CN1094560C - Method and device for controlling idle speed of engine - Google Patents

Abstract

A method and an apparatus for controlling the idle operating conditions of an internal-combustion engine of a motor vehicle, upon variation in the power drawn from the voltage generator (W4) by the electric circuit (L-BA). The running speed of the engine is detected by a logic control unit (ME), for example a microcontroller, in relation to the frequency of the generator voltage within a predefined running speed range; by the same logic control unit (ME) the connected or disconnected state of the alternating-current electric load (L) of the vehicle is detected and, depending on the information received regarding the connected or disconnected state of the electric load (L) to the voltage generator (W4) and the running speed of the engine, the logic control unit (ME) causes activation or deactivation of an electronic control switch (SCR3 - figure 4) to connect the voltage generator (W4) to earth.

Description

Be used to control the method and apparatus of idle speed of engine

The present invention relates to electronics by means of described Motor Vehicle according to voltage generator in the variation aspect the power traction, be used for a kind of method and a kind of device of idle running working state of the internal-combustion engine of controller motor-car.

Although the present invention can be used on the motor vehicle electronic system of any kind, preferably the present invention is used in the motor vehicle electronic system of a series of voltage regulators that the phase control type is housed, and it constitutes the theme of the common unsettled disclosures in Italian patent application of same claimant.

When the energy of varying number is discharged by the electrical load of vehicle, at electric bicycle, exist the problem of the idle running working state of correct maintenance motor on scooter or the low-power motorcycle, the idle running working state of motor also claims " idle speed of engine

With regard to the sort of motorcycle mentioned above, these states may be summarized to be car light basically and open or close, perhaps more general says that the AC load by the voltage generator power supply is in coupled condition or off state, and voltage generator is generally firing circuit required electric energy is provided.

Therefore, in the sort of Motor Vehicle mentioned above, be the state of opening if idle speed of engine is set at such as lamp, when lamp is shut and since energy discharge less amount some, motor trends towards increasing a little its speed; On the other hand, be the state that is closing if idle speed of engine is set at lamp, motor trends towards reducing its speed when lamp is opened, and is accompanied by the danger of stall.

This problem always is connected to a load that has with sample value by the alternating current (a.c.) by the voltage regulator output that provides usually in the motor vehicle electronic system at present, is solved with the power that keeps in fact not changing by motor output.

Basically, this problem is passed through switch, solved by means of a suitable break-in switch, the interchange of voltage regulator output or be connected to automotive lamp or be connected to the resistance of a suitable resistance, it keeps being connected with voltage regulator at the motor run duration all the time.

Therefore this known system clearly, although solved the idle speed of engine problem, in fact with regard to parts, because the surcharge of resistance and required lead, and with regard to energy consumption because for the constant power supply of the racing speed state resistance that keeps motor, the two is all wasted, though except continuous energy consumption-when lamp is closed-also cause more energy to be drained and bigger fuel consumption takes place thereupon by motor, environmental pollution is increased the weight of.

Therefore need find out a kind of solution of idle speed of engine problem, it can make problem above-mentioned be overcome.

Therefore, a kind of method and a kind of device that the purpose of this invention is to provide the idle running working state that is used to control internal combustion engine of motor vehicle, produce a more useful economically solution thus, it under any circumstance makes the loss of energy and the consumption of fuel reduce, and helps to reduce the factor that influences environmental pollution thus.

By means of a kind of method and a kind of device that is used to control idle speed of engine according to the present invention, above-mentioned purpose can be implemented.

According to a first aspect of the invention, a kind of method that is used to control the racing speed of internal combustion engine of motor vehicle is provided, its electronics is included in an electrical load that is connected to a voltage generator winding under the control of a voltage regulator by means of a manual operable switch device, is characterised in that its step:

The running speed of the motor that-detection is relevant with the electric voltage frequency that is provided by the voltage generator winding;

-detect about the connection of electrical load and the information of off state by logic control element; And

-according to the running speed of motor and being connected and the information of off state about the electrical load that detects by described logic control element, make the voltage generator winding earth selectively or be connected to the electronics of Motor Vehicle, to keep the idle running working state of motor.

