FR2678996A1 - Electronic device for control of an automatic gearbox - Google Patents

Abstract

An electronic control device in a motor vehicle controls the starting or stopping of the engine and the position of an automatic gearbox equipped with an electric actuator. It includes a logic circuit (CL) which manages, in write mode and in read mode, interfaces (I1, I2, I3) with a removable card (board) (20) which is inserted in a play (reading) slot (11) in the dashboard of the vehicle. This removable card (20) is equipped with a numerical keyboard with keys and a chip in which a secret number is preferably memorised. Each key is associated with a specific control. The electronic control device (100) detects the presence of the card (Pres), verifies that an identification number compiled on the keyboard by a user corresponds to the secret number memorised in the chip in order then to authorise a control for starting up or stopping the engine, or a control of the position of the gearbox. The control circuit detects the pressure on a key which it identifies (T), verifies that the control is compatible with authorised operating conditions, then, as a consequence, controls the starting up or stopping of the engine (M/A), or the activation of the electric actuator of the gearbox. The control device manages a display panel (200) for indicating, in particular, the true position of the gearbox. The control device according to the invention makes it possible to group together control members whilst at the same time fulfilling functions of control (checking) and security.

Description

ELECTRONIC BOX CONTROL DEVICE
AUTOMATIC SPEED
The invention relates to an electronic control device for a motor vehicle which combines various driving, safety and monitoring functions. It relates more particularly to the driving of a motor vehicle equipped with an automatic gearbox.

 In the invention, it is sought to improve the comfort of use of the vehicle by rationalizing the implementation of certain control and driving functions borne by the driver. We are also seeking to introduce security functions, such as verifying the driver's identity and sobriety.

 The invention relates to an electronic control device which manages the commands for the position of the primary lever of the gearbox and for starting the engine as a function of safety criteria and of commands which it receives from a removable electronic card provided a numeric keyboard.

This removable electronic card is specific to the vehicle and plugs into a reading slot on the dashboard. The driver selects a command on the crankcase by pressing a key on the keyboard.

 In the invention, the primary lever of the automatic gearbox is preferably actuated by a selector whose linear movement is controlled by an electric actuator.

 The principle of the removable card and the automatic gearbox with electric actuator is described in application 91/01726 filed on February 14, 1991 by the applicant.

 The invention therefore relates to an electronic device for controlling the starting or stopping of an engine of a motor vehicle and for controlling the position of a primary control lever pivoting on a casing of an automatic gearbox, the automatic gearbox comprising a secondary relay lever articulated on the primary control lever and moved in translation by an electric stepping cylinder comprising a motor, the electronic control device being connected to a removable electronic card inserted in a reading slot provided on a dashboard of the vehicle, the removable electronic card comprising an electronic chip, a key for controlling the starting of the engine of the vehicle, a key for controlling the stopping of the engine of the vehicle, keys for controlling a reference position of reverse, parking, neutral, speed 1, speed 2, speed 3 and direct engagement of the primary gear lever speed control and a control key to validate the reverse position control keys and engine start or stop control keys, the removable electronic card delivering for each key, a corresponding key output signal on a first connector connected to the electronic control device, and delivering input / output signals from the electronic chip on a second connector connected to the electronic control device, pressing a control key causing the appearance of a pulse on the signal corresponding key output device, electronic control device characterized in that it comprises a logic circuit and a first interface circuit at the output of the first connector, comprising a circuit for receiving the control key output signals, for detecting a pulse on one of the control key output signals, and to deliver a signal of presence of a pulse and a corresponding key code, the logic circuit activating an engine start / stop signal, for a key code corresponding to a key to command a start or a key to command a stop, or controlling the motor of the electric actuator of the gearbox, for a key code corresponding to a key to control a position of the primary gearbox lever.

 In the invention, when the driver inserts the removable card into the reading slot, he must then dial on the keyboard an identification number which the electronic control device will compare with a secret number, to allow the use of the menu.

