CN102910063A - Hydraulic system and control method for hybrid electric vehicle - Google Patents
Hydraulic system and control method for hybrid electric vehicle Download PDFInfo
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- CN102910063A CN102910063A CN201210430797XA CN201210430797A CN102910063A CN 102910063 A CN102910063 A CN 102910063A CN 201210430797X A CN201210430797X A CN 201210430797XA CN 201210430797 A CN201210430797 A CN 201210430797A CN 102910063 A CN102910063 A CN 102910063A
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Abstract
The invention discloses a hydraulic system and a control method for a hybrid electric vehicle, which are used for implementing starting under the pure electrical working condition. The hydraulic system comprises a CVT (Continuously Variable Transmission) hydraulic system, an external hydraulic system, a hybrid control unit HCU and an ISG (Integrated Starter Generator) motor, wherein the CVT hydraulic system is used for implementing the clamping force control and the speed radio control; the external hydraulic system is connected with the CVT hydraulic system and is used for carrying out external hydraulic control; the HCU is electrically connected with the external hydraulic system and is used for detecting a state of the external hydraulic system and carrying out finished automobile operation control; and the ISG motor is electrically connected with the external hydraulic system and the HCU and is controlled by the HCU. The external hydraulic system is used as an external pressure supplementing device in the initial stage of starting under the pure electrical working condition, in the integral pressurizing and pressure releasing process, a switching control valve is controlled by the HCU to be opened and closed so as to complete the storage and release of hydraulic energy and implement the working pressure required by the CVT hydraulic system; and according to the system, the ISG motor is used as a hydraulic power source, so that the starting under the pure electrical working condition of a hybrid CVT sedan is implemented.
Description
Technical field
The present invention relates to strong hybrid electric vehicle dynamic assembly constructing technology field, in particular, relate to a kind of hybrid vehicle Hydraulic system and control method.
Background technology
Along with popularizing of hybrid vehicle, the all functions of the hybrid power systems such as strong hybrid electric vehicle has idling start and stop, pure motor driving, parallel drive, the middle start the engine of advancing, braking energy recovery, can improve the whole vehicle power performance and the economy performance by the switching between the various patterns, namely creeping or during low speed driving when automobile, adopting pure motorized motions and kill engine to reduce oil consumption; When the pure motor-operated running state of vehicle turned to acceleration or climbing, motor can't provide and satisfy automobile acceleration or the needed propulsive effort of climbing, and needs start the engine jointly to drive.
CVT(Continuously Variable Transmission, toric transmission), mainly formed by band wheels, metal tape, shift clutch etc., see also accompanying drawing 1, be traditional C VT structural representation (containing turbine transformer).In transmission process, by pitch radius continually varying principal and subordinate movable belt pulley moving up and down on cone dish axle, the V-type groove that metal tape is consisted of along two belt wheels is done and is radially slided, and realizes the continuous variation of transmitting ratio.Because the CVT transmitting ratio can change continuously, therefore carrying CVT in the strong hybrid electric car can realize optimum matching between driving engine, motor and the change-speed box three according to the intention of chaufeur, further improves fuel economy, dynamic property, road-holding property and the travelling comfort of strong hybrid electric vehicle.
For being provided with apparatus for starting in the traditional C VT automobile, such as start clutch, turbine transformer.Engine flywheel is connected with CVT internal mechanical pump by intermediary agency's (such as face of fluid torque converter).At the Vehicle Starting Process initial stage, engine idle work can drive CVT internal mechanical pump and provide operating fluid for the CVT hydraulic efficiency pressure system, is used for satisfying the needs in Vehicle Starting Process CVT belt wheel oil cylinder requirements of one's work and the adjusting of CVT speed ratio.In addition, because driving engine directly links to each other with CVT in the traditional C VT automobile, when vehicle start, driving engine has been in idling mode, driving engine can drive CVT internal mechanical pump, for the CVT hydraulic efficiency pressure system provides enough operating fluids, be used for satisfying the needs in Vehicle Starting Process CVT belt wheel oil cylinder requirements of one's work and the adjusting of CVT speed ratio.But, in order to realize the pure electronic operating mode of vehicle, need between transmitting set and CVT, increase electromechanical coupling mechanism, see also accompanying drawing 2, be strong hybrid electric CVT car drivetrain system agent structure schematic diagram.Hybrid power system is made of a driving engine, an ISG motor, a power-transfer clutch and a CVT, the ISG rotor links to each other with CVT internal mechanical pump, ISG rotor and mechanical pump are formed be rigidly connected, the ISG rotor rotates, and then drives CVT internal mechanical pump work.When the pure electronic operating mode starting of strong hybrid electric CVT car, engine speed is that 0, ISG motor speed is risen gradually by 0 beginning.Bring thus a difficult problem, strong hybrid electric CVT car is at the pure electronic starting initial stage, the ISG motor speed is lower, its rotating speed is not enough to drive CVT internal mechanical pump and exports enough operating fluids, be used for satisfying the needs in Vehicle Starting Process CVT belt wheel oil cylinder requirements of one's work and the adjusting of CVT speed ratio, therefore, strong hybrid electric CVT car can't be started to walk under pure electronic operating mode.
