CN106014633A - Engine system part diagnosis toolbox and diagnosis detection method - Google Patents

Engine system part diagnosis toolbox and diagnosis detection method Download PDF

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Publication number
CN106014633A
CN106014633A CN201610344134.4A CN201610344134A CN106014633A CN 106014633 A CN106014633 A CN 106014633A CN 201610344134 A CN201610344134 A CN 201610344134A CN 106014633 A CN106014633 A CN 106014633A
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China
Prior art keywords
host computer
case
workbox
fastening
electrical interface
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CN201610344134.4A
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CN106014633B (en
Inventor
曹志伟
徐刚
邓海俨
唐潜
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FAW Group Corp
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FAW Group Corp
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Publication of CN106014633B publication Critical patent/CN106014633B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00Component parts, details or accessories, not otherwise provided for
    • F02B77/08Safety, indicating or supervising devices
    • F02B77/083Safety, indicating or supervising devices relating to maintenance, e.g. diagnostic device

Abstract

The invention provides an engine system part diagnosis toolbox. The engine system part diagnosis toolbox comprises a toolbox body X. A main panel of the toolbox body X is provided with a storage region, a power supply selection region, a fuse and part connecting region and a gas supply and adjustment connecting region. The toolbox body X contains an ECM. A storage battery connecting port, an AC connecting port, a power supply switch K1, a storage battery power supply indicator light L1, an AC power supply indicator light L2, a main switch SW1 and a main switch indicator light L3 are arranged in the power supply selection region. A fuse holder and electrical interfaces P1, P2, P3, P4, P5, P6, P7, P8 and P9 are included in the fuse and part connecting region. A compressed gas inlet G1, a detection gas outlet G2, a detection gas inlet G3, a gas outlet valve V1, a pressure regulation valve S1, a first pressure meter PA1 and a second pressure meter PA2 are arranged in the gas supply and adjustment connecting region. The engine system part diagnosis toolbox can be used for assisting in judging part failures of an engine electronic control system rapidly and accurately.

Description

Engine system parts diagnostic tool case and diagnosis detecting method
Technical field
The present invention relates to vehicle detection maintenance field, especially a kind of spark-ignition engine Measuring error instrument.
Background technology
Spark-ignition engine comprises the various engines such as gasoline engine and natural gas engine, due to natural gas engine commercial car field Preliminary Applications at home, for relative and conventional Diesel engine, natural gas engine control system integration degree is high, and the application of automatically controlled parts is more.During use and maintenance, the fault of appearance is relative complex, and general maintainer is difficult to failure judgement reason.
At present, the maintenance for natural gas engine fault judges, is all to be judged by diagnostic apparatus.But general simple fault only can be judged by diagnostic apparatus, it is difficult to failure judgement place to common mechanical fault with without sensor parts.
There are the following problems for existing engine diagnosis:
1) fault diagnosis is inaccurate, and misdiagnosis rate is too high;
2) dispersion of each parts, easily omits trouble point;
3) there is no specific purpose tool, during diagnosis and repair, easily cause parts secondary damage;
4) sync check while electric-controlled parts and mechanical part can not be realized.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of engine system parts diagnostic tool case, can quick and precisely judge engine electric-controlled system component failure, it is possible to provide a kind of unified criterion for fault diagnosis, it is achieved the synchronization diagnosis of electric-controlled parts and mechanical part;For general maintainer, this instrument can be grasped with Fast Learning.The technical solution used in the present invention is:
A kind of engine system parts diagnostic tool case, including workbox X, is provided with storage area, power supply selection district, insurance and parts bonding pad on the main panel of workbox X, supplies and regulate bonding pad;Workbox X contains ECM(central controller);
Power supply selects district to be provided with accumulator connectivity port, alternating current connectivity port, power switching switch K1, storage battery power supply display lamp L1, Alternating Current Power Supply display lamp L2, master switch SW1, master switch display lamp L3;
Insurance and parts bonding pad include Insurance Block and electrical interface P1, P2, P3, P4, P5, P6, P7, P8, P9, respectively as ignition coil interface, waste gas venting control valve interface, exhaust gas oxygen sensor interface, automatically controlled pressure regulator interface, host computer interface, atmospheric environment sensor interface, electronic throttle door interface, gas pedal interface, admission pressure temperature sensor interface;
Supply and regulation bonding pad are provided with compressed gas air intake G1, detected gas outlet G2, detected gas entrance G3, gas outlet valve V1, pressure-regulating valve S1, the first Pressure gauge PA1 and the second Pressure gauge PA2.
