2020-01-14 | 中国汽车技术研究中心有限公司 | Engine oil pressure temperature sensor fault simulation device |
| CN110685772B (en) * | 2019-09-27 | 2024-05-07 | 中国汽车技术研究中心有限公司 | Fault simulation device for engine oil pressure and temperature sensor |
| CN112269088A (en) * | 2020-10-26 | 2021-01-26 | 东风汽车集团有限公司 | Engine PVE fault diagnosis test device and method |
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