CN104114851A

CN104114851A - Engine startup device

Info

Publication number: CN104114851A
Application number: CN201380009867.7A
Authority: CN
Inventors: 谷贝将通
Original assignee: Hitachi Automotive Systems Ltd
Current assignee: Hitachi Astemo Ltd
Priority date: 2012-03-30
Filing date: 2013-02-12
Publication date: 2014-10-22
Also published as: JP2013209900A; WO2013145897A1

Abstract

The objective of the present invention is to implement an engine startup device with which a temporary interruption of electrical devices upon engine startup can be suppressed without requiring a battery status detection circuit to be provided in the vehicle. When the engine startup operation begins, a start switch (108) is closed, and current flows from a battery (110) to the engine startup device. At this time, a short-circuit switch (104) is open, so current flows to a starter motor (100) through a starting resistor (102). When the voltage between the starting resistor (102) and the starter motor (100) meets a predetermined criterion, a voltage determination device (106) places the short-circuit switch (104) in the short-circuited state. At this time the starter motor (100) is rotating and is generating back electromotive force, so the current flowing to the starter motor (100) is suppressed and the voltage drop in the battery (110) is sufficiently small, so a temporary interruption of the operation of the electrical devices installed in the vehicle does not occur. When a vehicle control device determines that the engine has started, the start switch (108) is opened and the supply of electricity to the engine startup device is stopped.

Description

Engine starting gear

Technical field

The present invention relates to engine starting gear.

Background technique

In the prior art, for example carry in petrolic vehicle at mobile engine, be provided with actuating motor more than the crankshaft rotation regulation rotating speed for making motor when the ato unit as the starting drive of motor.

By actuating motor just made motor start start after, actuating motor without spin, therefore can not produce counter electromotive force, so there is the large current flowing that is called as inrush current (inrush current) in actuating motor.Due to the generation of this inrush current, the output voltage of battery can decline, and instantaneous interruption can occur the electrical equipment such as sound equipment or navigation system that is equipped on vehicle.

Particularly, being subject in recent years the raising of the consciousness to environmental problem and vehicle exhaust restriction extensively in vehicle that adopt, that carried engine automatic stop/startup system (so-called idling system: idle stop), while again startup after each engine stop, there is the situation of the instantaneous interruption that produces electrical equipment.

Therefore, patent documentation 1 discloses the engine start control device of the pressure drop of the battery producing while suppressing ato unit.

The disclosed engine start control device of patent documentation 1 possesses battery and inrush current restraining device, and inrush current restraining device possesses: detect the battery status detection unit of the battery status of battery, the operation control part that suppresses the inrush current suppressing portion of inrush current, actuating motor is carried out to electric power supply or the relay stopping of electric power supply and the action of control inrush current suppressing portion and relay.

And operation control part is controlled the action of inrush current suppressing portion based on battery status, thereby suppress inrush current, the pressure drop of the battery having produced while having suppressed thus ato unit.

Formerly technical paper

Patent documentation

Patent documentation 1:JP JP 2009-68426 communique

Summary of the invention

The problem that invention will solve

In the disclosed method of patent documentation 1, the battery status that " control device " detects based on " battery status detection unit " carries out the action of " using suppress to switch between the two ends of resistance of unit the short circuit open-circuit condition switching unit of any state in short-circuit condition and open-circuit condition as inrush current ".

Therefore, actuating motor need to be near battery the testing circuit of setting battery state separately, signaling line that need to be from the testing circuit of battery status (from vehicle side) to actuating motor etc.Now, not only need above-mentioned signaling line, also need wiring operation.

Therefore, the object of the invention is to, need to, at the testing circuit of the battery status of vehicle side configuration, just can not realize the instantaneous interruption that can suppress electrical equipment in the time of ato unit and the engine starting gear that can also guarantee engine startability.

For the means of dealing with problems

In order to address the above problem, of the present invention being constructed as follows.

The application comprises multiple means that address the above problem, and enumerates a wherein example, and a kind of engine starting gear of vehicle, possesses: accept electric power supply and the actuating motor for ato unit from being equipped on the electric accumulator of vehicle; In series be electrically connected and suppress to flow into from electric accumulator the current suppressor of the electric current actuating motor with actuating motor; And at least according to the both end voltage of actuating motor, the two ends of current suppressor are switched to the short circuit open-circuit condition switch of any state in short-circuit condition and open-circuit condition.

Invention effect

According to the present invention, do not need the testing circuit of the battery status that is disposed at vehicle side, just can realize the instantaneous interruption that can suppress electrical equipment in the time of ato unit and the engine starting gear that can also guarantee engine startability.

