• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a method for diagnosing a ground fault of a start / stop member of a vehicle engine. The method consists, in a prior phase, of equipping a control device with a switchable mass between two positions and of connecting an output to the ground of a start / stop device with this switchable mass; and during operation of the vehicle, during a start / stop command: • to read (step 210) a first value of the signal present at the input of the read circuit and then • to temporarily switch (step 220) the switchable mass of a first position of connection to a mass of the vehicle at a second position of connection to a mass resistor, • to read a second value (step 230) of the signal received by the read circuit during the switching of the mass to the resistor and • to compare the two values read to diagnose a short circuit fault to the ground of the start / stop member. The invention extends to a start / stop system implementing this method.
    公开号:FR3028049A1
    申请号:FR1460614
    申请日:2014-11-04
    公开日:2016-05-06
    发明作者:Jean-Marc Tornare；Christophe Pradelles
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a method for diagnosing a start / stop member of a motor vehicle engine. More particularly, it is a matter of determining whether this start / stop member is short-circuited to ground. In known manner, the start / stop members (usually called "start / stop" button - for start-up and stop in English language) are used in motor vehicles to transmit to an engine control computer a start-up order. or stop this engine. Such bodies are particularly used in vehicles equipped with hands-free access system using no mechanical key. They are routinely fitted to vehicles incorporating a function of stopping the engine when the vehicle is stationary and automatically restarting as soon as the vehicle resumes its movement (following, for example, pressing the accelerator pedal or the pedal clutch). These functions called "stop and go" (English stop and restart) are well known in themselves and will not be detailed here. The start / stop systems 100 (see FIG. 1) are constituted by a start / stop device 10 controlled by a control device 11. The start / stop device 10 conventionally comprises three input outputs. Namely: - a power supply input 1, 20 - a control output 2 delivering a control signal for starting and stopping an engine (not shown), and - an output to ground 3 This start / stop device 10 also comprises a two-position start / stop (switch 4) connected via a conductive track 5 to the control output 2. The supply input 1 of the starting device 10 The stop also comprises, in a known manner, a light-emitting diode (Led 14) in series with a power supply resistor RA. This LED 14 has the function of illuminating to make visible the start / stop member 4. FIG. 1 also illustrates a conventional control device diagram 11 comprising a computer 12, a control circuit 13 connected to the supply input 1 of the starting device 10, a read circuit 15 of the state of the start / stop member and a return to earth 16. When a driver wishes to activate the start / stop member 4 he simply has to press the switch 4 to switch it to its closed position. In doing so, the input of the read circuit 15 detects a signal value substantially equal to zero (or very low). However, if a short circuit to ground (represented by two broken lines CC) occurs on the conductive track 5 between the switch 4 and the output 2, the value read by the reading circuit 15 is also substantially equal to zero ( or very weak). Two distinct states, namely a start / stop command and a short circuit on the conductive track 5, result in the same value (zero) detected by the read circuit 15. It is therefore not possible to separate these two states one of the other, which is a significant risk of misinterpretation of the command 10 performed by the driver. Indeed, if a short circuit to ground occurs on the conductive track 5, it can create an engine start command (unwanted) which is a risk of critical malfunction for the use of the vehicle. In general, this risk is discarded by the fact that there are other parameters which make it possible to verify that an order to start the engine has been made. For example, the vehicle control system will verify that the brake or clutch pedal has also been activated. However, it appeared important to eliminate the risk of starting the engine on the presence of a short circuit to ground on the conductive track 5 to improve the safety of the vehicle, without resorting to specific maneuvers performed by the driver ( press on the brake or the clutch pedal). The purpose of the present invention is therefore to overcome all of the disadvantages described above and in particular to allow to detect (diagnose) a short circuit to the ground of the motor start / stop control member. Another object of the invention is to enable this diagnosis inexpensively and reliably. For this purpose, the present invention relates to a method for diagnosing a ground fault of a starting