CN106184191B

CN106184191B - Driving control system

Info

Publication number: CN106184191B
Application number: CN201610355662.XA
Authority: CN
Inventors: 饭野隼人
Original assignee: Suzuki Motor Corp
Current assignee: Suzuki Motor Corp
Priority date: 2015-05-29
Filing date: 2016-05-26
Publication date: 2018-10-19
Anticipated expiration: 2036-05-26
Also published as: JP2016222100A; DE102016209014A1; CN106184191A

Abstract

Offer will not damage fuel economy improvement effect and can properly manage the driving control system of the SOC of battery.Judge that torque calculation section (23) corresponds to the SOC calculatings of battery (11) according to the judgement torque for making motor torque of the engine 2 in the best operating point action of the thermal efficiency find out.Then, operation control part (24) is according to the request torque of driver and judges that the relationship of torque finds out target engine torque and target motor torque, and engine (2), and the action by the target motor direct torque motor (3) are controlled by the target engine torque.

Description

Driving control system

Technical field

The present invention relates to the action according to target engine torque control engine and according to target motor direct torque The driving control system of the action of motor.

Background technology

In the hybrid vehicle travelled using engine and motor, driving control system is to meet asking for driver It asks torque and determines target engine torque and target motor torque.

As existing this driving control system, it is known that following system：It is judged for the purpose of improving fuel economy Whether engine operating point in engine operating point is not at regulation in the defined region depending on highest thermal efficiency line Region in the case of, correction engine operating point be at as defined in region.

Existing technical literature

Patent document

Patent document 1：Special open 2013-071467 bulletins

Invention content

Problems to be solved by the invention

Here, if carrying out the battery overcharge of charge and discharge or overdischarge between motor can then accelerate to deteriorate.Cause This, needs SOC (the State of Charge for managing battery：Charged state) be at regulation in the range of (such as 40%~ 80%).

However, the system described in patent document 1 is only to determine engine action from the viewpoint of improving fuel economy Point, and engine operating point is not determined in view of the SOC of battery.Therefore, even if the system described in patent document 1 will be by that will send out Motivation operating point is corrected in defined region and can realize that fuel economy improves, and does not also consider the SOC of battery, Thus battery can overcharge or overdischarge sometimes.

Therefore, present invention aims at provide a kind of driving control system, will not damage fuel economy and improve effect Fruit, and can properly manage the SOC of battery.

The solution to the problem

One mode of the invention of the driving control system to solve the above problems is driving control system, is started according to target The action of machine direct torque engine has according to the action of target motor direct torque motor：Accelerator operation amount is examined Accelerator operation amount is detected in survey portion；Engine speed test section detects engine speed；Ask torque calculation section, root The request torque of driver is calculated according to above-mentioned accelerator operation amount and above-mentioned engine speed；Charge residue test section, inspection Survey the charge residue of battery；Judging torque calculation section, the charge residue calculating for corresponding to above-mentioned battery judges torque, on It states and judges that torque is basis and motor torque of the above-mentioned engine in the best operating point action of the thermal efficiency is made to find out；And Operation control part finds out above-mentioned target engine torque and above-mentioned according to the relationship of above-mentioned request torque and above-mentioned judgement torque Target motor torque, and above-mentioned engine is controlled by the target engine torque, and turned by the target motor Square controls the action of above-mentioned motor.

Invention effect

In this way, according to the present invention, turn previously according to engine of the engine when the best operating point of the thermal efficiency acts is made Square is set in the judgement torque for finding out and being used when target engine torque and target motor torque, corresponds to electricity moreover, calculating The charge residue in pond judges torque.Due to utilizing the action for judging direct torque engine and motor calculated in this way, because This, will not damage fuel economy improvement effect, and can properly manage the SOC of battery.

Description of the drawings

Fig. 1 is the figure for the driving control system for showing one embodiment of the present invention, is to show have driving control system Vehicle composition figure.

Fig. 2 is that is used in the driving control system for show one embodiment of the present invention judge the figure of torque map.

Fig. 3 is that the power generation used in the driving control system for show in the form of a table one embodiment of the present invention judges to turn The figure of Moment mapping.

Fig. 4 is that the electric discharge used in the driving control system for show in the form of a table one embodiment of the present invention judges to turn The figure of Moment mapping.

Fig. 5 shows that the power generation used in the driving control system of one embodiment of the present invention judges in the form of coordinate diagram The figure of torque map.

Fig. 6 shows that the electric discharge used in the driving control system of one embodiment of the present invention judges in the form of coordinate diagram The figure of torque map.

