CN104828052A - Hybrid power automobile, vacuum boosting system and control method of vacuum boosting system - Google Patents
Hybrid power automobile, vacuum boosting system and control method of vacuum boosting system Download PDFInfo
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- CN104828052A CN104828052A CN201410449678.8A CN201410449678A CN104828052A CN 104828052 A CN104828052 A CN 104828052A CN 201410449678 A CN201410449678 A CN 201410449678A CN 104828052 A CN104828052 A CN 104828052A
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- 238000010586 diagram Methods 0.000 description 10
- 239000000295 fuel oil Substances 0.000 description 9
- 230000007812 deficiency Effects 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 230000006399 behavior Effects 0.000 description 4
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
- B60T13/563—Vacuum systems indirect, i.e. vacuum booster units with multiple booster units, e.g. tandem booster units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a hybrid power automobile, a vacuum boosting system and a control method of the vacuum boosting system. The vacuum boosting system comprises a vacuum tank, a first vacuum generating device, a low-voltage storage battery, a second vacuum generating device, a vacuum pressure sensor and a vehicle control unit. The first vacuum generating device generates first vacuum according to the negative pressure generated by an air inlet manifold of an engine. The second vacuum generating device is supplied with power by the low-voltage storage battery to generate second vacuum. The vacuum pressure sensor is used for detecting the vacuum degree in the vacuum tank. The vehicle control unit receives the opening degree signal of a throttle valve and the rotating speed signal of the engine through a CAN bus, judges the vacuum generating capacity of the engine according to the vacuum degree in the vacuum tank, the opening degree signal of the throttle valve and the rotating speed signal of the engine, and controls the second vacuum generating device according to the vacuum generating capacity of the engine. The double vacuum generating devices are adopted in the vacuum boosting system, so that the traveling safety of the hybrid power automobile is improved, fuel consumption is also lowered to a certain extent, and the emission performance of the automobile is improved.
Description
Technical field
The present invention relates to automobile brake technical field, particularly the control method of a kind of vacuum boost system of hybrid vehicle, a kind of vacuum boost system of hybrid vehicle and one have this vacuum boost system hybrid vehicle.
Background technology
The driving safety of vacuum boost system on vehicle to vehicle is most important.In order to reduce driver intensity, improve the driving safety of vehicle, almost numerous vehicle is provided with vacuum boost system.
The kind of vacuum boost system of braking has multiple, and wherein most popular is exactly the negative pressure manufacture vacuum utilizing engine intake manifold to produce, then the vacuum of manufacture is stored in an airtight system.For this vacuum boost system; the shortcoming existed is once engine off; just can not produce vacuum again; if in vehicle travel process, driving engine stops working suddenly due to fault like this; larger potential safety hazard will be there is; particularly in motor vehicle driven by mixed power; driving engine has start-stop function; if the used up words of degree of vacuum need to restart driving engine continuation generation vacuum when engine idle is shut down; because now driving engine is in idling mode; oil consumption is all undesirable with discharge, which not only adds oil consumption, and creates a large amount of disposal of pollutants gas.
Summary of the invention
Object of the present invention is intended at least solve above-mentioned technological deficiency.
For this reason, first object of the present invention is the vacuum boost system proposing a kind of hybrid vehicle, adopts double manifold vacuum generation device, can improve the safety that hybrid electric vehicle is sailed, fuel oil consumption can be reduced to a certain extent again, improve auto emission performance.
Second object of the present invention is to propose a kind of hybrid vehicle.3rd object of the present invention is the control method of the vacuum boost system proposing a kind of hybrid vehicle.