Problem, formation and effect beyond above-mentioned can become clear and definite by the explanation of following mode of execution.

Brief description of the drawings

Fig. 1 is the schematic configuration diagram of embodiments of the invention 1.

Fig. 2 is the flow chart that represents embodiment 1 action.

Fig. 3 is the schematic configuration diagram of embodiments of the invention 2.

Fig. 4 is the schematic configuration diagram of embodiments of the invention 3.

Fig. 5 is the schematic configuration diagram of embodiments of the invention 4.

Fig. 6 is the schematic configuration diagram of embodiments of the invention 5.

Fig. 7 is the explanatory drawing about the structural relation between starter and the motor of vehicle.

Embodiment

Before explanation embodiments of the invention, with reference to Fig. 7, the structural relation between starter and the motor of vehicle is described.

In Fig. 7, on the crankshaft 6 of the motor 1 of vehicle, ring gear 7 is installed.On the other hand, producing inner support armature (not shown) for the starter 2 of the rotary driving force of ato unit 1 rotating, in one end of armature, small gear 5 is installed.This small gear 5 engages with ring gear 7, thereby can transmit to motor 1 rotary driving force of starter 2.

Engine starting gear of the present invention is not that the state that detects the battery that is disposed at vehicle side suppresses inrush current, but the voltage status of detection actuating motor is carried out the inhibition of inrush current.

Below, with reference to accompanying drawing, embodiments of the invention are described.

Embodiment 1

Embodiments of the invention 1 are the examples that the voltage based between current suppressor and actuating motor makes the engine starting gear of the short circuit open-circuit condition switch action being connected in parallel with current suppressor.

Fig. 1 is the overall schematic configuration diagram of the engine starting gear of embodiments of the invention 1.

As shown in Figure 1, embodiment 1 engine starting gear possesses: the actuating motor 100 that one end is grounded; The starting resistance (current suppressor) 102 that one end is connected with the other end of actuating motor 100; The short switch (short circuit open-circuit condition switch) 104 being connected in parallel with starting resistance 102; And the voltage (current potential) of point based between starting resistance 102 and actuating motor 100 operates the short circuit of short switch 104 and the voltage determinant 106 of open circuit.

Form engine starting gear by actuating motor 100, starting resistance 102, short switch 104 and voltage determinant 106.

The other end of starting resistance 102 is via enable switch 108, battery (electric accumulator) 110 and ground connection.And, supply with electric power from battery 110 to actuating motor 100 by closed enable switch 108.

Actuating motor 100 is for example by magnetic displacement formula or reducing gear is wheeled etc. that known direct current motor forms.

Starting resistance 102 is the current suppressors that suppress to flow into from battery 110 inrush current of actuating motor 100 in the time that actuating motor 100 starts.For example, be desirably in the scope of charge volume, internal resistance, serviceability temperature of the battery 110 of hypothesis, use and there is the starting resistance that becomes the action that exceedes other electrical equipments that are equipped on vehicle and ensure the resistance value of the cell voltage of voltage.

In addition, short switch 104 is between the two ends of starting resistance 102, to switch to the short circuit open-circuit condition switch of any state in short-circuit condition and open-circuit condition.If short switch 104 becomes short-circuit condition, as the starting resistance 102 of current suppressor in by the state of short circuit.

Then, voltage and the predefined determinating reference of voltage determinant 106 to the point between starting resistance 102 and actuating motor 100 compares, and provides command signal to short switch 104, and short switch 104 is moved.

In addition, for the ease of diagram, the ignition key that when initial startup that enable switch 108 has simplified that vehicle operating starts, driver is pressed into and make engine automatic stop based on idle stop after the parallel circuit of the switch that ato unit time-control apparatus (ECU) is controlled again, only represent with an enable switch 108.

Battery 110 is for example made up of the secondary cell as lead storage battery, is device from electric power to engine starting gear that supply with.

Then, action is described.Fig. 2 is the flow chart that represents the action of embodiment 1 engine starting gear.

As shown in Figure 2, if start engine start, first closed enable switch 108, electric current is from battery 110 flow direction engine starting drives (step S101).Now, can not produce counter electromotive force, therefore short switch 104 is in open-circuit condition, and electric current flows to actuating motor 100 after by starting resistance 102.Thus, suppress the generation of inrush current, the pressure drop of battery 110 is enough little, and its size is not enough to produce the action instantaneous interruption of the electrical equipment that is equipped on vehicle.