According to second side of the present invention and, a kind of device that is used for controller motor-car idling of IC engine rotating speed is provided, its electronic circuit comprises an AC load that can be connected to a voltage generator by a manually operated switch gear and voltage regulator, be characterised in that and comprise a logic control element that is used to control idle speed of engine, it is operatively coupled to voltage regulator and described switch gear, and preset to detect the engine running speed relevant with the generator electric voltage frequency, or the connection and the off state of detection electrical load, described control unit is according to the running speed of motor and being connected or off state of electrical load, by further default, start an electronic switch that is used for coupling the generator to the groun with during the off state of the AC load of described circuit.

Be used to control general characteristic and some most preferred embodiments of the method and apparatus of idle speed of engine according to the present invention, will describe more fully with reference to the accompanying drawings at this paper, wherein:

Fig. 1 is the total figure that is used to control a kind of device of idle speed of engine according to the present invention;

Fig. 2 shows one first embodiment of a control gear of a series of phase control type voltage regulators that are used for the AC and DC load;

Fig. 3 shows the sketch of control gear of voltage regulator that use only is used for a phase control series type of AC load;

Fig. 4 at length shows the logic element electrograph that is used to control idle speed of engine, constitutes the part according to Fig. 2 and 3 shown devices;

Fig. 5 shows the 3rd embodiment of device that another utilization is used for a series of phase control type voltage regulators of AC and DC load;

Fig. 6 shows the cubic case of device, and this device has utilized a series of phase control type regulators that only are used for AC load again;

Fig. 7 shows the detailed electrograph of a logic element that is used to control idle speed of engine, and its constitutes the part according to Fig. 5 and 6 shown devices;

Shown in Figure 8 is the square-wave output voltage that is used for the generator of definite engine running speed.

Fig. 1 has represented to be used to according to the present invention to control a kind of total figure of device of the idle running working state of internal combustion engine of motor vehicle, the target that it is suitable for realizing is above mentioned.

This device comprises a voltage regulator VR of any adequate types that can control the voltage VG that is exported by a voltage generator, voltage generator is represented by its winding W4 and by means of one first controlled electronic switch SCR1 and a manual operation switch device IT, be AC load L power supply, this AC load L for example is made up of the head lamp that this device is mounted Motor Vehicle thereon usually.The electronics of Motor Vehicle also comprises a power-supply battery BA in this case, and the latter, is powered by means of one second control electronic switch SCR2 in self known mode by generator winding W4.

Connected by a control unit ME who is used to control idle speed of engine according to device shown in Figure 1, it can finish following function:

-by means of wiring 10, detect the running speed of the relevant motor of the voltage VG frequency that produced with winding W4 by voltage generator, be connected to engine shaft the rotor operation of voltage generator;

-by means of wiring 11, detect AC load L, be headlamp for vehicles basically, whether be connected, be to connect or disconnection promptly at race of engine duration of work head lamp;

-trigger electronic switch SCR3 so that disconnect or load makes the winding W4 ground connection of generator when being disconnected at head lamp, so that discharge electric energy, regulate the idling conditions of motor thus with the braking internal-combustion engine.

With reference to figure 2, we consider first method now, by utilizing a break-in switch I T, determine that automotive lamp opens or close, and perhaps more at large, AC load L is in coupled condition or off state.

The a series of phase control type voltage regulators that are used for AC load (AC) and DC load (DC) in the example of Fig. 2 are used, described regulator constitutes the part of co-pending patent application as previously mentioned, and therefore its major component is narrated hereinafter.

As appreciable in this drawing, voltage regulator consists essentially of by reference letter A, B, C, D, E, F ', H, some function blocks that N indicated and will narrate respectively, be used to control the voltage VG from the coil W4 output of a voltage permanent magnetism generator, this voltage permanent magnetism generator is a Motor Vehicle circuit supply of equipment usually.

In Fig. 2, ME represents to be used to control the unit of idle speed of engine again, it is by means of wiring 10, voltage VG by generator winding W4 output, reception is about the first information of engine running speed, and by means of wiring 11, by break-in switch I T, position according to switch I T oneself sets receives about the connection of load L and another information of off state.