member! stop adapted to control the starting and stopping of a vehicle engine, said member being part of a starting device! stopping further comprising an output to ground, the said device being further associated with a control device comprising a circuit for reading the state of the start / stop member, the said diagnostic method being characterized in that that it consists: in a preliminary phase: to equip the control device with a switchable mass between two positions and to connect the output to the ground of the starting / stopping device with this switchable mass, during operation of the vehicle, during a start / stop command: to read a first value of the signal present at the input of the read circuit and then to temporarily switch the switchable mass from a first link position to a vehicle ground at a second position connecting to a ground resistance, - reading a second value of the signal received by the read circuit during the switching of the mass to the resistor and, to compare the first and second values, and - if the first and second read values are substantially equal, to diagnose a short circuit fault to ground, - if the first and second values read are substantially different, to diagnose a short circuit fault absence at the mass of the start / stop member. Thus, the invention consists in using a switchable mass at the level of the control device. According to the invention, the mass of the start / stop device is connected to this switchable mass. During a command to start / stop the vehicle (whether real or due to a short circuit to ground), the control device temporarily switches this switchable mass to a connection position to a resistor Rm. In fact, when the read circuit reads the value at its input, it is possible to distinguish the short circuit to the ground of the start / stop member, a start / stop command. In fact, in the absence of a short circuit, the value read when the switchable mass is in the position of connection to the resistor Rm is different from the value read when the switchable mass is simply connected to the vehicle ground. The switching of the mass between two positions, one connected to the vehicle ground and the other connected to a resistor Rm, therefore makes it possible to differentiate surely a short circuit to the ground of the start / stop member and a start / stop control command of the vehicle engine. Advantageously, the values read by the read circuit are voltage values. The present invention also relates to a starting / stopping system of a vehicle engine comprising: - a start / stop device provided with a start / stop member of the vehicle engine and an output to ground, and - a control circuit provided with: a circuit for reading the state of the start / stop member, said system being characterized in that the control device further comprises: a switchable mass comprising a ground switch connected firstly to the ground output of the starting / stopping device and secondly to a mass of the vehicle, said ground switch being adapted to switch between a ground connection position of the vehicle and a position of bonding to a mass resistance. Advantageously, the switchable mass is constituted by a switching member mounted in parallel with the resistor Rm. Advantageously, the switching member is controlled by a computer of the control device. The switching member is preferably a protected electronic transistor. Preferably, a voltage divider bridge is created by the resistor Rm and a resistor Ri_ placed in the reading circuit and connected to the vehicle battery. Other objects, advantages and characteristics of the invention will emerge from the detailed description which follows, by way of non-limiting example, with reference to the appended drawings, in which: FIG. 1 already described schematically represents a system starting! stopping according to the prior art, FIG. 2 is a schematic view showing a starting system! stopping according to the invention, and FIG. 3 is a logic diagram illustrating the diagnostic method according to the invention. As illustrated in FIG. 2, the start / stop system 100 according to the invention comprises: a starting / stopping device comprising: a supply input 1, connected to a light emitting diode (LED) 14 series with a supply resistor RA a control output 2, connected by a conductive track 5 to a start / stop member 4 of the motor of a vehicle itself powered by the supply resistor RA. This start / stop member 4 is preferably in the form of a switch button having two positions. and an output 3 to ground. a control circuit 11 provided with: a control circuit 13 connected to the power supply input 1 of the device 10, a read circuit 15 connected to the control output 2 of the device 10, a mass switchable 20 connected to the output to the earth of the device 10, and a computer 12 driving the control circuit 13 by a control output 121 and the switchable mass by a control output 123. The computer 12 reads by its input of reading 122 the signal value (preferably the voltage) from the control output 2 of the device 10.