Then, voltage determinant 106 is obtained the voltage (step S102) of point that produce by powering from battery 110, between starting resistance 102 and actuating motor 100.At this, voltage determinant 106 judges whether the voltage of the point between starting resistance 102 and actuating motor 100 meets predefined determinating reference (step S103).In the situation that being judged to be not meet benchmark, return to step S102.

In step S103, meet predefined determinating reference in the case of being judged to be the voltage of the point between starting resistance 102 and actuating motor 100, voltage decision maker 106 operates short switch 104, is made as short-circuit condition (step S104).

If short switch 104 becomes short-circuit condition, starting resistance 102 is made electric current suppress to stop by short circuit, but now actuating motor 100 produces counter electromotive force under rotation status, therefore the electric current that flows through actuating motor 100 is suppressed, the pressure drop of battery 110 is enough little, and its size is not enough to produce the action instantaneous interruption of the electrical equipment that is equipped on vehicle.

Then, the control gear of vehicle (ECU) judges whether engine start sets up (step S105).In step S105, being judged to be engine start also in invalid situation, return to step S105.In the situation that being judged to be engine start establishment, disconnect enable switch 108, the energising of engine starting gear is stopped to (step S106), engine start finishes.

At this, expect the determinating reference in step S103 to set for: in step S101, just just short circuit of short switch 104, afterwards not producing in the scope of instantaneous interruption of electrical equipment, makes to start to short switch 104 short as much as possible by the time till short circuit from closed enable switch 108 after closed enable switch 108 and in step S104.

As previously discussed, according to embodiments of the invention 1, be connected in series starting resistance with actuating motor 100 and judge the voltage of actuating motor 100 and determine whether the voltage determinant 106 of starting resistance short circuit owing to possessing in engine starting gear, with switch the short circuit of starting resistance 102 and the short switch of open circuit 104 by voltage determinant 106, therefore need to be near battery 110 the battery status detection unit of the state of configuration detection battery 110, do not need the signaling line between this battery status detection unit and battery, and the signaling line of connection battery status detection unit or ECU and the current suppressor to actuating motor etc.

In addition, the also wiring operation of undesired signal line, during therefore can also shortening the manufacture of vehicle.

Embodiment 2

Then, embodiments of the invention 2 are described.

Embodiments of the invention 2 are examples of following engine starting gear, that is: suppress the current potential of the point between resistance 102 and actuating motor 100 and poor (hereinafter referred to as actuating motor voltage) with the current potential of the earth point (GND) of actuating motor 100 based on electric current, the short circuit open switch 200 being connected in parallel with electric current inhibition resistance 102 is moved.Fig. 3 is the schematic configuration diagram of the engine starting gear in embodiments of the invention 2.

As shown in Figure 3, embodiment 2 engine starting gear possesses: the actuating motor 100 that one end is grounded; The starting resistance 102 that one end is connected with the other end of actuating motor 100; The solenoid switch 200 being connected in parallel with starting resistance 102; The fly-wheel diode (solenoid switch is used) 202 that negative electrode is connected with the positive side terminal of solenoid switch 200 and anode is connected with the minus side terminal of solenoid switch 200; The bleeder circuit 204 being connected in parallel with actuating motor 100; With N-shaped MOSFET206.

Bleeder circuit 204 is made up of 2 resistive elements that are connected in series mutually, and the tie point each other of these two resistance is connected with the grid of N-shaped MOSFET206.In addition, the source ground of N-shaped MOSFET206, drain electrode is connected with the minus side terminal of solenoid switch 200 with the anodic bonding of fly-wheel diode 202 time.

In addition when, the other end of starting resistance 102 is connected with the positive side terminal of solenoid switch 200 and the negative electrode of fly-wheel diode 202, be connected with enable switch 108.

Form voltage determinant by solenoid switch 200, bleeder circuit 204, N-shaped MOSFET206 and fly-wheel diode 202.

In the above-described configuration, supply with electric power from battery 110 to actuating motor 100 by enable switch 108.

Actuating motor voltage is by bleeder circuit 204 dividing potential drops, and the voltage after dividing potential drop is applied to the grid of N-shaped MOSFET206.

Solenoid switch 200 is between the two ends of starting resistance 102, to switch to the short circuit open circuit switch of any state in short-circuit condition and open-circuit condition.In addition, solenoid switch 200 is one of open type mechanical relay, possesses the switch part that is connected with the two ends of starting resistance 102 and disconnects or the coil portion of Closing Switch portion by electromagnetic force.This switch part becomes closed state from off state in the time coil portion having been applied to the voltage of regulation.