In order to reach above-mentioned functions, common design is to increase a motor-drive pump in system, when the ISG motor speed by 0 beginning, rotating speed is low when being not enough to drive CVT internal mechanical pump work, motor-drive pump is the voltage supply of CVT hydraulic efficiency pressure system.At present on the market existing motor-drive pump not only expensive, volume is larger, and, larger problem is also arranged on serviceability, for example: the motor feels hot that power is larger for motor-drive pump, the inefficiency that causes motor-drive pump, and can not long time continuous working, service life is shorter.Therefore motor-drive pump can only as the auxiliary power pump, be worked at short notice.So just cause two pumps of hydraulic efficiency pressure system needs, motor-drive pump and mechanical pump, thus increased complexity, the cost of hydraulic efficiency pressure system, and the difficulty of arrangement.
Therefore, provide a kind of under pure electronic operating mode, use CVT internal mechanical pump as single hydraulic power source, driving engine is not worked, motor speed is since 0, motor can't drive CVT internal mechanical pump and regulate for the oil cylinder work of CVT belt wheel and CVT speed ratio and provide in the situation of hydraulic pressure, solves the problem that hybrid power CVT car can't be started to walk, and is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of hybrid vehicle Hydraulic system and control method, to overcome in the prior art because under pure electronic operating mode, use in the situation of CVT internal mechanical pump as single hydraulic power source, driving engine is not worked, motor speed is since 0, and motor can't drive CVT internal mechanical pump and regulate for CVT belt wheel oil cylinder work and CVT speed ratio and provide in the situation of hydraulic pressure, can't solve the problem that hybrid power CVT car can't be started to walk.
For achieving the above object, the invention provides following technical scheme:
A kind of hybrid vehicle hydraulic efficiency pressure system is used for realizing pure electronic operating mode starting, and this hydraulic efficiency pressure system comprises:
Realize the CVT hydraulic efficiency pressure system of clamping force control and Transmission Ratio Control;
Link to each other with described CVT hydraulic efficiency pressure system, carry out the external hydraulic system of external hydraulic control;
Be electrically connected the entire car controller HCU that detects described external hydraulic system state and carry out car load operation control with described external hydraulic system;
Be electrically connected with described external hydraulic system and described entire car controller HCU, by the ISG motor of described entire car controller HCU control.
Wherein, described external hydraulic system comprises:
Control oil inlet and return opening sealing and the switching control pilot of opening;
Link to each other with described switching control pilot, carry out the accumulator of storage and the release of hydraulic energy;
Link to each other with described accumulator with described switching control pilot, and be electrically connected with described entire car controller HCU, detect the force value of hydraulic oil in the described accumulator, described force value transfer pressure signal is sent to the pressure sensor of described entire car controller HCU.
Preferably, described switching control pilot is electromagnetic valve, and the electromagnetic coil circuit of described switching control pilot is connected with the control circuit of described entire car controller HCU.
Preferably, described switching control pilot is the two position two-way valve that the magnet control operating spring resets.
Wherein, described CVT hydraulic efficiency pressure system comprises:
Link to each other the CVT internal mechanical pump that hydraulic oil is carried up and down with the ISG rotor of described ISG motor;
Link to each other with described CVT internal mechanical pump, hydraulic oil is carried out the check valve of unidirectional conveying;
Link to each other with described check valve, the CVT main oil way of hydraulic system of hydraulic oil is provided to described external hydraulic system;
Link to each other with described CVT main oil way of hydraulic system with described CVT internal mechanical pump, be used for the CVT oil pan tray that circulation holds hydraulic oil.