In an improvement, the removable electronic card comprises an electronic chip with a microprocessor and at least one non-volatile memory, electrically programmable, which contains the secret code and which is read by the electronic control device.

 According to one embodiment of the invention, the electronic control circuit receives information from the gearbox. In one example, it receives gearbox fault information and alerts the driver using a display or warning light.

The invention will be better understood on reading the description which follows, given by way of nonlimiting illustration of the invention, with reference to the appended drawings in which
FIG. 1 is a layout diagram of various elements of an automatic gearbox used in the invention,
FIG. 2 is a front view of a removable electronic card according to the invention,
FIG. 3 is a sectional view of the card in FIG. 2 inserted into a reading slot made in a dashboard,
- Figure 4 is a block diagram of an electronic control device according to the invention.

 The automatic gearbox 31 shown in FIG. 1 comprises a primary control lever 32 pivoting around a point of articulation 33 on the casing 34 of the gearbox 31. On the primary lever 32 is articulated a secondary relay lever or selector 35. The selector 35 is moved in translation by an electric stepping cylinder 36 mounted on the casing 34. A feedback potentiometer Pr, parallel to the selector 35, has its cursor secured to the selector 35. It thus delivers information of voltage representative of the selector position 35.

 The linear movement of the selector 35 corresponds to a rotary movement of the primary lever 32. The angular movement of the latter corresponds to the selection of the conventional operating positions of the automatic gearbox 31. In the example of FIG. 1, the classic positions of gearbox 31: reverse (R), parking (P), neutral (N), speed 1 (V1), speed 2 (V2), speed 3 (V3) and direct drive (D).

 The notations R and D come from the well-known Anglo-Saxon terms "reverse" and "drive" corresponding to the expressions reverse "and" direct drive ". To each of the operational positions of the speed therefore corresponds a known value of the voltage delivered by the feedback potentiometer Pr secured to the selector 35.

 A removable electronic card according to the invention is shown in FIG. 2. It comprises a digital keyboard 22 on a front face 23 and an electronic chip 21, of the type used in bank or telephone cards, preferably inserted on a rear face 24 from card 20.

The numeric keyboard 22 includes numbered keys, each assigned to a selection of a command from the device of the invention. In the example in Figure 2, the keys are divided into three columns and, starting from the right column, the keys are numbered and assigned as follows, starting from the bottom right column: 1 / V1
2 / V2
3 / V3
4 / R middle column: 5 / D
6 / N
7 / P left column: 8 / C
9 / M
0 / A
The keys numbered 1 to 7 are assigned to the gearbox position selection controls. Each of these keys therefore carries the reference of the position (R, D, N, V1, V2, V3 or D) which it allows to select.

The keys numbered 9 and 0 are respectively assigned to the start M and stop A commands of the vehicle engine.

 Finally, the key numbered 8 is assigned to a function for validating the selection of reverse gear (key 4 / R). This validation is an electronic equivalent of the reverse gear safety mechanism on a conventional manual gear selection lever. In practice, you must first press the 8 / C control button, then, without releasing this 8 / C button, press the 4 / R reverse button to control reverse.

 Preferably, the M / 9 start and O / A stop buttons of the engine will also be controlled by this 8 / C control button.

 The keys of the keyboard each deliver an impulse signal, the delivery of an impulse of a certain duration corresponds to the pressing of the key during this same duration.

 The removable card 20 also includes a display part of the keyboard, with an LED LO to L9 arranged on each of the keys 0 to 9.

 The impulse signals from the keys or the LED commands arrive on a CX connector at one end of the card 20: the CX connector therefore has 10 outputs marked s0 to s9 corresponding to the electrical outputs of keys 0 to 9 and 10 inputs marked eO to e9 corresponding to the LED indicator commands LO to L9. The CX connector also has an elO input looped back to an s10 output.

 In the following description, the references s0 to s10, SO to S10, eO to elO, EO to E10 denote either the electrical terminals and the corresponding electrical signals. This will also apply to the references of the other electrical terminals, which will therefore also designate the corresponding electrical signals.

