CN103954839A - Electric control engine wire harness detection apparatus - Google Patents
Electric control engine wire harness detection apparatus Download PDFInfo
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- CN103954839A CN103954839A CN201410098426.5A CN201410098426A CN103954839A CN 103954839 A CN103954839 A CN 103954839A CN 201410098426 A CN201410098426 A CN 201410098426A CN 103954839 A CN103954839 A CN 103954839A
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Abstract
The invention discloses an electric control engine wire harness detection apparatus. The employed technical scheme comprises a detection apparatus and a detection method. The technical scheme of the detection apparatus is as follows: multiple parts of an electric control engine are connected with an ECU through a wire harness, and a storage battery supplies power to the ECU. A special-purpose wire harness detector replaces the ECU to mainly carry out detection on the resistance of a power supply line bundle and a fuel injector line bundle. The wire harness detector is provided with nine plug members or insertion holes and is respectively connected with thirteen resistors. The voltages and currents at the two ends of the wire harness are detected by use of a high-precision volt ammeter so as to calculate resistance, and detected data is compared to the restriction resistance required by the ECU. According to the invention, whether the quality of the matching wire harness of the electric control engine reaches a technical standard can be evaluated from the magnitude order of precision, and the operation reliability of the ECU is effectively guaranteed. The design structure is simple, the practicality is high, and through the simple change of ECU connection stitches, the apparatus can be developed to be applied to other products needing wire harness detection.
Description
Technical field
The invention belongs to electric-control motor electronic control technology, be specifically related to the device that engine wiring harness quality is detected.
Background technology
Reach the index request of national environmental protection in order to meet motor vehicle exhaust emission, increasing electronic sensor and automatically controlled device are widely applied on engine.These electronic sensors and automatically controlled device are substantially all arranged on engine body, are incorporated into ECU(engine core control module by rat tail) in, controlled by ECU.Therefore, wire harness is the vitals that connects ECU, fuel injector, high-pressure oil pump etc. and various electronic sensors.If because wire harness material, crudy existing problems cause wire harness resistance excessive, or wire harness uses for a long time the phenomenons such as corrosion is aging occurs, and it is large that resistance continues to become, and will directly have influence on the course of work of ECU.Therefore ECU will maybe cannot receive not oil spout of signal or wrong oil spout a little less than too because of the signal receiving, and engine running will be abnormal, and serious meeting causes parts damages maybe cannot start.If particularly cold area wire harness poor quality, electric-control motor cold start-up meeting is subject to great impact.So, wire harness enter factory supporting before, tackle its spot-check examination, qualification and screen again, its quality is carried out to strict control.But regrettably current qualification mode is only, according to wire harness drawing, the outward appearance of wire harness and concrete size are carried out to surface inspection, and the quality to wire harness and reliability are not carried out the special device detecting, and the present invention is exactly for head it off proposes.
Summary of the invention
The object of the invention is, provide a kind of device that electric-control motor wire harness is detected, to the q&r of electric-control motor wire harness is monitored.
Be divided into pick-up unit and detection method for realizing the technical scheme that object of the present invention takes, wherein the technical scheme of pick-up unit is: multiple parts of electric-control motor are connected with ECU by wire harness, and accumulator is powered to ECU.Wire harness comprises feeder circuit bundle, fuel injector route bundle and the each electronic sensor route of electric-control motor parts bundle.The present invention proposes the alternative ECU of a kind of wire harness detecting device the resistance of each wire harness is checked, wire harness detecting device is provided with 9 plug connectors and joins with 13 resistance respectively.Wherein R1 to R3 is wire harness detecting device internal resistance; R4+R5 is feeder circuit bundle resistance; R6+R7 is engine the first cylinder injector route bundle resistance; R8+R9 is the second cylinder injector route bundle resistance; R10+R11 is the 3rd cylinder injector route bundle resistance; R12+R13 is the 4th cylinder injector route bundle resistance.A, B plug connector join by R4, R5 and accumulator anode and cathode respectively; A plug connector is connected in series R1, R2, R3 and D plug connector successively; B plug connector connects C plug connector; E plug connector connects R6; F plug connector connects R7; G plug connector connects R9; H plug connector connects R11; I plug connector connects R13; E plug connector, R8, R10, R12 parallel connection are joined with D plug connector.
The automatically controlled core cell of ECU() must require to reach bold and unconstrained ohm level to the resistance value of the wire harness that matches, can only be accurate to ohm level and adopt digital multimeter because be subject to the restriction of precision.Therefore cannot different wire harness resistance values be carried out accurately relatively and be evaluated by digital multimeter, whether the bold and unconstrained ohm level resistance value that also cannot judge wire harness within the scope of ECU technical requirement, have proposed a kind of wire harness detecting device that wire harness resistance detects that is exclusively used in for this reason.The digital voltage of this detecting device selection high precision (6 half) and reometer are as measuring instrument, in wire harness detecting device, if accurately measure the voltage and the electric current that consume on certain wire harness, just can measure the resistance of this wire harness according to Ohm law, then contrast with the resistance value of ECU requirement, reach the object of evaluating and examining wire harness quality.
