CN104541432A - Power system for a vehicle - Google Patents
Power system for a vehicle Download PDFInfo
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- CN104541432A CN104541432A CN201380041653.8A CN201380041653A CN104541432A CN 104541432 A CN104541432 A CN 104541432A CN 201380041653 A CN201380041653 A CN 201380041653A CN 104541432 A CN104541432 A CN 104541432A
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- Prior art keywords
- lower limit
- engine
- electric power
- speed
- battery
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1446—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle in response to parameters of a vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
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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
Abstract
A power system for a vehicle is provided, in which idle reduction control is performed, under which an engine is automatically stopped when a predetermined automatic stop condition is met, and automatically restarted when a predetermined restart condition is met in a state where the engine is automatically stopped. The power system includes a generator which is driven on the basis of output of the engine, a battery which is connected to the generator, and a controller which allows the generator to generate power when an amount of charge of the battery has decreased below a lower limit, and which sets the lower limit to a higher level when the speed of the vehicle has exceeded a predetermined speed than in a case where a speed of the vehicle has not exceeded the predetermined speed.
Description
Technical field
The present invention relates to a kind of electric power system for vehicle, this electric power system comprises generator and battery.
Background technology
The known electric power system be arranged in vehicle is configured by use two batteries (i.e. lead accumulator and lithium ion battery).By suitably using these batteries, supply power to the various electric loadings be arranged in vehicle.Such as patent documentation JP-A-2012-080706 discloses the concrete configuration of such electric power system, and wherein, lithium ion battery is electrically connected to generator and lead accumulator via semiconductor switch.
Disclosed in JP-A-2012-080706, configuration achieves idle running minimizing and controls (idle reducecontrol).Under idle running reduces and controls, automatically stop engine when meeting predetermined automatic stop condition, and made a reservation for automatically restart engine when restarting condition when meeting under the state that automatically stops at this engine.
Usually, when the quantity of electric charge of lead accumulator reduces to below lower limit or lower limit, electrical power generators is to charge to lead accumulator.Thus, if reduced to below lower limit or lower limit at engine by the quantity of electric charge of lead accumulator under the state that automatically stops, then engine is restarted for the object of charging to lead accumulator.In this case, shorten the duration of engine halted state, thus effectively can not carry out idle running and reduce control.
Summary of the invention
Embodiment provides a kind of electric power system for vehicle, and this electric power system effectively can be carried out idle running and reduce control.
As the one side of embodiment, provide a kind of electric power system for vehicle, in this electric power system, carry out idle running reduce control, under idle running reduces control, automatically engine is stopped when meeting predetermined automatic stop condition, and when met under the state that automatically stops at engine predetermined restart condition time, automatically restart engine.This electric power system comprises: generator, and this generator is driven based on the output of engine; Battery, this battery is connected to generator; And controller, this controller makes generator generate electricity when the quantity of electric charge of battery reduces to below lower limit, and the lower limit set when the speed of vehicle exceedes predetermined speed is become lower limit for height when not exceeding predetermined speed than the speed of vehicle by this controller.
Embodiment
Hereinafter with reference to accompanying drawing, some embodiments of the present invention are described.
(the first embodiment)
First embodiment of the electric power system for vehicle of the present invention is described referring to figs. 1 through Fig. 4.The electric power system of the present embodiment is mounted in electric power system in the car that uses in vehicle.Vehicle uses engine (internal combustion engine) to travel as drive source.When starting engine, drive starter motor that engine is initially rotated.
Fig. 1 shows the schematic diagram of the electric power system according to the first embodiment.As shown in fig. 1, electric power system comprises: alternating current generator 10, lead accumulator 20, lithium ion battery 30, electric loading 41,42 and 43, MOS switch 50 and SMR switch 60.Lead accumulator 20, lithium ion battery 30 and electric loading 41,42 and 43 is electrically connected with alternating current generator 10 (generator) parallel connection via power feeder 15 (stube cable).Power feeder 15 forms feed path, makes electric power be fed to each electric parts from alternating current generator 10.
Lead accumulator 20 (battery, the first battery) is known universal battery.Lithium ion battery 30 (the second battery) is the high density battery in charge/discharge with energy-efficient, high power density and high-energy-density compared with lead accumulator 20.The battery pack that lithium ion battery 30 is connected by multiple battery cells in series configures.The charging capacity of lead accumulator 20 is configured to larger than the charging capacity of lithium ion battery 30.
MOS switch 50 (connecting valve) is the semiconductor switch configured by MOSFET (mos field effect transistor).MOS switch 50 is arranged in the position between alternating current generator 10 and lithium ion battery 30.This position also corresponds to the position between lead accumulator 20 and lithium ion battery 30.MOS switch 50 act as following switch: lithium ion battery 30 is connected (connection) to alternating current generator 10 and lead accumulator 20 by this switch, and is disconnected (shutoff) from alternating current generator 10 and lead accumulator 20 by lithium ion battery 30.
ON/OFF MOS switch 50 is carried out by ECU (electronic control unit) 70.Particularly, conducting state (connection status) and the off state (off-state) of MOS switch 50 is switched by ECU 70.ECU 70 is configured to the known microcomputer comprising CPU and memory (ROM and RAM).
Being similar to MOS switch 50, SMR switch 60 (cell switch) is the semiconductor switch configured by MOSFET.In power feeder 15, SMR switch 60 is arranged in the position between coupling part and lithium ion battery 30, and this coupling part is connected between MOS switch 50 and electric loading 43.SMR switch 60 act as following switch: lithium ion battery 30 is connected to MOS switch 50 and electric loading 43 by this switch, and is disconnected from MOS switch 50 and electric loading 43 by lithium ion battery 30.
Conducting state (connection status) and the off state (off-state) of SMR switch 60 is switched by ECU 70.During emergency, SMR switch 60 also act as opening/closing apparatus.Usually, according to the continuous output of the Continuity signal from ECU 70, SMR switch 60 remains in conducting state.During emergency, stop exporting Continuity signal and enter off state to make SMR switch 60.By making SMR switch 60 enter off state, avoid the overcharge to lithium ion battery 30 or overdischarge.SMR switch 60 can be configured by open type electromagnetic relay.In this case, even if ECU70 breaks down and can not also automatically be opened to set up disconnection by control SMR switch 60, SMR switch 60.