For achieving the above object, the vacuum boost system of a kind of hybrid vehicle that one aspect of the present invention embodiment proposes, comprising: vacuum reservoir, described vacuum reservoir is for storing vacuum; First device for vacuum generation, the negative pressure that described first device for vacuum generation is produced by the induction maniflod of driving engine produces the first vacuum, and described first vacuum is input to described vacuum reservoir, and wherein, described first device for vacuum generation comprises throttle gate; Low tension battery, described low tension battery is used for providing low potential source; Second device for vacuum generation, described second device for vacuum generation is powered to produce the second vacuum by described low tension battery, and described second vacuum is input to described vacuum reservoir; Vacuum pressure sensor, described vacuum pressure sensor is for detecting the degree of vacuum in described vacuum reservoir; Entire car controller, described entire car controller receives the opening amount signal of described throttle gate and the tach signal of described driving engine of engine controller transmission by CAN, and judge the generation vacuum capacity of described driving engine according to the opening amount signal of the degree of vacuum in described vacuum reservoir, described throttle gate and the tach signal of described driving engine, and according to the generation vacuum capacity of described driving engine, described second device for vacuum generation is controlled.
According to the vacuum boost system of the hybrid vehicle of the embodiment of the present invention, the negative pressure that first device for vacuum generation is produced by the induction maniflod of driving engine produces the first vacuum, then the first vacuum is input to vacuum reservoir, second device for vacuum generation is powered to produce the second vacuum by low tension battery, and the second vacuum is input to vacuum reservoir.Wherein, entire car controller judges the generation vacuum capacity of driving engine according to the opening amount signal of the degree of vacuum in vacuum reservoir, throttle gate and the tach signal of driving engine, and controls the second device for vacuum generation according to the generation vacuum capacity of driving engine.Therefore, the vacuum boost system of the hybrid vehicle of the embodiment of the present invention produces vacuum respectively by employing first device for vacuum generation and the second device for vacuum generation, avoid the potential safety hazard that hybrid vehicle brings because engine breakdown causes vacuum degree deficiency when braking, substantially increase the safety that hybrid electric vehicle is sailed, and also reduce fuel oil consumption to a certain extent, improve auto emission performance, so integrate the advantages such as safety, reliability, the oil consumption of reduction hybrid vehicle and discharge, there is very large practicality.
According to one embodiment of present invention, when the generation vacuum capacity of described driving engine meets preset requirement, described in described vehicle control unit controls, the second device for vacuum generation quits work; When the generation vacuum capacity of described driving engine does not meet described preset requirement, described in described vehicle control unit controls, the second device for vacuum generation is started working.
According to one embodiment of present invention, described second device for vacuum generation is electric vacuum pump.
According to one embodiment of present invention, described first device for vacuum generation also comprises air filter, and described air filter is connected to filter the air entering into described throttle gate with described throttle gate.
According to one embodiment of present invention, between described vacuum reservoir and described first device for vacuum generation, be provided with the first check valve, and be provided with the second check valve between described vacuum reservoir and described second device for vacuum generation.
According to one embodiment of present invention, described entire car controller is also for carrying out trouble diagnosing to described electric vacuum pump.
And, when described driving engine is in idle stop, and when the degree of vacuum in described vacuum reservoir is less than preset value, described entire car controller judges whether described electric vacuum pump exists fault, if so, then by engine starting described in described engine controller controls; If not, then control described electric vacuum pump to start working.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of control method of vacuum boost system of hybrid vehicle, wherein, this vacuum boost system is the vacuum boost system of above-mentioned hybrid vehicle, described control method comprises the following steps: detect the degree of vacuum in described vacuum reservoir, and receives the opening amount signal of described throttle gate and the tach signal of described driving engine of engine controller transmission by CAN; Judge the generation vacuum capacity of described driving engine according to the opening amount signal of the degree of vacuum in described vacuum reservoir, described throttle gate and the tach signal of described driving engine, and according to the generation vacuum capacity of described driving engine, described second device for vacuum generation is controlled.