Specifically,
Accumulator BT1 passes through accumulator connectivity port fastening means case X, the positive pole of accumulator BT1 connects the first stationary contact of power switching switch K1 side, second stationary contact of switch K1 side connects one end of storage battery power supply display lamp L1, the other end ground connection of storage battery power supply display lamp L1;The minus earth of accumulator BT1;A step-down rectifier module in the bonding tool case X of alternating current connectivity port, the positive output end of step-down rectifier module provides the first supply voltage, the first stationary contact of power switching switch K1 opposite side is connect by insurance F1, second stationary contact of power switching switch K1 opposite side connects one end of Alternating Current Power Supply display lamp L2, the other end ground connection of Alternating Current Power Supply display lamp L2;The movable contact of power switching switch K1 connects one end of master switch SW1, one end of another termination master switch display lamp L3 of master switch SW1, and meets ECM by insurance F2;The other end ground connection of master switch display lamp L3;
The movable contact of power switching switch K1 is by insuring normally opened contact one end of F3 contact relay J1, and the normally opened contact other end of relay J 1 meets electrical interface P1, P2, P3, P4 by insurance F4;The coil of relay J 1 meets ECM;Electrical interface P1, P2, P3, P4 meet ECM by wire harness;
Electrical interface P5 connects ECM by CAN;Electrical interface P4 and P6 is connected with the CAN of electrical interface P5;Electrical interface P7, P8, P9 connect ECM by wire harness;ECM provides the second supply voltage to be connected to electrical interface P6, P7, P8, P9;
One end of compressed gas air intake G1 and pressure-regulating valve S1 is connected, and the other end of pressure-regulating valve S1 connects the first Pressure gauge PA1 and one end of gas outlet valve V1;The other end of gas outlet valve V1 connects detected gas outlet G2;Detected gas entrance G3 connects the second Pressure gauge PA2.
Further,
Power supply selects district to be additionally provided with malfunction indicator lamp L4, and malfunction indicator lamp L4 meets ECM.
Further,
ECM is inserted on ECM socket E2, and ECM socket E2 is arranged on storage area.
A kind of engine system parts diagnostic method, uses any of the above-described kind of engine system parts diagnostic tool case, specifically includes:
The detection method of electronic throttle: electronic throttle is connected with workbox X by electrical interface P7, gas pedal passes through electrical interface P8 fastening means case X;The host computer electrical interface P5 by connection T1 fastening means case;Turn on the power, workbox X and host computer is made to carry out communication, electronic throttle test pattern is opened by host computer, the butterfly valve position of air throttle is regulated by the aperture controlling gas pedal, throttle butterfly position signalling is sent to workbox X, then upload and show on host computer, by the contrast with butterfly valve location criteria numerical value, the quality of detection electronic throttle;This process tool case X obtains aperture voltage signal from gas pedal, feed back to host computer, host computer sends air throttle action scaling signal, feed back to workbox X, air throttle action scaling signal is converted into the throttle butterfly aperture signal of telecommunication and passes to air throttle by workbox X, thus regulates the butterfly valve position of air throttle;
Waste gas venting control valve detection method: compressed air passes through compressed gas air intake G1 fastening means case X;Waste gas venting control valve electrically connects workbox X by electrical interface P2;The detected gas outlet G2 of the air intake fastening means case X of waste gas venting control valve;The host computer electrical interface P5 by connection T1 fastening means case;Turn on the power, be passed through the compressed air of 6~10bar;Open waste gas venting control valve test pattern by host computer, by the bleeder holes aperture of PC control waste gas venting control valve, force value in detection waste gas venting control valve, contrast with standard value, detection waste gas venting control valve function;The signal of telecommunication is passed to workbox X, workbox X and converts electrical signals to pressure signal transmission to host computer by this process waste gas venting control valve;Demand pressure value is passed to workbox X, workbox X and demand pressure value is converted into pwm signal by host computer, passes to waste gas venting control valve, and pwm signal controls the force value in the bleeder holes aperture of waste gas venting control valve, and then regulation waste gas venting control valve;
