CN101340108A - Electrical power control unit - Google Patents
Electrical power control unit Download PDFInfo
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- CN101340108A CN101340108A CN 200810129587 CN200810129587A CN101340108A CN 101340108 A CN101340108 A CN 101340108A CN 200810129587 CN200810129587 CN 200810129587 CN 200810129587 A CN200810129587 A CN 200810129587A CN 101340108 A CN101340108 A CN 101340108A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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Abstract
A power control device comprises a synchronous generator (31), an electric storage device (37, 51) and a control unit (40). The synchronous generator is a permanent magnet type synchronous generator driven by an engine to generate AC electrical power. The electric storage device is connected to the synchronous generator by a switch device (36). The control unit detects the charge voltage of the electric storage device; when the charge voltage is higher than a threshold voltage, the stitch is turned off; when the charge voltage is lower than the threshold voltage, the switch is turned on, thereby improving the fuel efficiency of the engine.
Description
Technical field
The present invention relates to a kind of power control, more specifically, relate to and a kind ofly comprise permanent magnet formula synchronous generator and with the power control of the electric power storing device such as storage battery of the power charge that generator produced.
Background technology
Conventional power supply comprises: generator (permanent magnet formula synchronous generator), and it is by motor driven, and along with armature and permanent magnet relatively rotating and produce AC electric power each other; Storage battery, by power charge that generator produced (for example, JP-A-2006-141143).Another kind of conventional supply unit comprises: generator (electromagnet formula synchronous generator), and it is by motor driven, and along with armature and electromagnet relatively rotating and produce AC electric power each other; Storage battery is by the power charge that generator produced.
Yet, in the supply unit that comprises permanent magnet formula synchronous generator, can not as electromagnet formula synchronous generator, control the output voltage of permanent magnet formula synchronous generator.Therefore, be difficult to control the charging of generator to storage battery.
In other words, electromagnet formula synchronous generator can come control output voltage by by means of the increasing/subtract and regulate magnetic field of exciting current.Therefore, in the power control that comprises electromagnet formula synchronous generator, at the output voltage of the voltage-regulation electromagnet formula synchronous generator of storage battery, so that the control generator is to the charging of storage battery.On the other hand, owing to magnetic field is produced by permanent magnet, so permanent magnet formula synchronous generator then can not come control output voltage by regulating magnetic field.
Therefore, adopt the conventional supply unit that comprises permanent magnet formula synchronous generator, can not improve the fuel efficiency of engine by control permanent magnet formula synchronous generator to the charging of storage battery or by controlling generator for electricity generation to the load that engine causes.
Summary of the invention
Main purpose of the present invention provides a kind of power control, be used for comprising by engine-driven permanent magnet formula synchronous generator with by the supply unit of the electric power storing device such as storage battery of this generator charging by control, improve the fuel efficiency of engine, and still keep the performance of supply unit.
According to a first aspect of the invention, a kind of supply unit comprises generator and electric power storing device.Generator is by motor driven, and produces AC electric power when armature and permanent magnet relatively rotate with respect to each other.Electric power storing device is by the power charge that generator produced, and output is based on the electric power of generator or electric power storing device.When the charging voltage of electric power storing device is higher than a threshold voltage, close (disconnection) supply path from the generator to the electric power storing device, to stop power supply to electric power storing device.When the charging voltage of electric power storing device is lower than this threshold voltage, connect (closure) this supply path, so that electric power storing device is powered.
At this, if closed the supply path from the generator to the electric power storing device, then engine just needn't be born because the load that generating causes again.In addition, when the charging voltage of electric power storing device is higher than a predetermined voltage (threshold voltage), that is, when electric power storing device is in abundant charged state, just needn't charge to electric power storing device.In addition, electric power storing device can be powered to electric loading.Therefore,, just can reduce engine loading, and improve fuel efficiency, still keep the performance of supply unit simultaneously in case when the charging voltage of electric power storing device is higher than this threshold voltage, closed supply path.
Can use storage battery or capacitor as electric power storing device.
Can on supply path, provide switching device, in order to close and to connect the supply path from the generator to the electric power storing device.Close this supply path by closing this switching device, and connect this supply path by opening this switching device.
Can power from electric power storing device, perhaps can be via switching device from generator powered, and control closing and connecting of supply path by control unit.In this configuration, switching device comprises often-cutting type (normally-shut off) switch element.Therefore, along with from the electric power storing device power supply, when engine start, carry out the On/Off control operation.Yet, in this case, if the charging voltage of electric power storing device approaches 0 (0 or the voltage lower than the operating voltage of the hardware that comprises control unit), although provide electric power from electric power storing device, also be difficult to carry out the On/Off control operation, and supply path keeps closing.For this, can when engine start, be used for the electric power of spontaneous motor directly to the power supply of open circuit, this open circuit substitutes control unit and operates, and opens switching device.Therefore, even control unit can not be carried out the On/Off control operation when engine start, also can connect supply path.
When the charging voltage of electric power storing device approaches 0, wish to use the means of manpower starting drive as ato unit, and with above starting drive ato unit.
Can use with manually driven people power apparatus and come ato unit, and when with this people's power apparatus ato unit, can control supply path and close or connect.
When personnel selection power apparatus ato unit, when starting, the charging voltage of electric power storing device is changed.Therefore, can correctly determine the charged state of electric power storing device according to charging voltage.This just can improve the fuel efficiency of engine, and still keeps the performance of supply unit.