Lithium ion battery 30, switch 50 and 60 and ECU 70 are contained in for configuring battery component U in integrated housing (storage case).Lithium ion battery 30 is provided with current sensor, voltage sensor and temperature sensor.Current sensor measurement flows out or flows into the electric current of lithium ion battery 30.The terminal voltage of voltage sensor senses lithium ion battery 30.Temperature sensor detects the temperature of lithium ion battery 30.Based on the output of these transducers, ECU70 detects the output current of lithium ion battery 30, output voltage and temperature.
ECU 70 is connected to the ECU (electronic control unit) 80 of battery component U outside.ECU 80 is connected with the vehicle speed sensor 91 detecting car speed.ECU 70 is connected to each other to realize mutual communication via the such as communication network of CAN (controller local area network) with 80.Therefore, the various data be stored in ECU 70 and 80 can be shared between these ECU.ECU 80 (controller) is configured to the known microcomputer comprising CPU and memory (ROM and RAM).
In electric loading 41,42 and 43, electric loading 43 sets up electrical connection relative to MOS switch 50 in lithium ion battery 30 side.Electric loading 43 is electric loadings of requirement constant voltage, and it requires that the voltage of the electric power of supply is stable, and that is, the change in voltage of the voltage substantially constant of the electric power of supply or the electric power of supply drops in preset range.Supply of electric power to electric loading 43 is responsible for primarily of lithium ion battery 30.
The concrete example of electric loading 43 comprises navigation system and audio system.Such as, if the voltage of electric power of supply is non-constant and be changed significantly, or is changed significantly thus exceedes preset range, then some may be caused to bother.Such as, voltage may be reduced to below minimum operation voltage instantaneously and reset the operation of such as navigation system.Therefore, the specified level that the electrical power stabilization being supplied to electric loading 43 can not make voltage be reduced to below minimum operation voltage is required.
In electric loading 41,42 and 43, electric loading 41 and 42 sets up electrical connection relative to MOS switch 50 in lead accumulator 20 side.Electric loading 41 is the starter motors starting engine, and electric loading 42 is the conventional electric loadings except electric loading 43 (requiring the electric loading of constant voltage) and starter 41.The concrete example of electric loading 42 comprises: the heater of headlight, the rain brush for such as front windshield, the fan for air conditioner and the frost removal for rear seat windscreen.Electric loading 42 comprises driving load, and this driving load drives power steering gear or motorized window when its predetermined drive condition meets.Supply of electric power to starter 41 and electric loading 42 is responsible for primarily of lead accumulator 20.
Alternating current generator 10 uses the rotating energy of the bent axle of engine (output shaft) to generate electricity.Although omit the configuration etc. that known alternating current generator 10 is shown, brief description is carried out to it.When rotor by crankshaft rotating alternating current generator 10, exciting current, by rotor coil, in response to this, can induce AC electric current in the stator coils.Then by rectifier, AC current conversion is become DC electric current.Adjust the exciting current by rotor coil by the adjuster of alternating current generator 10, thus the voltage adjusting generated DC electric current makes it be the voltage Vreg set.The operation of adjuster is controlled by ECU 80.
The electric power that alternating current generator 10 generates is provided to electric loading 41,42 and 43, is also provided to lead accumulator 20 and lithium ion battery 30 simultaneously.When to the driving stopping of engine and alternating current generator 10 does not generate electricity time, electric power is supplied to electric loading 41,42 and 43 from lead accumulator 20 and lithium ion battery 30.
In addition, in the present embodiment, carry out deceleration regeneration, wherein the regenerated energy of vehicle is used for alternating current generator 10 is generated electricity thus charges to both batteries 20 and 30.Carry out deceleration regeneration when some conditions meet, some conditions comprise: vehicle is in deceleration, it is cut-off etc. to inject to the fuel of engine.
Battery 20 and 30 is connected in parallel.Therefore, when with alternating current generator 10 pairs of battery chargings, if MOS switch 50 is in conducting state, then the electric current encouraged of alternating current generator 10 flows into its terminal voltage lower than in the battery of another battery.On the other hand, when supplying (electric discharge) electric power to electric loading 42 and 43, if MOS switch 50 is in conducting state in the non-power generating time period, then from its terminal voltage higher than the battery discharge of another battery to electric loading.
When carrying out refresh charging, guaranteeing that the terminal voltage of lithium ion battery 30 has the chance of below the terminal voltage being more reduced to lead accumulator 20, making lithium ion battery 30 have precedence over lead accumulator 20 and being charged.Such setting can be realized by the open circuit voltage and internal resistance determining battery 20 and 30.Open circuit voltage can be determined by selecting the positive electrode active materials of lithium ion battery 30, negative active core-shell material and electrolyte.
In the vehicle of the present embodiment, carrying out idle running and reduce and control, under idle running reduces and controls, automatically stopping engine when meeting predetermined automatic stop condition, and when met under the state that automatically stops at engine make a reservation for restart condition time, automatically restart engine.When under controlling in minimizing of dallying, engine is automatically stopped, ECU 70 turns off (disconnection) MOS switch 50.In addition, when engine is restarted, at lead accumulator 20 from the state that lithium ion battery 30 electricity disconnects, ECU 70 turns off (disconnection) MOS switch 50, makes by lead accumulator 20 to drive starter (electric loading 41).
When vehicle travelled in the time period except the time period of refresh charging, ECU 70 turns off MOS switch 50 and connects SMR switch 60.Alternating current generator 10 and lead accumulator 20 disconnect from electric loading 43 electricity, and lithium ion battery 30 is electrically connected to electric loading 43 simultaneously.Therefore, lithium ion battery 30 supplies electric power to individually electric loading 43.Thus, during regenerative electric power, guarantee that the terminal voltage of lithium ion battery 30 has the chance of below the terminal voltage being more reduced to lead accumulator 20, make it possible to energetically by generated power charge to lithium ion battery 30.Compared with lead accumulator 20, lithium ion battery 30 has higher energy efficiency, thus enhances the charge/discharge efficiency of whole electric power system.