Automatically controlled pressure regulator detection method: compressed air passes through compressed gas air intake G1 fastening means case X;Automatically controlled pressure regulator electrically connects workbox X by electrical interface P4;The detected gas outlet G2 of the air intake fastening means case X of automatically controlled pressure regulator;The host computer electrical interface P5 by connection T1 fastening means case;Open automatically controlled pressure regulator test pattern by host computer, input automatically controlled pressure regulator bid value by host computer, by detection automatically controlled pressure regulator outlet pressure sensor force value the most automatically controlled pressure regulator response value, contrast the gap of automatically controlled pressure regulator response value and standard value;Detect the automatically controlled pressure regulator regulating power to pressure;
Exhaust gas oxygen sensor detection method: exhaust gas oxygen sensor passes through electrical interface P3 fastening means case X;The host computer electrical interface P5 by connection T1 fastening means case;Opening exhaust gas oxygen sensor test pattern by host computer, exhaust gas oxygen sensor detection signal passes to host computer by workbox X, contrasts the difference of exhaust gas oxygen sensor signal and standard value, it is judged that the quality of exhaust gas oxygen sensor service behaviour on host computer;
Ignition coil and the detection method of spark plug: the host computer electrical interface P5 by connection T1 fastening means case;Ignition coil passes through electrical interface P1 fastening means case X;Use intact spark plug to connect on band ignition coil, according to the bid value of host computer check spark plug whether can normal ignition, judge whether ignition coil can normally produce high-tension electricity with this;In like manner, the service behaviour quality of intact ignition coil spark plug parts is utilized;
The detection method of second depressurized device: compressed air passes through compressed gas air intake G1 fastening means case X;The detected gas outlet G2 of second depressurized device entrance fastening means case X, the detected gas entrance G3 of second depressurized device outlet fastening means case X;After opening gas outlet valve V1, check the difference of Pressure gauge PA1 Yu PA2, judge the ability to work of second depressurized device.
It is an advantage of the current invention that: the present invention can realize the fault detect of engine system parts, be particularly suited for the fault detect of natural gas electric-control system parts;Avoid owing to fault judges the wasting of resources caused by accident.It is all to use imported components due to natural gas electric-control system majority, expensive, often reduce by an erroneous judgement and can save the maintenance cost of thousands of unit.
This workbox uses compressed air to substitute the natural gas used in actual vehicle, nontoxic, and more safely controllable.The harm using natural gas to bring can be prevented effectively from and fire that flammable natural gas causes, the generation of the peril such as blast.
This workbox uses simple, and operation is simple, the detection of multiple parts is integrated together.Use this workbox can the maintenance skills of fast lifting maintainer, improve maintenance efficiency.This workbox has maneuverability, and required power supply and source of the gas etc. can directly be taken resource on vehicle, be facilitated maintainer to go out to carry, and can carry out outdoor rescue etc..
Accompanying drawing explanation
Fig. 1 is the knot appearance schematic diagram of the present invention.
Fig. 2 is the electric part schematic diagram of the present invention.
Fig. 3 is the air path part schematic diagram of the present invention.
Fig. 4 is the electronic throttle detection connection figure of the present invention.
Fig. 5 is the waste gas venting control valve detection connection figure of the present invention.
Fig. 6 is the automatically controlled pressure regulator detection connection figure of the present invention.
Fig. 7 is the exhaust gas oxygen sensor detection connection figure of the present invention.
Fig. 8 is ignition coil and the spark plug detection connection figure of the present invention.
Fig. 9 is the second depressurized device detection connection figure of the present invention.