Except the personnel selection power apparatus starts, can also come ato unit with the electrodynamic type starting drive, this electrodynamic type starting drive is driven by the electric power that provides from electric power storing device.When with electrodynamic type starting drive ato unit, another the different threshold voltage of threshold voltage based on personnel selection power apparatus ato unit the time is controlled closing and connecting of supply path.
Described people's power apparatus has different drive force source with described electrodynamic type starting drive, and therefore, by this point is considered to enter, threshold voltage has difference.
For example, when will be, can come ato unit by drive this people's power apparatus with bigger power by people's power apparatus ato unit, and no matter engine loading how.On the other hand, when will be by electrodynamic type starting drive ato unit, if engine loading greater than the actuating force that drive source produced of electrodynamic type starting drive, just can not ato unit.By this point is taken into account, be lower than the threshold voltage when choosing the power apparatus ato unit with regard to wishing threshold voltage with electrodynamic type starting drive ato unit the time.Therefore, when with electrodynamic type starting drive ato unit, suppress the generating of generator, and reduced to be applied to the load on the engine thus.This has just improved the startability of electrodynamic type starting drive to engine.
This threshold voltage can be set according to the temperature dynamic ground of engine.At this, engine loading changes according to the temperature of engine.For example, the friction loss of engine raises along with the reduction of engine temperature.Therefore, when dynamically setting described threshold voltage, that is, when changing the power generation mode of generator, can effectively improve the fuel efficiency of engine, and can not reduce the startability of engine according to engine loading according to engine temperature.In this case, for example, can come the calculation engine temperature based on the temperature of engine cooling water.
When the acceleration state of detection of engine and when determining to be in the deceleration regime, can be communicated with supply path, and no matter the charging voltage of electric power storing device how.
Therefore, can in electric power storing device, regenerate and brake energy when storing engine and being in the deceleration regime by generator.In addition, when regeneration in electric power storing device and storage brake energy, can increase the braking strength of engine.
According to a further aspect in the invention, a kind of electric power system comprises generator and electric power storing device.Generator is by motor driven, and produces AC electric power when armature and permanent magnet relatively rotate with respect to each other.Electric power storing device is by the power charge that generator produced, and output is based on the electric power of generator or electric power storing device.Particularly, this electric power system also comprises: often-cutting type (normally-open) switching device, and it disconnects and closed supply path from described generator to described electric power storing device; Power control, it is by powering from the electric power of described generator from the electric power of electric power storing device or via switching device, and the charging voltage of detection electric power storing device, when the charging voltage of the electric power storing device that is detected is higher than a threshold voltage, make the supply path of switching device disconnection from the generator to the electric power storing device, and when the charging voltage of working as the electric power storing device that is detected is lower than this threshold voltage, make the closed described supply path of switching device; And open circuit, it is by direct power supply from generator, and the operation of substitute electric power control device, so that open switch element when engine start.
The function of control unit can be with function by the hardware of structures shape, the hardware time that function is determined by computer program, and perhaps it makes up and realizes.In addition, the present invention not only can be defined as a kind of device, but also can be defined as storage medium or a kind of control method of a kind of program, this program.
Description of drawings
According to the detailed description below with reference to accompanying drawing, above-mentioned and other purposes, feature and advantage of the present invention will become more obvious.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the power control in the engine system of first embodiment of the invention;
Fig. 2 is the flow chart of the charging control program when engine start among first embodiment;
Fig. 3 is the flow chart of the charging control program during normal operation among first embodiment;
Fig. 4 is the sequential chart of the operation during by electrodynamic type starter ato unit among first embodiment;
Fig. 5 is the sequential chart of the operation during by foot-operated starter ato unit among first embodiment;
Fig. 6 is the sequential chart of the operation when traveling at the uniform speed, quickening to move and running slowly among first embodiment;
Fig. 7 is the schematic diagram according to the power control in the engine system of second embodiment of the invention;
Fig. 8 is the flow chart of the charging control program during normal operation among second embodiment.
Embodiment
Now, will with a plurality of embodiment the present invention be described in conjunction with the accompanying drawings.
First embodiment
In first embodiment, for the engine system of vehicle (for example sulky vehicle) provides a kind of power control.At first with reference to figure 1, this engine system comprises petrol engine 10, is used for supply unit 30 of powering to the electric loading of vehicle and the electronic control unit (ECU) 40 that is used to control the engine system various piece.
Upstream end at the inlet channel 11 of petrol engine 10 has electronically controlled choke valve 12.This choke valve 12 is driven by throttle valve motor 13, and changes the flow path area of inlet channel 11.Provide fuel injector 14 and intake valve 15 at the downstream part of inlet channel 11 for each cylinder of engine 10.When intake valve 15 was opened, inlet channel 11 was connected with combustion chamber 16, and flowed into combustion chamber 16 by the fuel that sprays from fuel injector 14 with from the formed mixture of the upstream inhaled air of inlet channel 11.When this mixture is lighted by the sparkover of spark plug 17, burning capacity is converted to the revolving force of bent axle 19 by piston 18.Along with opening of vent valve 20, discharge by the mixture that exhaust passage 21 will be used to burn.