According to the control method of the vacuum boost system of the hybrid vehicle of the embodiment of the present invention, first the degree of vacuum in vacuum reservoir is detected, received the opening amount signal of throttle gate and the tach signal of driving engine of engine controller transmission by CAN simultaneously, then according to the degree of vacuum in vacuum reservoir, the opening amount signal of throttle gate and the tach signal of driving engine judge the generation vacuum capacity of driving engine, and control namely to judge whether that startup second device for vacuum generation carries out work to the second device for vacuum generation according to the generation vacuum capacity of driving engine, vacuum is produced respectively like this by the first device for vacuum generation in vacuum boost system and the second device for vacuum generation, avoid the potential safety hazard that hybrid vehicle brings because engine breakdown causes vacuum degree deficiency when braking, substantially increase the safety that hybrid electric vehicle is sailed, and also reduce fuel oil consumption to a certain extent, improve auto emission performance.
According to one embodiment of present invention, when the generation vacuum capacity of described driving engine meets preset requirement, control described second device for vacuum generation and quit work; When the generation vacuum capacity of described driving engine does not meet described preset requirement, control described second device for vacuum generation and start working.
According to one embodiment of present invention, described second device for vacuum generation is electric vacuum pump, wherein, when described driving engine is in idle stop, and when the degree of vacuum in described vacuum reservoir is less than preset value, judges whether described electric vacuum pump exists fault; If so, then by engine starting described in described engine controller controls; If not, then control described electric vacuum pump to start working.
In addition, the embodiment of the present invention also proposed a kind of hybrid vehicle, and it comprises the vacuum boost system of above-mentioned hybrid vehicle.
The hybrid vehicle of the embodiment of the present invention can utilize when braking the degree of vacuum produced respectively by the first device for vacuum generation in vacuum boost system and the second device for vacuum generation in vacuum reservoir, avoid the potential safety hazard brought because engine breakdown causes vacuum degree deficiency when braking, driving safety is greatly enhanced, and also reduce fuel oil consumption to a certain extent, improve emission behavior.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the block diagram of the vacuum boost system of hybrid vehicle according to the embodiment of the present invention;
Fig. 2 is the block diagram of the power system of hybrid vehicle according to an embodiment of the invention;
Fig. 3 is the peripheral signal schematic diagram of entire car controller according to an embodiment of the invention;
Fig. 4 be the rotating speed of the vacuum capability of driving engine according to an embodiment of the invention and driving engine, throttle gate aperture between relation schematic diagram;
Fig. 5 is to the schematic diagram that electric vacuum pump controls when hybrid electric vehicle is sailed according to an embodiment of the invention; And
Fig. 6 is the diagram of circuit of the control method of the vacuum boost system of hybrid vehicle according to the embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In describing the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Describe the vacuum boost system of the hybrid vehicle proposed according to the embodiment of the present invention with reference to the accompanying drawings, there is the control method of the hybrid vehicle of this vacuum boost system and the vacuum boost system of hybrid vehicle.
Fig. 1 is the block diagram of the vacuum boost system of hybrid vehicle according to the embodiment of the present invention, and Fig. 2 is the block diagram of the power system of hybrid vehicle according to an embodiment of the invention.See figures.1.and.2, the vacuum boost system of the hybrid vehicle of the embodiment of the present invention comprises: vacuum reservoir 10, first device for vacuum generation 20, low tension battery 30, second device for vacuum generation 40, vacuum pressure sensor 50 and entire car controller 60.
Wherein, vacuum reservoir 10 is for storing vacuum, and the negative pressure that the first device for vacuum generation 20 is produced by the induction maniflod of driving engine produces the first vacuum, and the first vacuum is input to vacuum reservoir 10, and wherein, the first device for vacuum generation 20 comprises throttle gate 201; Low tension battery 30 is for providing low potential source, and need the parts of low-voltage power supply to power to give in vacuum boost system, the second device for vacuum generation 40 is powered to produce the second vacuum by low tension battery 30, and described second vacuum is input to vacuum reservoir 10; Vacuum pressure sensor 50 is for detecting the degree of vacuum in vacuum reservoir 10, namely the degree of vacuum in vacuum reservoir is reacted by the pressure state detected in vacuum reservoir 10, and by the signal feedback that detects to entire car controller 60, whether work so that entire car controller 60 judges to control the second device for vacuum generation 40.