Figure 10 is that the ECM of the present invention writes with a brush dipped in Chinese ink connection figure.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
Engine system parts diagnostic tool case, as it is shown in figure 1, include workbox X, is provided with storage area 1, power supply selection district 2, insurance and parts bonding pad 3 on the main panel of workbox X, supplies and regulate bonding pad 4;
Storage area 1 is for ECM(central controller), adnexa, the depositing of wire harness;Storage area 1 is provided with ECM socket E2, ECM be inserted on ECM socket E2;
Power supply select district 2 be provided with accumulator connectivity port 201, alternating current connectivity port 202, power switching switch K1, storage battery power supply display lamp L1, Alternating Current Power Supply display lamp L2, master switch SW1(or be key switch), master switch display lamp L3, malfunction indicator lamp L4;
Insurance and parts bonding pad 3 include Insurance Block 301 and electrical interface P1, P2, P3, P4, P5, P6, P7, P8, P9, respectively as ignition coil interface, waste gas venting control valve interface, exhaust gas oxygen sensor interface, automatically controlled pressure regulator interface, host computer interface (OBD interface), atmospheric environment sensor interface, electronic throttle door interface, gas pedal interface, admission pressure temperature sensor interface;
As shown in Figure 2, accumulator BT1 passes through accumulator connectivity port 201 fastening means case X, the positive pole of accumulator BT1 connects the first stationary contact of power switching switch K1 side, and the second stationary contact of switch K1 side connects one end of storage battery power supply display lamp L1, the other end ground connection of storage battery power supply display lamp L1;The minus earth of accumulator BT1;A step-down rectifier module (the AC-DC exchange 220v in Fig. 2 turns direct current 24V module) in the bonding tool case X of alternating current connectivity port 202, the positive output end of step-down rectifier module provides the first supply voltage 24v, the first stationary contact of power switching switch K1 opposite side is connect by insurance F1, second stationary contact of power switching switch K1 opposite side connects one end of Alternating Current Power Supply display lamp L2, the other end ground connection of Alternating Current Power Supply display lamp L2;The movable contact of power switching switch K1 connects one end of master switch SW1, one end of another termination master switch display lamp L3 of master switch SW1, and meets ECM by insurance F2;The other end ground connection of master switch display lamp L3;Malfunction indicator lamp L4 meets ECM;
The movable contact of power switching switch K1 is by insuring normally opened contact one end of F3 contact relay J1, and the normally opened contact other end of relay J 1 meets electrical interface P1, P2, P3, P4 by insurance F4;The coil of relay J 1 meets ECM;Electrical interface P1, P2, P3, P4 meet ECM by wire harness;
Electrical interface P5 connects ECM by CAN;Electrical interface P4 and P6 is connected with the CAN of electrical interface P5;Electrical interface P7, P8, P9 connect ECM by wire harness;ECM provides the second supply voltage (5V), is connected to electrical interface P6, P7, P8, P9;
ECM is inserted on ECM socket E2, and therefore, workbox X, in addition to providing parts diagnostic function, additionally provides ECM and writes with a brush dipped in Chinese ink function.