 Preferably, the chip 21 on the rear face of the card 20 is placed at the edge of the connector CX.

 In the example of FIG. 3, the removable card 20 is inserted horizontally by its connector CX into a reading slot of a reader 11 placed on a dashboard 12 of the vehicle. In the following, the expression "reading slot" will be used to designate the reader 11 of the removable card, to use the expression used in the patent application 91/01726 already mentioned. A chip reader 13 is provided on a lower edge of the reading slot 11.

 A connector C1 formed at the bottom of the reading slot 11 and a connector C2 of the chip reader 13 are connected to an electronic control device 100. The latter is mainly placed behind the dashboard 12, with all of the electronic circuits. of the vehicle. However, it includes a display 200 formed on the dashboard 12.

 The reading slot 11 could be made in the usual place of the manual selection lever or on a satellite. The chip reader 13 could be placed outside of the reading slot 11.

 When the removable card 20 is inserted into the reading slot 11, its front face 23 is on the top.

The CX connector is plugged into the C1 connector.

The chip 21 on the rear face 24 of the card 20 comes into contact on the chip reader 13.

 Preferably, the removable card 20 is held by a removable flexible clip system 10 engaged on an edge of the front face 23 of the removable card 20, opposite the connector CX.

The connections between connectors C1 and CX are detailed in Figure 4. At the output signals s2, sl, s5, s3, s4, s7, s9, s6, sO and s8 of the CX connector, the connector C1 matches on the side of the electronic control device 100, the signals SO, S1, S2,
S3, S4, S5, S6, S7, S8 and S9.

To the input signals e2, el, e5, e3, e4, e7, e9, e6, eO and e8 of the connector CX, the connector C1 matches on the side of the electronic control device 100, the signals EO, El, E2, E3, E4, E5, E6,
E7, E8 and E9.

 The electronic device 100 of the invention is detailed in FIG. 4. When the removable card 20 is inserted in the reading slot 11, the electronic device 100 is connected to the removable card 20 by the connector C1 of the reading slot 11 and via the connector C2 of the chip reader 13. I1 is also permanently connected to a display circuit 200 and to an analog circuit for controlling the motor M of the electric actuator 36 of the gearbox 31 (FIG. 1).

 The electronic device 100 comprises a logic circuit CL and several interface circuits (I1, I2, I3, I4) which connect the logic circuit to the various elements of the device: the removable card 20, the display 200 and an analog circuit 300.

 The logic circuit is supplied by a permanent voltage VPerm from the vehicle and receives a clock signal.

 The logic circuit CL is connected to the removable card 20 via three interface circuits I1, I2 and I3 corresponding respectively to the interfaces with the output signals SO to S9 of the connector C1, with the input signals EO to E9 of the connector C1 and with the input / output signals of the connector C2 of the chip reader 13.

 In addition, the logic circuit CL receives directly on an input Pres, an output S10 of the connector C1 and delivers directly on an input E10 of the connector C1, a presence voltage U Pres which corresponds in the example, to the electrical ground of the circuit CL logic.

 The interface circuit I1 comprises a coding circuit 101, a sampler 102 and a memory circuit 103.

 The coding circuit 101 receives on inputs i0-i9 the outputs SO-S9 of the connector C1.

In the example of FIGS. 2 and 4, there are the correspondences inputs of the outputs of the keys of the circuit 101 connector C1 keyboard
i0 SO 2 / V2
il 81 1 / V1
i2 82 5 / D
i3 s3 3 / V3
i4 s4 4 / R
i5 55 7 / P
i6 86 9 / M
i7 S7 6 / N
i8 88 O / A
i9 89 8 / C
Preferably, to carry out validation with the validation key 8 / C on the reverse 4 / R, engine start 9 / M or engine stop keys.
O / A, three AND gates are placed before the coding circuit 101. A first gate receives the signals S4 and S9 corresponding to the keys 4 / R and 8 / C. It delivers a validated reverse gear output Rc connected to the input i4 of the circuit 101. A second door receives the signals S6 and S9 corresponding to the keys 9 / M and 8 / C. It delivers a validated start output Mc connected to the input i6 of circuit 101. A third gate receives the signals S8 and S9 corresponding to the keys O / A and 8 / C. It delivers a validated stop output Ac connected to input i8 of circuit 101.