Fig. 7 is the engine operating point decision processing executed in the driving control system for show one embodiment of the present invention Flow chart.

Fig. 8 is to show to determine in such a way that motor generates electricity in the driving control system of one embodiment of the present invention The figure of the state of engine operating point is determined.

Fig. 9 is to show to determine in such a way that motor discharges in the driving control system of one embodiment of the present invention The figure of the state of engine operating point is determined.

Figure 10 is in the case of showing to be 60% according to SOC in the driving control system of one embodiment of the present invention Judgement torque map, the figure of the state of engine operating point is determined in such a way that motor is without action.

Figure 11 is the target hair shown in the driving control system of one embodiment of the present invention relative to request torque The figure of the guide look of motivation operating point and motor torque.

Reference sign

2 engine, 3 motor, 11 battery, 16 accelerator operation amount test section, 17 engine speed test section 21 request torque calculation section, 22 charge residue test section 23 judges 24 operation control part of torque calculation section

Specific implementation mode

Hereinafter, the embodiment that present invention will be described in detail with reference to the accompanying.Fig. 1~Figure 11 is to illustrate embodiments of the present invention Driving control system embodiment figure.

As shown in Figure 1, the vehicle 1 of the driving control system equipped with embodiments of the present invention includes engine 2, speed change Device 4 and wheel 6.

Engine 2 is for example made of four-stroke petrol engine, generates the power for making vehicle travel.

Speed changer 4 carries out speed change to power caused by engine 2.Speed changer 4 has clutch 7, utilizes the clutch 7 Power of the on-off from engine 2.

In addition, speed changer 4 has ring gear 5, the structure together such as the ring gear 5 and pinion gear (not shown) and side gear At differential gear.Wheel 6 is attached to the side gear of differential gear by the drive shaft 5a of left and right.By dynamic after 4 speed change of speed changer Power is input to ring gear 5, is then passed to the wheel 6 of left and right.

In addition, vehicle 1 includes motor 3, retarder 8, battery 11, inverter 12 and ECU20.

Motor 3 is the electric rotating machine to play a role as motor and generator, and battery is connected to by inverter 12 11.ECU20 is by controlling inverter 12 so that motor 3 generates power operation torque or power generation torque (regenerative torque).

Motor 3 is attached to ring gear 5 by retarder 8, by using from the electric power that battery 11 supplies into action edge It runs to assist the traveling of vehicle 1.In addition, motor 3 is generated electricity by the power drive transmitted from ring gear 5.

In this way, the vehicle 1 in present embodiment is as can be assisted the power of engine 2 using motor 3 Hybrid vehicle and constitute.In addition, motor 3 is not limited to be attached to ring gear 5, if be attached to from engine 2 to In the power transfer path of wheel 6.

In addition, vehicle 1 has accelerator operation amount test section 16 and engine speed test section 17.Accelerator operation amount is examined Survey portion 16 is for example set to accelerator pedal (not shown), detects accelerator operation amount.Engine speed test section 17 is for example set It is placed in the bent axle of engine 2, detects engine speed.

ECU20 is by having CPU (Central Processing Unit：Central processing unit), RAM (Random Access Memory：Random access memory), ROM (Read Only Memory：Read-only memory), flash memory, input port, The computer unit of output port and network module is constituted.

The ROM of ECU20 is stored with various constants, various mappings etc., and is stored with for making the computer unit conduct The program that ECU20 plays a role.That is, in ECU20, CPU executes the program that ROM is stored, to the computer unit conduct ECU20 plays a role.

ECU20 determines target engine torque and target motor torque to meet the request torque of driver.Then, ECU20 controls the action of engine 2 according to target engine torque, according to the action of target motor direct torque motor 3.

ECU20 has：Torque calculation section 21 is asked, the request torque of driver is calculated；And charge residue detection The charge residue of battery 11 is detected in portion 22.Hereinafter, the charge residue of battery 11 is known as SOC (State Of Charge：Charged state).

Ask torque calculation section 21 according to the accelerator operation amount detected by accelerator operation amount test section 16 and by sending out The engine speed that motivation rotating speed measring portion 17 detects calculates the request torque of driver.

In addition, as another embodiment of the present invention, vehicle 1 can also have the speed of the travel speed of detection vehicle Test section 18 is detected according to the accelerator operation amount detected by accelerator operation amount test section 16 and by bus-speed monitoring portion 18 Vehicle travel speed calculate driver request torque.