In Fig. 2, AL represents to be used to be produced as the piece of voltage VS of each function block power supply of voltage regulator again; Piece AL comprises and a diode DS and a resistance R S of a capacitor C S series connection that its charging voltage VS is stablized by a reference diode in parallel with capacitor C S.

Turn to the explanation of forming the separate functional blocks of voltage regulator according to Fig. 2 now, piece A comprises a controlled electronic switch T1, such as the SCR1 shown in Fig. 1, the winding W4 that AC load L is connected to generator through switch I T that it can be connected, so that a predetermined moment during part electrical angle of each positive half-wave of generator winding W4 output voltage V G is for AC load L power supply, up to there not being electric current to flow through its that time again.

Shown serial phase control type voltage regulator is characterised in that the half-wave by means of identical polar is AC electrical load L power supply, and only the part of each half-wave, i.e. the conducting phase place of control electronic switch T1 during electrical angle during the voltage effective value that the effective value of the generator voltage that offers AC electrical load L allows corresponding to load itself.

Therefore the voltage VL on the AC electrical load in electronic switch T1 downstream is detected by a piece B, provides square being directly proportional of a voltage V0 and input voltage VL at its output terminal, and is promptly definite by formula:

V0=KVL ²Here K is a predetermined constant value, and the voltage V0 that is integrated among the piece C is directly proportional with voltage VL on load L " effective value ", and it is made up of square root mean square of the alternating voltage VL value of being considered according to well-known formula.

The output V0 of piece B supplies to the input end of an inverting integrator that comprises a R1-C1 circuit and an operational amplifier A 1, and its noninvert end is connected on the voltage source V R1, the effective value of the permission voltage of its definite load that will be supplied to.

Therefore still raise greatly or reduce than reference voltage VR1 is little according to the mean value of voltage V0 from the output voltage V 1 of inverting integrator piece C.

The output V1 of the piece C that is made up of inverting integrator is sent to the input end of the piece D that comprises an inversion signal amplifier (A2, R2, R3), and anti-phase and its power gain is defined as with V1 according to the second reference voltage source VR2 for it:

R3/R2 R2 and R3 here is connected to an operational amplifier A 2, is the typical structure of an inverting amplifier.

Output terminal at A2 has second a control voltage V2 who is similar to V1, and is relevant with the effective value of the voltage VL that exists on the AC load L that limits as mentioned.Voltage V2 is therefore according to the variation of V0 with respect to reference voltage VR1, according to being reversed polarization as T1, promptly open circuit or during the switch releasing state by the voltage generator of winding W4 representative positive lost motion operation whether, perhaps when T1 be closed or during in conduction state electric current whether just flowing into load L, and change.

Voltage V2 is added to the non-inverting input of the comparator C P2 of piece F ', piece F ' has a reference voltage VR3 of the inverting input that acts on it, and it provides a threshold voltage that is suitable for determining wherein to be powered along with the triggering battery BA of switch T2 that moment.

The output signal of comparator C P2 by means of a diode D3, is sent to the control utmost point of the piece H that contains an electronic switch T2 subsequently, and as the SCR2 among Fig. 1, electronic switch T2 and battery BA in series are placed between the winding W4 of the latter and voltage generator.

According to Fig. 2 voltage regulator the piece N that comprises a voltage comparator CP1 is housed also, CP1 is relatively by the voltage ramp VC of piece E generation and the voltage V3 that is provided by piece I.Piece N is such, and when voltage VC had surpassed the voltage V3 of the piece I output directly relevant with the magnitude of voltage VB of battery BA, it connected it by means of the electronic switch T1 that diode D1 triggers piece A.

Because battery for nominal voltage 12V, battery charging voltage is fixed on about 14.5V usually, when electronic switch T2 is closed or is on state, same voltage also is present on the AC load L, although only limit to positive half-wave, it does not allow the voltage VL of AC load to surpass a desirable value, and such as 13V, it is usually less than the charging voltage of battery BA.