Lead accumulator 20 is provided with current sensor and voltage sensor.Current sensor detects the electric current flowing out or flow into lead accumulator 20.The terminal voltage of voltage sensor senses lead accumulator 20.The detected value obtained from these transducers is transferred into ECU 80 (cell system control unit).As described above, ECU 70 detects output current and the output voltage of lithium ion battery 30 based on the output of the transducer be arranged in lithium ion battery 30.The various data of ECU 70 and 80 are shared between these ECU.
ECU 80 calculates each SOC (state of charge: the actual quantity of electric charge is relative to the percentage (%) of the quantity of electric charge be full of in electricity condition) in lead accumulator 20 and lithium ion battery 30 based on the detected value obtained from above mentioned current sensor and voltage sensor.ECU 80 controls the generating of alternating current generator 10, each SOC in lead accumulator 20 and lithium ion battery 30 will be dropped in proper range and (make battery not by overcharge or overdischarge).Particularly, adjusted the voltage Vreg of setting by ECU 80, simultaneously by the operation of ECU 70 control MOS switch 50.Hereinafter, the SOC of lead accumulator 20 is called PbSOC, and the SOC of lithium ion battery 30 is called LiSOC.The proper range of LiSOC is about 35% to 80%, and the proper range of PbSOC is about 88% to 92%.In the present embodiment, as shown in Figure 2, the proper range (lower limit is to the upper limit) of PbSOC is set subtly according to some conditions.
As shown in Figure 2, when car speed exceedes predetermined speed (condition 1), the lower limit D1 of PbSOC is set as 89.8% and upper limit U1 is set as 90.2%.When car speed does not exceed predetermined speed (condition 2), the lower limit D2 of PbSOC is set as 89.2% and upper limit U2 is set as 89.6%.In other words, when car speed exceedes predetermined speed, the lower limit set of PbSOC is become high when not exceeding predetermined speed than car speed.In addition, the lower limit D1 of the PbSOC of condition 1 is set to that the upper limit U2 of the PbSOC than condition 2 is high.The lower limit D1 of the PbSOC of condition 1 is become equal with the scope between upper limit U2 with the lower limit D2 of the PbSOC of condition 2 with the range set between upper limit U1.Such as, predetermined speed can be 50km/h, namely for determining that vehicle probably keeps the speed travelled, or in other words, for determining the speed that possibility that engine is automatically stopped is little.
Whether meet regardless of condition 1 or condition 2, when the electric current discharged from lead accumulator 20 exceedes scheduled current (condition 3), the lower limit D3 of PbSOC is set as 90.5%, upper limit U3 is set as 91.0% simultaneously.In addition, the lower limit D3 of the PbSOC of condition 3 is set to higher than the upper limit U2 of the upper limit U1 of the PbSOC of condition 1 or the PbSOC of condition 2.In other words, when the electric current discharged from lead accumulator 20 exceedes scheduled current, high the lower limit set of PbSOC being become ratio not exceed scheduled current from the electric current that lead accumulator 20 discharges.The lower limit D3 of the PbSOC of condition 3 and the range set between upper limit U3 are become to be greater than when do not satisfy condition 3 the lower limit of PbSOC and the upper limit between scope.In addition, the lower limit D3 of the PbSOC of condition 3 is become the scope between the lower limit D1 (D2) of the PbSOC of greater than condition 1 (2) and upper limit U1 (U2) with the range set between upper limit U3.Scheduled current is set to for determining that the quantity of electric charge of lead accumulator 20 reduces electric current faster.
With reference to Fig. 3, the control treatment (quantity of electric charge retentive control) being used for keeping the quantity of electric charge of lead accumulator 20 based on the upper and lower bound of PbSOC is described hereinafter.This process comprises the series of steps repeated with predetermined period by ECU 80.
First, determine whether the electric current discharged from lead accumulator 20 exceedes scheduled current (step S11).Particularly, whether the detected value that ECU 80 obtains based on the current sensor from lead accumulator 20, exceed scheduled current from the electric current of lead accumulator 20 electric discharge under determining the state do not generated electricity at alternating current generator 10.If determine that the electric current discharged from lead accumulator 20 exceedes scheduled current (being yes step S11), then the upper and lower bound of PbSOC is set as upper limit U3 and the lower limit D3 of condition 3.
On the other hand, if determine that the electric current discharged from lead accumulator 20 does not exceed scheduled current (being no step S11), then determine whether car speed exceedes predetermined speed (step S13).Particularly, based on the detected value obtained from vehicle speed sensor 91, ECU 80 determines whether car speed exceedes predetermined speed.Predetermined speed is set to (being in acceleration) is higher than (being in deceleration) when reducing at car speed when car speed increases, thus suppresses delayed.
If determine that car speed exceedes predetermined speed (step S13 place is yes), then determine whether time period T2 expires (step S14) after car speed exceedes predetermined speed.Time period T2 (the second time period) is set to determine that car speed is reduced to the little value of the possibility of below predetermined speed again.If determine that time period T2 expires (step S14 is yes) after car speed exceedes predetermined speed, be then set to upper limit U1 and the lower limit D1 (step S15) of condition 1 by the upper and lower bound of PbSOC.Particularly, when car speed exceedes predetermined speed, if time period T2 expires after car speed exceedes predetermined speed, then the lower limit set of PbSOC is become than high when car speed does not exceed predetermined speed.
On the other hand, in step S14, if determine that time period T2 does not expire (being no in step S14) after car speed exceedes predetermined speed, then remain current set value by the upper and lower bound of PbSOC.It should be understood that before this series of steps starts, the upper and lower bound of PbSOC is initially set to upper limit U1 and the lower limit D1 of condition 1.
If determine that car speed does not exceed predetermined speed (being no in step S13), then determine whether time period T3 expires (step S16) after car speed is reduced to below predetermined speed.Time period T3 (the 3rd time period) is set to determine that car speed exceedes the little value of the possibility of predetermined speed again.If determine that time period T3 expires (being yes in step S16) after car speed is reduced to below predetermined speed, be then set as upper limit U2 and the lower limit D2 (step S17) of condition 2 by the upper and lower bound of PbSOC.Particularly, when car speed does not exceed predetermined speed, if time period T3 expires after car speed is reduced to below predetermined speed, then the situation than exceeding predetermined speed at car speed the lower limit set of PbSOC is become to bend down.