Charge residue test section 22 is input to battery 11 by using the measurement of current sensor 13 and is exported from battery 11 Electric current and added up to detect SOC.SOC is indicated with battery 11 " current residual capacity/full charge capacity × 100 " Value (%).

In addition, ECU20, which has, judges torque calculation section 23 and operation control part 24.

Judge that torque calculation section 23 corresponds to the SOC calculatings of battery 11 according to the action for keeping engine 2 best in the thermal efficiency The judgement torque that motor torque when point action is found out.As described above, judging that torque has power generation to judge that torque α and electric discharge judge Torque β.

Operation control part 24 torque and judges that the relationship of torque finds out target engine torque and target is electronic according to request Machine torque, and by the action of target engine torque control engine 2, and pass through the target motor direct torque The action of motor 3.

The ROM of ECU20 is stored with：When determining engine operating point (target engine torque), the judgement torque of reference is reflected It penetrates；When calculating power generation and judging torque α, the power generation of reference judges torque map；And the reference when calculating electric discharge and judging torque β Electric discharge judge torque map.The judgement torque map, power generation judge that torque map, electric discharge judge that torque map is to pass through experiment Etc. what is found out.

As shown in Fig. 2, judging that torque map is using torque and engine speed as the longitudinal axis and horizontal axis, by each hair Motivation rotating speed determine as judge the power generation of torque judge torque α and electric discharge judge obtained from torque β.

Power generation judges that the torque line of torque α is substantially parallel with the best line of the thermal efficiency and is set under the best line of the thermal efficiency Side.Electric discharge judges that the torque line of torque β is substantially parallel with the best line of the thermal efficiency and is set in the top of the best line of the thermal efficiency.

Therefore, power generation judges that the torque line of torque α judges that the torque line of torque β is set as each other across the thermal efficiency with electric discharge Best line is substantially parallel.

Here, the best line of the thermal efficiency is by the line at the center of the engine isoefficiency curve indicated with chain-dotted line, it is by every A engine speed determines obtained from making motor torque of the engine 2 in the best operating point action of the thermal efficiency.

Therefore, in judging torque map, judge that the torque line of torque α and electric discharge judge the torque line of torque β by power generation The region clipped is that the thermal efficiency of engine 2 is excellent and can improve the fuel economy of engine 2 compared with outside the region Region.

In the present embodiment, ECU20 sets target engine torque in the following manner：So that the operating point of engine 2 In the region that the torque line and electric discharge for judging torque α by power generation judge that the torque line of torque β clips.

In addition, power generation judges that torque α and electric discharge judge that torque β can correspond to the SOC of battery 11 and change.Specifically, Power generation judges that the torque line of torque α is SOC more high, is set to more on the lower.That is, as shown in figure 5, the SOC in battery 11 is low In the case of, even if the work using engine 2 generates electricity, battery 11 will not overcharge, therefore, setting allow engine 2 With the torque line of the motor torque of big torque action.On the other hand, in the case of the SOC high of battery 11, start when utilizing When the work of machine 2 is generated electricity, it is possible to overcharge, therefore, the hair that setting is not generated electricity actively using the action of engine 2 The torque line of motivation torque.

In addition, as shown in fig. 6, electric discharge judge that the torque line of torque β is SOC more low, be set to more against the top.That is, in electricity In the case of the SOC high in pond 11, though energetically make motor 3 work and discharge, battery 11 will not overdischarge, because This, setting allows the torque line that engine 2 is acted with small torque.On the other hand, in the case where the SOC of battery 11 is low, if Motor 3 is energetically set to work, it is likely that therefore overdischarge sets the torque of the motor torque of 2 positive actions of engine Line.

For example, as shown in Fig. 2, in the case where the request torque A of driver judges torque α less than power generation, ECU20 will be sent out Electricity judges that torque α as engine operating point (target engine torque), makes engine 2 act.In addition, in the SOC of battery 11 When SOC high than judging the corresponding batteries of torque α 11 with power generation, ECU20 will be corresponding to the power generation of the SOC of the higher battery 11 Judge that torque α ' is used as engine operating point (target engine torque), engine 2 is made to act.

That is, ECU20 judges the request of torque α and driver according to the power generation that the size of the SOC corresponding to battery 11 is set The relationship of torque A finds out target engine torque, and the action of engine 2 is controlled according to the target engine torque found out in this way. Fuel economy improvement effect will not be damaged as a result, and can properly manage the SOC of battery.