Wherein, the signal of described pressure sensor transmits to described entire car controller HCU by signal line.
Preferably, the set oil pump of described CVT main oil way of hydraulic system is described CVT internal mechanical pump, by described ISG drive and control of electric machine.
The present invention also discloses a kind of hybrid vehicle hydraulic control method on the basis of above-mentioned disclosed a kind of hybrid vehicle hydraulic efficiency pressure system, be used for realizing pure electronic operating mode starting, and this hydraulic control method comprises:
Entire car controller HCU is by the force value in the pressure sensor detection accumulator;
Judge that whether described force value is less than preset pressure value;
When detected pressures value during less than described preset pressure value, described entire car controller HCU control ISG machine operation drives CVT internal mechanical pump work, and the energising of master cock control cock, to described accumulator pressurising;
When the detected pressures value was not less than described preset pressure value, described entire car controller HCU control ISG motor quit work, and controlled described switching control pilot and reset;
When described hydraulic control system received the starting signal that described entire car controller HCU sends, the described hydraulic energy that described accumulator stores discharged, and provides operation pressure for described CVT main oil way of hydraulic system under described ISG motor low speed state.
Via above-mentioned technical scheme as can be known, compared with prior art, the invention discloses a kind of hybrid vehicle Hydraulic system and control method, be used for realizing pure electronic operating mode starting, this hydraulic efficiency pressure system comprises: the CVT hydraulic efficiency pressure system that realizes clamping force control and Transmission Ratio Control; Link to each other with described CVT hydraulic efficiency pressure system, carry out the external hydraulic system of external hydraulic control; Be electrically connected the entire car controller HCU that detects described external hydraulic system state and carry out car load operation control with described external hydraulic system; Be electrically connected with described external hydraulic system and described entire car controller HCU, by the ISG motor of described entire car controller HCU control.By external hydraulic system as pure outside compensation device of electronic operating mode starting initial stage, whole filling, the process of bleeding off pressure is to open and seal storage and the release of finishing hydraulic energy by entire car controller HCU master cock control cock, realize the needed operation pressure of CVT hydraulic efficiency pressure system, and system with the ISG motor as hydraulic efficiency power unit, without other additional power systems, realized with CVT internal mechanical pump as single hydraulic power source, driving engine is not worked, motor speed is since 0, driven by motor CVT internal mechanical pump provides the situation of hydraulic pressure for CVT belt wheel oil cylinder work and the adjusting of CVT speed ratio, make the pure electronic operating mode starting of hybrid power CVT car.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing that provides other accompanying drawing.
Fig. 1 is traditional C VT structural representation (containing turbine transformer);
Fig. 2 is strong hybrid electric CVT car drivetrain system agent structure schematic diagram;
Fig. 3 is the disclosed a kind of hybrid vehicle hydraulic system structure schematic diagram of the embodiment of the invention;
Fig. 4 is the disclosed CVT hydraulic system structure of embodiment of the invention schematic diagram;
Fig. 5 is the diagram of circuit of the disclosed a kind of hybrid vehicle hydraulic control method of the embodiment of the invention;
Fig. 6 is the disclosed a kind of hybrid vehicle hydraulic control method strategic process figure of the embodiment of the invention.
The 1-turbine transformer, the 2-shift clutch, 3-metal driving band, 4-is with wheels, the 5-driving engine, 6-electromechanical coupling mechanism, the 61-free-wheel clutch, the 62-ISG motor, the 63-torque limiting clutch, the 64-compression/separation elastic element, the 621-ISG rotor, the 622-ISG motor stator, the 7-CVT hydraulic efficiency pressure system, 71-CVT internal mechanical pump, the 72-check valve, the 73-CVT oil pan tray, the 74-CVT hydraulic circuit, 8-entire car controller HCU, the 9-external hydraulic system, the 91-switching control pilot, the 92-accumulator, the 93-pressure sensor, 101-driving wheel oil cylinder, 102-flower wheel oil cylinder, 103-Transmission Ratio Control valve, 104-clamping force control valve.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The application discloses a kind of hybrid vehicle Hydraulic system and control method, is used for realizing pure electronic operating mode starting, and this hydraulic efficiency pressure system comprises: the CVT hydraulic efficiency pressure system that realizes clamping force control and Transmission Ratio Control; Link to each other with the CVT hydraulic efficiency pressure system, carry out the external hydraulic system of external hydraulic control; Be electrically connected the entire car controller HCU that detects the external hydraulic system state and carry out car load operation control with external hydraulic system; Be electrically connected with external hydraulic system and HCU, by the ISG motor of HCU control.By external hydraulic system as pure outside compensation device of electronic operating mode starting initial stage, wholely fill, the process of bleeding off pressure is to be opened and storage and release to hydraulic energy are finished in sealing by HCU master cock control cock, realize the needed operation pressure of CVT hydraulic efficiency pressure system, and system as hydraulic efficiency power unit, has realized making the pure electronic operating mode starting of hybrid power CVT car with the ISG motor.