In order to be used to control the generation that T1 connects the voltage ramp VC of phase place, piece E is made up of the integrator RC-C2 of the positive half-wave that only is used for generator voltage VG, is blocked by diode DC to the negative half-wave that the electronic igniting circuit of motor is powered because be used to.

Piece E also comprises the first transistor TR1 that is used for capacitor C 2 short circuits; its base stage is usually by the voltage VS that powers to each function block of circuit; polarized via resistance R 4; and wherein the base stage of TR1 is connected to the collector electrode of the transistor seconds that suppresses the first transistor TR1 again; its base stage is polarized by means of resistance R G by the positive voltage of generator, and diode D2 is used for protecting TR2 during negative half-wave.

Therefore the integral value of representing generator voltage VG from the voltage VC of piece E, or more broadly constitute a voltage ramp relevant with generator voltage VG, and each generator voltage VG it is set to zero when becoming negative value; In this way, piece E always prepares at each positive half-wave or more broadly has on all half-waves of generator voltage of identical polar to work.

Piece L is again by being connected to resistance R 5, R6, the operational amplifier A 3 of R7 and R8 is formed, as a differential amplifier, it is with suitable gain, is amplified in poor about between the reference voltage VR4 of the nominal voltage of the voltage VB of the charged state of battery BA and expression battery BA.

More properly be represented as: $V3=\frac{R7+R8}{R5+R6}*\frac{R6}{R7}*\mathrm{VB}-\frac{R8}{R7}*\mathrm{VR}4$

Voltage V3 by piece 1 output is like this:

Zero, when VB less than a setting value of cell voltage when being 14.5V, this value is by the intermediate value of voltage regulator for the needed representative value of voltage of DC load output;

Equal the VC maximum value, with respect to the cell voltage of above being mentioned very little value added is arranged, for example during 0.2V for VB.

Figure according to Fig. 2 also comprises a piece ME who is used to control idle speed of engine, expression in detail in Fig. 4.

By this figure as can be seen, the piece ME of control idle speed of engine comprises two voltage comparator CP3 and CP4, and they are connected with the paraphase form and have by resistance R 22, R23 and R24 and R32, the hysteresis that R33 and R34 determine respectively is so that switch definitely inerrably is performed.

The inverting input of comparator C P3, via voltage divider R22, R21 receives the voltage VG of generator winding W4, so that a square signal VGS that can see in Fig. 8, presents at the output terminal of described comparator C P3 for each negative half-wave of voltage VG.Signal VGS is sent to the first input end I1 of a logic control element, and this logic control element is such as being a microcontroller, it can:

A) by measuring the time cycle between two plus or minus wavefront of voltage VGS, the running speed of detection of engine;

B) the voltage VG that sets up generator winding W2 on the basis of the logic level of VGS is just or negative, and

C) on basis, detect connection or the off state of AC load L by the logic level of the voltage VLS of comparator C P4 output; If its expression electric current of VLS=1 is just flowing through AC load L basically, promptly lamp is bright, and the VLS=0 indication lamp is disconnected, and does not promptly have electric current to flow through AC load L.

Therefore, again as shown in FIG. 4, when break-in switch I T shown in the position time, the voltage VL that appears on the negative electrode of T1 is sent to load L, and being switched to " lamp disconnection " position when the removable contact of IT, during with front opposite, it is sent to the anode of diode D30.

Voltage divider R30, R31 and capacitor C 30 are together, constitute a wave filter so that VDC appears at the inverting input of comparator C P4, do not have electric current flow through under the situation of AC load L-the lamp state of going out-output VLS will be in low logic level, or zero-level, and electric current flow through the bright state of AC load L-lamp-the voltage of the inverting input of CP4 be zero and therefore VLS will recover high logic level or level 1.

Fig. 3 has represented a scheme similar substantially with Fig. 2, and unique difference is the occasion that this series phase control type voltage regulator only is used for AC load L.

Also comprise piece A according to the voltage regulator of Fig. 3 according to Fig. 2, B, C, D and E, and power module AL, different is to be provided to the end of oppisite phase of the voltage comparator CP1 that constitutes a piece F part and the voltage VC that its non-oppisite phase end is connected to ramp generator E again now by the voltage V2 that piece D exports.The output voltage V S of comparator C P1 again via diode D1, directly is supplied to the control end of switch T1 in this case.