Entire car controller 60 receives the opening amount signal of described throttle gate and the tach signal of described driving engine of engine controller 70 transmission by CAN, and judge the generation vacuum capacity of described driving engine according to the opening amount signal of the degree of vacuum in described vacuum reservoir, described throttle gate and the tach signal of described driving engine, and according to the generation vacuum capacity of described driving engine, the second device for vacuum generation 40 is controlled.Wherein, as shown in Figure 3, CAN load module 601 in entire car controller 60 receives the opening amount signal of throttle gate and the tach signal of driving engine of engine controller 70 transmission by CAN, receive by analog input module 602 vacuum-pressure signal that vacuum pressure sensor 50 detects simultaneously, the degree of vacuum in vacuum reservoir 10 is obtained according to the vacuum-pressure signal of the vacuum pressure sensor received, and work enable signal to the second device for vacuum generation 40 can also be sent by digital output module 603, carry out work to control the second device for vacuum generation 40.
With reference to Fig. 2, the power system of above-mentioned hybrid vehicle comprises driving engine (not shown), engine controller 70, BSG motor 80, BSG electric machine controller 90, entire car controller 60, electrokinetic cell 100 and AMT (automatic transmission with hydraulic torque converter) 110 etc., wherein each controller carries out communication and the interworking of CAN signal by CAN, BSG motor 80 has start the engine and electricity generate function concurrently, also there is power-aid function simultaneously, entire car controller 60 can control the idle stop of driving engine, the work of driving engine will be stopped when the lower and engine idle of the velocity ratio of hybrid vehicle.
According to one embodiment of present invention, as shown in Figure 1, the second device for vacuum generation 40 is electric vacuum pump.Further, entire car controller 60 also for carrying out trouble diagnosing to described electric vacuum pump, is namely sayed, entire car controller 60 also has the fault diagnosis functions of vacuum pump.
Further, when described driving engine is in idle stop, and when the degree of vacuum in vacuum reservoir 10 is less than preset value, entire car controller 60 judges whether described electric vacuum pump exists fault, if so, then controls described engine starting by engine controller 70; If not, then control described electric vacuum pump to start working.That is; when engine idle is shut down; when the degree of vacuum in the higher i.e. vacuum reservoir 10 of the vacuum pressure that vacuum pressure sensor 50 detects in vacuum reservoir is less than preset value; need to vacuumize; for the common automobile with idle stop function; now need start the engine, and the oil consumption of driving engine when idling and discharge are all very undesirable.Therefore, first the vacuum boost system of the hybrid vehicle of the embodiment of the present invention is considered to use electric vacuum pump to vacuumize in this case, if just start the engine vacuumizes when electric vacuum pump exists fault, thus the vacuum boost system of the hybrid vehicle of the embodiment of the present invention can reduce fuel oil consumption, improves emission behavior.
According to one embodiment of present invention, as shown in Figure 1, between vacuum reservoir 10 and the first device for vacuum generation 20, be provided with the first check valve 120, and be provided with the second check valve 130 between vacuum reservoir 10 and the second device for vacuum generation 40.Check valve, for controlling the nonreturn flow of the degree of vacuum in vacuum reservoir 10, is unlikely to cause the degree of vacuum inside vacuum reservoir 10 to reveal when the first and second device for vacuum generation do not work or when the vacuum of generation is inadequate.
Further, as shown in Figure 1, the first device for vacuum generation 20 also comprises air filter 202, and air filter 202 is connected to filter the air entering into throttle gate 201 with throttle gate 201.