Foot-operated starter 22 and electrodynamic type starter 23 are mechanically connected to bent axle 19.Foot-operated starter 22 is a kind of people's power apparatus, is made of pedal, Poewr transmission mechanism etc., and the power that Poewr transmission mechanism will be applied on the pedal passes to bent axle 19.Electrodynamic type starter 23 is a kind of electrodynamic type starting drives, is made of electrodynamic type starter motor, Poewr transmission mechanism etc., and Poewr transmission mechanism is given bent axle 19 with the transmission of power of electrodynamic type starter.Starter SW24 is connected to electrodynamic type starter 23, and operates electrodynamic type starter 23 by starter SW24.
The permanent magnet formula synchronous generator (AGC) 31 of supply unit 30 is mechanically connected to bent axle 19.Synchronous generator 31 has permanent magnet 32 and armature 33, and along with armature 33 that is driven by bent axle 19 and permanent magnet 32 rotate relative to one another, and produce AC electric power.Particularly, permanent magnet 32 is arranged on the direction of rotation of the flywheel 34 that is connected to bent axle 19.Armature 33 has power coil 35, is arranged in rotating magnetic field inside, and this rotating magnetic field is produced by bent axle 19 rotations the time by permanent magnet 32.
ECU 40 is connected to the door and the battery 37 of throttle valve motor 13, fuel injector 14, spark plug 17, starter SW24, thyristor 36.ECU 40 is a kind of electronic control units, and it comprises known microcomputer, is made of CPU, memory etc.Various programs of memory stores and parameter.CPU carries out the program that is stored in the memory, with the various control operations (throttle opening degree control, fuel injection amount control, ignition timing control or the like) of carrying out engine system according to engine behavior.Particularly, in this embodiment, the charging of 31 pairs of batteries 37 of CPU control synchronous generator.
Next, the charging operations of 31 pairs of batteries 37 of synchronous generator is described with reference to figure 2 and 3, Fig. 2 and 3 shows the charging control program of carrying out when petrol engine 10 starts, and the charging control program that (in other operating process except starting) are carried out in the normal course of operation of petrol engine 10.These programs are carried out by ECU with predetermined space (each predetermined crank angle, perhaps each preset time cycle).
(the charging control during engine start)
If ECU 40 determines startup time from petrol engine 10 as yet not through a predetermined amount of time, then ECU 40 carries out the charging control program when engine start shown in Figure 2.According to this program,, control 37 chargings of 31 pairs of batteries of synchronous generator based on the voltage (cell voltage) of battery 37.Particularly, cell voltage and threshold voltage (predetermined voltage of setting according to the method that starts petrol engine 10) are compared,, allow or forbid 37 chargings of 31 pairs of batteries of synchronous generator according to this result relatively.At this, will when starting petrol engines 10, employed second threshold voltage settings be employed first threshold voltage height when starting petrol engines 10 than usefulness electrodynamic type starter 23 with foot-operated starter 22.
In the step S10 of Fig. 2, ECU 40 checks the startup method.Particularly, ECU 40 checks for example whether operated starter SW24.That is,, determine that then petrol engine 10 is to start with electrodynamic type starter 23 if operated starter SW24.If operation start device SW24 does not determine that then petrol engine 10 is to start with foot-operated starter 22.If it is to start with electrodynamic type starter 23 that ECU 40 determines petrol engine 10, then flow process advances to S11, is to start with foot-operated starter 22 if ECU 40 determines petrol engine 10, and then flow process advances to S12.
In step S11, ECU 40 detects cell voltage, and checks whether cell voltage VB is higher than first threshold voltage Vth1.If ECU 40 determines that cell voltage VB is lower than first threshold voltage Vth1, then flow process advances to step S13, if ECU 40 determines that cell voltage VB is higher than first threshold voltage Vth1, then flow process advances to step S14.In step S12, ECU 40 detects cell voltage, and checks whether cell voltage VB is higher than the second threshold voltage vt h2.If ECU 40 determines that cell voltage VB is lower than the second threshold voltage vt h2, then flow process advances to step S13, if ECU 40 determines that cell voltage VB is higher than the second threshold voltage vt h2, then flow process advances to step S14.
In step S13, ECU 40 connect (closure) from synchronous generator 31 to battery 37 supply path.Particularly, open thyristor 36.On the other hand, in step S14, ECU 40 close (disconnection) from synchronous generator 31 to battery 37 supply path.Particularly, ECU 40 closes thyristor 36.After the processing of having carried out step S13 or step S14, the processing of the charging control program when ECU 40 finishes this time startup.
(normal operating charging control)
If passed through a predetermined amount of time computing time when ECU 40 determined from the startup of petrol engine 10, the charging control program in the normal mode carried out as shown in Figure 3 of ECU 40 then.According to this program.Based on the running status of petrol engine 10 (at the uniform velocity, quicken or slow down), control the charging of 31 pairs of batteries 37 of synchronous generator.In other words, traveling at the uniform speed or when quickening to move,, allow or forbid the charging of 31 pairs of batteries 37 of synchronous generator at petrol engine 10 according to cell voltage, when the running slowly of petrol engine 10, then allow the charging of 31 pairs of batteries 37 of synchronous generator always.
In the step S20 of Fig. 3, ECU 40 checks the running status (at the uniform velocity, acceleration or deceleration) of petrol engine 10.Particularly, ECU 40 calculates each variable quantity in the rotating speed of petrol engine 10, and determines running status based on this variable quantity.At this, can provide acceleration sensor, so that determine running status based on the signal that this acceleration sensor detected.