 The coding circuit 101 ensures a scanning of its inputs i0-i9, to detect the presence of a pulse on an input. When it detects a pulse on an input (active input), it delivers as output a pulse presence signal di and an output address J of the rank (0-9) of the active input. If there are several active inputs at the same time, it only considers the one with the lowest rank. In this example, the signal S9 corresponding to the validation key 8 / C is connected to an input i9 of higher rank than the rows of the inputs i4, i6 and i8 corresponding to the validated keys Rc, Mc, Ac. Thus, during a simultaneous pressing of the validation key 8 / C and for example of the reversing key 4 / R, only the row (2) of the input (i2) of the circuit 101 associated with the validated key Rc is coded at the output of circuit 101, that (9) of the validation key is ignored. Address J of the rank of an active input is coded on 4 bits j0-j3.

 Preferably, the pulse presence signal di is sampled at low frequency to eliminate any interference on the inputs i0-i9. A sampler 102 receives the pulse presence signal di and delivers a sampled pulse presence signal Di. The sampler 102 receives from the logic circuit CL a low frequency clock signal he and a reset reset signal.

 The address J of the rank of the active input, hereinafter called the active rank, is preferably stored in a memory circuit 103. The bits j0-j3 arrive at the input of an input register re of the memory circuit 103. The sampled pulse presence signal Di is used as the tilt signal (latch in English literature) of the memory circuit 103. On activation of the signal Di, the content of the input register re is switched to an output register rs whose output bits arrive on inputs t0-t3 of the logic circuit CL. These bits t0-t3 form the key code T.

 The interface circuit I2 has inputs k0-k3 controlled by the logic circuit CL and outputs m0-m9 connected to the inputs EO-E9 of the connector C1. The logic circuit CL sends on the 4 input bits k0-k3 an address K of an output rank (0 to 9) to be activated.

The interface I2 allows the logic circuit to control the display of the keyboard of the card 20 (LEDs LO-L9).

The interface I2 therefore delivers output signals m0-m9, preferably in open collector, so as to directly activate the LEDs LO-L9 without going through a power circuit. In the example (Figures 2 and 4), we have the following correspondence output from the inputs on the LEDs of the circuit I2 connector C1 keyboard
mO EO L2
ml El L1
m2 E2 L5
m3 E3 L3
m4 E4 L4
m5 E5 L7
m6 E6 L9
m7 E7 L6
m8 E8 LO
m9 E9 L8
Interface circuit I3 receives from logic circuit
CL a read / write signal L / E and exchanges with it at least 4 bits of information z0-z3. I1 is connected with the connector C2 by a control bus BC and a data bus BD. This interface I3 is used in the preferred case of a removable card 20 with an integrated chip 21. The integrated chip 21 is of the banking type with at least one non-volatile memory programmable to contain the secret number and possibly a microprocessor.

The display 200 is controlled by the logic circuit
CL which supplies it with the message to be displayed and exchanges control signals with it. In one example, the display 200 uses 4 bits of data DO-D3 which can be read or written by the logic circuit CL, according to a command R / W of selection to write / read.

Conventionally, it receives from the circuit CL a box selection command AS and delivers an authorization signal E.

 The analog circuit 300 includes an analog voltage switch 301. In the example shown, the switch switches to 1 output channel Vc, one of the 16 input channels MO-M15 according to an AM address which it receives on 4 wires d address AMO-AM3 and which is supplied by the logic circuit CL.