According to one embodiment of present invention, between the rotating speed of the generation vacuum capacity of driving engine and vacuum capability and driving engine, the aperture of throttle gate, relation as shown in Figure 4, because the vacuum capability of driving engine exists fugitiveness, great variety can be there is, so stable performance unlike electric vacuum pump according to the rotating speed of driving engine and the aperture of throttle gate.The mechanism that driving engine vacuumizes determines its this characteristic, and when under the aperture at same throttle gate, the rotating speed of driving engine is higher, and vacuum capability is stronger, and under the rotating speed of same driving engine, the aperture of throttle gate is less, and vacuum capability is stronger.When throttle gate is opened completely, almost lose vacuum capability, when driving engine is in idling mode, vacuum capability is the strongest.Therefore, according to this characteristic that driving engine vacuumizes, when the vacuum capability of driving engine is very poor, utilize electric vacuum pump to carry out the compensation of degree of vacuum in time, thus improve the safety of hybrid vehicle operation.
Particularly, as shown in Figure 5, entire car controller comprehensively can judge the vacuum capability of driving engine according to the degree of vacuum in the aperture of the rotating speed of driving engine, throttle gate and vacuum reservoir, when driving engine has enough vacuum capability, entire car controller will allow electric vacuum pump quit work, vacuumizing of task has been gone by driving engine, when the opening ratio due to throttle gate causes comparatively greatly the vacuum capability of driving engine to decline, entire car controller can start electric vacuum pump and carry out vacuumizing compensation, until the degree of vacuum in vacuum reservoir reaches the value of setting.Namely say, when the generation vacuum capacity of described driving engine meets preset requirement, described in described vehicle control unit controls, the second device for vacuum generation quits work; When the generation vacuum capacity of described driving engine does not meet described preset requirement, described in described vehicle control unit controls, the second device for vacuum generation is started working.
According to the vacuum boost system of the hybrid vehicle of the embodiment of the present invention, the negative pressure that first device for vacuum generation is produced by the induction maniflod of driving engine produces the first vacuum, then the first vacuum is input to vacuum reservoir, second device for vacuum generation is powered to produce the second vacuum by low tension battery, and the second vacuum is input to vacuum reservoir.Wherein, entire car controller judges the generation vacuum capacity of driving engine according to the opening amount signal of the degree of vacuum in vacuum reservoir, throttle gate and the tach signal of driving engine, and controls the second device for vacuum generation according to the generation vacuum capacity of driving engine.Therefore, the vacuum boost system of the hybrid vehicle of the embodiment of the present invention produces vacuum respectively by employing first device for vacuum generation and the second device for vacuum generation, avoid the potential safety hazard that hybrid vehicle brings because engine breakdown causes vacuum degree deficiency when braking, substantially increase the safety that hybrid electric vehicle is sailed, and also reduce fuel oil consumption to a certain extent, improve auto emission performance, so integrate the advantages such as safety, reliability, the oil consumption of reduction hybrid vehicle and discharge, there is very large practicality.
Fig. 6 is the diagram of circuit of the control method of the vacuum boost system of hybrid vehicle according to the embodiment of the present invention.Wherein, this vacuum boost system is the vacuum boost system of the hybrid vehicle that above-described embodiment describes, and the control method of the vacuum boost system of this hybrid vehicle comprises the following steps:
S1, detects the degree of vacuum in vacuum reservoir, and receives the opening amount signal of throttle gate and the tach signal of driving engine of engine controller transmission by CAN.
Wherein, the degree of vacuum in vacuum reservoir is reacted by the vacuum pressure sensor vacuum pressure detected in vacuum reservoir.
S2, judges the generation vacuum capacity of driving engine according to the opening amount signal of the degree of vacuum in vacuum reservoir, throttle gate and the tach signal of driving engine, and controls the second device for vacuum generation according to the generation vacuum capacity of driving engine.
Wherein, when the generation vacuum capacity of described driving engine meets preset requirement, control described second device for vacuum generation and quit work; When the generation vacuum capacity of described driving engine does not meet described preset requirement, control described second device for vacuum generation and start working.