In step S20, be checked through petrol engine 10 and be in and travel at the uniform speed or when quickening running status, in step S21, ECU 40 detects cell voltage VB, and check whether cell voltage VB is higher than the 3rd threshold voltage vt h3.If ECU 40 determines that cell voltage VB is higher than the 3rd threshold voltage vt h3, then flow process advances to step S22, if ECU 40 determines that cell voltage VB is lower than the 3rd threshold voltage vt h3, then flow process advances to step S23.On the other hand, if determine that in step S20 petrol engine 10 is in the state of running slowly, then ECU 40 advances to the processing of step S23.
In step S22, ECU 40 closes from synchronous generator 31 to battery 37 supply path.Particularly, ECU 40 closes thyristor 36.On the other hand, in step S23, ECU 40 opens from synchronous generator 31 to battery 37 supply path.Particularly, ECU 40 opens thyristor 36.After the processing in step S22 or step S23, the processing that ECU 40 finishes at this subnormal operating charging control program.
Next, will be with reference to the operation of figure 4 to 6 describing series system.Fig. 4 is the sequential chart of the operation when starting with electrodynamic type starter 23, and Fig. 5 is the sequential chart of the operation when starting with foot-operated starter 22, and Fig. 6 schemes in the time sequential routine when traveling at the uniform speed, quickening to move and running slowly.In Fig. 4 and Fig. 5, (a) On/Off of expression activator switch 24, it has indicated the On/Off of electrodynamic type starter 23, (b) rotating speed of expression petrol engine 10, (c) expression cell voltage VB, and the On/Off of (d) representing thyristor 36.In Fig. 6, (a) rotating speed of expression petrol engine 10, (b) expression cell voltage VB, and the On/Off of (c) representing thyristor 36.Suppose that during the whole service shown in Fig. 6 cell voltage VB is higher than the 3rd threshold voltage vt h3.
(operation during electrodynamic type starter ato unit)
Moment t1 in Fig. 4, when starter SW24 is unlocked, the actuating force of electrodynamic type starter 23 operation petrol engine 10 (Fig. 4 (a) and (b)).At the moment, electric power is supplied to electrodynamic type starter 23 from battery 37, and therefore, cell voltage temporarily descend (Fig. 4 (c)).In the time durations till having passed through a predetermined set time section from moment t1 to moment t4, the charging control program that ECU 40 carries out when starting, that is, and electric power control during startup.
In moment t1 to t2, cell voltage is lower than first threshold voltage Vth1 (for example 10V).Therefore, under the control of ECU 40, thyristor 36 is held open (Fig. 4 (d)).This moment, electric power is supplied to battery 37 from synchronous generator 31, but electrodynamic type starter 23 also consumes electric power.Therefore, cell voltage does not rise.
After burning had taken place for the first time moment t2, from then on engine speed rose to idling speed (for example 1500rpm), during this period in, the electric power that is produced with synchronous generator 31 charges to battery 37, and cell voltage raises gradually.Along with cell voltage arrives first threshold voltage Vth1 at moment t3, under the control of ECU 40, thyristor 36 is closed, and electric power is not supplied to battery 37 from synchronous generator 31.Therefore, cell voltage rises a period of time after moment t3, descends gradually subsequently.
After described predetermined set time section has been passed through in moment t1 calculating, ECU 40 no longer carries out the charging control program when starting, but carries out the charging control program when normally moving.In other words, based on the three threshold voltage vt h3 (for example 13V) higher, carry out charging control than first threshold voltage Vth1.Thus, under the control of ECU 40, open thyristor 36, once more electric power is supplied to battery 37 from synchronous generator 31.Therefore, cell voltage descends a period of time after moment t4, rises gradually once more subsequently, and wherein, this moment t4 is the moment of having passed through above-mentioned predetermined set time section from moment t1 calculating.
Along with cell voltage rises to the 3rd threshold voltage vt h3 at moment t5, under the control of ECU 40, close thyristor 36, electric power is not supplied to battery 37 from synchronous generator 31.Therefore, cell voltage rises a period of time after moment t5, but descends gradually subsequently.
Along with cell voltage drops to the 3rd threshold voltage vt h3 at moment t6, under the control of ECU 40, open thyristor 36, and once more electric power is supplied to battery 37 from synchronous generator 31.Therefore, cell voltage descends a period of time after moment t6, but rises gradually subsequently.Similarly, after this, cell voltage is controlled to be near the 3rd threshold voltage vt h3.
(operation when starting) with foot-operated starter
Moment t10 in Fig. 5, when pressing the pedal of foot-operated starter 22, the actuating force of foot-operated starter 22 operation petrol engine 10 (Fig. 5 (b)).When starting, start the fluctuation (Fig. 5 (c)) that can not cause cell voltage with foot-operated starter 22.
When starting with foot-operated starter 22, (for example 11V) controls charging based on second threshold voltage.In other words,, under the control of ECU 40, close thyristor 36, electric power is not supplied to battery 37 from synchronous generator 31 along with cell voltage arrives second threshold voltage at moment t11.Therefore, cell voltage rises a period of time after moment t11, descends gradually subsequently.The operation of petrol engine 10 after moment t12 is identical with the operation of petrol engine 10 after moment t4 among Fig. 5 basically, and wherein, t12 calculates the moment of having passed through a predetermined set time section from moment t10 constantly.