Then, after the value (step S12, S15 or the S17) upper and lower bound of PbSOC being set to one of condition 1,2 and 3, ECU 80 controls the generating of alternating current generator 10 based on set upper and lower bound, and PbSOC is dropped in proper range.Particularly, ECU 80 makes alternating current generator 10 generate electricity when the quantity of electric charge of lead accumulator 20 reduces to below lower limit, but stops the generating of alternating current generator 10 when the quantity of electric charge of lead accumulator 20 is increased to more than the upper limit.Afterwards, the series of steps (end) of this process is stopped.
With reference to Fig. 4, the effect of the quantity of electric charge retentive control shown in Fig. 3 is described hereinafter.Fig. 4 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC.In the diagram, the proper range of PbSOC is shown with the hacures between the upper limit of PbSOC and lower limit.
As shown in Figure 4, initially (be in acceleration) higher than under the state of predetermined speed at car speed, the upper and lower bound of PbSOC be set to upper limit U1 and the lower limit D1 of condition 1.Reduce when car speed and when moment t11 place is reduced to below predetermined speed (being in deceleration), the upper and lower bound of PbSOC will remain upper limit U1 and lower limit D1.Then, when (being in deceleration) time period T3 (from moment t11) expires at moment t12 place after being reduced to below predetermined speed at car speed, the upper and lower bound of PbSOC is set to upper limit U2 and the lower limit D2 of condition 2.By this way, when car speed probably exceedes predetermined speed again (being in acceleration), the upper and lower bound of PbSOC is remained upper limit U1 and the lower limit D1 of condition 1.Then, become probably by the time point place automatically stopped at engine, the upper and lower bound of PbSOC is set to upper limit U2 and the lower limit D2 of condition 2.
Afterwards, even if to increase and when exceeding predetermined speed at moment t13 place (being in acceleration) at car speed, the upper and lower bound of PbSOC upper limit U2 and the lower limit D2 of condition 2 will be remained.Then, when the time period T2 (from moment t13) that (is in acceleration) after exceeding predetermined speed at car speed expires at moment t14 place, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 1.By this way, (be in deceleration) when car speed is probably reduced to below predetermined speed again, the upper and lower bound of PbSOC remained upper limit U2 and the lower limit D2 of condition 2.Then, become the time point place probably keeping travelling at car speed, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 1.
The embodiment described in detail above has the following advantages.
When car speed exceedes predetermined speed (condition 1), the lower limit set of PbSOC become (condition 2) when not exceeding predetermined speed than car speed high.Therefore, when car speed exceedes predetermined speed and vehicle probably keeps travelling, guarantee that, compared with when car speed does not exceed predetermined speed, lead accumulator 20 has the more quantity of electric charge.On the contrary, when car speed does not exceed predetermined speed and engine is probably automatically stopped, when the quantity of electric charge of lead accumulator 20 become lower than the quantity of electric charge when car speed exceedes predetermined speed before do not carry out the generating of alternating current generator 10.Thus, when vehicle probably keeps travelling, guarantee that the quantity of electric charge is comparatively large, but when engine is probably automatically stopped, allowing more to discharge.Therefore, effectively can carry out idle running and reduce control.
When car speed exceed predetermined speed (condition 1) but when the time period T2 that (is in acceleration) after car speed exceedes predetermined speed does not expire, forbid the lower limit set of PbSOC to become than when car speed does not exceed predetermined speed (condition 2) high.Therefore, the time period T2 that (is in acceleration) after exceeding predetermined speed at car speed does not expire and car speed is probably reduced to below predetermined speed again time (being in deceleration), suppress the generating of alternating current generator 10.Then, when car speed exceedes predetermined speed and the time period T2 (the second time period) that (is in acceleration) after car speed exceedes predetermined speed expires, the lower limit set of PbSOC is become than high condition 2 times.Thus, when vehicle probably keeps travelling, guarantee that lead accumulator 20 has the higher quantity of electric charge.Therefore, more effectively can carry out idle running and reduce control.
When not exceeding predetermined speed (condition 2) when car speed but be reduced at car speed that time period T3 does not expire after below predetermined speed (being in deceleration), forbid the lower limit set of PbSOC to become than when car speed exceedes predetermined speed (condition 1) low.Therefore, the time period T3 that (is in deceleration) after car speed is reduced to below predetermined speed does not expire and car speed probably exceedes predetermined speed again time (being in acceleration), guarantee that lead accumulator 20 has the higher quantity of electric charge.Then, when car speed does not exceed predetermined speed but (is in deceleration) after car speed is reduced to predetermined speed the time period, T3 expired, the lower limit set of PbSOC is become than bending down in condition 1.Thus, when engine is probably automatically stopped, the generating of alternating current generator 10 can be suppressed.Therefore, more effectively can carry out idle running and reduce control.
When not carrying out generating electricity when alternating current generator 10 and exceed scheduled current from the electric current of lead accumulator 20 electric discharge (condition 3), the lower limit D3 of PbSOC is set to than high when the electric current discharged from lead accumulator 20 does not exceed scheduled current.Thus, when the quantity of electric charge of lead accumulator 20 reduces rapidly, guarantee that lead accumulator 20 has the higher quantity of electric charge.
When the electric current discharged from lead accumulator 20 exceedes scheduled current (condition 3), the lower limit D3 of PbSOC is set to higher than the lower limit D1 of the PbSOC of (condition 1) when car speed exceedes predetermined speed.Thus, when the quantity of electric charge of lead accumulator 20 promptly reduces, guarantee that the quantity of electric charge is greater than the quantity of electric charge when vehicle probably keeps traveling.Therefore, when engine is probably automatically stopped, the generating of alternating current generator 10 can be suppressed.Therefore, more effectively can carry out idle running and reduce control.