Feature of the present invention and beneficial effect are: whether (1) can reach technical standard to the supporting wire harness quality of electric-control motor from the order of magnitude of precision is passed judgment on, effectively ensure that ECU reliability of operation (2) utilizes wire harness detecting device to provide the line-transect quality contrast property test examination that business provides together to difference, for choose reasonable provision in set business provides, digit basis (3) this device project organization is simple, cost is low, practical (4) connect stitch by simple change ECU, can expand to use and need to detect on the product of wire harness at other.
Brief description of the drawings
Fig. 1 is system schematic of the present invention.
Fig. 2 is wire harness detecting device circuit of the present invention and test elementary diagram.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, apparatus structure of the present invention and concrete method of testing are described.It should be noted that, the present embodiment is narrative, is not determinate, does not limit protection scope of the present invention with this.
Electric-control motor Beam Detector, comprises electric-control motor, wire harness, ECU, accumulator, wire harness detecting device, voltage, current instrument, triggering box and sheet metal etc.Multiple parts of electric-control motor 1 are connected with ECU3 by wire harness 2, and accumulator 4 is powered to ECU.Wire harness comprises feeder circuit bundle, fuel injector route bundle and the each electronic sensor route of electric-control motor parts bundle.The concrete technical scheme of device is: adopt wire harness detecting device 5 to substitute ECU the resistance of each wire harness is checked to (being that wire harness detecting device is equivalent to ECU), wire harness detecting device is provided with 9 plug connectors and joins with 13 resistance respectively.When plug connector inserts, circuit is path; While extracting for opening circuit.In figure, R1 to R3 is wire harness detecting device internal resistance; R4+R5 is feeder circuit bundle resistance; R6+R7 is engine the first cylinder injector route bundle resistance; R8+R9 is the second cylinder injector route bundle resistance; R10+R11 is the 3rd cylinder injector route bundle resistance; R12+R13 is the 4th cylinder injector route bundle resistance.A, B plug connector join by R4, R5 and accumulator anode and cathode respectively.A plug connector is connected in series R1, R2, R3 and D plug connector successively; B plug connector connects C plug connector.E plug connector connects R6; F plug connector connects R7; G plug connector connects R9; H plug connector connects R11; I plug connector connects R13, and E plug connector, R8, R10, R12 parallel connection are joined with D plug connector.
Taking four cylinder electric-control motors as example, wire harness resistance comprises: feeder circuit bundle resistance and fuel injector route bundle.Wherein supply line's resistance R 4+R5 has comprised fuse resistance, the battery positive voltage contact resistance sum to the resistance of ECU, ECU to resistance and the joint of battery terminal negative.
One, the method step of feeder circuit bundle resistance detection is:
1) A in wire harness detecting device, B, C, D plug connector are extracted, feeder circuit Shu Yiduan is connected with battery feed both positive and negative polarity; The other end is connected to A, the B jack in corresponding wire harness detecting device.The first voltage table U1 slotted line is received respectively the positive and negative terminal of battery feed; Second voltage table U2 slotted line is received A, the B jack of wire harness detecting device, and reometer A slotted line is received C, the D jack of wire harness detecting device.From triggering the telltale hole outconnector respectively of box 6, the input of receiving first, second voltage table and reometer triggers hole, presses and triggers box button to ensure each test instrumentation synchro measure.
2) the feeder circuit bundle resistance of R4+R5 for testing, R4+R5=(U1-U2)/A.Every synchronous triggering 1 time, by relevant test data record, tests 5 times altogether, gets its mean value.
3) by 5 resistance mean values that detect, the restriction resistance requiring with ECU contrasts, and checks and whether meets the technical requirement of ECU to feeder circuit bundle resistance, and the restriction resistance of ECU requires as shown in table 1.
Two, the method step of fuel injector route bundle resistance detection is:
1) C in wire harness detecting device, E, F plug connector are extracted, from electric-control motor, one end of the first cylinder injector wire harness is connected with E, F jack in wire harness detecting device; Sheet metal 7 short circuits for the other end.Second voltage table U2 slotted line is received E, the F jack in wire harness detecting device; Reometer A slotted line is received C, the F jack of wire harness detecting device.From triggering the telltale hole outconnector respectively of box, the input of receiving voltage and current table triggers hole, presses and triggers box button to ensure each test instrumentation synchro measure.
2) the first cylinder injector route bundle resistance of R6+R7 for testing, R6+R7=U2/A, every synchronous triggering 1 time, by relevant test data record, tests 5 times altogether, gets its mean value.