(operation when traveling at the uniform speed, quickening to move and running slowly)
In the moment t20 shown in Fig. 6 was during the t21, petrol engine 10 was in the acceleration running status, and in this state, engine speed increases.In moment t21 was during the t22, petrol engine 10 was in the state of traveling at the uniform speed, in this state, and engine speed almost constant (Fig. 6 (a)).In addition, as mentioned above, cell voltage becomes and is higher than the 3rd threshold voltage (for example 13V) (Fig. 6 (b)).Therefore, in above two time periods, under the control of ECU 40, close thyristor 36 (Fig. 6 (c)), electric power is not supplied to battery 37 from synchronous generator 31.
On the other hand, in moment t22 was during the t23, petrol engine 10 was in the state of running slowly, in this state, and engine speed descend (Fig. 6 (a)).During running slowly, no matter cell voltage how, thyristor 36 is held open (Fig. 6 (c)).Therefore, electric power is supplied to battery 37 from synchronous generator 31.
According to the embodiment of above detailed description, provide following advantage.
Providing thyristor 36 37 the supply path, in order to close supply path from synchronous generator 31 to battery.According to this configuration, close supply path by thyristor 36, suppress the electromagnetic force effect between power coil 35 and the permanent magnet 32, reduce thus because the load that generating is caused petrol engine 10.
In addition, when petrol engine 10 starts, in it travels at the uniform speed state and at it, quicken in the running status, if cell voltage VB is higher than predetermined voltage (first threshold voltage Vth1, the second threshold voltage vt h2 or the 3rd threshold voltage vt h3), then close from synchronous generator 31 to battery 37 supply path, to forbid the charging of 31 pairs of batteries 37 of synchronous generator.If cell voltage VB is lower than threshold voltage, then be communicated with this supply path, to allow the charging of 31 pairs of batteries 37 of synchronous generator.At this, if cell voltage VB is higher than threshold voltage, that is,, then just needn't charge to battery 37 if battery 37 fully charges, and can be corresponding to electric loading from battery 37 power supplies.Therefore, be higher than at cell voltage VB under the situation of threshold voltage, forbid by 37 chargings of 31 pairs of batteries of synchronous generator.In other words, reduce the load of petrol engine 10, and still kept the performance of supply unit 30, and improved fuel efficiency.
In addition, in the running slowly of petrol engine 10, no matter cell voltage VB how, connects from synchronous generator 31 to battery 37 supply path.Therefore, as long as petrol engine 10 is in the state of running slowly, just allow by 37 chargings of 31 pairs of batteries of synchronous generator, the feasible brake energy that can in battery 37, regenerate and store during running slowly always.
In addition, first to the 3rd threshold voltage vt h1 differs from one another to Vth3.This just can control the charging of 31 pairs of batteries 37 of synchronous generator according to the running status of petrol engine 10.
Particularly, first threshold voltage Vth1 is set at is lower than the second threshold voltage vt h2.At this, in the time will starting petrol engine 10, no matter whether the load of petrol engine 10 is bigger, all drive foot-operated starter 22 (driver depresses pedal with bigger power), thereby start petrol engine 10 with bigger power with foot-operated starter 22.On the other hand, in the time will starting petrol engine 10 with electrodynamic type starter 23, if the load of petrol engine 10 then can not start petrol engine 10 during greater than the actuating force that drive source produced of electrodynamic type starter 23 (if the load of petrol engine 10 is greater than actuating force of starter).
For this, be lower than the second threshold voltage vt h2 if as mentioned above first threshold voltage Vth1 is set at, then in the time will starting petrol engine 10, suppressed the generating of synchronous generator 31 with electrodynamic type starter 23, the load of petrol engine 10 can reduce.Startability when this just improves electrodynamic type starter 23 startup petrol engines 10.At this,, can in the time will starting petrol engine 10, forbid the generating of synchronous generator 31 with electrodynamic type starter 23 by first threshold voltage Vth1 is set at 0V.
Second embodiment
In a second embodiment, a kind of engine system is used to exempt from battery (batteryless) vehicle (particularly, being used for sulky vehicle), and structure as shown in Figure 7.
This engine system does not have the electrodynamic type starter, only has foot-operated starter 22 to be mechanically connected to bent axle 19.Similar with the supply unit 30 among first embodiment, supply unit 30 comprises synchronous generator 31 and thyristor 36.Yet, at this, replace the battery 37 (Fig. 1) among first embodiment, capacitor 51 is connected to synchronous generator 31 via thyristor 36, capacitor 51 is as electric power storing device.ECU 40 is connected to supply unit 30 via the power line (not shown).In other words, the electric loading of vehicle includes ECU 40.By synchronous generator 31 or capacitor 51 power supplies the time, ECU 40 opening and closing thyristors 36.
At this, thyristor 36 is switching devices of often-cutting type (normally-open).When petrol engine 10 starts, by capacitor 51 power supplies the time, ECU 40 opening and closing thyristors 36.Yet usually, the electric weight that capacitor institute can store in addition, is compared with storage battery less than the electric weight of storage battery, and capacitor allows to discharge and causes charging voltage to descend quickly.Particularly, from reducing cost and reduce the position of supply unit size, the power supply of sulky vehicle tends to the capacitor that adopts size less,, tends to the capacitor that adopts storing electricity less that is.Therefore, when petrol engine 10 starts (before startup moment and start back moment), the charging voltage of capacitor 51 may approach 0 (0, perhaps than a little voltage of voltage that is used to drive ECU 40).