See also accompanying drawing 3, be the disclosed a kind of hybrid vehicle hydraulic system structure schematic diagram of the embodiment of the invention.The embodiment of the invention discloses a kind of hybrid vehicle hydraulic efficiency pressure system, be used for realizing pure electronic operating mode starting, this hydraulic efficiency pressure system comprises: the CVT hydraulic efficiency pressure system 7 that realizes clamping force control and Transmission Ratio Control; Link to each other with CVT hydraulic efficiency pressure system 7, carry out the external hydraulic system 9 of external hydraulic control; Be electrically connected the entire car controller HCU8 that detects external hydraulic system 9 states and carry out car load operation control with external hydraulic system 9; Be electrically connected with external hydraulic system 9 and entire car controller HCU8, by the ISG motor 62 of entire car controller HCU8 control.
The ISG rotor 621 of above-mentioned ISG motor 62 links to each other with CVT internal mechanical pump 71, ISG rotor 621 is formed with CVT internal mechanical pump 71 be rigidly connected, and ISG rotor 621 rotates, and then drives 71 work of CVT internal mechanical pump.
Said external hydraulic efficiency pressure system 9 comprises: control oil inlet and return opening sealing and the switching control pilot 91 of opening; Link to each other with switching control pilot 91, carry out the accumulator 92 of storage and the release of hydraulic energy; Link to each other with accumulator 92 with switching control pilot 91, and be electrically connected with entire car controller HCU8, detect the force value of hydraulic oil in the accumulator 92, by the pressure sensor 93 of entire car controller HCU8 control.Energy storage 92 can replenish rapidly CVT hydraulic circuit 74 required pressure at the pure electronic operating mode starting initial stage.When having guaranteed ISG motor 62 slow speed of revolution, CVT hydraulic circuit 74 can work.
The signal of above-mentioned pressure sensor 93 transmits to described entire car controller HCU8 by signal line.Detect the force value of hydraulic oil by pressure sensor 93.After reaching setup pressure value, 91 sealings of entire car controller HCU8 master cock control cock rely on energy storage 92 storage hydraulic energies, realize pressurize.When in a single day the hydraulic fluid pressure value drops to the lower limit value, 62 work of entire car controller HCU8 control ISG motor, thus driving 71 work of CVT internal mechanical pump, Simultaneous Switching control cock 91 is opened energy storage 92 pressurisings.Described hydraulic circuit 74 set oil pumps are described CVT internal mechanical pump 71, by described ISG motor-driven.
Above-mentioned CVT hydraulic efficiency pressure system 7 comprises: link to each other the CVT internal mechanical pump 71 that hydraulic oil is carried up and down with the ISG rotor 621 of ISG motor 62; Link to each other with CVT internal mechanical pump 71, hydraulic oil is carried out the check valve 72 of unidirectional conveying; Link to each other with check valve 72, the CVT hydraulic circuit 74 of hydraulic oil is provided to external hydraulic system 9; Link to each other with CVT hydraulic circuit 74 with CVT internal mechanical pump 71, be used for the CVT oil pan tray 73 that circulation holds hydraulic oil.Hydraulic oil by CVT internal mechanical pump 71, offers whole hydraulic efficiency pressure system through check valve 72 by CVT oil pan tray 73.
The pure electronic operating mode starting-up process of strong hybrid electric CVT car sends instruction by entire car controller HCU8 and controls, and in starting-up process, at first should make energy storage 92 storage oil pressure; During starting, energy storage 92 bleeds off pressure rapidly; At last, vehicle start.