The inrush current that fly-wheel diode (solenoid switch is used) 202 produces while making to have cut off the energising of the coil portion to solenoid switch 200 refluxes.

If beginning engine start, first closed enable switch 108, electric current is from battery 110 flow direction engine starting drives.Now, the switch part of solenoid switch 200 is in open-circuit condition, and electric current flows to actuating motor 100 by starting resistance 102.Therefore, inrush current is suppressed, and the pressure drop of battery 110 is enough little, is not enough to produce the action instantaneous interruption of the electrical equipment that is equipped on vehicle.

After actuating motor 100 starts, if thereby because the rising actuating motor voltage of counter electromotive force rises, be applied to voltage between the gate-to-source of N-shaped MOSFET206 and also rise.In the near future, if be applied to the threshold voltage of the grid that voltage between the gate-to-source of N-shaped MOSFET206 exceedes N-shaped MOSFET206, N-shaped MOSFET206 becomes on state.If N-shaped MOSFET206 becomes on state, the coil portion of solenoid switch 200 is applied in the voltage of battery 110, and the switch part of solenoid switch 200 becomes closed state.

,, in embodiment 2, actuating motor voltage exceedes voltage between the gate-to-source that can apply the threshold voltage of the grid that is greater than N-shaped MOSFET206 voltage via bleeder circuit 204 becomes the determinating reference that the switch part of solenoid switch 200 is moved.In addition, this determinating reference can recently be set by the dividing potential drop that changes bleeder circuit 204.

If solenoid switch 200 becomes closed state, starting resistance 102, by short circuit, stops the electric current of actuating motor 100 to suppress.Now, motor 100 produces counter electromotive force under rotation status, and the electric current that therefore flows through actuating motor 100 is suppressed, and the pressure drop of battery 110 is enough little, is not enough to produce the action instantaneous interruption of the electrical equipment that is equipped on vehicle.

Once after the switch part of solenoid switch 200 becomes closed state, the output voltage of battery 110 becomes actuating motor voltage, therefore until disconnect enable switch 108, solenoid switch 200 maintains closed state.

The action of embodiment 2 action engine starting drive can represent with the action flow chart of the embodiment 1 shown in Fig. 2.But in step S104, the switch part of solenoid switch 200 becomes short-circuit condition.

Embodiments of the invention 2 also can obtain the effect identical with embodiment 1.

In addition, in embodiments of the invention 2, use open type solenoid switch as short circuit open circuit switch, but be not limited to this, also can use electromagnetic relay etc.In addition, switch on and cut-out energising in the time meeting decision condition as long as the energising of the coil portion to solenoid switch is not arranged in while meeting decision condition, just can use normal close type solenoid switch or electromagnetic relay etc.

In addition, in embodiments of the invention 2, used N-shaped MOSFET as the switch that drives solenoid switch 200, but also can use bipolar transistor or IGBT etc.

In addition, embodiment 2 is provided with the bleeder circuit 204 that actuating motor voltage is carried out to dividing potential drop, but according to the threshold voltage of the grid of the voltage change of actuating motor 100 and N-shaped MOSFET206 and make the relation in the moment of starting resistance 102 short circuits, bleeder circuit 204 also can be set.

In addition, owing to having reduced the time that uses N-shaped MOSFET206 under transition state, therefore can, between the tie point of starting resistance 102 and actuating motor 100 and bleeder circuit 204 or between bleeder circuit 204 and the grid of N-shaped MOSFET206, append comparator.

In addition, in embodiment 2, be the example of low side switch (lowside switch) exemplified with driving the switch of solenoid switch 200, but also can change circuit structure and be made as high side switch (highside switch).

In addition, in embodiment 2, illustrated that voltage based on actuating motor 100 makes the example of the engine starting gear of the switch part action of the solenoid switch 200 being connected in parallel with starting resistance 102, but poor (hereinafter referred to as the starting resistance voltage) of the voltage of the point between voltage and starting resistance 102 and the battery 110 of point that also can be based between starting resistance 102 and actuating motor 100 moves solenoid switch 200.Now, the rising because of counter electromotive force after the startup of actuating motor 100 of the both end voltage of starting resistance 102 declines, therefore using the both end voltage of starting resistance 102 lower than the situation of predefined reference potential as the condition that solenoid switch 200 is moved.

Embodiment 3

Then, embodiments of the invention 3 are described.