Reference voltages UP, UD, W1, W2, W3, UR and UN which correspond respectively to the positions of the primary lever P, D, V1, V2, V3, R and N, are respectively connected to the input channels MO,
M2, M3, M8, M9, M12 and M1S of switch 301. There are no particular distribution constraints, but preferably the channel MO, which corresponds to address 0 of switch 301, is assigned to the reference voltage from neutral or parking position. Thus, in the example of FIG. 4, at the first power-up, it is the voltage reference UP which is switched to the output channel Vc of switch 301. It is recalled that once installed in the vehicle , the control device of the invention is permanently supplied with a voltage VPerm.

 In known manner, each voltage reference is adjusted by potentiometer. The voltage reference adjustment circuit is not shown in FIG. 4.

 The analog switch 301 delivers an output voltage Vc which corresponds to a position setpoint which the selector 35 of the gearbox 31 must rally to bring the primary lever 32 to the desired position. The instantaneous position of the selector 35 is moreover given by the actual voltage Vr on the output cursor of the feedback potentiometer Pr (FIG. 1). In FIG. 4, the mechanical connection between the cursor of the potentiometer Pr and the selector 35 is represented by a line connecting the potentiometer Pr to the motor M of the electronic stepping cylinder.

A comparator AMP1 with power amplifier receives on its positive input +, the setpoint voltage
Vc and on its negative input -, the actual voltage Vr.

Conversely, a comparator AMP2 with power amplifier receives on its positive input +, the actual voltage Vr and on its negative input -, the setpoint voltage Vc. The respective outputs V1 and V2 of the comparators AMP1 and AMP2 feed a circuit of four transistors which ensures the polarization of the motor
M of the electric jack of the gearbox.

 The motor M has two polarization terminals b and b '.

A first transistor T1 is connected between the output V1 of the comparator AMP1 and the first polarization terminal b.

 A second transistor T2 is connected between the output V2 of the comparator AMP2 and the first bias terminal b.

 A third transistor T3 is connected between the output V2 of the comparator AMP2 and the second polarization terminal b '.

 A fourth transistor T4 is connected between the output V1 of the comparator AMP1 and the second polarization terminal b '.

If the voltage in V1 is greater than the voltage in
V2 (ie if the setpoint voltage is greater than the instantaneous voltage), only the transistors T1 and T3 drive and make the motor turn, for example clockwise.

 If it is the voltage in V2 which is higher, only the transistors T2 and T4 drive and cause the motor to turn counterclockwise in the example.

 If the voltages in V1 and V2 are equal, the circuit is balanced and the motor does not run: the setpoint has been reached.

 In the invention, an analog / digital converter I4 is placed at the output of the feedback potentiometer Pr of the analog circuit 300.

It delivers a digital signal N for example on 8 bits to the logic circuit CL. This digital signal is the digital value of the actual voltage Vr delivered by the potentiometer Pr, to be compared with the reference voltages of the gearbox position.

 The circuit CL also receives a fault signal FB delivered by the gearbox itself.

 Finally, the circuit CL commands an on / off signal M / A from the car engine starter.

To manage the various signals and interfaces, the logic circuit CL has storage circuits and correspondence tables. For example, it uses a RAM 400 memory to temporarily store the data it reads or writes, and a PROM 401 memory which contains correspondence tables:
- T key code associated with each reference voltage (UR, UP, UN, UV1, W2, W3, VD)
- AM address of each reference voltage on analog switch 301,
- rank (0-9) of K output command for a keypad indicator on the I2 interface associated with each key code
T.

 - table of display data for each of the messages to be controlled on the display circuit 200.

 The logic circuit CL also has counters 402.

The logic circuit CL of the electronic control device 100 described then performs the following tasks
An initialization task, which includes
- Detecting the presence of the removable card 20 in the reading slot 11. In fact, when the connector CX is inserted in the connector C1, the voltage UPres delivered by the logic circuit CL is copied to the input Pres of the circuit E10-S10 connection loopback logic, the elO input of the CX connector being connected to the s10 output of the connector
CX. The logic circuit CL therefore detects the presence of the card, when it recognizes the voltage UPres on its presence detection input.

 - when the logic circuit has detected the presence of the card, it preferably waits for a secret number dialed on the keyboard of the card 20.