When the electric current discharged from lead accumulator 20 exceedes scheduled current (condition 3), lower limit D3 is become larger than the scope between the lower limit when the electric current discharged from lead accumulator 20 does not exceed scheduled current and the upper limit with the range set between upper limit U3.Thus, when the quantity of electric charge of lead accumulator 20 promptly reduces and reduces to below lower limit D3, guarantee that the recruitment of the quantity of electric charge is larger.Thus, prevent the quantity of electric charge of lead accumulator 20 from again reducing to below lower limit D3 immediately.
Predetermined speed is set to when car speed increases (being in acceleration) than high when car speed reduces (being in deceleration).Thus, even if the upper and lower bound of PbSOC also can be prevented to be expected to change frequently when changes in vehicle speed.
Electric power system comprises lithium ion battery 30, and this lithium ion battery 30 is connected to alternating current generator 10 and lead accumulator 20.Therefore, electric current is discharged to lithium ion battery 30 from lead accumulator 20, makes PbSOC easily reduce to below lower limit.Thus, probably keep guaranteeing the large quantity of electric charge when travelling at vehicle, but when engine is probably automatically stopped, suppressing the generating of alternating current generator 10.By this way, very large advantage can be obtained with such configuration.
(the second embodiment)
Referring now to Fig. 5 to Fig. 7, hereinafter the second embodiment of the present invention is described.In a second embodiment, shown in figure 3 quantity of electric charge retentive control is changed to the quantity of electric charge retentive control shown in Fig. 6.All the other configurations are similar to the first embodiment.It should be understood that, in a second embodiment and in the modified example after this described, in order to omit unnecessary explanation, identical Reference numeral is provided to the parts of the same or similar control treatment of parts or step with the control treatment in the first embodiment or step.
Fig. 5 shows the table of the upper and lower bound of the PbSOC for some conditions according to the second embodiment.As shown in Figure 5, in a second embodiment, the proper range of PbSOC is set subtly according to some conditions.As shown in Figure 5, under engine state at work (condition 4), the upper and lower bound of PbSOC is set to the upper limit U1 similar with the upper and lower bound of the PbSOC of condition 1 and lower limit D1.At engine by (condition 5) under the state that automatically stops, the upper and lower bound of PbSOC is set to the upper limit U2 similar with the upper and lower bound of the PbSOC of condition 2 and lower limit D2.Particularly, at engine by under the state that automatically stops, the lower limit set of PbSOC is become than bending down in engine state at work.
No matter whether condition 4 or 5 meets, and when the electric current discharged from lead accumulator 20 exceedes scheduled current (condition 3), the upper and lower bound of PbSOC is set to the upper limit U3 similar with the upper and lower bound of the PbSOC of condition 3 recited above and lower limit D3.Upper limit U1 is identical with the relation in the first embodiment respectively with the relation between lower limit D2 and upper limit U3 and lower limit D3 with lower limit D1, upper limit U2.
With reference to the flow chart shown in Fig. 6, the control treatment (quantity of electric charge retentive control) being used for keeping the quantity of electric charge of lead accumulator 20 based on the upper and lower bound of PbSOC is described hereinafter.This process comprises the series of steps repeated with predetermined period by ECU 80.
First, in step s 11, if determine that the electric current discharged from lead accumulator 20 does not exceed scheduled current (being no step S11), then engine whether at work (step S23) is determined.If determine engine (being yes in step S23) at work, then determine whether time period T1 (first time period) expires (step S24) after engine is automatically restarted.Time period T1 (first time period) is configured to determine that vehicle probably keeps the time period travelled.
In step s 24 which, if determine to expire (being yes step S24) from the autoboot time started section T1 of engine, then the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 (step S25) of condition 4.Particularly, under engine state at work, if expired from the autoboot time started section T1 of engine, the lower limit set of PbSOC is become than at engine by high under the state that automatically stops.
On the other hand, if determine that restarting time started section T1 from automatic engine does not expire (being no step S24), then remain current set value by the upper and lower bound of PbSOC in step s 24 which.It should be understood that before this series of steps starts, the upper and lower bound of PbSOC is initially set to upper limit U1 and the lower limit D1 of condition 4.
If determine that in step S23 engine is not at work, namely engine is in by (being no in step S23) under the state that automatically stops, then the upper and lower bound of PbSOC is set to upper limit U2 and the lower limit D2 (step S26) of condition 5.
The upper and lower bound of PbSOC is being set to after the upper and lower bound (step S12, S25 and S26) of condition 3,4 and 5 any PbSOC once, ECU 80 controls the generating of alternating current generator 10 based on set upper and lower bound, and PbSOC is dropped in proper range.Particularly, ECU 80 makes alternating current generator 10 generate electricity when the quantity of electric charge of lead accumulator 20 reduces to below lower limit, but stops the generating of alternating current generator 10 when the quantity of electric charge of lead accumulator 20 rises to more than the upper limit.Afterwards, the series of steps (end) of this process is stopped.
With reference to Fig. 7, the effect that the quantity of electric charge shown in Fig. 6 controls is described hereinafter.Fig. 7 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC.
As shown in Figure 7, under engine initially state at work, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 4.Reduce when car speed and when automatically being stopped at moment t21 place engine, the upper and lower bound of PbSOC be set to upper limit U2 and the lower limit D2 of condition 5.Therefore, before expiring from the autoboot time started section T1 of engine, the generating of alternating current generator 10 is not carried out until PbSOC reduces further.
Afterwards, even if when engine is automatically restarted at moment t22 place, the upper and lower bound of PbSOC upper limit U2 and the lower limit D2 of condition 5 will be remained.Then, when expiring from the autoboot time started section T1 of engine at moment t23, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 4.By this way, when engine is probably automatically stopped again, the upper and lower bound of PbSOC is remained upper limit U2 and the lower limit D2 of condition 5.Then, become the time point place probably keeping travelling at vehicle, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 4.
Specifically described second embodiment has advantage as described below.Eliminate the advantage similar with the advantage in the first embodiment.