Power generation judges that torque α is to judge torque with reference to Fig. 3, power generation shown in fig. 5 by the judgement torque calculation section 23 of ECU20 Mapping and calculate.Here, Fig. 3 is to show that power generation judges the figure of torque map in the form of a table, Fig. 5 is in the form of coordinate diagram Show that power generation judges the figure of torque map.

Here, in the present embodiment, in order to prevent 11 overcharge of battery or overdischarge and accelerate to deteriorate, by battery 11 The range of management of SOC be set as 40%~80%.

In Fig. 3, power generation shown in fig. 5 judge torque map, power generation judges that the torque line of torque α is that SOC gets over Gao Zeshe It is more fixed.

That is, when SOC is 40%, SOC further declines and overdischarge in order to prevent, needs the work using engine 2 Actively generate electricity, therefore, power generation judge torque α be set to than SOC for 60% when it is high.

In addition, SOC be 60% when, compared to SOC be 40% when, need not actively generate electricity, therefore, with the SOC It is compared when being 40%, it is relatively low that power generation judges that torque α is set to.

In addition, when SOC is 80% or more, if the work using engine 2 generates electricity, SOC can be further up And overcharge, therefore, power generation judges that torque α is unrelated with engine speed and is 0N, is not sent out using the work of engine 2 Electricity.

In addition, power generation when SOC is 80% or more judges that torque α is not limited to 0N, as long as not utilizing the action of engine 2 The low-down value to overcharge.

Electric discharge judges that torque β is to judge torque with reference to Fig. 4, electric discharge shown in fig. 6 by the judgement torque calculation section 23 of ECU20 Mapping and calculate.Here, Fig. 4 is to show that electric discharge judges the figure of torque map in the form of a table, Fig. 6 is in the form of coordinate diagram Show that electric discharge judges the figure of torque map.

In Fig. 4, electric discharge shown in fig. 6 judge torque map, electric discharge judges that the torque line of torque β is SOC more low, sets It is fixed more against the top.

That is, when the SOC of battery 11 is 80%, SOC is further up in order to prevent and overcharge, needs actively to make electronic Machine 3 work and discharge, therefore, electric discharge judge torque β be set to than SOC for 60% when it is low.

In addition, SOC be 60% when, compared to SOC be 80% when, need not actively make motor 3 work, therefore, with The SOC is compared when being 80%, and it is higher that electric discharge judges that torque β is set to.

In addition, when in SOC 40% or less, if being discharged using the work of motor 3, SOC can further under Drop and overdischarge, therefore, electric discharge judge that torque β is unrelated with engine speed and is 200N, the unfavorable work with motor 3 and into Row electric discharge.Here, 200N is greater than the value of 2 producible torque capacity of engine.

In addition, electric discharge when SOC is 40% or less judges that torque β is not limited to 200N, as long as unfavorable moving with motor 3 Make the very high value of progress over-discharge.

In this way, in the present embodiment, be not so that engine is acted on 1 best line of the thermal efficiency as in the past, and It is in the area set in a manner of judging that torque α and electric discharge judge that this 2 torque lines of torque β clip the best line of the thermal efficiency by power generation It acts engine 2 in domain, therefore, the improvement effect of fuel economy will not be damaged.In addition, making power generation by corresponding to SOC Judge that torque α and electric discharge judge this 2 torque line variations of torque β, can not only meet the request torque A of driver but also will not cause Act to 11 overcharge of battery or overdischarge engine 2 and motor 3.

With reference to Fig. 7 flow chart come illustrate present embodiment as constructed as above driving control system carry out start it is motor-driven Make point decision processing.

As shown in fig. 7, first, ECU20 detects accelerator operation amount using accelerator operation amount test section 16, using starting Machine rotating speed measring portion 17 detects engine speed (step S1).

Then, ECU20 utilizes request torque according to the accelerator operation amount and engine speed detected in step sl Calculation section 21 calculates the request torque A (step S2) of driver.In addition, ECU20 can also detect speed to take in step sl Generation detection engine speed calculates request torque A according to the speed and accelerator operation amount in step s 2.

Then, ECU20 detects the SOC (step S3) of battery 11 using charge residue test section 22.

Then, ECU20 calculates to generate electricity according to SOC and engine speed judges torque α (step S4).

Then, whether ECU20 calculatings request torque A, which is less than to generate electricity, judges torque α (step S5).

In the case where the judgement of step S5 is "Yes" (in the case that request torque A judges torque α less than power generation), ECU20 is determined in step s 6 as the engine operating point (target engine torque) of target and target motor torque.