Embodiments of the invention 3 are as suppressing the short circuit open switch that is connected in parallel of resistance 102 and used the example of the engine starting gear of semiconductor switch with electric current.Fig. 4 is the schematic configuration diagram of the engine starting gear of embodiments of the invention 3.

As shown in Figure 4, embodiment 3 engine starting gear possesses: the actuating motor 100 that one end is grounded; The starting resistance 102 that one end is connected with the other end of actuating motor 100; The p-type MOSFET300 being connected in parallel with starting resistance 102; The fly-wheel diode that positive side terminal is connected and anode is grounded of negative electrode and actuating motor 100 (actuating motor with) 304; The bleeder circuit 204 being connected in parallel with actuating motor 100; With N-shaped MOSFET206.

Bleeder circuit 204 is made up of 2 resistive elements that are connected in series mutually, and these two resistance tie point is each other connected with the grid of N-shaped MOSFET206.In addition, the source electrode of N-shaped MOSFET206 is grounded, and drain electrode is connected with one end of the bleeder circuit being made up of 2 resistive elements that are connected in series mutually (p-type MOSFET uses) 302.

In addition, the tie point each other of two of bleeder circuit 302 resistance is connected with the grid of p-type MOSFET300.The drain electrode of p shape MOSFET300 is connected with one end of starting resistance 102 (with the tie point of actuating motor 100), and the source electrode of p shape MOSFET300 is connected with the other end of starting resistance 102.And the source electrode of the p shape MOSFET300 being connected with the other end of starting resistance 102 is connected with enable switch 108 when connection with the other end of bleeder circuit (p-type MOSFET uses) 302.

Form voltage determinant by fly-wheel diode 304, bleeder circuit 204, N-shaped MOSFET206, bleeder circuit 302 and p-type MOSFET300.

The inrush current that fly-wheel diode 304 produces while making to have cut off to the energising of actuating motor 100 refluxes.

Bleeder circuit 302 in order to be made as p-type MOSFET300 on state and to arrange in the time that N-shaped MOSFET206 becomes on state.During in cut-off state, in bleeder circuit 302, do not have electric current to flow through at N-shaped MOSFET206, therefore the grid of p-type MOSFET300 is identical with the voltage of source electrode, and p-type MOSFET300 is in cut-off state.

N-shaped MOSFET206, in the time of on state, has electric current to flow through in bleeder circuit 302, between the grid of p-type MOSFET300 and source electrode, produces voltage difference.As long as be the intrinsic standoff ratio that mode below the threshold voltage of the grid of p-type MOSFET300 is set bleeder circuit 302 according to making this voltage difference, just can, in the time that N-shaped MOSFET206 becomes on state, p-type MOSFET300 be made as on state.

P-type MOSFET300 will switch to the short circuit open circuit diverter switch of any state in short-circuit condition and open-circuit condition between the two ends of starting resistance 102.P-type MOSFET300 becoming on state in the time that bleeder circuit 302 has applied assigned voltage to grid, and starting resistance 102 is by short circuit.

If beginning engine start, first closed enable switch 108, electric current is from battery 110 flow direction engine starting drives.Now, p-type MOSFET300 is in cut-off state, and electric current flows to actuating motor 100 by starting resistance 102, and therefore inrush current is suppressed, and the pressure drop of battery 110 is enough little, is not enough to produce the action instantaneous interruption of the electrical equipment that is equipped on vehicle.

After actuating motor 100 starts, if thereby because the voltage of the rising actuating motor 100 of counter electromotive force rises, be applied to voltage between the gate-to-source of N-shaped MOSFET206 and also rise.In the near future, if be applied to the threshold voltage of the grid that voltage between the gate-to-source of N-shaped MOSFET206 exceedes N-shaped MOSFET206, N-shaped MOSFET206 becomes on state.If N-shaped MOSFET206 becomes on state, make p-type MOSFET300 become on state via bleeder circuit 302.

,, in embodiment 3, the voltage of actuating motor 100 exceedes voltage between the gate-to-source that can apply the threshold voltage of the grid that is greater than N-shaped MOSFET206 voltage via bleeder circuit 204 becomes the determinating reference that makes p-type MOSFET300 become on state.This determinating reference also can recently be set by the dividing potential drop that changes bleeder circuit 204.

If p-type MOSFET300 becomes on state, starting resistance 102, by short circuit, stops the electric current of actuating motor 100 to suppress.Now, actuating motor 100 produces counter electromotive force under rotation status, and therefore inrush current is enough little, is not enough to produce the action instantaneous interruption of the electrical equipment that is equipped on vehicle.