At engine by (condition 5) under the state that automatically stops, the lower limit set of PbSOC is become lower than (condition 4) under engine state at work.Therefore, before expiring from the autoboot time started section T1 of engine, do not carry out the generating of alternating current generator 10 until the quantity of electric charge of lead accumulator 20 becomes bends down than in engine state at work.Thus, at engine in fact by under the state that automatically stops, more electric discharge can be allowed.Therefore, more effectively can carry out idle running and reduce control.
When time period T1's engine does not expire at work but after the autoboot of engine, forbid the lower limit set of PbSOC to become than high by (condition 5) under the state that automatically stops at engine.Therefore, when the autoboot time started section T1 from engine does not expire and engine is probably automatically stopped again, allow more to discharge.When engine at work (condition 4) and from engine the autoboot time started, section T1 expired time, the lower limit set of PbSOC is become than high condition 5 times.Thus, when vehicle probably keeps travelling, guarantee that battery has the more quantity of electric charge.Therefore, more effectively can carry out idle running and reduce control.
The lower limit D3 of the PbSOC of (condition 3) when the electric current discharged from lead accumulator 20 exceedes scheduled current is set to higher than the lower limit D1 of the PbSOC of (condition 4) under engine state at work.Therefore, when the quantity of electric charge of lead accumulator 20 promptly reduces, guarantee than the quantity of electric charge more under engine state at work, but when engine is probably automatically stopped, the generating of suppression alternating current generator 10.Therefore, more effectively can carry out idle running and reduce control.
It should be understood that the present invention is not limited to configuration recited above, and should think that any and whole amendment that those skilled in the art can make, modification or equivalent fall into scope of the present invention.
(modified example)
Such as, above-described embodiment can be revised as described below.
In a first embodiment, the lower limit D3 of the PbSOC of (condition 3) when the electric current discharged from lead accumulator 20 exceedes scheduled current is set to higher than the lower limit D1 of the PbSOC of (condition 1) when exceeding predetermined speed at car speed.As the replacement to this, the lower limit D3 of the PbSOC under condition 3 can be set to equal with the lower limit D1 of the PbSOC of condition 1.Alternatively, the lower limit D3 of the PbSOC of condition 3 can be set to that the lower limit D1 of the PbSOC than condition 1 is low.
In a second embodiment, the lower limit D3 of the PbSOC of (condition 3) when the electric current discharged from lead accumulator 20 exceedes scheduled current is set to higher than the lower limit D1 of the PbSOC of (condition 4) under engine state at work.As the replacement to this, the lower limit D3 of the PbSOC of condition 3 can be set to equal with the lower limit D1 of the PbSOC of condition 4.Alternatively, the lower limit D3 of the PbSOC of condition 3 can be set to that the lower limit D1 of the PbSOC than condition 4 is low.
The lower limit larger than the lower limit D2 of the PbSOC of condition 2 can be used as the replacement of the lower limit of PbSOC.
In a first embodiment, when car speed increases (being in acceleration), predetermined speed is set to than (being in deceleration) height when car speed reduces.As the replacement to this, predetermined speed can be set to be in accelerate be in both decelerations identical.
In this case, as shown in Figure 8, at car speed initially higher than under the state of predetermined speed, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 1.Even if when being reduced to below predetermined speed at moment t31 place car speed, the upper and lower bound of PbSOC upper limit U1 and lower limit D1 will be remained.Then, when time period T3 expires at moment t32 place after be reduced to below predetermined speed at car speed, the upper and lower bound of PbSOC is set to upper limit U2 and the lower limit D2 of condition 2.Therefore, when car speed probably exceedes predetermined speed again, the upper and lower bound of PbSOC is maintained upper limit U1 and the lower limit D1 of condition 1.Then, become probably by the time point place automatically stopped at engine, the upper and lower bound of PbSOC is set to upper limit U2 and the lower limit D2 of condition 2.
Afterwards, even if to increase thus when exceeding predetermined speed at moment t33 place at car speed, the upper and lower bound of PbSOC upper limit U2 and the lower limit D2 of condition 2 will be remained.Then, when exceeding predetermined speed from car speed, time started section T2 is when moment t34 expires, and the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 1.Therefore, when car speed is probably reduced to below predetermined speed again, the upper and lower bound of PbSOC is remained upper limit U2 and the lower limit D2 of condition 2.Then, become the time point place probably keeping travelling at car speed, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 1.
According to this configuration, do not need the predetermined speed being in acceleration to change when being in deceleration, or do not need the predetermined speed being in deceleration to change when being in acceleration, thus simplify the process undertaken by ECU 80.And, in this case, under the condition that time period T3 expires or time period T2 expires after car speed exceedes predetermined speed after car speed is reduced to below predetermined speed, change the upper and lower bound of PbSOC.Thus the change of car speed causes the frequent change of the upper and lower bound of PbSOC hardly.
In addition, the upper and lower bound of PbSOC can be changed when the condition that not demand fulfillment time period T3 or T2 expires.In this case, as shown in Figure 9, at car speed initially higher than under the state of predetermined speed, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 1.Reduce when car speed thus when being reduced to below predetermined speed at moment t41 place, the upper and lower bound of PbSOC be set to upper limit U2 and the lower limit D2 of condition 2.Afterwards, increase when car speed thus when exceeding predetermined speed at moment t42 place, the upper and lower bound of PbSOC be set to upper limit U1 and the lower limit D1 of condition 1.And, in this case, when vehicle probably keeps travelling, ensure that lead accumulator 20 has the higher quantity of electric charge, and when engine is probably automatically stopped, inhibit the generating of alternating current generator 10 (generator).
In a second embodiment, when engine is not at work and when expiring from the autoboot time started section T1 of engine, forbid the lower limit set of PbSOC to become higher by (condition 5) under the state that automatically stops than engine.As the replacement to this, the upper and lower bound of PbSOC can be changed when the condition that not demand fulfillment time period T1 expires.
In this case, as shown in Figure 10, under engine initially state at work, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 4.Reduce when car speed and when automatically being stopped at moment t51 place engine, the upper and lower bound of PbSOC be set to upper limit U2 and the lower limit D2 of condition 5.Afterwards, when automatically being restarted at moment t52 place engine, the upper and lower bound of PbSOC is set to upper limit U1 and the lower limit D1 of condition 4.And, in this case, at engine in fact by under the state that automatically stops, the generating of alternating current generator 10 can be suppressed.