Specifically, ECU20 will be set as sentencing with power generation as the engine operating point (target engine torque) of target Value equal disconnected torque α.

Here, the difference of target engine torque and request torque A is set as target motor torque.Specifically, exist In the case that request torque A judges torque α less than power generation, i.e., target engine torque is set to judge torque α phases with power generation Deng value when, the relationship that target engine torque is α-A with request torque, which is set as target motor torque by ECU20, Control the action of motor 3.At this point, due to request torque A be less than power generation judge torque α, ECU20 make engine 2 with than The target engine torque α that the request torque A of driver is big is acted, and the redundance of the request torque A beyond driver The action of engine 2 under motor torque generates electricity for making motor 3 work.In this way, due to best in the thermal efficiency Operating point so that engine 2 is acted, therefore can realize the raising of fuel economy, and since the request beyond driver turns The action of engine 2 under the motor torque of square generates electricity for making motor 3 act, it is thus possible to efficiently utilize Energy.In addition, since the power generation that ECU20 calculatings correspond to SOC judges torque α, and torque α and driver are judged according to the power generation Request torque A relationship setting target engine torque therefore will not damage fuel economy improvement effect, and can prevent The only overcharge of battery 11.

Here, in the driving control system of present embodiment, target motor torque is target engine torque and ask The difference of torque A is sought, therefore, when the torque of the motor 3 when running power is set as positive value B, target engine torque=A+B Relationship set up.Therefore, in step s 6, ECU20 by target motor torque settings be power generation when motor 3 torque Negative value-B.In this way, motor 3 is generated electricity with the power generation torque of target engine torque and the difference of request torque A.Thereafter, ECU20 terminates the processing of the flow chart of Fig. 7.

On the other hand, in the case where the judgement of step S5 is "No", (request torque A is that power generation judges torque α or more In the case of), ECU20 calculates electric discharge according to the SOC and engine speed of battery 11 and judges torque β (step S7).

Then, ECU20 calculates whether request torque A is that electric discharge judges torque β or less (step S8).

In the case of being "Yes" in the judgement of step S8 (request torque A is that electric discharge judges that torque β is below), ECU20 will be set as the value equal with request torque A as the engine operating point (target engine torque) of target, by target Motor torque is set as 0 (step S9).That is, ECU20 makes engine 2 act in the best operating point of the thermal efficiency, without making electricity Motivation 3 act, therefore, battery 11 will not overcharge, will not overdischarge.In addition, at this point, according to the SOC corresponding to battery 11 Power generation judge that torque α and electric discharge judge that torque β sets target engine torque and therefore substantially ensured the SOC of battery 11. In this way, the driving control system of present embodiment will not damage fuel economy improvement effect, and it can properly manage battery SOC.Thereafter, ECU20 terminates the processing of the flow chart of Fig. 7.

On the other hand, in the case where the judgement of step S8 is "No", (request torque A is more than the feelings that electric discharge judges torque β Under condition), ECU20 sets the engine operating point (target engine torque) and target motor as target in step slo Torque.

Specifically, ECU20 will be set as sentencing with electric discharge as the engine operating point (target engine torque) of target Value equal disconnected torque β.

Here, the difference of target engine torque and request torque A is set as target motor torque.Specifically, exist In the case that request torque A judges torque β more than electric discharge, i.e., target engine torque is set to judge torque β phases with electric discharge Deng value when, which is set as target motor torque by the relationship that request torque and target engine torque are A- β, ECU20, Control the action of motor 3.At this point, due to request torque A be more than electric discharge judge torque β, ECU20 make engine 2 with than The target engine torque β that the request torque A of driver is small is acted, and the insufficient hair compared to the request torque A of driver Motivation torque is made up by the work of motor 3.In this way, due to making engine 2 act in the best operating point of the thermal efficiency, Can realize the raising of fuel economy, and due to making the action of motor 3 making up request torque compared to driver and Insufficient motor torque, therefore can efficiently utilize energy.In addition, since ECU20 calculates the electric discharge judgement corresponding to SOC Torque β, and judge that the relationship of the request torque A of torque β and driver set target engine torque according to the electric discharge, therefore, Fuel economy improvement effect will not be damaged, and the overcharge of battery 11 can be prevented.

Here, in the driving control system of present embodiment, target motor torque is that request torque A starts with target The difference of machine torque, therefore, when the torque of the motor 3 when running power is set as positive value B, target engine torque=A-B Relationship set up.Therefore, in step slo, target motor torque settings are motor 3 when power is run by ECU20 Torque is positive value B.In this way, the power that motor 3 generates the difference of request torque A and target engine torque runs torque, auxiliary Engine 2.Thereafter, ECU20 terminates the processing of the flow chart of Fig. 7.