    [0002] The control circuit 13 of the control device 11 is constituted by a control switch li connected on the one hand to the battery Vbat of the vehicle and on the other hand to the supply input 1 of the starting / stopping device 10. This switch li is further controlled by the control output 121 of the computer 12. Such a control circuit is called "high side" control circuit (English "high side") because the switch li is placed between the battery and the charge to be controlled. The read circuit 15 comprises a reading resistor Ri_ fed by the battery Vbat of the vehicle and connected to a conductive track 6 connecting the control output 2 of the device 10 and the read input 122 of the computer 12. The control circuits and are of known type and will not be detailed here. The switchable mass 20 according to the invention is constituted by a ground resistor Rm in parallel with a ground switch 21, the assembly being connected on the one hand to the ground outlet 3 of the device 10 and to a mass of the vehicle 16. The ground switch 21 is, in turn, controlled by the control output 123 of the computer 12. The computer 12 can thus control the closing of the ground switch 21, so that the ground output 3 of the device 10 is connected to the ground 16 of the vehicle or open the switch 21 to connect the ground outlet 3 of the device 10 to the ground resistor Rm.
    [0003] The ground switch 21 (switching member) is for example a protected electronic transistor. A possible short circuit to ground DC is represented by two broken lines in Figure 2.
    [0004] The operation of the start / stop system 100 is explained below with reference to FIG. 3. Before any implementation of the diagnostic method according to the invention, the switch 4 is in the open position, the switch li is in closed position and the mass switch 21 is in the closed position.
    [0005] In a step 200 the passage of the switch 4 in the closed position is detected. This detection is performed by the read circuit associated with the computer 12, which reads / measures (step 210) a first voltage value close to zero on the read input 122 of the computer 12. It should be noted that the detection of A voltage value close to zero on the read input 122 of the computer may be due to either a driver pressure on the switch 4 to indicate a start / stop intention of the vehicle or a short DC circuit. to the ground appeared on the conductive track 5. It should also be noted that the voltage value read / measured by the read input 122 is in fact generally between 0 and 2 volts (because it is a noisy value). In the remainder of the description, reference will be made to a value substantially equal to zero volts. As soon as the computer 12 has read / measured a first value of the read input 122 substantially equal to zero, it switches the ground switch 21 to an open position (step 220). This switching is temporary (of the order of 100ps to a few tens of ms). During this switching of the ground switch 21 into its open position, the read input 122 of the computer reads / measures a second voltage value (step 230). In a step 240, the computer 12 compares the first value read / 30 measured and the second value read / measured. If the two measured values are substantially different then the switch 4 has sent a start / stop command and there is no short circuit to the ground on the conductive track 5. In this case the ground switch 21 is switched to its closed position (step 250) and the start / stop system is waiting for a next driver command. If (step 260) the two measured values are substantially equal (to the value of the noise close) then an alert message is sent by the computer to indicate that a short circuit to ground is present on the conductive track 5. L emitted alert can, for example, indicate that the starting device! stop is faulty or specify the exact fault detected so that a competent person can remedy this defect. Once the alert message is issued, the ground switch 21 is switched to its closed position (step 250) and the start / stop system is waiting for a next driver command. It will be noted that the method for diagnosing a ground fault of a start / stop member according to the invention consists of: in a preliminary phase: equipping the control device (11) with a switchable mass (20); ) between two positions and to connect the output to ground (3) of the device (10) start / stop to this switchable mass (20), - during operation of the vehicle, during a start command! stopping: to read (step 210) a first value of the signal present at the input of the read circuit (15) and then, to switch temporarily (step 220) the switchable mass (20) of a first ground connection position (16) ) of the vehicle at a second position of connection to a ground resistor (Rm), to read a second value (step 230) of the signal received by the read circuit (15) during switching of the mass to the resistor (Rm) and, comparing the first and second values (step 240), and - if the first and second read values are substantially different, diagnosing an absence of short circuit to ground, - if the first and second read values are substantially equal, to diagnose (step 260) a short circuit fault to the ground of the starting member! stop (4). The first and second values read are voltage values (in the example described).
    [0006] The ground switch 21 (switching member included in the switchable mass 20) is for example a protected electronic transistor. It should be noted that the opening time of the ground switch 21 is very short, on the one hand because the measurement of the voltage value by the input 122 of the computer takes very little time, but also because during this opening the intensity of the supply current of the light emitting diode (LED) 14 is decreased. As a result, the brightness of the led 14 is slightly decreased as well. So as not to disturb the driver, it is important that the opening time of the ground switch 21 is short so that the variation in light intensity is not perceived by the driver. In fact, the driver can not perceive this decrease in the light intensity of the led because it exists only at the very moment when it presses the switch 4. This led is usually lit as soon as the driver enters the vehicle and Its function is to indicate to the driver where the switch 4 for starting / stopping the engine (which can be very useful, especially at night).