 In one example, this number is made up of four digits. The logic circuit CL therefore waits to receive successively four sampled signals Di for detecting the presence of a pulse on the inputs i0-i9. At each signal Di, it will read the corresponding key code T on the inputs t0-t3 from memory circuit 103, then it resets (resetting) the sampler 102. When it has received the complete number (four key codes in example), it compares this number dialed by the user with a number which is stored in an example in the storage circuit 401. In a preferred example, it compares the number dialed by the user with a number stored on the chip 21 of card 20; in this case, it makes a request to read (L / E) this number stored on the chip 21, via the interface I3 and the chip reader 13.

 Preferably, provision is made for the logic circuit CL to pilot the display 200 to indicate to the driver if the identification number has been recognized, if he is entitled to another test, etc. It can also be provided that the user has a time TO for each test.

The time TO can be 15 seconds for example. This time constraint associated with the dialing of the number can correspond to an ethyl test which, if it is not satisfactory, can prevent any new test for a certain time T1, for example a few hours. For these time functions, the logic circuit
CL uses the counters 402, which it initializes at the desired values of TO and T1, for example on reception of a signal Di for the time TO, on failure of the comparison for the time T1.

 - if the user number is recognized and if it was dialed in a time less than TO, the logic circuit CL leaves the initialization task to enter an operational mode, in which the user can start the engine of the vehicle, or modify the position of the primary gearbox lever.

In the operational mode, the logic circuit CL ensures the following operation
Each time a key is pressed on the keyboard, a corresponding pulse is detected by the interface circuit I1, which sends to the logic circuit CL a sampled signal Di of presence of pulse. The logic circuit CL will read the corresponding key code T on its inputs t0-t3 and then resets the sampler 102 (reset).

 If the key code read corresponds to that of a command to start or stop the vehicle, it activates accordingly with a high level or a low level, an on / off M / A signal to an engine starting member. of the vehicle. If it is a gearbox position command, it will read from a correspondence table the AM address of the associated reference voltage, then write this AM address to the address bits AMO- AM3 of the analog switch 301 for controlling the electric cylinder motor. Thus, according to the already described operation of the analog circuit 300, the cylinder motor is actuated to move the selector of the gearbox and bring the primary lever to the commanded position.

 After having written the address AM on the switch 301, while waiting for the position to be rejoined, provision is preferably made for the logic circuit to permanently read the output N of the interface I4 for digital conversion of the real voltage Vr corresponding to the position of the gearbox. I1 compares this output N with the reference voltages of the positions R, P, N, V1, V2, V3, D and, as soon as there is equality with one of them, it controls the display 200 to display this position . In an example, if the actual position of the gearbox is the parking position P and the commanded position is the direct drive D, the display will successively indicate the intermediate positions P, N, V1, V2, V3 and D of the lever gearbox primary; when the logic circuit CL reads on the input N a voltage corresponding to the reference voltage of the commanded position (D in the example), it stops reading this input N.

 Preferably, the key code T is read twice, for example at 0.4 second intervals. After only the sampler 102 is reset to zero. In this case, the key code is only taken into account if the two readings give the same result. This procedure avoids the problems of rebound of the storage circuit 103.

It is expected that whenever the logic circuit
CL takes into account a key code T, (after 2 readings giving an identical result), it controls the lighting of the indicator of the corresponding key on the keyboard, via the I2 interface. In one example, it copies the key code T (t0-t3) to the input bits k0-k3 of the interface I2.

 For safety reasons, if the key code corresponds to a command to start or stop the engine, or reverse, the logic circuit will read the digital voltage N delivered by the interface I4 to deduce the actual position of the gearbox. If this actual position is different from the parking or neutral positions, the logic circuit will not control the new position and will cause the display circuit 200 to display a warning message for the driver.

 The logic circuit CL described is advantageously a microprocessor provided with parallel interfaces (t0-t3, kO-k3, DO-D3, ...), clocks (he), counters 402 (TO, T1), lines interrupt (Di, Pres) and analog digital converters (ADC). Such microprocessors are known, facilitate integration and make the control system of the invention flexible and configurable.