At the piece ME of the control idle speed of engine shown in Fig. 3, being configured with Fig. 2 same way as so that with stipulate previously the characteristic of this piece and it function and the operator scheme of entire circuit aspect all form reference.

Fig. 5,6 and 7 have provided being connected and another scheme of a kind of distinct methods of off state of detection AC electrical load L of imagination, and wherein the break-in switch I T according to previous examples is replaced by a simple switch.Therefore, in Fig. 5 and 6, same reference number has been used to indicate similar or suitable part.

According to Fig. 7 at the piece ME that is used for controlling idle speed of engine, the circuit of comparator C P3 does not become with the maintenance of comparing of prior figures 4, and logic control element MC has another one output terminal 01 now, can export several milliamperes, electric current as 5 to 10 milliamperes, by resistance R 25 and diode D20, switch I T and load L, or lead to voltage regulator.

Because common load has a very low resistance that is about 5-19 ohm, when electronic switch T1 is switched on load L or closure by voltage regulator, logic control element MC is suitably preset so that the signal VGS that provides on the input end I1 of comparator C P3 is provided, and the half-wave of measuring the running speed of motor and detecting generator voltage VG once more is positive or negative.In this case,, on AC load L, will there be voltage certainly, because intercepted electronic switch T1 is not connected certainly if voltage VG bears.Therefore logic control element MC can trigger the high logic level of output terminal 01 during this phase place, so that the electric current that is limited by resistance 25, flows through D20 and switch I T flows to load L, if described switch I T is closed so that be connected to load itself.

In this case, because the resistance value of load L and at the current value of the output terminal 01 of logic control element, suitable programming by means of described logic control element MC, input end I2 will identify certainly present diode D20 anode voltage low logic level and, this level will make the state of electrical load L of connection similar, and promptly lamp is bright.

In addition, if switch I T is disconnected, then have only the impedance of voltage regulator block B and C appear at D20 negative electrode and, because it is very high, it is about 100 kilo-ohms, the voltage that it will make microprocessor identify and occur on the anode of D20 is high logic level, and it will be disconnected similar to off state or the lamp of load L thus.

Diode 20 also has the logic control element of preventing, microcontroller MC for example, and the function of peak value appears in load L, because when the voltage that surpasses at the voltage on the load L at the anode of diode own, described diode D2 is polarized in opposite mode.

By way of example, the power supply voltage that lets as assume that circuit is VS=5, and R25=500 ohm, and it is that 0.7 volt of equivalent resistance that reaches the P1 negative electrode of opening a way at P is 100 kilo-ohms that L=5 ohm, the direct voltage on diode D20 fall.

Under these conditions, if switch I T connects load L, when the output terminal 01 of logic control element is triggered, 5 volts of voltages will be appeared at this output terminal so, and 0.74 volt will appear at input end I2, and be identified as a low logic level by microprocessor; On the other hand, if switch I T is opened, then 4.98 volts voltage will appear at the anode of D20 and will be identified as a high logic level by logic control element MC.

In this, this device uses a kind of can the foundation in two kinds of methods above being narrated, no matter AC load L connects or disconnection, promptly spot is not bright or goes out, and the running speed of definite motor.

The positive racing speed running of let us hypothesis internal-combustion engine.Under these conditions, its running speed must remain in the strict limit, for the puffer of a volume 50cc, typically remains between per minute 1700 commentaries on classics and 1900 commentaries on classics.

Therefore, the electrical load L that clearly is made up of automotive lamp influences these racing speed values; Therefore, when load does not connect, be necessary by in the velocity range of strict difinition, connecting and motor winding W4 another load assurance motor side by side keeps its minimum speed in the preestablished limit scope, so that preventing the loss of energy when not required.

Let us supposes that the racing speed of motor in the former example are fixed on 1800rpm, and it is bright to be accompanied by lamp, promptly is attended by the AC load of connection, and supposes that piece ME detects this state in this case, keeps static.