    [0007] Alternatively (not shown) a second light emitting diode may be added for a backlight function of the button for example. It should be noted that in general the values of the supply and ground resistances (respectively RA and Rm) are of the order dl ka. The voltage of the battery Vbat is of the order of 14 V. The reading resistors Ri_ (of the order of 3kCI) and of mass Rm constitute a voltage divider bridge, thus the values read / measured by the read input 122 are the following: - Without pressing the switch 4, the value read is Vbat, - If pressing the switch 4 and no short circuit and ground switch 21 open, the value read is greater than Vbat / 2 (due to the voltage divider bridge). The value read, in this case, is equal to: Vbat * Rm RL RL + Rm 1LED Rm With 'LED the current flowing in the light-emitting diode 14. - If there is an open circuit, the value read is Vbat - If there is a short circuit to the ground (case diagnosed according to the invention), the value read is substantially equal to 0 V (to the defect of shift of the mass and near sound), - If there has a short circuit to the battery, the value read is Vbat. The two critical cases that we wanted to differentiate are the case of the short circuit to the ground and the case of pressing the switch 4. As indicated above, the values read in these two cases are very different (from the order of Vbat / 2 and 0), which allows to dissociate them without problem. The method according to the invention is simple to implement and inexpensive (addition of a resistor Rm and a switch 21, which may also be already present in the computer 12).
    [0008] The short circuit diagnosis thus made is reliable and fast which eliminates any risk of false detection of starting or stopping the engine of the vehicle. Note further that the invention is applicable to a start / stop system whose switch 4 is activated by the battery voltage (and not by the mass as in the example described) and whose light-emitting diode 14 is driven by a control circuit type "low side" ("low side" in English), that is to say in which the switch li would be located between the load and the mass. Naturally, the values indicated for the resistances and for the voltages read at the input 122 of the computer 12 are given for information only and may vary within the scope of the present invention.
    权利要求:
    Claims (7)
    [0001]
    REVENDICATIONS1. Method for diagnosing a ground fault of a starting member! stop (4) adapted to control the starting and stopping of a vehicle engine, said member being part of a device (10) for starting / stopping further comprising an output (3) to ground, said device (10) being furthermore associated with a control device (11) comprising a reading circuit (15) of the state of the start / stop member, said diagnostic method being characterized in that it consists in a preliminary phase: to equip the control device (11) with a switchable mass (20) between two positions and to connect the output to ground (3) of the start / stop device (10) to this mass switchable (20), - during vehicle operation, during a start command! stopping: to read (step 210) a first value of the signal present at the input of the read circuit (15) and then, to switch temporarily (step 220) the switchable mass (20) of a first ground connection position (16) ) of the vehicle at a second position of connection to a ground resistor (Rm), to read a second value (step 230) of the signal received by the read circuit (15) during switching of the mass to the resistor (Rm) and, comparing the first and second values (step 240), and - if the first and second read values are substantially different, diagnosing an absence of short circuit to ground, - if the first and second read values are substantially equal, to diagnose (step 260) a short circuit fault to the ground of the starting member! stop (4).
    [0002]
    2. Diagnostic method according to claim 1 characterized in that the first and second read values are voltage values.
    [0003]
    3. Start / stop system (100) of a vehicle engine comprising: - a starting device (10)! stop equipped with a starter! stopping (4) of the vehicle engine and an output to ground (3), and - a driving circuit (11) provided with: - a reading circuit (15) of the state of the starting / stopping (4) said system being characterized in that the control device (11) further comprises: a switchable mass (20) comprising a ground switch (21) connected on the one hand to the ground output ( 3) of the starting / stopping device (10) and secondly to a mass (16) of the vehicle, said ground switch (21) being adapted to switch between a ground connection position (16) of the vehicle and a bonding position to a mass resistor (Rm).