Supply and regulation bonding pad 4 are provided with compressed gas air intake G1, detected gas outlet G2, detected gas entrance G3, gas outlet valve V1, pressure-regulating valve S1, the first Pressure gauge PA1 and the second Pressure gauge PA2;
As it is shown on figure 3, one end of compressed gas air intake G1 and pressure-regulating valve S1 is connected, the other end of pressure-regulating valve S1 connects the first Pressure gauge PA1 and one end of gas outlet valve V1;The other end of gas outlet valve V1 connects detected gas outlet G2;Detected gas entrance G3 connects the second Pressure gauge PA2;
First Pressure gauge PA1 is for showing compressed gas source pressure after overregulating;Second Pressure gauge PA2 is for showing that the detected gas of detected gas entrance G3 enters gas feedback pressure;
The use of workbox X:
Workbox accesses 24V accumulator jar power supply or connects 220V mains supply, it is only necessary to a kind of power supply;
(1) detection method of electronic throttle, is seen Fig. 4: electronic throttle and is connected with workbox X by electrical interface P7, and gas pedal passes through electrical interface P8 fastening means case X;The host computer electrical interface P5 by connection T1 fastening means case;
Turn on the power, workbox X and host computer is made to carry out communication, electronic throttle test pattern is opened by host computer, the butterfly valve position of air throttle is regulated by the aperture controlling gas pedal, throttle butterfly position signalling is sent to workbox X, then upload and show on host computer, by the contrast with butterfly valve location criteria numerical value, the quality of detection electronic throttle;
This process tool case X obtains aperture voltage signal from gas pedal, feed back to host computer, host computer sends air throttle action scaling signal, feed back to workbox X, air throttle action scaling signal is converted into the throttle butterfly aperture signal of telecommunication and passes to air throttle by workbox X, thus regulates the butterfly valve position of air throttle;
(2) waste gas venting control valve detection method, sees Fig. 5: compressed air by compressed gas air intake G1 fastening means case X;Waste gas venting control valve electrically connects workbox X by electrical interface P2;The detected gas outlet G2 of the air intake fastening means case X of waste gas venting control valve;The host computer electrical interface P5 by connection T1 fastening means case;
Turn on the power, be passed through the compressed air of 6~10bar;Open waste gas venting control valve test pattern by host computer, by the bleeder holes aperture of PC control waste gas venting control valve, force value in detection waste gas venting control valve, contrast with standard value, detection waste gas venting control valve function;
The signal of telecommunication is passed to workbox X, workbox X and converts electrical signals to pressure signal transmission to host computer by this process waste gas venting control valve;Demand pressure value is passed to workbox X, workbox X and demand pressure value is converted into pwm signal by host computer, passes to waste gas venting control valve, and pwm signal controls the force value in the bleeder holes aperture of waste gas venting control valve, and then regulation waste gas venting control valve;Pwm signal machine pulse-width signal;
(3) automatically controlled pressure regulator detection method, sees Fig. 6: compressed air by compressed gas air intake G1 fastening means case X;Automatically controlled pressure regulator electrically connects workbox X by electrical interface P4;The detected gas outlet G2 of the air intake fastening means case X of automatically controlled pressure regulator;The host computer electrical interface P5 by connection T1 fastening means case;
Open automatically controlled pressure regulator test pattern by host computer, input automatically controlled pressure regulator bid value by host computer, by detection automatically controlled pressure regulator outlet pressure sensor force value the most automatically controlled pressure regulator response value, contrast the gap of automatically controlled pressure regulator response value and standard value;Detect the automatically controlled pressure regulator regulating power to pressure;
Between automatically controlled pressure regulator and workbox X and host computer, transmission is all CAN message information;
(4) exhaust gas oxygen sensor detection method, sees Fig. 7: exhaust gas oxygen sensor by electrical interface P3 fastening means case X;The host computer electrical interface P5 by connection T1 fastening means case;
Opening exhaust gas oxygen sensor test pattern by host computer, exhaust gas oxygen sensor detection signal passes to host computer by workbox X, contrasts the difference of exhaust gas oxygen sensor signal and standard value, it is judged that the quality of exhaust gas oxygen sensor service behaviour on host computer;
In like manner can detect atmospheric environment sensor, admission pressure temperature sensor.
It is multi-channel electric signal between exhaust gas oxygen sensor and workbox X, is numerical signal (CAN signal form) between workbox X and host computer;
(5) ignition coil and the detection method of spark plug, sees Fig. 8: the host computer electrical interface P5 by connection T1 fastening means case;Ignition coil passes through electrical interface P1 fastening means case X;Use intact spark plug to connect on band ignition coil, can according to the bid value of host computer check spark plug whether can normal ignition, judge whether ignition coil can normally produce high-tension electricity with this;In like manner, intact ignition coil is utilized can to test the service behaviour quality of spark plug parts;
(6) detection method of second depressurized device, sees Fig. 9: compressed air by compressed gas air intake G1 fastening means case X;The detected gas outlet G2 of second depressurized device entrance fastening means case X, the detected gas entrance G3 of second depressurized device outlet fastening means case X;After opening gas outlet valve V1, check the difference of Pressure gauge PA1 Yu PA2, judge the ability to work of second depressurized device.