In above-described embodiment, make the upper and lower bound of the PbSOC of condition 1 equal with the upper and lower bound of the PbSOC of condition 4.As the replacement to this, the upper limit U1 of the PbSOC of condition 1 can be different with lower limit D4 from the upper limit U4 of the PbSOC of condition 4 with lower limit D1.In addition, in the above embodiments, make the upper and lower bound of the PbSOC of condition 2 equal with the upper and lower bound of the PbSOC of condition 5.As the replacement to this, the upper limit U2 of the PbSOC of condition 2 can be different with lower limit D5 from the upper limit U5 of the PbSOC of condition 5 with lower limit D2.
Can combine the first embodiment and the second embodiment.Particularly, the process comprising the step S13 to S18 shown in Fig. 3 can be performed and comprise the process of the step S23 to S26 shown in Fig. 6.Especially, became before zero at car speed and automatically stop the vehicle of engine can obtain the advantage of both the first embodiment and the second embodiment.
In the first embodiment and the second embodiment, electric power system comprises lead accumulator 20 and lithium ion battery 30.As the replacement to this, as shown in Figure 11, the electric power system not comprising lithium ion battery 30 can be used.And, use this configuration, alternating current generator 10 can be allowed to generate electricity when the quantity of electric charge of lead accumulator 20 reduces to below lower limit.In addition, in the configuration, when car speed exceedes predetermined speed, the lower limit set of PbSOC can be become than high when car speed does not exceed predetermined speed.In addition, at engine by under the state that automatically stops, the lower limit set of PbSOC can be become bend down than engine state at work.Therefore, effectively can carry out idle running and reduce control.
Hereinafter, summarized in the aspect of above-described embodiment.
As the one side of embodiment, provide a kind of electric power system for vehicle, in this electric power system, carry out idle running reduce control, under idle running reduces control, automatically engine is stopped when meeting predetermined automatic stop condition, and when met under the state that automatically stops at engine predetermined restart condition time, automatically restart described engine.This electric power system comprises: generator (10), and this generator (10) is driven based on the output of engine; Battery (20), this battery (20) is connected to generator (10); And controller (80), this controller (80) makes generator generate electricity when the quantity of electric charge of battery reduces to below lower limit, and the lower limit set when the speed of vehicle exceedes predetermined speed becomes than the lower limit for height when the speed of vehicle does not exceed predetermined speed by this controller.
According to this configuration, automatically stop engine when meeting predetermined automatic stop condition, and when met under the state that automatically stops at engine make a reservation for restart condition time, automatically restart engine.In addition, when the quantity of electric charge of battery reduces to below lower limit, generator generates electricity based on the output of engine, thus to being connected to the battery charging of generator.Thus, when engine by under the state that automatically stops, the quantity of electric charge of battery reduces to below lower limit time, restart engine to drive generator.
When car speed exceedes predetermined speed, the lower limit set of the quantity of electric charge is become than high when car speed does not exceed predetermined speed.Therefore, when car speed exceedes predetermined speed and vehicle probably keeps travelling, ensure that battery has than the quantity of electric charge higher when car speed does not exceed predetermined speed.On the other hand, when car speed does not exceed predetermined speed and engine is probably automatically stopped, before the quantity of electric charge of battery becomes the quantity of electric charge lower than the battery when car speed exceedes predetermined speed, alternating current generator does not generate electricity.Thus, when vehicle probably keeps travelling, ensure that the higher quantity of electric charge, and when engine is probably automatically stopped, inhibit the generating of generator.Therefore, effectively can carry out idle running and reduce control.
As the another aspect of embodiment, provide a kind of electric power system for vehicle, in this electric power system, carry out idle running reduce control, under idle running reduces control, automatically engine is stopped when meeting predetermined automatic stop condition, and when met under the state that automatically stops at engine predetermined restart condition time, automatically restart engine.This electric power system comprises: generator (10), and this generator (10) is driven based on the output of engine; Battery (20), this battery (20) is connected to generator (10); And controller (80), this controller (80) makes generator generate electricity when the quantity of electric charge of battery reduces to below lower limit, and at engine by under the state that automatically stops, lower limit set becomes to bend down than engine state at work by this controller.
According to this configuration, at engine by under the state that automatically stops, the lower limit set of the quantity of electric charge is become than bending down in engine state at work.Thus at engine by under the state that automatically stops, before the quantity of electric charge of battery becomes the quantity of electric charge lower than the battery under engine state at work, generator does not generate electricity.Therefore, at engine in fact by under the state that automatically stops, inhibit the generating of generator.Therefore, effectively can carry out idle running and reduce control.
Accompanying drawing explanation
In the accompanying drawings:
Fig. 1 shows the schematic diagram of the electric power system according to the first embodiment;
Fig. 2 shows the table of the upper and lower bound of the state of charge PbSOC of the lead accumulator for some conditions according to the first embodiment;
Fig. 3 shows the flow chart of the process of the quantity of electric charge retentive control according to the first embodiment;
Fig. 4 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to the first embodiment;
Fig. 5 shows the table of the upper and lower bound of the PbSOC for some conditions according to the second embodiment;
Fig. 6 shows the flow chart of the process of the quantity of electric charge retentive control according to the second embodiment;
Fig. 7 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to the second embodiment;
Fig. 8 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to modified example;
Fig. 9 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to another modified example;
Figure 10 shows the sequential chart according to the car speed of the upper and lower bound relative to PbSOC of a modified example again; And
Figure 11 shows the schematic diagram of the modified example of electric power system.
Claims (15)
1. the electric power system for vehicle, in described electric power system, carry out idle running reduce control, under described idle running reduces control, automatically engine is stopped when meeting predetermined automatic stop condition, and when met under the state that automatically stops at described engine predetermined restart condition time, automatically restart described engine, described electric power system comprises:
Generator, described generator is driven based on the output of described engine;
Battery, described battery is connected to described generator; And
Controller, described controller makes described generator generate electricity when the quantity of electric charge of described battery reduces to below lower limit, and the described lower limit set when the speed of described vehicle exceedes predetermined speed is become lower limit for height when not exceeding described predetermined speed than the speed of described vehicle by described controller.