    [0004]
    4. Start / stop system (100) according to claim 3, characterized in that the ground switch (21) is connected in parallel with the ground resistor (Rm).
    [0005]
    5. Start / stop system (100) according to claim 4, characterized in that the ground switch (21) is controlled by a computer (12) of the control device (11).
    [0006]
    6. Start / stop system (100) according to claim 4 or 5, characterized in that the ground switch (21) is a protected electronic transistor.
    [0007]
    7. Start / stop system (100) according to any one of claims 3 to 6, characterized in that a voltage divider bridge is created by the ground resistor Rm and a read resistor Ri_ of the read circuit ( 15).
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2016070973A1|2016-05-12|Method for diagnosing an earth fault of a start/stop unit of a motor vehicle
    FR2651890A1|1991-03-15|DEVICE FOR DETECTION AND DISCRIMINATION OF OPERATING FAULTS OF AN ELECTRICAL SUPPLY CIRCUIT.
    WO2017129917A1|2017-08-03|Partially redundant electronic control system
    FR2870986A1|2005-12-02|RELAY CONTROL DEVICE FOR DIRECT CURRENT ELECTRICAL APPARATUS
    FR2993221A1|2014-01-17|DEVICE AND METHOD FOR COMMUNICATION BETWEEN AN ELECTRONIC MODULE AND A DETECTION SENSOR COMPRISING A LIGHT SOURCE
    FR2895535A1|2007-06-29|Electrical charge switching device for e.g. automobile locking function, has positive switched supply connected to microcontroller for serving as safety barrier, and interface device permitting to know presence or absence of supply
    EP2699452B1|2020-04-01|Method and system for controlling the stop lights of a motor vehicle, and vehicle with such a system
    FR3033747A1|2016-09-23|DIAGNOSTIC DEVICE
    FR2993222A1|2014-01-17|DEVICE AND METHOD FOR COMMUNICATION BETWEEN AN ELECTRONIC MODULE AND A DETECTION SENSOR IN THE PRESENCE OF A LIGHT SOURCE
    EP2547554B1|2019-05-01|Switching device for steering column of a vehicle
    EP0048647A1|1982-03-31|Electronic adapting circuit for taking in diagnostic information from an electronic control device
    EP2725876A1|2014-04-30|Device for electrical connection of a projector
    EP3202014B1|2018-07-18|Control device for a regulator of a motor vehicle alternator and alternator with corresponding regulator
    EP3744157B1|2022-03-02|Diagnostic method of removable light sources for vehicule
    EP2594422A1|2013-05-22|Method for detecting a blocked accelerator pedal
    EP1660765A1|2006-05-31|Signal failure detection method, whereby the signal represents motor vehicle accelerator pedal depression
    FR2863067A1|2005-06-03|Motor vehicle controlling method, involves activating stoplight with intensity of current lower than threshold value when accelerator pedal is released and with intensity of current greater than threshold value when brake pedal is activated
    FR3018988A1|2015-09-25|SYSTEM FOR CONTROLLING THE ELECTRICAL SUPPLY OF A PLURALITY OF LIGHT SOURCES
    FR3021838A1|2015-12-04|SHORT-CIRCUIT DETECTION ON A SET OF SEVERAL SERIES-CONNECTED LIGHT-EMITTING DIODES
    FR2955902A1|2011-08-05|Automatic internal combustion engine stopping device for motor vehicle, has controller controlling stopping of engine, and control unit permitting output corresponding to one of positions of switch to contact one of inputs of controller
    WO2015155433A1|2015-10-15|System for controlling rear signal lighting for a motor vehicle
    FR3024794A1|2016-02-12|METHOD FOR ACQUIRING SIGNALS, SUCH AS REPRESENTATIVE SIGNALS OF THE STATE OF CONTACTS OF A MOTOR VEHICLE
    WO2008145937A1|2008-12-04|Wheel changing automatic lighting device
    FR2920883A1|2009-03-13|METHOD FOR DETECTING A FAILURE ON A POWER SUPPLY SYSTEM OF AN ELECTRIC LOAD