Then, illustrate that the engine operating point in the case that SOC is 60%, 40%, 80% is determined using specific numerical value Surely the result handled.In addition, the 60% of SOC, 40%, 80% be the range of management of the SOC in present embodiment median, under Limit value, upper limit value.

(the case where SOC is 60%)

In the case of the 60% of the median that SOC is range of management, judge torque map as shown in Fig. 8, Fig. 9, Figure 10. In Fig. 8, Fig. 9, Tu10Zhong, power generation when engine speed is 4000rpm judges that torque α and electric discharge judge that torque β is respectively 50N、90N。

As shown in figure 8, in the case that the request torque A of the driver when engine speed is 4000rpm is 30N, ask It asks torque A to be less than power generation and judges torque α, therefore, engine operating point is set as power generation and judges torque α by ECU20.Then, ECU20 with power generation to judge that the equal target engine torques (50N) of torque α make engine act.

In addition, ECU20 will turn as-the 20N of target engine torque and the difference of request torque A as target motor Square makes motor 3 act.That is, ECU20 makes motor 3 carry out using the motor torque (20N) beyond request torque part A Power generation.

As shown in figure 9, in the case that the request torque A when engine speed is 4000rpm is 120N, torque A is asked Judge torque β more than electric discharge, therefore, engine operating point is set as electric discharge and judges torque β by ECU20.Then, ECU20 with Electric discharge judges that the equal target engine torques of torque β (90N) make engine act.

In addition, ECU20 using as the 30N of target engine torque and the difference of request torque A as target motor torque, Motor 3 is set to act.That is, ECU20 using motor 3 power operation torque come make up compared to request torque A and it is insufficient Partial torque (30N).

As shown in Figure 10, in the case that the request torque A when engine speed is 4000rpm is 80N, torque A is asked Judge torque α or more for power generation and is that electric discharge judges torque β hereinafter, therefore, ECU20 will ask torque A as target engine Torque makes engine 2 act, without making motor 3 act.

In this way, under the either case of Fig. 8, Fig. 9, Figure 10, ECU20 is so that engine operating point (target engine Torque) enter and is judged torque α by power generation and discharged to judge that the mode in region that torque β is clipped sets engine operating point.By This, will not damage fuel economy improvement effect, and properly can be discharged and be charged.In addition, above-mentioned action is not only It is to be executed when SOC is 60%, is also executed in the case where SOC is in 40% to 80% range.

(the case where SOC is 40%)

In the case of the 40% of the lower limiting value that SOC is range of management, as shown in figs. 4 and 6, electric discharge judges torque β and hair Motivation rotating speed is unrelated, and is set as very high value 200N.

Request torque A, which not more than discharges, as a result, judges torque β, and therefore, ECU20 is that power generation judges to turn in request torque A In the case of square α or more, engine 2 is set to act as target engine torque request torque A, without making motor 3 act.

On the other hand, as shown in figs. 3 and 5, power generation when SOC is 40% judges that torque α is set as than SOC when being 60% Power generation judge the big values of torque α.Therefore, the motor torque for distributing to the power generation of motor 3 becomes larger and promotes to generate electricity.

In this way, when the SOC of battery 11 is the lower limiting value of range of management, sentence if the request torque A of driver is power generation Break torque α or more, then ECU20 makes engine 2 act with the request torque A of driver, without making motor 3 act.Another party Target engine torque is set as and the judgement that generates electricity by face if the request torque A of driver is less than power generation and judges torque α Value equal torque α, the difference of the target engine torque and the request torque A of driver is sharp as target motor torque It is generated electricity with motor 3.The overdischarge of battery 11 is prevented as a result,.

As described above, in the case where SOC is 40%, ECU20 sets target engine torque and target in the following manner Motor torque：Power is not exported from motor 3 and run torque, and promote the power generation of motor 3.In addition, even if due to electricity In the case that electric loading etc. other than motivation 3 causes SOC to be less than 40%, ECU20 is also controlled as described above.

(the case where SOC is 80%)

In the case of the 80% of the upper limit value that SOC is range of management, as shown in figs. 3 and 5, power generation judges torque α and hair Motivation rotating speed is unrelated, and is set as very small value 0N.

Request torque A will not judge torque α less than power generation as a result, and therefore, ECU20 is that electric discharge judgement turns in request torque A In the case of square β is below, engine 2 is set to act as target engine torque request torque A, without making motor 3 act.