Therefore,, between ECU 40 and thyristor 36, provide thyristor switch circuit 52, so that in case directly receive electric power with regard to opening and closing thyristor 36 from synchronous generator 31 according to present embodiment.Thyristor switch circuit 52 is receiving from ECU 40 when closing the control signal of thyristor 36, produces in order to close the switching signal of thyristor 36.In other cases, that is, when receiving from ECU 40 in order to the control signal of opening thyristor 36 with not when ECU 40 receives correct control signal, thyristor switch circuit 52 produces in order to open the switching signal of thyristor 36.Thyristor switch circuit 52 can perhaps can be configured to be independent of the hardware of power circuit 30 and ECU 40 in ECU 40.
The operation of thyristor switch circuit 52 when next, being described in petrol engine 10 startups.In the following description, the charging voltage of supposing capacitor 51 approached 0 before petrol engine 10.
Before petrol engine 10 started, the charging voltage of capacitor 51 approached 0, and therefore, ECU40 does not work.In case operated foot-operated starter 22, bent axle 19 rotations, synchronous generator 31 produces AC electric power.Feed electrical power to thyristor switch circuit 52.In case be powered, thyristor switch circuit 52 just produces in order to open the switching signal of thyristor 36.Therefore, thyristor 36 is opened, and via thyristor 36 electric power is supplied to ECU 40 from synchronous generator 31.Below, along with becoming, the voltage that supplies to ECU 40 from synchronous generator 31 is higher than the operating voltage of ECU 40, and ECU 40 starts working.Therefore, the various piece of ECU 40 control engine systems, and petrol engine 10 brings into operation.
Next, be described in the normal operating condition of petrol engine 10 control with reference to figure 8 to capacitor 51 chargings.After a predetermined amount of time has been passed through in calculating from petrol engine 10 startups the time, carry out this control program with fixed intervals (each predetermined crank angle or each predetermined period of time) by ECU 40.
Charging control described below is different with the charging control (Fig. 3) of first embodiment, the cell voltage VB that the charging of first embodiment control is based on battery 37 controls thyristor 36, and charging described below control is based on the charging voltage VC of capacitor 51 and controls thyristor 36.
In the step S30 shown in Fig. 8, ECU 40 adopts the mode identical with step S20 shown in Figure 3, the running status of inspection petrol engine 10 (at the uniform velocity/acceleration).
Be in the state of traveling at the uniform speed or quicken running status if determine petrol engine 10 in step S30, then ECU 40 detects the charging voltage VC of capacitor 51, and checks whether charging voltage VC is somebody's turn to do and the 4th threshold voltage vt h4.If ECU 40 determines that charging voltage VC is higher than the 4th threshold voltage vt h4, then flow process advances to the processing among the step S32.If ECU 40 determines that charging voltage VC is lower than the 4th threshold voltage vt h4, then flow process advances to the processing among the step S33.On the other hand, if determine that in step S30 petrol engine 10 is in the state of running slowly, then ECU 40 advances to the processing among the step S33.
In step S32, ECU 40 sends control signals to thyristor switch circuit 52, to close thyristor 36.Therefore, closed from synchronous generator 31 to capacitor 51 supply path.On the other hand, in step S33, ECU 40 sends control signals to thyristor switch circuit 52, to open thyristor 36.Therefore, connect from synchronous generator 31 to capacitor 51 supply path.After the processing in having carried out step S32 or step S33, ECU 40 finishes the processing of this normal operating charging control program.
Similar with first embodiment, the engine system of exempting from fuel cell vehicle according to second embodiment, can improve the fuel efficiency of petrol engine 10, still keep the performance of supply unit 30 simultaneously, and can in battery 37, regenerate and be stored in the brake energy when running slowly.
In addition,, when it starts at petrol engine 10, replace ECU 40, when directly when ACG 31 powers, being opened thyristor 36 for supply unit 30 provides thyristor switch circuit 52.Therefore, even the charging voltage of capacitor 51 approached when petrol engine 10 starts, also can start petrol engine 10 at 0 o'clock with foot-operated starter 22.
(other embodiment)
The present invention also only is not limited to above-mentioned enforcement, but can as described belowly realize.
In above embodiment, control the charging of supply unit 30 according to preset threshold value voltage.Yet described threshold voltage can dynamically be set.
For example, threshold voltage can change according to the temperature of petrol engine 10.In this case, can calculate the temperature of petrol engine 10 according to detection signal from the cooling-water temperature sensor that is used to detect petrol engine 10 cooling water temperatures.The load of petrol engine 10 changes according to the temperature of petrol engine 10.For example, the friction loss of petrol engine 10 raises along with the reduction of the temperature of petrol engine 10.Therefore, change threshold voltage by aforesaid problem according to petrol engine 10, that is, and by change the power generation mode of synchronous generator 31 according to the load of petrol engine 10, can effectively improve the fuel efficiency of petrol engine 10, and can not reduce the startability of petrol engine 10.
More than each embodiment described petrol engine 10 travel at the uniform speed, quicken operation and run slowly during the operation of charging of control 31 pairs of electric power storing devices of synchronous generator (for example, battery 37 and capacitor 51).Yet idle, the hot car that also can allow to set with petrol engine 10 moves and the corresponding threshold voltage of other running statuses, and according to carrying out above charging control with the corresponding threshold voltage of running status.For example, in service at idle or hot car, it is unstable relatively that the operation of petrol engine 10 becomes, and wish to reduce the load of engine 10.Therefore, can will move corresponding threshold voltage settings for being lower than the 3rd threshold voltage with idle or hot car.