In like manner can detect the ability to work of compressed air decompressor.
(7) ECM data are downloaded and are write with a brush dipped in Chinese ink method, see Figure 10: by the blank ECM of ECM socket E2 connection, can write with a brush dipped in Chinese ink data by host computer for blank ECM download.Data are transmitted by CAN message signal.

Claims (5)

1. an engine system parts diagnostic tool case, including workbox X, it is characterised in that: be provided with on the main panel of workbox X storage area (1), power supply select district (2), insurance and parts bonding pad (3), supply and regulate bonding pad (4);Workbox X contains ECM;
Power supply selects district (2) to be provided with accumulator connectivity port (201), alternating current connectivity port (202), power switching switch K1, storage battery power supply display lamp L1, Alternating Current Power Supply display lamp L2, master switch SW1, master switch display lamp L3;
Insurance and parts bonding pad (3) include Insurance Block (301) and electrical interface P1, P2, P3, P4, P5, P6, P7, P8, P9, respectively as ignition coil interface, waste gas venting control valve interface, exhaust gas oxygen sensor interface, automatically controlled pressure regulator interface, host computer interface, atmospheric environment sensor interface, electronic throttle door interface, gas pedal interface, admission pressure temperature sensor interface;
Supply and regulation bonding pad (4) are provided with compressed gas air intake G1, detected gas outlet G2, detected gas entrance G3, gas outlet valve V1, pressure-regulating valve S1, the first Pressure gauge PA1 and the second Pressure gauge PA2.
2. engine system parts diagnostic tool case as claimed in claim 1, it is characterised in that:
Accumulator BT1 passes through accumulator connectivity port (201) fastening means case X, the positive pole of accumulator BT1 connects the first stationary contact of power switching switch K1 side, second stationary contact of switch K1 side connects one end of storage battery power supply display lamp L1, the other end ground connection of storage battery power supply display lamp L1;The minus earth of accumulator BT1;A step-down rectifier module in alternating current connectivity port (202) bonding tool case X, the positive output end of step-down rectifier module provides the first supply voltage, the first stationary contact of power switching switch K1 opposite side is connect by insurance F1, second stationary contact of power switching switch K1 opposite side connects one end of Alternating Current Power Supply display lamp L2, the other end ground connection of Alternating Current Power Supply display lamp L2;The movable contact of power switching switch K1 connects one end of master switch SW1, one end of another termination master switch display lamp L3 of master switch SW1, and meets ECM by insurance F2;The other end ground connection of master switch display lamp L3;
The movable contact of power switching switch K1 is by insuring normally opened contact one end of F3 contact relay J1, and the normally opened contact other end of relay J 1 meets electrical interface P1, P2, P3, P4 by insurance F4;The coil of relay J 1 meets ECM;Electrical interface P1, P2, P3, P4 meet ECM by wire harness;
Electrical interface P5 connects ECM by CAN;Electrical interface P4 and P6 is connected with the CAN of electrical interface P5;Electrical interface P7, P8, P9 connect ECM by wire harness;ECM provides the second supply voltage to be connected to electrical interface P6, P7, P8, P9;
One end of compressed gas air intake G1 and pressure-regulating valve S1 is connected, and the other end of pressure-regulating valve S1 connects the first Pressure gauge PA1 and one end of gas outlet valve V1;The other end of gas outlet valve V1 connects detected gas outlet G2;Detected gas entrance G3 connects the second Pressure gauge PA2.
3. engine system parts diagnostic tool case as claimed in claim 1, it is characterised in that:
Power supply selects district (2) to be additionally provided with malfunction indicator lamp L4, and malfunction indicator lamp L4 meets ECM.
4. engine system parts diagnostic tool case as claimed in claim 1, it is characterised in that:
ECM is inserted on ECM socket E2, and ECM socket E2 is arranged on storage area (1).