On the other hand, as shown in figs. 4 and 6, electric discharge when SOC is 80% judges that torque β is set as than SOC when being 60% Electric discharge judge the small values of torque β, therefore, run by the power of motor 3, that is, pass through motor auxiliary and promote battery 11 Electric discharge.

In this way, when the SOC of battery 11 is the upper limit value of range of management, sentence if the request torque A of driver is electric discharge Disconnected torque β is hereinafter, then ECU20 makes engine 2 act with the request torque A of driver, without making motor 3 act.Another party Target engine torque is set as and judgement of discharging by face if the request torque A of driver is more than electric discharge and judges torque β Value equal torque β makes using the target engine torque and the difference of the request torque A of driver as target motor torque Motor 3 is acted and is discharged.The overcharge of battery 11 is prevented as a result,.

As described above, in the case where SOC is 80%, ECU20 sets target engine torque and target in the following manner Motor torque：So that motor 3 is generated electricity, and runs the electric discharge for promoting battery 11 by the power of motor 3.In addition, Even if being carried out as described above if ECU20 since the electric loading etc. other than motor 3 causes SOC to be more than 80% Control.

The function and effect of the driving control system of present embodiment described above are illustrated.

In the driving control system of present embodiment, judge that torque calculation section 23 corresponds to the SOC calculating roots of battery 11 According to the judgement torque for making motor torque of the engine 2 in the best operating point action of the thermal efficiency find out.Then, action control Portion 24 is according to the request torque A of driver and judges that the relationship of torque finds out target engine torque and target motor torque, And so that engine 2 is acted by the target engine torque, and so that motor 3 is acted by the target motor torque.

By such composition, previously according to making motor torque of the engine when the best operating point of the thermal efficiency acts (the best line of the thermal efficiency), which is set in, to be found out the judgement torque that is used when target engine torque and target motor torque (power generation is sentenced Disconnected torque α and electric discharge judge torque β), moreover, calculating the judgement torque of the SOC corresponding to battery 11.Sentenced using what is calculated in this way Therefore the action of disconnected direct torque engine and motor will not damage fuel economy improvement effect, and can properly manage Manage the SOC of battery.

In addition, in the driving control system of present embodiment, judge that torque calculation section 23 corresponds to the SOC calculations of battery 11 Go out power generation when generating electricity and judges torque α.

Then, power generation is judged torque α by operation control part 24 in the case where asking torque A to judge torque α less than power generation Engine 2 is set to act as target engine torque, using target engine torque and the difference of request torque A as target motor Torque makes motor 3 act.

By this composition, as shown in figure 11, in the case where asking torque A to judge torque α less than power generation, power generation is judged Torque α makes engine 2 act as target engine torque.

That is, as shown in figure 11, being in request torque A and judging the operating point correcting areas of torque α on the lower than power generation In the case of, correction is promoted to the torque line that power generation judges torque α as the engine operating point of target.Therefore, it is possible to Realize that fuel economy improves.

In addition, by regarding the difference of target engine torque and request torque A as target motor torque, make motor 3 Action is to generate power generation torque.Therefore, the electric power sent out by motor 3 charges to battery 11, can prevent the mistake of battery 11 from putting Electricity.

In addition, power generation judges that torque α corresponds to the SOC calculatings of battery 11, carried therefore, it is possible to take into account fuel economy High and battery 11 overdischarge prevents.As a result, can either realize that fuel economy improves and can manage battery SOC。

In addition, in the driving control system of present embodiment, judge that torque calculation section 23 corresponds to the SOC calculations of battery 11 Go out electric discharge when discharging and judges torque β.

Then, electric discharge is judged torque β by operation control part 24 in the case where asking torque A to judge torque β more than electric discharge Engine 2 is set to act as target engine torque, using target engine torque and the difference of request torque A as target motor Torque makes motor 3 act.

By this composition, as shown in figure 11, in the case where asking torque A to judge torque β more than electric discharge, electric discharge is judged Torque β makes engine 2 act as target engine torque.

That is, as shown in figure 11, being in request torque A and judging torque β operating point correcting areas against the top than electric discharge In the case of, correction, which is reduced to discharge as the engine operating point of target, judges the torque line of torque β.Therefore, it is possible to Realize that fuel economy improves.

In addition, by regarding the difference of target engine torque and request torque A as target motor torque, make motor 3 Action is to generate power generation torque.Therefore, so that battery 11 is discharged by the operation of the power of motor 3, the mistake of battery 11 can be prevented Charging.