Finally, additional keys can be provided on the keyboard, either for additional gearbox positions, or for additional "keyboard" functions
- button cancellation
- writing of information on the chip by the user or the vehicle manufacturer (national identity, vehicle registration, etc.), or by the logic circuit (mileage, gearbox fault, etc.).

Claims (22)

 1. Electronic device for controlling the starting or stopping of an engine of a motor vehicle and for controlling the position of a primary control lever (32) pivoting on a casing of an automatic gearbox (31) , the automatic gearbox (31) comprising a secondary relay lever (35) articulated on the primary control lever (32) and moved in translation by an electric stepping cylinder (36) comprising a motor (M), the electronic control device being connected to a removable electronic card (20) inserted in a reading slot (11) provided on a dashboard (12) of the vehicle, the removable electronic card (20) comprising an electronic chip (21) and control keys including a control key for starting the engine of the vehicle (9 / M), a control key for stopping the engine of the vehicle (O / A), control keys (1 / seen, 2 / V2 , 3 / V3, 4 / R, 5 / D, 6 / N, 7 / P) of the reference positions of the primary lever of the gearbox (31), in particular a reverse (R), parking (P), neutral (N) and gear (V1, V2, V3, D) control button and a control button (8 / C) for validating control keys, electronic control device characterized in that it is connected to a first connector (C1) for receiving key output signals (s0-s9) delivered by the removable electronic card (20 ), pressing a control key causing the appearance of a pulse on a corresponding key output signal, and a second connector (C2) for receiving input / output signals from the electronic chip (21) of the removable electronic card (20), and in that it comprises a logic circuit (CL) and a first interface circuit (I1) at the output of the first connector (Cl), comprising a circuit (101) for receiving the signals from command key output (s0-s9), to detect a pulse on one of the com key output signals command (s0-s9), and to deliver to the logic circuit (CL) a signal for the presence of a pulse (di) and a corresponding key code (T), the logic circuit (CL) activating an on / off signal from the motor (M / A), for a key code corresponding to a key to control a start (9 / M) or a key to control a stop (O / A), or controlling the motor (M) of the electric actuator (36) of the gearbox (31), for a key code corresponding to a key for controlling a position of the primary lever (32) of the gearbox (31).  2. Electronic control device according to claim 1, characterized in that the logic circuit (CL) comprises a presence input (Pres) of the logic circuit connected to a first output (S10) of the first connector (C1), and an output of presence voltage (UPres) connected to a first input (E10) of the first connector (Cl), the removable electronic card inserted in the reading slot (11) having means (e10, silo) for looping back the first input (E10 ) on the first output (s10) of the first connector (C1), the logic circuit thus detecting a presence of the removable card (20) in the reading slot (11).  3. Electronic control device according to claim 1 or 2, characterized in that a feedback potentiometer (Pr) integral with the selector (35) of the gearbox (31), delivers an actual voltage (Vr) representative of an actual position of the gearbox.  4. Electronic control device according to claim 3, characterized in that it comprises an analog / digital converter (I4) of the real voltage (Vr) which delivers a corresponding digital value (N) to the logic circuit (CL), the logic circuit comprising means for deducing from this corresponding numerical value, the real position of the gearbox.  5. Electronic control device according to claim 4, characterized in that for a key code (T) corresponding to the pressing of a control key for starting the engine (9 / M), or stopping the engine (O / A), the logic circuit (CL) activates a signal to start or stop the engine (M / A), if the actual position of the gearbox corresponds to a parking position (P) or neutral (N ).  6. Electronic control device according to claim 4, characterized in that for a key code (T) corresponding to the pressing of a reverse gear position key of the gearbox (4 / R), the logic circuit (CL ) activates a gearbox reverse position command, if the actual gearbox position corresponds to a parking (P) or neutral (N) position.  