When lamp is disconnected, i.e. when AC load did not connect, described 1800rpm speed also must be held; The piece ME that controls idle speed of engine in this case use a kind of in two kinds of methods mentioned above detect load be disconnect or lamp be the state that disconnects, measure motor rotating speed and, if described speed has surpassed this minimum value of above-mentioned 1800rpm, promptly surpassed the default speed limit of that motor, then electronic switch SCR3 is started so that connect.The winding W4 of generator is shorted to ground and is attended by very big electric current and flows through at generator itself in this way, and it will consume very big energy, passes through at least and the about 50-60 watt common same energy of electrical load L, with the braking internal-combustion engine.

Then SCR3 starting, engine speed is reduced to the minimum speed in the allowed band, and logic control element will block the latter with its output terminal 02 of the control utmost point that is connected to SCR3 subsequently, disconnect the generator short circuit so that allow internal-combustion engine gather way again.

Realize control in this way to idle speed of engine.

If more fuel is supplied to internal-combustion engine now, even will increasing SCR3, its running speed keeps connecting, because the energy of internal-combustion engine is certainly than big with the energy of the voltage half-wave consumption of short circuit by generator W4.

Then in this case, if the running speed of internal-combustion engine has surpassed the minimum speed of a certain preprogrammed range, such as the 400rpm situation of mentioning in front, so for logic control element MC clearly the driver of vehicle want to gather way so that surpass this speed, it will make SCR3 be blocked, and avoid the unnecessary waste of energy thus.

Represented by what described with accompanying drawing, summarize and to get up very clearly to understand the racing speed that a kind of method and a kind of device have been used to controlling combustion engine, can detect the running speed of internal-combustion engine, disconnect no matter AC load is connected still, and on the basis of these two information generators, can start the electric switch of a coupling the generator to the groun.

Especially thus She Xiang device only by making voltage generator be shorted to ground by means of a unidirectional electronic switch, can be finished the braking of internal-combustion engine and not utilize additional electrical load.

The startup that is used to brake the unidirectional electronic switch of internal-combustion engine in addition occurs over just under the situation that load is disconnected and the minimum running speed that is accompanied by motor remains in the preset speed values scope.

At last, according to the present invention, load is that the connection or the detection of off state can be finished by means of the break-in switch of the input end that electrical load is connected to a function block controlling idle speed of engine, described information is provided to a logic control element, it is suitably programmed the operation with the whole device of management control idle speed of engine.Another kind method; load L is connected or disconnects; or the lamp status detection that is switched on or disconnects; can be by the voltage drop in the protection diode D20 downstream of sense switch IT and logic control element and finish; voltage drop is produced by a minimizing electric current; this electric current is when the electronic switch T1 of voltage regulator is blocked, and promptly during the negative half-wave by the voltage of generator output, ME provided by described of control idle speed of engine.

Yet clearly, that narrated and fully being provided that accompanying drawing has been represented by the mode of giving an example according to some most preferred embodiment of apparatus and method of the present invention, but still understand aspect the type of used voltage regulator with at the described circuit that is used for detection of engine speed and be used to control the state aspect of living in of the AC load of engine speed, improvement and modification all are possible, and therefore do not break away from the scope of claim.

Claims (12)

1. method that is used for the idling of IC engine rotating speed of controller motor-car, its electronics comprises an electrical load (L-BA) that can be connected to a voltage generator winding (W4) by means of manual operation switch device (IT) under the control of a voltage regulator (A-N), it is characterized in that the following step:

The running speed of the motor relevant with the frequency of the voltage (VG) that provides by described voltage generator winding (W4) is provided;

Detect about the connection of electrical load (L) or the signal of off state by a logic control element (ME); And

According to the running speed of motor and being connected and the information of off state about the electrical load (L-BA) that detects by described logic control element (ME), make described voltage generator winding (W4) ground connection selectively or be connected to the electronics of vehicle, to keep the idle running working state of motor.

2. according to the method for claim 1, it is characterized in that such step: in the off state of electrical load (L), sustaining voltage generator winding (W4) ground connection so that make engine braking, and keeps the racing speed state in the prespecified range of described engine running speed.