In addition, electric discharge judges that torque β corresponds to the SOC calculatings of battery 11, carried therefore, it is possible to take into account fuel economy High and battery 11 overcharge prevents.As a result, can either realize that fuel economy improves and can manage battery 11 SOC。

In the driving control system of present embodiment, judge that torque calculation section 23 corresponds to the SOC calculating hairs of battery 11 Power generation when electric judges that electric discharge when torque α and electric discharge judges torque β.

Then, operation control part 24 is that power generation judges that torque α or more and request torque A are that electric discharge judges in request torque A In the case of torque β is below, engine 2 is set to act as target engine torque request torque A, without keeping motor 3 dynamic Make.

It is that power generation judges that torque α or more and request torque A are electric discharge in request torque A as shown in figure 11 by this composition In the case of judging that torque β is below, engine 2 is set to act as target engine torque request torque A.

That is, it is as shown in figure 11, it is in request torque A and judges torque β on the lower than electric discharge and compare to generate electricity to judge that torque α is leaned on In the case of the region of top, the engine operating point as target is set as equal with request torque A, and motor 3 Motor torque is 0.As a result, the SOC that can either be realized that fuel economy improves and battery 11 can be managed.

Although disclosing embodiments of the present invention, add it will be appreciated that the scope of the present invention can not departed from With change.Claim is intended to include all this amendments and equivalent.

For example, the range of management of SOC is not limited to 40%~80%.In addition, judging that torque map, power generation judge torque map With electric discharge judge that the value of torque map is an example, these values can according to what kind of balance take into account fuel economy raising with The management of SOC and it is different.In the case where fuel economy improves preferential, power generation is preferably made to judge that torque α and electric discharge judge to turn The torque line of square β is close to the best line of the thermal efficiency.In addition, the optimum value respectively mapped also can be with city according to contemplated driving mode Area travel and any in running at high speed based on and it is different.

Claims

1. a kind of driving control system controls the action of engine according to target engine torque, according to target motor torque The action for controlling motor, has：

Accelerator operation amount test section detects accelerator operation amount；

Engine speed test section detects engine speed；

Torque calculation section is asked, the request that driver is calculated according to above-mentioned accelerator operation amount and above-mentioned engine speed turns Square；And

Charge residue test section detects the charge residue of battery,

Above-mentioned driving control system is characterized in that having：

Judge torque calculation section, the charge residue calculating for corresponding to above-mentioned battery judges torque, and above-mentioned judgement torque is root It is found out according to motor torque of the above-mentioned engine in the best operating point action of the thermal efficiency is made；And

Operation control part, according to the relationship of above-mentioned request torque and above-mentioned judgement torque find out above-mentioned target engine torque and Above-mentioned target motor torque, and above-mentioned engine is controlled by the target engine torque, and it is electronic by the target The action of the above-mentioned motor of machine direct torque.

2. driving control system according to claim 1, which is characterized in that

The power generation when charge residue that above-mentioned judgement torque calculation section corresponds to above-mentioned battery calculates power generation judges torque,

Above-mentioned operation control part judges to turn in the case where above-mentioned request torque judges torque less than above-mentioned power generation, by above-mentioned power generation Square makes above-mentioned engine act as target engine torque, and above-mentioned target engine torque and the difference of above-mentioned request torque are made Make above-mentioned motor action for target motor torque.

3. the driving control system according to claim 1 or claim 2, which is characterized in that

The electric discharge when charge residue that above-mentioned judgement torque calculation section corresponds to above-mentioned battery calculates electric discharge judges torque,

Above-mentioned operation control part judges to turn in the case where above-mentioned request torque judges torque more than above-mentioned electric discharge, by above-mentioned electric discharge Square makes above-mentioned engine act as target engine torque, and above-mentioned target engine torque and the difference of above-mentioned request torque are made Make above-mentioned motor action for target motor torque.

4. the driving control system according to claim 1 or claim 2, which is characterized in that

The power generation when charge residue that above-mentioned judgement torque calculation section corresponds to above-mentioned battery calculates power generation judges torque and puts Electric discharge when electric judges torque,

Above-mentioned operation control part is that above-mentioned power generation judges that torque or more and above-mentioned request torque are above-mentioned put in above-mentioned request torque In the case of electricity judges that torque is below, controlled in the following manner：Using above-mentioned request torque as target engine torque, make Above-mentioned engine action is without making above-mentioned motor action.

5. driving control system according to claim 3, which is characterized in that