The present invention adopts energy storage 92 as pure electronic outside compensation device of operating mode starting initial stage, wholely fill, the process of bleeding off pressure be by entire car controller HCU 8 master cock control cock 91 open, sealing finishes.Externally be provided with the mechanism of storage hydraulic energy in the hydraulic efficiency pressure system 9, hydraulic energy can be stored into certain pressure, when starting, can provide rapidly the CVT hydraulic circuit 74 required pressure.Also be provided with the pressure of the mechanism of pressure sensor 93 detection of stored hydraulic energies, after pressure reaches setting value, switching control pilot 93 sealings; When insufficient pressure, switching control pilot 93 is opened.
The technical solution used in the present invention is: as shown in Figure 3, the pure electronic operating mode starting external hydraulic system of this strong hybrid electric CVT car that provides, described external hydraulic system is provided with a switching control pilot 91, and CVT main oil way of hydraulic system 74 is communicated with energy storage 92.
CVT hydraulic efficiency pressure system 7 described above is mainly used in realizing clamping force control and Transmission Ratio Control.As shown in Figure 4, its working process is: the pressure of mechanical pump outlet is regulated by clamping force control valve 104, directly acts on flower wheel oil cylinder 102, with the tensile force of control to metal driving band 3; Another part pressure oil enters into driving wheel oil cylinder 101 through the adjusting of Transmission Ratio Control valve 103, with the variation of control CVT transmission speed ratio.
Preferably, on the basis of technique scheme, described switching control pilot 91 can be electromagnetic valve, and the circuit of its magnet coil is connected with the control circuit of described entire car controller HCU 8.
Adopt the mechanism of electromagnetic valve, make valve can be connected and accept its control with entire car controller HCU 8, realize necessary operation.Its control program is general prepared in advance good, is stored among the entire car controller HCU 8.
Preferably, described switching control pilot 91 two position two-way valve that can reset for the magnet control operating spring.During the electromagnet no power, spring reset, oil inlet and return opening sealing, feasible system pressure keeps; During the electromagnet energising, spring-compressed, oil inlet is to the return opening bidirectional opening.
Further, the present invention integrates CVT hydraulic efficiency pressure system, strong hybrid electric electromechanical coupling hydraulic efficiency pressure system, saves arrangement space, and the present invention controls simply, easily realizes and liquid can repeated usage, the ISG motor is used as hydraulic efficiency power unit, without other additional power systems.
The invention discloses a kind of hybrid vehicle hydraulic efficiency pressure system, be used for realizing pure electronic operating mode starting, this hydraulic efficiency pressure system comprises: the CVT hydraulic efficiency pressure system that realizes clamping force control and Transmission Ratio Control; Link to each other with described CVT hydraulic efficiency pressure system, carry out the external hydraulic system of external hydraulic control; Be electrically connected the entire car controller HCU that detects described external hydraulic system state and carry out car load operation control with described external hydraulic system; Be electrically connected with described external hydraulic system and described entire car controller HCU, by the ISG motor of described entire car controller HCU control.By external hydraulic system as pure outside compensation device of electronic operating mode starting initial stage, whole filling, the process of bleeding off pressure is to open and seal storage and the release of finishing hydraulic energy by entire car controller HCU master cock control cock, realize the needed operation pressure of CVT hydraulic efficiency pressure system, and system with the ISG motor as hydraulic efficiency power unit, without other additional power systems, realized with CVT internal mechanical pump as single hydraulic power source, driving engine is not worked, motor speed is since 0, driven by motor CVT internal mechanical pump provides the situation of hydraulic pressure for CVT belt wheel oil cylinder work and the adjusting of CVT speed ratio, make the pure electronic operating mode starting of hybrid power CVT car.
On the basis of the disclosed embodiment of the invention described above, in order to realize the purpose identical with technique scheme, the present invention also provides the control method of the pure electronic operating mode starting of the above strong hybrid electric CVT car, see also accompanying drawing 5, be the diagram of circuit of the disclosed a kind of hybrid vehicle hydraulic control method of the embodiment of the invention, concrete technical scheme steps comprises:
Step 501: entire car controller HCU is by the force value in the pressure sensor detection accumulator.
Step 502: judge that whether described force value is less than preset pressure value.