    FR2664785A1|1992-01-17|Device for monitoring electrical circuits, intended to detect an anomaly in the operation of such a circuit, and application of the said device to a vehicle lighting and/or signalling system
    同族专利:
    公开号 | 公开日
    FR3028049B1|2016-12-09|
    CN107076793B|2020-04-28|
    US20170322250A1|2017-11-09|
    US10215790B2|2019-02-26|
    WO2016070973A1|2016-05-12|
    CN107076793A|2017-08-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20090195205A1|2008-02-01|2009-08-06|Sanyo Denki Co., Ltd.|Motor control system including electrical insulation deterioration detecting system|
    US20120025844A1|2009-06-12|2012-02-02|Nissan Motor Co., Ltd|Connection diagnostic apparatus for ground fault detector|
    JP2013061215A|2011-09-13|2013-04-04|Denso Corp|Earth detector|
    JP2013130536A|2011-12-22|2013-07-04|Seiko Electric Co Ltd|Device and method for detecting earth for direct current circuit|
    JP4062459B2|1998-03-13|2008-03-19|本田技研工業株式会社|Engine stop / start control device and vehicle equipped with the same|
    JP2008128104A|2006-11-21|2008-06-05|Isuzu Motors Ltd|Automatic stopping-starting device of engine|
    KR101113654B1|2010-11-17|2012-02-14|현대자동차주식회사|Ground fault detecting method for parallel structured high voltage system|
    CN102390376B|2011-10-11|2014-07-09|广州汽车集团股份有限公司|Intelligent starting and stopping system of engine and intelligent starting and stopping method for automobile|
    JP5811917B2|2012-03-26|2015-11-11|株式会社デンソー|Starter control device|
    US9911249B2|2012-09-20|2018-03-06|GM Global Technology Operations LLC|Fail operational power system diagnostics|
    JP6252106B2|2013-10-31|2017-12-27|日本電産リード株式会社|Contact maintenance method and inspection device|
    JP5832578B2|2014-04-15|2015-12-16|ファナック株式会社|Motor drive device having failure detection function of motor insulation resistance deterioration detection unit and failure detection method|
    US10001519B2|2015-06-12|2018-06-19|Allegro Microsystems, Llc|Ground reference fault detection in circuits with multiple ground references|US10502786B2|2016-11-18|2019-12-10|GM Global Technology Operations LLC|Vehicle including multiple analog switch monitoring system with simultaneous switch-state detection|
    CN107622644A|2017-09-13|2018-01-23|无锡商业职业技术学院|A kind of acquisition method of novel switched signal|
    CN107565923A|2017-09-13|2018-01-09|无锡商业职业技术学院|A kind of acquisition method of improved open OFF signal|
    JP6603695B2|2017-09-15|2019-11-06|矢崎総業株式会社|Anomaly detection device|
    US11067640B2|2018-06-28|2021-07-20|Lear Corporation|Loss of ground detection system|
    法律状态:
    2015-11-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-06| PLSC| Publication of the preliminary search report|Effective date: 20160506 |
    2016-11-18| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 6 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-22| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1460614A|FR3028049B1|2014-11-04|2014-11-04|METHOD FOR DIAGNOSING A MASS FAULT IN A STARTING / STARTING MEMBER OF A MOTOR VEHICLE|FR1460614A| FR3028049B1|2014-11-04|2014-11-04|METHOD FOR DIAGNOSING A MASS FAULT IN A STARTING / STARTING MEMBER OF A MOTOR VEHICLE|
    PCT/EP2015/002140| WO2016070973A1|2014-11-04|2015-10-28|Method for diagnosing an earth fault of a start/stop unit of a motor vehicle|
    CN201580059694.9A| CN107076793B|2014-11-04|2015-10-28|Method for diagnosing ground fault of starting/stopping member of motor vehicle|
    US15/524,275| US10215790B2|2014-11-04|2015-10-28|Method for diagnosing an earth fault of a start/stop unit of a motor vehicle|
    [返回顶部]