Once p-type MOSFET300 becomes after on state, the output voltage of battery 110 becomes the voltage of actuating motor 100, therefore until disconnect enable switch 108, p-type MOSFET300 maintains on state.

The action of the action engine starting drive in embodiment 3 can be as shown in Figure 2 embodiment 1 action flow chart represent.But in step S104, p-type MOSFET300 becomes on state.

Embodiments of the invention 3 also can obtain the effect identical with embodiment 1,2.

In addition, in embodiment 3, use N-shaped MOSFET206 and p-type MOSFET300, but also can replace these and use bipolar transistor or IGBT etc.

In addition, in embodiment 3, be provided with the bleeder circuit 204 that the voltage of actuating motor 100 is carried out to dividing potential drop, but according to the threshold voltage of the grid of the variation of the voltage of actuating motor 100 and N-shaped MOSFET206 and make the relation in the moment of starting resistance 102 short circuits, bleeder circuit 204 also can be set.

In addition, owing to having reduced the time that uses N-shaped MOSFET206 under transition state, therefore can, between the point of starting resistance 102 and actuating motor 100 and bleeder circuit 204 or between bleeder circuit 204 and the grid of N-shaped MOSFET206, append comparator.

In addition, in embodiment 3, illustrate that the voltage based on actuating motor 100 makes the example of the engine starting gear of the p-type MOSFET300 turn-on action being connected in parallel with starting resistance 102, but also can make p-type MOSFET300 turn-on action by the voltage based on starting resistance 102.Now, the voltage of starting resistance 102 because the rising of counter electromotive force declines, is therefore made as starting resistance voltage the condition that makes p-type MOSFET300 turn-on action after actuating motor 100 starts lower than the situation of predefined reference potential.

In addition, p-type MOSFET300 can be a MOSFET that can tolerate the electric current of hundreds of amperes, also can use 2 MOSFET that are connected in parallel to each other, and consists of the structure of the electric current that can tolerate hundreds of amperes these two MOSFET.

Embodiment 4

Then, embodiments of the invention 4 are described.

Embodiments of the invention 4 are to use semiconductor switch as short circuit open switch, suppress the voltage of the point between resistance 102 and actuating motor 100 based on electric current, drive the example of the engine starting gear of semiconductor switch 400 according to the pwm signal of exporting from pwm signal follower 404.Fig. 5 is the schematic configuration diagram of the engine starting gear of embodiments of the invention 4.

As shown in Figure 5, embodiment 4 engine starting gear possesses: the actuating motor 100 that one end is grounded; The starting resistance 102 that one end is connected with the other end of actuating motor 100; The semiconductor switch 400 being connected in parallel with starting resistance 102; The fly-wheel diode that positive side terminal is connected and anode is grounded of negative electrode and actuating motor 100 (actuating motor with) 304; The electrical current determination device (voltage determinant) 402 being connected with the positive side terminal of actuating motor 100; With the pwm signal follower 404 being connected with this electrical current determination device 402; Supply with electric power by enable switch 108 from battery 110.

Pwm signal follower 404 is connected with the grid of semiconductor switch 400, supplies with pwm signal to the grid of this semiconductor switch 400.

Form engine starting gear by actuating motor 100, starting resistance 102, semiconductor switch 400, fly-wheel diode 304, electrical current determination device 402 and pwm signal follower 404.

Current potential between actuating motor 100 and starting resistance 102 is imported into electrical current determination device 402.In electrical current determination device 402, the current potential between actuating motor 100 and starting resistance 102 based on inputted, the size of the electric current that decision is switched on to actuating motor 100.

The value of the electrical current determining in electrical current determination device 402 is imported into pwm signal follower 404.In pwm signal follower 404, input the pwm signal of the value of the electrical current based on inputted to semiconductor switch 400, carry out short circuit and the open circuit of starting resistance 102, control the control of carrying out the electrical current size to actuating motor 100 by PWM.

In embodiments of the invention 4, can obtain the effect identical with embodiment 1.In this embodiment 4, can be with small amplitude control the specific conductance to starting resistance 102 (conduction ratio), the size of the energising amount to actuating motor 100 of control, so can reduce the effect amplitude of the voltage of battery 110 compared with embodiment 1～3 example.

In addition, embodiment 4 semiconductor switch 400 has used the mark of p-type MOSFET in the example shown in Fig. 5, but also can use bipolar transistor or IGBT etc.In addition, also can in pwm signal follower 404, the increasing apparatus such as charge pump circuit be set, and N-shaped MOSFET is used as to semiconductor switch 400.