That is, in an embodiment of the present invention, can according to the rotating speed of driving engine, degree of vacuum in the aperture of throttle gate and vacuum reservoir comprehensively judges the vacuum capability of driving engine, when driving engine has enough vacuum capability namely to meet preset requirement, the second device for vacuum generation and electric vacuum pump will be allowed to quit work, vacuumizing of task has been gone by driving engine, when the opening ratio due to throttle gate causes comparatively greatly the decline of the vacuum capability of driving engine namely not meet preset requirement, electric vacuum pump will be started carry out vacuumizing compensation, until the degree of vacuum in vacuum reservoir reaches the value of setting.
Therefore, utilize electric vacuum pump to carry out the compensation of degree of vacuum in time, thus improve the safety of hybrid vehicle operation.
According to one embodiment of present invention, described second device for vacuum generation is electric vacuum pump, wherein, when described driving engine is in idle stop, and when the degree of vacuum in described vacuum reservoir is less than preset value, judges whether described electric vacuum pump exists fault; If so, then by engine starting described in described engine controller controls; If not, then control described electric vacuum pump to start working.
That is; when engine idle is shut down; when the degree of vacuum in the higher i.e. vacuum reservoir of the vacuum pressure that vacuum pressure sensor detects in vacuum reservoir is less than preset value; need to vacuumize; for the common automobile with idle stop function; now need start the engine, and the oil consumption of driving engine when idling and discharge are all very undesirable.Therefore, first the control method of the vacuum boost system of the hybrid vehicle of the embodiment of the present invention is considered to use electric vacuum pump to vacuumize in this case, if just start the engine vacuumizes when electric vacuum pump exists fault, thus the control method of the vacuum boost system of the hybrid vehicle of the embodiment of the present invention can reduce the fuel oil consumption of hybrid vehicle, improves emission behavior.
According to the control method of the vacuum boost system of the hybrid vehicle of the embodiment of the present invention, first the degree of vacuum in vacuum reservoir is detected, received the opening amount signal of throttle gate and the tach signal of driving engine of engine controller transmission by CAN simultaneously, then according to the degree of vacuum in vacuum reservoir, the opening amount signal of throttle gate and the tach signal of driving engine judge the generation vacuum capacity of driving engine, and control namely to judge whether that startup second device for vacuum generation carries out work to the second device for vacuum generation according to the generation vacuum capacity of driving engine, vacuum is produced respectively like this by the first device for vacuum generation in vacuum boost system and the second device for vacuum generation, avoid the potential safety hazard that hybrid vehicle brings because engine breakdown causes vacuum degree deficiency when braking, substantially increase the safety that hybrid electric vehicle is sailed, and also reduce fuel oil consumption to a certain extent, improve auto emission performance.
In addition, embodiments of the invention also proposed a kind of hybrid vehicle, and it comprises the vacuum boost system of above-mentioned hybrid vehicle.
The hybrid vehicle of the embodiment of the present invention can utilize when braking the degree of vacuum produced respectively by the first device for vacuum generation in vacuum boost system and the second device for vacuum generation in vacuum reservoir, avoid the potential safety hazard brought because engine breakdown causes vacuum degree deficiency when braking, driving safety is greatly enhanced, and also reduce fuel oil consumption to a certain extent, improve emission behavior.