Step 503: when detected pressures value during less than described preset pressure value, described entire car controller HCU control ISG machine operation drives CVT internal mechanical pump work, and the energising of master cock control cock, to described accumulator pressurising.
Step 504: when the detected pressures value was not less than described preset pressure value, described entire car controller HCU control ISG motor quit work, and controlled described switching control pilot and reset.
Step 505: when described hydraulic control system receives the starting signal that described entire car controller HCU sends, the described hydraulic energy that described accumulator stores discharges, and provides operation pressure for described CVT main oil way of hydraulic system under described ISG motor low speed state.
A kind of hybrid vehicle hydraulic control method disclosed by the invention, by external hydraulic system as pure outside compensation device of electronic operating mode starting initial stage, wholely fill, the process of bleeding off pressure is to be opened and storage and release to hydraulic energy are finished in sealing by HCU master cock control cock, realize the needed operation pressure of CVT hydraulic efficiency pressure system, and system as hydraulic efficiency power unit, has realized making the pure electronic operating mode starting of hybrid power CVT car with the ISG motor.
Further, see also accompanying drawing 6, concrete workflow and hydraulic pressure transfer realizing route are: before the vehicle start, car key is positioned on gear car load and powers on, entire car controller HCU 8 judges SOC〉setting value (SOC is the electrokinetic cell electric weight), vehicle enters pure electronic operating mode starting.Entire car controller HCU8 detects the force value of energy storage 92 by pressure sensor 93.When force value less than default definite value A(such as 3MPa) time, 62 work of entire car controller HCU8 control ISG motor, thereby drive 71 work of CVT internal mechanical pump, simultaneously entire car controller HCU8 master cock control cock 91 energisings, make it be in the spring-compressed state, advance, return opening opens energy storage 92 pressurisings; When force value equals setting value A(such as 3MPa) time, entire car controller HCU8 master cock control cock 91 outage makes it be in the spring reset state, advances, the return opening sealing energy storage 92 storage liquid pressure energies.Entire car controller HCU8 control ISG motor 62 quits work, and waits for the vehicle start signal.The hydraulic pressure transfer path is achieved in that hydraulic pressure enters the energy storage 92 by CVT internal mechanical pump 71, check valve 72, switching control pilot 91 from CVT oil pan tray 73.
During vehicle start, car key is positioned at the start gear, gear is in D gear (forward gear) or R gear (backward gear), 91 energisings of entire car controller HCU8 master cock control cock, make it be in the spring-compressed state, advance, return opening opens, energy storage 92 discharges rapidly hydraulic pressure, jointly for CVT hydraulic circuit 74 provides hydraulic pressure, be used for CVT power-transfer clutch joint, belt wheel clamping, system's lubrication etc. as main oil sources and CVT internal mechanical pump 71; Then RELEASE PARKINGBRAKE, the pedal that gets off the brakes, stepping on accelerator pedal, ISG motor 62 is started working, vehicle start.The hydraulic pressure transfer path is achieved in that wherein one road hydraulic pressure enters CVT hydraulic circuit 74 from energy storage 92 by switching control pilot 91; Another road hydraulic pressure enters CVT hydraulic circuit 74 from CVT oil pan tray 73 by CVT internal mechanical pump 71, check valve 72.
When vehicle had of short duration stopping in the process of moving, ISG motor 62 quit work, and CVT internal mechanical pump 71 is not worked, energy storage 92 storage liquid pressure energies.When vehicle need to be started to walk again, RELEASE PARKINGBRAKE, pedal gets off the brakes, stepping on accelerator pedal, ISG motor 62 restarts work, simultaneously entire car controller HCU8 master cock control cock 91 energisings, make it be in the spring-compressed state, advance, return opening opens, energy storage 92 discharges rapidly hydraulic pressure, jointly provides hydraulic pressure for CVT hydraulic circuit 74 as main oil sources and CVT internal mechanical pump 71, be used for CVT power-transfer clutch joint, belt wheel clamping, system's lubrication etc., vehicle start.The hydraulic pressure transfer path is achieved in that wherein one road hydraulic pressure enters CVT hydraulic circuit 74 from energy storage 92 by switching control pilot 91; Another road hydraulic pressure enters CVT hydraulic circuit 74 from CVT internal mechanical pump 71 by check valve 72.