Embodiment 5

Then, embodiments of the invention 5 are described.

Embodiments of the invention 5 are examples of following engine starting gear: when startup again (hereinafter referred to as again starting) after engine automatic stop, the situation (hereinafter referred to as initial start-up) when again starting after stopping travelling because of signal etc. in Vehicle Driving Cycle, is not used electric current inhibition resistance.Fig. 6 is the schematic configuration diagram of the engine starting gear of embodiments of the invention 5.

As shown in Figure 6, embodiment 5 engine starting gear possesses: the actuating motor 100 that one end is grounded; The starting resistance 102 that one end is connected with the other end of actuating motor 100; The short switch 104 being connected in parallel with starting resistance 102; When initial start-up, accept the signal of exporting from the ECU of vehicle and judge the short circuit of short switch or the initial start-up decision maker 502 of open circuit; The voltage of the point based between starting resistance 102 and actuating motor 100 is judged the short circuit of short switch 104 or the voltage decision maker 504 of open circuit; Operate the short circuit of short switch 104 or the short switch operation equipment 506 of open circuit with the result of determination based on initial start-up decision maker 502 and voltage decision maker 504; Supply with electric power by closed enable switch 108 from battery 110.

After starting engine start, initial start-up decision maker 502 judges that asked engine start is initial start-up or again starts.

Engine start is that initial start-up or the judgement again starting can and judge whether motor environment temperature exceedes fixed temperature and carry out by measurement motor environment temperature.

Or engine start is that initial start-up also can be based on judging that from the signal of ECU asked engine start is initial start-up or again starts or again start.This is because ECU exports the signal that determines whether again to start after idle stop, can utilize this signal.

In the situation that being judged to be to be initial start-up, initial start-up decision maker 502 is exported the signal that short switch 104 is made as to short-circuit condition to short switch operation equipment 506.Be again start in the situation that being judged to be, initial start-up decision maker 502 is exported the signal that short switch 104 is made as to open-circuit condition to short switch operation equipment 506.

Voltage decision maker 504 judges whether the voltage of the point between starting resistance 102 and actuating motor 100 meets predefined determinating reference.In the situation that being judged to be to meet benchmark, voltage decision maker (voltage determinant) 504 is made as short switch 104 to short switch operation equipment (short switch operator) 506 outputs the signal of short-circuit condition.

In the situation that being judged to be not meet benchmark, voltage decision maker 504 is exported the signal that short switch 104 is made as to open-circuit condition to short switch operation equipment 506.

Short switch operation equipment 506, in the case of having accepted short switch 104 to be made as the signal of short-circuit condition from initial start-up decision maker 502 or voltage decision maker 504, operates short switch 104 and is made as short-circuit condition.

Electric current is suppressed to resistance 102 in the time of initial start-up and be made as short circuit, thus the engine start time can shorten initial start-up time, even and also can ato unit under the condition reducing in the output of the actuating motors such as low temperature environment 100.

In embodiments of the invention 5, can obtain the effect identical with embodiment 1.

As shown above, engine start control device of the present invention has following effect: the device that does not need the voltage status that detects the battery configuring in vehicle side, the instantaneous interruption of the vehicle boarded electrical equipment producing just can suppress engine start time, and can guarantee the formedness of engine start.

In addition, the present invention is not limited to the above embodiments, comprises various variation.For example, the above embodiments are detailed descriptions of carrying out in order easily to understand the present invention, not necessarily will possess illustrated all formations.

In addition, a part for a certain embodiment's formation can be replaced into other embodiments' formation, and can in a certain embodiment's formation, append other embodiments' formation.In addition, other formations can be appended, delete or be replaced to a part for the formation to each embodiment.

In addition, part or all of above-mentioned each formation, function, processing division, processing means etc. for example can be by being realized by cause hardware such as intergrated circuit design.

In addition, above-mentioned each formation, function etc. can be to explain and carry out by processor the program that realizes each function, come thus to realize by software.Realizing the signals such as the program, form, file of each function can be placed in the recording mediums such as the recording devices such as storage, hard disk, SSD (Solid State Drive) or IC-card, SD card, DVD.

In addition, guide line or signaling line to illustrate in order illustrating required, all guide lines or signaling line not necessarily will to be shown on product.In fact also can think that nearly all formation is all connected to each other.