7. Electronic control device according to claim 1 or 2, characterized in that the first interface circuit (I1) comprises a circuit for sampling (102) at low frequency (he) the presence signal (di) of a pulse delivered by the circuit for receiving (101), and for delivering to the logic circuit (CL) a sampled signal (Di) of presence of a pulse  8. Electronic control device according to claim 7, characterized in that the first interface circuit (I1) further comprises a circuit for memorizing (103) the key code (T) delivered by the circuit to receive (101), memorizing the key code being triggered on reception of a sampled signal (Di) of presence of a pulse.  9. Control device according to claim 8, characterized in that the logic circuit (CL) comprises means for carrying out two readings of the key code (T) on reception of a sampled signal of presence of a pulse (Di) and to verify that the two readings give the same result, before taking into account the command associated with the key code (T) thus validated.  10. Electronic control device according to claim 3, characterized in that it further comprises an analog circuit (300) for controlling the motor (M) of the electric actuator (36), comprising an analog switch (301) for switching on a setpoint voltage output (Vc) one of the reference voltages (UP, UD, W1, UV2, W3, UR, UN) corresponding to the reference positions of the gearbox (P, D, V1, V2, V3, R, N), the actual position of the gearbox corresponding to the actual voltage (Vr), a difference between the setpoint voltage (Vc) and the actual voltage (Vr) controlling a polarization of the motor (M) for bring the gearbox to a new position corresponding to the setpoint voltage, the logic circuit controlling on address bits (AMO-AM3) of the analog switch (301), an address (AM) of a corresponding reference voltage to a key code (T).  11. Electronic control device according to claim 4, characterized in that it comprises a display (200) for displaying the actual position of the primary lever of the gearbox.  12. Electronic control device according to claim 11, characterized in that the logic circuit (CL) comprises means for receiving gearbox fault information (FB) from the gearbox, and for controlling a display of the fault on the 'display (200).  13. Electronic control device according to claim 1, characterized in that an indicator (LO-L9) is placed on each of the control keys of the removable electronic card and that the control device comprises a second interface circuit (I2) to control an indicator on the control key corresponding to the key code (T) read by the logic circuit (CL).  14. Electronic control device according to claim 13, characterized in that the second interface circuit (I2) is controlled by the logic circuit (CL) which sends it the key code delivered by the first interface circuit (II).  15. Electronic control device according to claim 1, characterized in that it comprises a third interface circuit (I3) connected to the second connector (C2), for reading or writing on the electronic chip (21) of the removable card (20 ).  16. Electronic control device according to claim 15, characterized in that the keys of the removable card are on a front face (23) and the chip (21) on a rear face (24).  17. Electronic control device according to claim 16, characterized in that a chip reader (13) connected to the second connector (C2), is placed on a lower edge of the reading slot (11) and that the electronic chip (21) is contacted on the chip reader (13) when the removable card is inserted into the reading slot (11).  18. Electronic control device according to claim 2, characterized in that the keys of the removable card are numbered, and that the logic circuit (CL) which has detected a card presence, then waits for a number dialed by a user with the numbered keys on the removable card (20) to validate the number dialed by comparison with a secret number, a validated dialed number then allowing key codes corresponding to commands to start the engine or position of the primary control lever to be taken into account (32) of the gearbox (31), an invalidated dialed number does not allow it.  19. Electronic control device according to claim 18, characterized in that it comprises a third interface circuit (I3) connected to the second connector (C2), for reading the secret number on the electronic chip (21) of the removable card ( 20).  20. Electronic control device according to claim 18, characterized in that the logic circuit (CL) controls a counter (402) to measure the time taken by a user to dial a number, the logic circuit (CL) invalidating a dialed number in a time greater than a first time value (TO).  21. Electronic control device according to claim 18 or 20 for an invalidated dialed number, characterized in that the logic circuit (CL) controls a counter (402) to prevent a number dialed by a user from being taken into account before a expiration of a second time value (T1).  22. Electronic control device according to claim 1, characterized in that the logic circuit comprises a microprocessor and volatile (400) and non-volatile (401) memory circuits.