Behind the vehicle start, ISG motor 62 normal operation drives CVT internal mechanical pump 71 and pumps hydraulic oil from CVT oil pan tray 73, not only be 74 voltage supply of CVT hydraulic circuit but also be energy storage 92 pressurisings.Entire car controller HCU8 detects energy storages 92 pressure by pressure sensor 93, when pressure less than setting value A(such as 3MPa) time, 91 energisings of entire car controller HCU8 master cock control cock are in the spring-compressed state, advance, return opening opens energy storage 92 pressurisings; When force value equals setting value A(such as 3MPa) time, entire car controller HCU8 master cock control cock 91 outage is in the spring reset state, advances, the return opening sealing energy storage 92 storage liquid pressure energies.The hydraulic pressure transfer path is achieved in that hydraulic pressure is from CVT oil pan tray 73 process CVT internal mechanical pumps 71, check valve 72, then be divided into two-way, the switching control pilot 91 of wherein leading up to enters in the energy storage 92, and another road directly enters in the CVT hydraulic circuit 74.
Vehicle in the process of moving, whether entire car controller HCU8 can be constantly detects energy storages 92 pressure by pressure sensor 93 reach setting value A(such as 3MPa).If equal A(such as 3MPa), then entire car controller HCU8 master cock control cock 91 outage is in the spring reset state, advances, the return opening sealing, and energy storage 92 need not pressurising.If less than B(such as 2.5MPa), then entire car controller HCU8 master cock control cock 91 energisings, be in the spring-compressed state, advance, return opening opens, when ISG motor 62 drives CVT internal mechanical pump 71, be energy storage 92 pressurisings, be A(such as 3MPa until pressure sensor 93 detects force value), then entire car controller HCU8 master cock control cock 91 outages are in the spring reset state, advance, return opening sealing, energy storage 92 storage hydraulic energies.The hydraulic pressure transfer path is achieved in that wherein one road hydraulic pressure enters the energy storage 92 by CVT internal mechanical pump 71, check valve 72, switching control pilot 91 from CVT oil pan tray 73; Another road hydraulic pressure enters the CVT hydraulic circuit 74 by CVT internal mechanical pump 71, check valve 72 from CVT oil pan tray 73.
In sum: the invention discloses a kind of hybrid vehicle Hydraulic system and control method, be used for realizing pure electronic operating mode starting, this hydraulic efficiency pressure system comprises: the CVT hydraulic efficiency pressure system that realizes clamping force control and Transmission Ratio Control; Link to each other with described CVT hydraulic efficiency pressure system, carry out the external hydraulic system of external hydraulic control; Be electrically connected the entire car controller HCU that detects described external hydraulic system state and carry out car load operation control with described external hydraulic system; Be electrically connected with described external hydraulic system and described entire car controller HCU, by the ISG motor of described entire car controller HCU control.By external hydraulic system as pure outside compensation device of electronic operating mode starting initial stage, whole filling, the process of bleeding off pressure is to open and seal storage and the release of finishing hydraulic energy by entire car controller HCU master cock control cock, realize the needed operation pressure of CVT hydraulic efficiency pressure system, and system with the ISG motor as hydraulic efficiency power unit, without other additional power systems, realized with CVT internal mechanical pump as single hydraulic power source, driving engine is not worked, motor speed is since 0, driven by motor CVT internal mechanical pump provides the situation of hydraulic pressure for CVT belt wheel oil cylinder work and the adjusting of CVT speed ratio, make the pure electronic operating mode starting of hybrid power CVT car.
In addition, the present invention is equally applicable to carry AT, DCT etc. when vehicle start, need to set up in advance the pure electronic starting operating mode of motor vehicle driven by mixed power of hydraulic system pressure.
Each embodiment adopts the system of going forward one by one to describe in this specification sheets, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed method of embodiment, because it is corresponding with the disclosed system of embodiment, so description is fairly simple, relevant part gets final product referring to the components of system as directed explanation.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, in other embodiments realization.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a hybrid vehicle hydraulic efficiency pressure system is used for realizing pure electronic operating mode starting, it is characterized in that, this hydraulic efficiency pressure system comprises:
Realize the CVT hydraulic efficiency pressure system of clamping force control and Transmission Ratio Control;
Link to each other with described CVT hydraulic efficiency pressure system, carry out the external hydraulic system of external hydraulic control;
Be electrically connected the entire car controller HCU that detects described external hydraulic system state and carry out car load operation control with described external hydraulic system;
Be electrically connected with described external hydraulic system and described entire car controller HCU, by the ISG motor of described entire car controller HCU control.