In addition, in above each embodiment, suppose during petrol engine 10 runs slowly, to allow 31 pairs of electric power storing devices of synchronous generator (for example, battery 37 and capacitor 51) charging always.Yet, also can allow to set and the corresponding threshold voltage of running slowly of petrol engine 10, and based on carrying out above charging control with the corresponding threshold voltage that runs slowly.
In addition, in above each embodiment, allow according to the charging voltage of electric power storing device (battery 37, capacitor 51) in the acceleration of petrol engine 10 operation or in traveling at the uniform speed or forbid electric power storing device is charged.Yet, quickening in servicely, can regardless of the charging voltage of electric power storing device how, forbid electric power storing device is charged by closing the supply path of from synchronous generator 31 to electric power storing device (battery 37, capacitor 51).In the case, can when the acceleration operation of petrol engine 10, reduce the load of 31 pairs of engines 10 of synchronous generator.This just can improve in vehicle accelerating period steerability.
In addition, in above first embodiment, first threshold voltage is set at is lower than second threshold voltage.Yet, first threshold voltage can be set at and be higher than second threshold voltage.For example, if start petrol engine 10 with electrodynamic type starter 23, the cell voltage after might starting becomes the operating voltage that is lower than ECU 40.In the case, just might can start by petrol engine 10, but can't normally move.By this point is taken into account, as mentioned above, when starting petrol engines 10, first threshold voltage is set at is higher than second threshold voltage, so that the generating of acceleration synchronization generator 31 with electrodynamic type starter 23.
In addition, in above first embodiment, first threshold voltage to the three threshold voltages differ from one another.Yet these threshold voltages can combine arbitrarily, form same voltage.In addition, the charging of carrying out when traveling at the uniform speed and quicken to move based on the 3rd identical threshold voltage is controlled.Yet in our these two running statuses, threshold voltage can be different.In addition, can provide default for first threshold voltage to the three threshold voltages.
In addition, in above first embodiment, by the supply path of closing or connect from synchronous generator 31 to battery 37 as the thyristor 36 of switching device.Yet this switching device can be the circuit that comprises a plurality of elements (transistor, thyristor or the like).
In addition, in above first embodiment, when starting, petrol engine 10 begins to carry out the charging control when starting, up to having passed through predetermined set time section; And after predetermined set time section had been passed through in calculating from petrol engine 10 startups the time, the charging of carrying out when normal the operation was controlled.In other words, based on calculate elapsed time when petrol engine 10 starts, whether the running status of checking engine 10 is the running status when starting.Yet, also can allow to check that based on the rotating speed of petrol engine 10 whether the running status of engine 10 is the running status when starting.
Engine system with foot-operated starter 22 and electrodynamic type starter 23 has been described among each embodiment in addition.Yet the present invention can be applied to only have the engine system of foot-operated starter 22, perhaps only has the engine system of electrodynamic type starter 23.And it not is the engine system of vehicular applications that the present invention can be applied to, and the engine that can be applied to adopt not is to be petrolic engine system (for example Diesel engine).
Claims (10)
1, a kind of power control that is used for supply unit (30), described supply unit (30) comprises generator (31) and electric power storing device (37,51), described generator is driven by engine (10), produce AC electric power when relatively rotating with respect to each other at armature (33) and permanent magnet (32), and the power charge that described electric power storing device produces with described generator, described power control comprises:
Voltage detection module (40) is used to detect the charging voltage of described electric power storing device; And
Control unit (40), when the charging voltage of the described electric power storing device that described voltage detection module detected is higher than a threshold voltage, close supply path from described generator to described electric power storing device, and when the charging voltage of the described electric power storing device that described voltage detection module detected is lower than this threshold voltage, connect described supply path.
2, power control as claimed in claim 1, wherein:
Described supply unit (30) comprises storage battery (37), as described electric power storing device; And
Described supply path is closed or connected to described control unit (40) based on the charging voltage of described storage battery.
3, power control as claimed in claim 1, wherein:
Described supply unit (30) comprises switching device (36,52), and it is positioned on the described supply path, is used to close or connects described supply path; And
Described control unit (40) is closed described supply path by closing described switching device, perhaps connects described supply path by opening described switching device.
4, power control as claimed in claim 3, wherein, described switching device (36,52) comprising:
Often-cutting type switch element (36), it is by described control unit opening and closing; And
Open circuit (52), it, and substitutes described control unit and operates from the power supply of described generator by directly, so that open described switch element when described engine start.
5, as any described power control in the claim 1 to 4, wherein:
People's power apparatus (22) is provided, has been used for driving and starts described engine by manpower; And
When starting described engine with described people's power apparatus, described supply path is closed or connected to described control unit (40).
6, power control as claimed in claim 5, wherein:
Electrodynamic type starting drive (23) is provided,, has started described engine in order to by driving by the electric power that provides from described electric power storing device; And
When starting described engine with described electrodynamic type starting drive, described control unit (40) according to the different threshold voltage of threshold voltage when starting described engine with described people's power apparatus, close or connect described supply path.
7, power control as claimed in claim 6, wherein:
Threshold voltage when starting described engine with described electrodynamic type starting drive is lower than the threshold voltage when starting described engine with described people's power apparatus.