3) by 5 resistance mean values that detect, the restriction resistance requiring with ECU contrasts, and checks and whether meets the technical requirement of ECU to fuel injector route bundle resistance.
4) in like manner, the C in wire harness detecting device, E, G plug connector are extracted, from electric-control motor, one end of the second cylinder injector wire harness is connected with E, G jack in wire harness detecting device; Other end sheet metal short circuit.Second voltage table U2 slotted line is received E, the G jack in wire harness detecting device; Reometer A slotted line is received C, the G jack of wire harness detecting device.From triggering the telltale hole outconnector respectively of box, the input of receiving voltage and current table triggers hole, presses and triggers box button to ensure each test instrumentation synchro measure.
5) the second cylinder injector route bundle resistance of R8+R9 for testing, R8+R9=U2/A, every synchronous triggering 1 time, by relevant test data record, tests 5 times altogether, gets its mean value.
6) by 5 resistance mean values that detect, the restriction resistance requiring with ECU contrasts, and checks and whether meets the technical requirement of ECU to fuel injector route bundle resistance.
7) successively the C in wire harness detecting device, E, H plug connector are extracted, from electric-control motor, one end of the 3rd cylinder injector wire harness is connected with E, H jack in wire harness detecting device; Other end sheet metal short circuit.Second voltage table U2 slotted line is received E, the H jack in wire harness detecting device; Reometer A slotted line is received C, the H jack of wire harness detecting device.Other is constant, can measure the 3rd cylinder injector route bundle R10+R11 resistance.
8) the rest may be inferred, and the C in wire harness detecting device, E, I plug connector are extracted, and from electric-control motor, one end of the 3rd cylinder injector wire harness is connected with E, I jack in wire harness detecting device; Other end sheet metal short circuit.Second voltage table U2 slotted line is received E, the I jack in wire harness detecting device; Reometer A slotted line is received C, the I jack of wire harness detecting device.Other is constant, can complete the test of the 4th cylinder injector route bundle R12+R13 resistance.
The present embodiment wire harness detecting device internal resistance is designed to R1=R2=R3=3.3 ohm/50 watt.
Wire harness detecting device be according to each input of actual ECU, output signal pin functionality designs, effect is to replace ECU(module board) check the resistance of concrete wire harness.
Feeder circuit bundle and fuel injector route bundle are key and the focus of whole electric control engine system, therefore detect as example and be specifically described taking electric-control motor feeder circuit bundle and fuel injector route bundle.Other each electrical control member on electric-control motor and each electronic sensor route bundle detect herewith principle, just carry out the change of the different pin functionality of wire harness detecting device delivery outlet and replace.
Table 1ECU to match for circuit and the technical requirement of fuel injector route bundle resistance:
| Wire harness | Technical requirement (20 DEG C of environment temperatures) |
| Feeder circuit bundle | 80mOhm(person of outstanding talent ohm) |
| Fuel injector route bundle | 120mOhm(person of outstanding talent ohm) |
Claims (3)
1. electric-control motor Beam Detector, there is electric-control motor, wire harness, ECU, accumulator, wire harness detecting device, voltage, current instrument, trigger box and sheet metal, multiple parts of electric-control motor (1) are by wire harness (2) and ECU(3) be connected, accumulator (4) is powered to ECU, wire harness comprises feeder circuit bundle, fuel injector route bundle and the each electronic sensor route of electric-control motor parts bundle, it is characterized in that: wire harness detecting device (5) substitutes ECU the resistance of each wire harness is checked, wire harness detecting device is provided with 9 plug connectors and joins with 13 resistance respectively, wherein R1 to R3 is wire harness detecting device internal resistance, R4+R5 is feeder circuit bundle resistance, R6+R7 is engine the first cylinder injector route bundle resistance, R8+R9 is the second cylinder injector route bundle resistance, R10+R11 is the 3rd cylinder injector route bundle resistance, R12+R13 is the 4th cylinder injector route bundle resistance, and A, B plug connector join by R4, R5 and accumulator anode and cathode respectively, A plug connector is connected in series R1, R2, R3 and D plug connector successively, B plug connector connects C plug connector, E plug connector connects R6, F plug connector connects R7, G plug connector connects R9, H plug connector connects R11, I plug connector connects R13, E plug connector, R8, R10, R12 parallel connection are joined with D plug connector.