2. hydraulic efficiency pressure system according to claim 1 is characterized in that, described external hydraulic system comprises:
Control oil inlet and return opening sealing and the switching control pilot of opening;
Link to each other with described switching control pilot, carry out the accumulator of storage and the release of hydraulic energy;
Link to each other with described accumulator with described switching control pilot, and be electrically connected with described entire car controller HCU, detect the force value of hydraulic oil in the described accumulator, described force value transfer pressure signal is sent to the pressure sensor of described entire car controller HCU.
3. hydraulic efficiency pressure system according to claim 2 is characterized in that, described switching control pilot is electromagnetic valve, and the electromagnetic coil circuit of described switching control pilot is connected with the control circuit of described entire car controller HCU.
4. hydraulic efficiency pressure system according to claim 2 is characterized in that, described switching control pilot is the two position two-way valve that the magnet control operating spring resets.
5. hydraulic efficiency pressure system according to claim 1 is characterized in that, described CVT hydraulic efficiency pressure system comprises:
Link to each other the CVT internal mechanical pump that hydraulic oil is carried up and down with the ISG rotor of described ISG motor;
Link to each other with described CVT internal mechanical pump, hydraulic oil is carried out the check valve of unidirectional conveying;
Link to each other with described check valve, the CVT main oil way of hydraulic system of hydraulic oil is provided to described external hydraulic system;
Link to each other with described CVT main oil way of hydraulic system with described CVT internal mechanical pump, be used for the CVT oil pan tray that circulation holds hydraulic oil.
6. hydraulic efficiency pressure system according to claim 2 is characterized in that, the signal of described pressure sensor transmits to described entire car controller HCU by signal line.
7. hydraulic efficiency pressure system according to claim 5 is characterized in that, the set oil pump of described CVT main oil way of hydraulic system is described CVT internal mechanical pump, by described ISG drive and control of electric machine.
8. a hybrid vehicle hydraulic control method is used for realizing pure electronic operating mode starting, it is characterized in that, this hydraulic control method comprises:
Entire car controller HCU is by the force value in the pressure sensor detection accumulator;
Judge that whether described force value is less than preset pressure value;
When detected pressures value during less than described preset pressure value, described entire car controller HCU control ISG machine operation drives CVT internal mechanical pump work, and the energising of master cock control cock, to described accumulator pressurising;
When the detected pressures value was not less than described preset pressure value, described entire car controller HCU control ISG motor quit work, and controlled described switching control pilot and reset;
When described hydraulic control system received the starting signal that described entire car controller HCU sends, the described hydraulic energy that described accumulator stores discharged, and provides operation pressure for described CVT main oil way of hydraulic system under described ISG motor low speed state.
Priority Applications (1)
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| CN103382974A (en) * | 2013-07-25 | 2013-11-06 | 重庆长安汽车股份有限公司 | CVT car moment limiting clutch hydraulic system and control method thereof |
| CN104085393A (en) * | 2014-07-04 | 2014-10-08 | 重庆长安汽车股份有限公司 | Strong hybrid electric vehicle all-electric starting control method |
| CN104228541A (en) * | 2014-09-28 | 2014-12-24 | 上海羽翼船舶设备有限公司 | Hydraulic hybrid power device of heavy vehicle |
| CN104481959A (en) * | 2014-12-26 | 2015-04-01 | 中国北方车辆研究所 | Hydraulic system capable of lowering hydraulic oil source startup frequency of AMT (Automated Mechanical Transmission) |
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| CN104481959B (en) * | 2014-12-26 | 2017-02-22 | 中国北方车辆研究所 | Hydraulic system capable of lowering hydraulic oil source startup frequency of AMT (Automated Mechanical Transmission) |
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| CN102910063B (en) | 2016-02-03 |
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Effective date of registration: 20200113 Address after: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Patentee after: Chongqing Chang'an Automobile Co., Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Co-patentee before: Chongqing Chang'an New Energy Automobile Co., Ltd. Patentee before: Chongqing Chang'an Automobile Co., Ltd. |