3. according to the method for claim 1, it is characterized in that such step: by detect with load (L) be connected to voltage generator winding (W4) switch gear (IT) open or close state, detect the connection and the off state of electrical load (L).

4. according to the method for claim 1 or 3, it is characterized in that such step:, detect the connection or the off state of electrical load (L) by detecting the working state that voltage generator winding (W4) is connected to the manual break-in switch (IT) of described electrical load (L) or described logic control element (ME).

5. according to the method for claim 1 or 3, wherein said voltage generator can be connected to electrical load (L) by means of the electronic switch (T1) by described voltage regulator (A-N) control, it is characterized in that such step: flow to described switch gear (IT) and when described electronic control switch (T1) is blocked, flow to the voltage drop that electric current produced of AC load (L), the connection or the off state of detection electrical load (L) from described logic element (ME) by detecting by one.

6. device that is used to control the racing speed of internal combustion engine of motor vehicle, its circuit comprises an AC load (L) and a voltage regulator (A-N) that can be connected to a voltage generator (W4) by a manually operated switch gear (IT), be characterised in that it comprises a logic control element (ME) that is used to control idle speed of engine, it operationally is connected to voltage regulator and described switch gear (IT), and by default running speed with the detection motor relevant with the frequency of generator voltage, or the connection and the off state of detection electrical load (L), described control unit (ME), according to the running speed of motor and the connection or the off state of electrical load, started an electronic switch (SCR3) during the further default off state with generator (W4) ground connection with the AC load (L) that is enabled in described circuit.

7. according to the device of claim 6, it is characterized in that voltage generator (W4) can be connected to ground by a unidirectional electronic switch (SCR3).

8. according to the device of claim 6, wherein said voltage generator (W4) is connected to electrical load (L) by an electronic switch (T1) of being controlled by a voltage regulator (A-N), it is characterized in that described manual operation switch device comprises, between described electronic switch (T1) and electrical load (L), optionally connect and disconnect a break-in switch (IT) of the logic control element (ME) that is used to control idle speed of engine respectively, and wherein said logic control element (ME) is preset, with according to the condition that sets by described break-in switch (IT), detect connection and the off state of electrical load (L) to electronic switch (T1).

9. device according to Claim 8, it is characterized in that described logic control element (ME) comprises a microcontroller (MC), it has via first voltage comparator (CP3), the winding (W4) that is connected to voltage generator is to receive one first input (I1) about the running speed information of motor, and via a RC wave filter and one second voltage comparator (CP4), be connected to described electronic switch (T1), receiving about the connection of electrical load (L) and one second input (I3) of off state information via the break-in switch (IT) above mentioned, and wherein one the 3rd output (02) of microcontroller (M2) is connected to the control utmost point with the described electronic switch (SCR3) of generator (W4) ground connection.

10. according to the device of claim 6, wherein said voltage generator (W4) is connected to electrical load (L) by the electronic switch (T1) by voltage regulator (A-N) control, it is characterized in that described manual operation switch device (IT) only presets electrical load (L) for connecting and disconnect according to voltage generator (A-N), and the logic control element (ME) that wherein is used to control idle speed of engine preset with detection under the control of described logic control element (ME) with by flowing to being connected or off state of manual operation switch device (IT) electrical load (L) relevant with the voltage drop that electric current produced of an AC load (L).

11. device according to claim 10, be characterised in that described logic control element (ME) comprises a microcontroller (MC), it has via a voltage comparator (CP3) and is connected to generator (W4) to receive one first input (I1) about the information of engine running speed; Under a cut-off state of the electronic switch of being controlled by voltage regulator (A-N) (T1); receive by a resistance (R25) voltage drop provided about one second inlet (I2) of the signal of the connection of described electrical load (L) and off state, described resistance is connected between described second output (I2) of microcontroller (MC) and manual operation switch device (IT) and is connected to an anode of protecting diode (D20) of electrical load.

12. any described device in 11 is characterized in that described voltage regulator is a series of phase control type voltage regulators according to Claim 8.

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