5. engine system parts diagnosis detecting method, uses any one engine system parts diagnostic tool case as described in claim 1,2,3 or 4, specifically includes:
The detection method of electronic throttle: electronic throttle is connected with workbox X by electrical interface P7, gas pedal passes through electrical interface P8 fastening means case X;The host computer electrical interface P5 by connection T1 fastening means case;Turn on the power, workbox X and host computer is made to carry out communication, electronic throttle test pattern is opened by host computer, the butterfly valve position of air throttle is regulated by the aperture controlling gas pedal, throttle butterfly position signalling is sent to workbox X, then upload and show on host computer, by the contrast with butterfly valve location criteria numerical value, the quality of detection electronic throttle;This process tool case X obtains aperture voltage signal from gas pedal, feed back to host computer, host computer sends air throttle action scaling signal, feed back to workbox X, air throttle action scaling signal is converted into the throttle butterfly aperture signal of telecommunication and passes to air throttle by workbox X, thus regulates the butterfly valve position of air throttle;
Waste gas venting control valve detection method: compressed air passes through compressed gas air intake G1 fastening means case X;Waste gas venting control valve electrically connects workbox X by electrical interface P2;The detected gas outlet G2 of the air intake fastening means case X of waste gas venting control valve;The host computer electrical interface P5 by connection T1 fastening means case;Turn on the power, be passed through the compressed air of 6~10bar;Open waste gas venting control valve test pattern by host computer, by the bleeder holes aperture of PC control waste gas venting control valve, force value in detection waste gas venting control valve, contrast with standard value, detection waste gas venting control valve function;The signal of telecommunication is passed to workbox X, workbox X and converts electrical signals to pressure signal transmission to host computer by this process waste gas venting control valve;Demand pressure value is passed to workbox X, workbox X and demand pressure value is converted into pwm signal by host computer, passes to waste gas venting control valve, and pwm signal controls the force value in the bleeder holes aperture of waste gas venting control valve, and then regulation waste gas venting control valve;
Automatically controlled pressure regulator detection method: compressed air passes through compressed gas air intake G1 fastening means case X;Automatically controlled pressure regulator electrically connects workbox X by electrical interface P4;The detected gas outlet G2 of the air intake fastening means case X of automatically controlled pressure regulator;The host computer electrical interface P5 by connection T1 fastening means case;Open automatically controlled pressure regulator test pattern by host computer, input automatically controlled pressure regulator bid value by host computer, by detection automatically controlled pressure regulator outlet pressure sensor force value the most automatically controlled pressure regulator response value, contrast the gap of automatically controlled pressure regulator response value and standard value;Detect the automatically controlled pressure regulator regulating power to pressure;
Exhaust gas oxygen sensor detection method: exhaust gas oxygen sensor passes through electrical interface P3 fastening means case X;The host computer electrical interface P5 by connection T1 fastening means case;Opening exhaust gas oxygen sensor test pattern by host computer, exhaust gas oxygen sensor detection signal passes to host computer by workbox X, contrasts the difference of exhaust gas oxygen sensor signal and standard value, it is judged that the quality of exhaust gas oxygen sensor service behaviour on host computer;
Ignition coil and the detection method of spark plug: the host computer electrical interface P5 by connection T1 fastening means case;Ignition coil passes through electrical interface P1 fastening means case X;Use intact spark plug to connect on band ignition coil, according to the bid value of host computer check spark plug whether can normal ignition, judge whether ignition coil can normally produce high-tension electricity with this;In like manner, the service behaviour quality of intact ignition coil spark plug parts is utilized;
The detection method of second depressurized device: compressed air passes through compressed gas air intake G1 fastening means case X;The detected gas outlet G2 of second depressurized device entrance fastening means case X, the detected gas entrance G3 of second depressurized device outlet fastening means case X;After opening gas outlet valve V1, check the difference of Pressure gauge PA1 Yu PA2, judge the ability to work of second depressurized device.
CN201610344134.4A 2016-05-20 2016-05-20 Engine system parts diagnostic tool case and diagnosis detecting method Expired - Fee Related CN106014633B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108663587A (en) * 2018-04-08 2018-10-16 联合汽车电子(重庆)有限公司 Electronic throttle delivery test system

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