2. electric power system according to claim 1, wherein,
At described engine by under the state that automatically stops, described lower limit set becomes than bending down in described engine state at work by described controller.
3. electric power system according to claim 2, wherein,
Under described engine state at work, if first time period is expired after described engine is to automatically restart, then described lower limit set becomes than high under the state be automatically stopped at described engine by described controller.
4. electric power system according to claim 1, wherein,
When the speed of described vehicle exceedes described predetermined speed, if the second time period expired after the speed of described vehicle exceedes described predetermined speed, then described lower limit set is become high when not exceeding described predetermined speed than the speed of described vehicle by described controller.
5. electric power system according to claim 1, wherein,
When the speed of described vehicle does not exceed described predetermined speed, if the 3rd time period expired after the speed of described vehicle is reduced to below described predetermined speed, then described lower limit set becomes the situation than exceeding described predetermined speed in the speed of described vehicle to bend down by described controller.
6. electric power system according to claim 1, wherein,
When not carrying out generating electricity at described generator and exceed scheduled current from the electric current of described battery discharge, described lower limit set becomes than high when not exceeding described scheduled current from the described electric current of described battery discharge by described controller.
7. electric power system according to claim 6, wherein,
The described lower limit set when exceeding described scheduled current from the described electric current of described battery discharge is configured to the described lower limit for height than setting when the speed of described vehicle exceedes described predetermined speed.
8. electric power system according to claim 6, wherein,
Described controller makes described generator generate electricity when the quantity of electric charge of described battery reduces to below lower limit, but stops the generating of described generator when the quantity of electric charge of described battery rises to more than the upper limit, and
When exceeding described scheduled current from the described electric current of described battery discharge, the scope between described lower limit and the described upper limit is configured to larger than the scope between the described lower limit when not exceeding described scheduled current from the described electric current of described battery discharge and the described upper limit.
9. electric power system according to claim 1, wherein,
Described predetermined speed is configured to when the speed of described vehicle increases than high when the speed of described vehicle reduces.
10. the electric power system for vehicle, in described electric power system, carry out idle running reduce control, under described idle running reduces control, automatically engine is stopped when meeting predetermined automatic stop condition, and when meet under the state be automatically stopped at described engine predetermined restart condition time, automatically restart described engine, described electric power system comprises:
Generator, described generator is driven based on the output of described engine;
Battery, described battery is connected to described generator; And
Controller, described controller makes described generator generate electricity when the quantity of electric charge of described battery reduces to below lower limit, and at described engine by under the state that automatically stops, described lower limit set becomes to bend down than described engine state at work by described controller.
11. electric power systems according to claim 10, wherein,
Under described engine state at work, if first time period is expired after described engine is to automatically restart, then described lower limit set becomes than high under the state be automatically stopped at described engine by described controller.
12. electric power systems according to claim 10, wherein,
When not carrying out generating electricity at described generator and exceed scheduled current from the electric current of described battery discharge, described lower limit set becomes than high when not exceeding described scheduled current from the described electric current of described battery discharge by described controller.
13. electric power systems according to claim 12, wherein,
The described lower limit set when the described electric current of described battery discharge exceedes described scheduled current is configured to the described lower limit for height than setting under described engine state at work.
14. electric power systems according to claim 12, wherein,
Described controller makes described generator generate electricity when the quantity of electric charge of described battery reduces to below described lower limit, but stops the generating of described generator when the quantity of electric charge of described battery rises to more than the upper limit, and
When exceeding described scheduled current from the described electric current of described battery discharge, the scope between described lower limit and the described upper limit is configured to larger than the scope between the described lower limit when not exceeding described scheduled current from the described electric current of described battery discharge and the described upper limit.
15. electric power systems according to claim 1, wherein,
Described battery is used as the first battery, and
Described electric power system also comprises the second battery being connected to described generator and described first battery.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-174781 | 2012-08-07 | ||
| JP2012174781A JP5965775B2 (en) | 2012-08-07 | 2012-08-07 | Vehicle power system |
| PCT/JP2013/071896 WO2014025064A1 (en) | 2012-08-07 | 2013-08-07 | Power system for a vehicle |
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| Publication Number | Publication Date |
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| CN104541432A true CN104541432A (en) | 2015-04-22 |
| CN104541432B CN104541432B (en) | 2017-05-03 |
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| CN201380041653.8A Active CN104541432B (en) | 2012-08-07 | 2013-08-07 | Power system for a vehicle |
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| JP (1) | JP5965775B2 (en) |
| CN (1) | CN104541432B (en) |
| DE (1) | DE112013003970T5 (en) |
| IN (1) | IN2015DN00144A (en) |
| WO (1) | WO2014025064A1 (en) |
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| CN108377009A (en) * | 2017-01-31 | 2018-08-07 | 丰田自动车株式会社 | Power supply system |
| JP2018182888A (en) * | 2017-04-12 | 2018-11-15 | 矢崎総業株式会社 | Power supply system |
| CN109630288A (en) * | 2018-11-23 | 2019-04-16 | 浙江吉利新能源商用车有限公司 | Electricity-generating method, the apparatus and system of dual fuel engine vehicle |
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| US9628011B2 (en) * | 2015-02-05 | 2017-04-18 | Ford Global Technologies, Llc | Engine speed control via alternator load shedding |
| JP6575402B2 (en) * | 2016-03-08 | 2019-09-18 | 株式会社オートネットワーク技術研究所 | In-vehicle power supply charge rate monitoring device and in-vehicle power supply system |
| JP6696401B2 (en) * | 2016-10-21 | 2020-05-20 | 株式会社デンソー | Power supply |
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- 2013-08-07 WO PCT/JP2013/071896 patent/WO2014025064A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
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| JP5965775B2 (en) | 2016-08-10 |
| DE112013003970T5 (en) | 2015-08-13 |
| CN104541432B (en) | 2017-05-03 |
| WO2014025064A1 (en) | 2014-02-13 |
| JP2014036458A (en) | 2014-02-24 |
| IN2015DN00144A (en) | 2015-06-12 |
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