2. one kind according to method that described in claim 1, electric-control motor Beam Detector carries out wire harness detection, wire harness resistance comprises: feeder circuit bundle resistance and fuel injector route bundle, wherein supply line's resistance R 4+R5 has comprised fuse resistance, the battery positive voltage contact resistance sum to the resistance of ECU, ECU to resistance and the joint of battery terminal negative, it is characterized in that:
One, the method step of feeder circuit bundle resistance detection is:
1) A in wire harness detecting device, B, C, D plug connector are extracted, feeder circuit Shu Yiduan is connected with battery feed both positive and negative polarity; The other end is connected to A, the B jack in corresponding wire harness detecting device, and the first voltage table U1 slotted line is received respectively the positive and negative terminal of battery feed; Second voltage table U2 slotted line is received A, the B jack of wire harness detecting device, reometer A slotted line is received C, the D jack of wire harness detecting device, go between respectively and receive the input hole of first, second voltage table and reometer from the telltale hole of triggering box (6), press and trigger box button to ensure each test instrumentation synchro measure
2) the feeder circuit bundle resistance of R4+R5 for testing, R4+R5=(U1-U2)/A, every triggering synchronous 1 time, by relevant test data record, tests 5 times altogether, gets its mean value,
3), by 5 resistance mean values that detect, the restriction resistance requiring with ECU contrasts, and check and whether meet the technical requirement of ECU to feeder circuit bundle resistance,
Two, the method step of fuel injector route bundle resistance detection is:
1) C in wire harness detecting device, E, F plug connector are extracted, from electric-control motor, one end of the first cylinder injector wire harness is connected with E, F jack in wire harness detecting device; Sheet metal for the other end (7) short circuit, second voltage table U2 slotted line is received E, the F jack in wire harness detecting device; Reometer A slotted line is received C, the F jack of wire harness detecting device, goes between respectively and receives the input hole of voltage and current table from the telltale hole of triggering box, and the options button triggering in box is all set to trigger mode, to ensure instrument synchro measure,
2) the first cylinder injector route bundle resistance of R6+R7 for testing, the every triggering synchronous of R6+R7=U2/A 1 time, by relevant test data record, tests 5 times altogether, gets its mean value,
3), by 5 resistance mean values that detect, the restriction resistance requiring with ECU contrasts, and check and whether meet the technical requirement of ECU to fuel injector route bundle resistance,
4) C in wire harness detecting device, E, G plug connector are extracted, from electric-control motor, one end of the second cylinder injector wire harness is connected with E, G jack in wire harness detecting device; Other end sheet metal short circuit, second voltage table U2 slotted line is received E, the G jack in wire harness detecting device; Reometer A slotted line is received C, the G jack of wire harness detecting device, goes between respectively and receives the input hole of voltage and current table from the telltale hole of triggering box, and press and trigger box button to ensure each test instrumentation synchro measure,
5) the second cylinder injector route bundle resistance of R8+R9 for testing, the every triggering synchronous of R8+R9=U2/A 1 time, by relevant test data record, tests 5 times altogether, gets its mean value,
6), by 5 resistance mean values that detect, the restriction resistance requiring with ECU contrasts, and check and whether meet the technical requirement of ECU to fuel injector route bundle resistance,
7) successively the C in wire harness detecting device, E, H plug connector are extracted, from electric-control motor, one end of the 3rd cylinder injector wire harness is connected with E, H jack in wire harness detecting device; Other end sheet metal short circuit, second voltage table U2 slotted line is received E, the H jack in wire harness detecting device; Reometer A slotted line is received C, the H jack of wire harness detecting device, and other is constant, can measure the 3rd cylinder injector route bundle R10+R11 resistance,
8) the rest may be inferred, and the C in wire harness detecting device, E, I plug connector are extracted, and from electric-control motor, one end of the 3rd cylinder injector wire harness is connected with E, I jack in wire harness detecting device; Other end sheet metal short circuit, second voltage table U2 slotted line is received E, the I jack in wire harness detecting device; Reometer A slotted line is received C, the I jack of wire harness detecting device, and other is constant, can complete the test of the 4th cylinder injector route bundle R12+R13 resistance.
3. according to electric-control motor Beam Detector described in claim 1, it is characterized in that: described wire harness detecting device internal resistance is designed to R1=R2=R3=3.3 ohm/50 watt.
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| CN201410098426.5A CN103954839A (en) | 2014-03-17 | 2014-03-17 | Electric control engine wire harness detection apparatus |
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| CN107085145A (en) * | 2016-02-15 | 2017-08-22 | 福特全球技术公司 | Resistance measurement instrument |
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| CN107478435A (en) * | 2017-04-06 | 2017-12-15 | 宝沃汽车（中国）有限公司 | The electrical connector of vehicle assists detection method and system |
| CN110187182A (en) * | 2019-06-29 | 2019-08-30 | 潍柴动力股份有限公司 | A kind of monitoring method and device |
| WO2019215034A1 (en) * | 2018-05-08 | 2019-11-14 | Delphi Technologies Ip Limited | Method to determine the operating resistance of an electrical harness connecting an ecu to a solenoid controlled valve |
| CN110568264A (en) * | 2019-09-24 | 2019-12-13 | 潍柴动力股份有限公司 | Wire harness detection device and method |
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Application publication date: 20140730 |