Symbol description:

1 ... motor, 2 ... starter, 5 ... small gear, 6 ... crankshaft, 7 ... ring gear, 100 ... actuating motor, 102 ... starting resistance, 104 ... short switch, 106 ... voltage decision maker, 108 ... enable switch, 110 ... battery, 200 ... solenoid switch, 202, 304 ... fly-wheel diode, 204, 302 ... bleeder circuit, 206 ... N-shaped MOSFET, 300 ... p-type MOSFET, 400 ... semiconductor switch, 402 ... electrical current determination device, 404 ... pwm signal follower, 502 ... initial start-up decision maker, 504 ... voltage decision maker, 506 ... short switch operation equipment.

Claims

1. an engine starting gear for vehicle, this engine starting gear is characterised in that to possess:

Actuating motor, it obtains the supply of electric power from being equipped on the electric accumulator of vehicle, for ato unit;

Current suppressor, it is in series electrically connected with above-mentioned actuating motor, suppresses to flow into from above-mentioned electric accumulator the electric current of above-mentioned actuating motor; With

Short circuit open-circuit condition switch, it switches to any state in short-circuit condition and open-circuit condition at least according to the both end voltage of above-mentioned actuating motor by the two ends of above-mentioned current suppressor.

2. engine starting gear according to claim 1, is characterized in that,

One end of above-mentioned actuating motor is grounded, and the other end of above-mentioned actuating motor is connected with one end of above-mentioned current suppressor, and the other end from above-mentioned electric accumulator to above-mentioned current suppressor is supplied with electric current,

Described engine starting gear possesses voltage determinant, the current potential of point between this voltage determinant the other end and one end of above-mentioned current suppressor based on above-mentioned actuating motor and the current potential of one end of actuating motor poor, operates above-mentioned short circuit open circuit switch.

3. engine starting gear according to claim 2, is characterized in that,

When the difference of the current potential of point between the other end of above-mentioned actuating motor and one end of above-mentioned current suppressor and the current potential of one end of above-mentioned actuating motor has exceeded predefined benchmark, above-mentioned voltage determinant provides command signal to above-mentioned short circuit open-circuit condition switch, and above-mentioned current suppressor is made as to short-circuit condition.

4. engine starting gear according to claim 1, is characterized in that,

Described engine starting gear possesses voltage determinant, current potential between current potential and above-mentioned current suppressor and the above-mentioned electric accumulator of the point between this voltage determinant the other end and one end of above-mentioned current suppressor based on above-mentioned actuating motor poor, operates above-mentioned short circuit open circuit switch.

5. engine starting gear according to claim 4, is characterized in that,

The difference of the current potential between the current potential of the point between the other end of above-mentioned actuating motor and one end of above-mentioned current suppressor and above-mentioned current suppressor and above-mentioned electric accumulator is lower than predefined benchmark, and above-mentioned current suppressor is made as short-circuit condition by above-mentioned short circuit open-circuit condition switch.

6. according to the engine starting gear described in any one in claim 1 to 5, it is characterized in that,

Above-mentioned short circuit open-circuit condition switch is mechanical relay.

7. according to the engine starting gear described in any one in claim 1 to 5, it is characterized in that,

Above-mentioned short circuit open-circuit condition switch is semiconductor switch.

8. engine starting gear according to claim 7, is characterized in that,

Described engine starting gear possesses pwm signal generator, and this pwm signal generator produces controls the conducting of above-mentioned semiconductor switch and the pwm signal of cut-off,

The current potential of point between the above-mentioned voltage determinant the other end and one end of above-mentioned current suppressor based on above-mentioned actuating motor and the current potential of one end of actuating motor poor, provide signal to above-mentioned pwm signal generator, said PWM signal generator provides pwm signal according to provided signal to above-mentioned semiconductor switch.

9. engine starting gear according to claim 1, is characterized in that,

Described engine starting gear possesses:

Voltage determinant, it judges current potential poor of the current potential of point between the other end of above-mentioned actuating motor and one end of above-mentioned current suppressor and one end of actuating motor; With

Initial start-up determinant, it judges that above-mentioned motor is that motor after initial start-up or engine automatic stop starts again,

In the time that above-mentioned initial start-up determinant is judged to be above-mentioned motor and is initial start-up, above-mentioned current suppressor is made as short-circuit condition by above-mentioned short circuit open-circuit condition switch, being judged to be above-mentioned motor at above-mentioned initial start-up determinant is while again starting, above-mentioned short circuit open-circuit condition switch, according to the voltage at the two ends of above-mentioned actuating motor, switches to any state in short-circuit condition or open-circuit condition by the two ends of above-mentioned current suppressor.