8, as any described power control in the claim 1 to 4, wherein:
According to the temperature of described engine, dynamically set described threshold voltage.
9, as any described power control in the claim 1 to 4, wherein:
Described control unit (40) is determined the acceleration state of described engine; And
When determining to be described deceleration regime, described control unit (40) is connected described power supply circuits, and no matter the charging voltage of described electric power storing device how.
10, a kind of electric power system, it comprises generator (31) and electric power storing device (37,51), described generator is driven by engine (10), produce AC electric power when relatively rotating with respect to each other at armature (33) and permanent magnet (32), and the power charge that described electric power storing device produces with described generator, described electric power system comprises:
Often-cutting type switching device (36), it disconnects and closed supply path from described generator to described electric power storing device;
Power control (40), it is by powering from the electric power of described generator from the electric power of described electric power storing device or via described switching device, and detect the charging voltage of described electric power storing device, when the charging voltage of the described electric power storing device that is detected is higher than a threshold voltage, close described switching device to close supply path from described generator to described electric power storing device, and when the charging voltage of working as the described electric power storing device that is detected is lower than this threshold voltage, open described switching device to connect described supply path; And
Open circuit (52), it, and substitutes described control unit and operates from the power supply of described generator by directly, so that open described switch element when described engine start.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007175074 | 2007-07-03 | ||
| JP175074/2007 | 2007-07-03 | ||
| JP008406/2008 | 2008-01-17 |
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| CN101340108A true CN101340108A (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810129587 Pending CN101340108A (en) | 2007-07-03 | 2008-07-02 | Electrical power control unit |
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| JP (1) | JP4867922B2 (en) |
| CN (1) | CN101340108A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780256A (en) * | 2012-07-27 | 2012-11-14 | 浙江吉利汽车研究院有限公司杭州分公司 | Charge control system for vehicle storage battery |
| RU2544847C2 (en) * | 2009-07-13 | 2015-03-20 | Дженерак Пауэр Системс, Инк. | Control method for fixed-frequency generator with variable engine speed |
| CN109001626A (en) * | 2017-05-22 | 2018-12-14 | 英飞凌科技股份有限公司 | Improved troubleshooting for alternating current generator control apparatus |
| WO2019015624A1 (en) * | 2017-07-19 | 2019-01-24 | Huawei Technologies Co., Ltd. | Three-level voltage bus apparatus and method |
| CN109665470A (en) * | 2018-12-29 | 2019-04-23 | 徐州海伦哲特种车辆有限公司 | A kind of electronic high-altitude operation vehicle energy-saving control system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6993824B2 (en) * | 2017-09-22 | 2022-01-14 | 株式会社日立産機システム | Power generation system and rotary electric assembly used for it, operation method |
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| JPS59148536A (en) * | 1983-02-08 | 1984-08-25 | スズキ株式会社 | Charger of automotive battery |
| JPS61132046A (en) * | 1984-11-30 | 1986-06-19 | 新電元工業株式会社 | Atmospheric pressure adjustor for magnet type ac generator |
| JPH03173325A (en) * | 1989-11-30 | 1991-07-26 | Mitsubishi Electric Corp | Ac generator controller for vehicle |
| JP2610553B2 (en) * | 1991-12-19 | 1997-05-14 | 株式会社ユニシアジェックス | Engine start control device |
| JP3329037B2 (en) * | 1993-12-10 | 2002-09-30 | 株式会社デンソー | Output current control device for vehicle generator |
| JP2001082299A (en) * | 1999-09-10 | 2001-03-27 | Mitsuba Corp | Ignition controller |
| JP3975937B2 (en) * | 2003-02-17 | 2007-09-12 | トヨタ自動車株式会社 | Battery charge control device and charge control method |
| JP4299055B2 (en) * | 2003-05-23 | 2009-07-22 | 株式会社ミツバ | Automotive power circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2544847C2 (en) * | 2009-07-13 | 2015-03-20 | Дженерак Пауэр Системс, Инк. | Control method for fixed-frequency generator with variable engine speed |
| CN102780256A (en) * | 2012-07-27 | 2012-11-14 | 浙江吉利汽车研究院有限公司杭州分公司 | Charge control system for vehicle storage battery |
| CN102780256B (en) * | 2012-07-27 | 2015-11-25 | 浙江吉利汽车研究院有限公司杭州分公司 | A kind of charge control system of vehicle battery |
| CN109001626A (en) * | 2017-05-22 | 2018-12-14 | 英飞凌科技股份有限公司 | Improved troubleshooting for alternating current generator control apparatus |
| CN109001626B (en) * | 2017-05-22 | 2022-04-08 | 英飞凌科技股份有限公司 | Improved fault handling for alternator control devices |
| WO2019015624A1 (en) * | 2017-07-19 | 2019-01-24 | Huawei Technologies Co., Ltd. | Three-level voltage bus apparatus and method |
| CN110771026A (en) * | 2017-07-19 | 2020-02-07 | 华为技术有限公司 | Three-level voltage bus apparatus and method |
| CN109665470A (en) * | 2018-12-29 | 2019-04-23 | 徐州海伦哲特种车辆有限公司 | A kind of electronic high-altitude operation vehicle energy-saving control system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4867922B2 (en) | 2012-02-01 |
| JP2009033950A (en) | 2009-02-12 |
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