Describe and can be understood in diagram of circuit or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of treater or other can from instruction execution system, device or equipment fetch instruction and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this specification sheets, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronics package) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM) (ROM), erasablely edit read-only memory (ROM) (EPROM or flash memory), fiber device, and portable optic disk read-only memory (ROM) (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanning to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinatory logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory (ROM), disk or CD etc.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (11)
1. a vacuum boost system for hybrid vehicle, is characterized in that, comprising:
Vacuum reservoir, described vacuum reservoir is for storing vacuum;
First device for vacuum generation, the negative pressure that described first device for vacuum generation is produced by the induction maniflod of driving engine produces the first vacuum, and described first vacuum is input to described vacuum reservoir, and wherein, described first device for vacuum generation comprises throttle gate;
Low tension battery, described low tension battery is used for providing low potential source;
Second device for vacuum generation, described second device for vacuum generation is powered to produce the second vacuum by described low tension battery, and described second vacuum is input to described vacuum reservoir;
Vacuum pressure sensor, described vacuum pressure sensor is for detecting the degree of vacuum in described vacuum reservoir;
Entire car controller, described entire car controller receives the opening amount signal of described throttle gate and the tach signal of described driving engine of engine controller transmission by CAN, and judge the generation vacuum capacity of described driving engine according to the opening amount signal of the degree of vacuum in described vacuum reservoir, described throttle gate and the tach signal of described driving engine, and according to the generation vacuum capacity of described driving engine, described second device for vacuum generation is controlled.
2. the vacuum boost system of hybrid vehicle as claimed in claim 1, is characterized in that,
When the generation vacuum capacity of described driving engine meets preset requirement, described in described vehicle control unit controls, the second device for vacuum generation quits work;
When the generation vacuum capacity of described driving engine does not meet described preset requirement, described in described vehicle control unit controls, the second device for vacuum generation is started working.
3. the vacuum boost system of hybrid vehicle as claimed in claim 1, it is characterized in that, described second device for vacuum generation is electric vacuum pump.
4. the vacuum boost system of hybrid vehicle as claimed in claim 1, it is characterized in that, described first device for vacuum generation also comprises air filter, and described air filter is connected to filter the air entering into described throttle gate with described throttle gate.
5. the vacuum boost system of the hybrid vehicle according to any one of claim 1-4, it is characterized in that, between described vacuum reservoir and described first device for vacuum generation, be provided with the first check valve, and be provided with the second check valve between described vacuum reservoir and described second device for vacuum generation.
6. the vacuum boost system of hybrid vehicle as claimed in claim 3, it is characterized in that, described entire car controller is also for carrying out trouble diagnosing to described electric vacuum pump.
7. the vacuum boost system of hybrid vehicle as claimed in claim 6, it is characterized in that, when described driving engine is in idle stop, and the degree of vacuum in described vacuum reservoir is when being less than preset value, described entire car controller judges whether described electric vacuum pump exists fault, if so, then by engine starting described in described engine controller controls;
If not, then control described electric vacuum pump to start working.
8. a hybrid vehicle, is characterized in that, comprises the vacuum boost system of the hybrid vehicle according to any one of claim 1-7.
9. a control method for the vacuum boost system of the hybrid vehicle according to any one of claim 1-7, is characterized in that, comprises the following steps:
Detect the degree of vacuum in described vacuum reservoir, and receive the opening amount signal of described throttle gate and the tach signal of described driving engine of engine controller transmission by CAN;
Judge the generation vacuum capacity of described driving engine according to the opening amount signal of the degree of vacuum in described vacuum reservoir, described throttle gate and the tach signal of described driving engine, and according to the generation vacuum capacity of described driving engine, described second device for vacuum generation is controlled.
10. the control method of the vacuum boost system of hybrid vehicle as claimed in claim 9, is characterized in that,
When the generation vacuum capacity of described driving engine meets preset requirement, control described second device for vacuum generation and quit work;
When the generation vacuum capacity of described driving engine does not meet described preset requirement, control described second device for vacuum generation and start working.
The control method of the vacuum boost system of 11. hybrid vehicles as claimed in claim 9, it is characterized in that, described second device for vacuum generation is electric vacuum pump, wherein,
When described driving engine is in idle stop, and when the degree of vacuum in described vacuum reservoir is less than preset value, judge whether described electric vacuum pump exists fault;
If so, then by engine starting described in described engine controller controls;
If not, then control described electric vacuum pump to start working.
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