CN102514570B - A kind of series hybrid electric vehicle and driving engine on off control method, system - Google Patents
A kind of series hybrid electric vehicle and driving engine on off control method, system Download PDFInfo
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- CN102514570B CN102514570B CN201110455402.7A CN201110455402A CN102514570B CN 102514570 B CN102514570 B CN 102514570B CN 201110455402 A CN201110455402 A CN 201110455402A CN 102514570 B CN102514570 B CN 102514570B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention discloses a kind of driving engine on off control method, comprises step: the SOC value 1) detecting battery in real time, the delivery quality of driving engine, and the operational factor of driving engine; 2) judge whether driving engine is in stopped status, if so, enters step 3); If not, enter step 4); 3) judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs, if so, enters step 5); If not, enter step 8); 4) judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs, if so, enters step 6); If not, enter step 8); 5) start the engine; 6) rotating speed of driving engine is down to idling, and keeps engine idling operation in the first predetermined amount of time; 7) driving engine is stopped; 8) current state of driving engine is maintained.It improves the functional reliability of driving engine.The present invention also discloses a kind of driving engine start-stop control system, series hybrid electric vehicle.
Description
Technical field
The present invention relates to technical field of engines, particularly relate to a kind of driving engine on off control method for series hybrid electric vehicle and control system.In addition, the invention still further relates to a kind of series hybrid electric vehicle comprising above-mentioned driving engine start-stop control system.
Background technology
Hybrid vehicle refers to automobile car being equipped with two or more propulsion source (driving engine and storage battery).Hybrid vehicle can be divided into series hybrid electric vehicle, parallel type hybrid vehicle and series parallel hybrid power car three major types according to its power transmission route.
The dynamic assembly of series hybrid electric vehicle by driving engine, electrical generator and electrical motor three partial power form, connect with series system between them, engine driven generators generates electricity, and electric energy is transported to battery or electrical motor by controller, drives automobile by electrical motor by speed-changing mechanism.By battery driven motor during Smaller load, then by wheel driving motor; By driven by engine electrical power generators during large load, and then driving motor, then by wheel driving motor.
Tandem power is applicable to the operating condition of frequent starting and low speed driving in city, such as, usually for city bus.The power of city bus comprises driving engine and storage battery, because city bus start and stop are frequent, its power also frequent variations needed, therefore, how controlling driving engine makes it realize automatic start-stop according to battery electric quantity and vehicle driving-cycle, both having ensured that driving engine responded fast, and can play again the effect of energy-saving and emission-reduction, is vital problem in series hybrid electric vehicle.
Please refer to Fig. 1, Fig. 1 is the FB(flow block) of the driving engine on off control method of series hybrid electric vehicle of the prior art; Briefly introduce the defect existed in the working process of this control method below.
As shown in Figure 1, this driving engine on off control method mainly comprises the steps:
S1 ': SOC (state of capacity, the i.e. residual capacity state) value of Real-time Obtaining battery, the delivery quality of driving engine and engine operating condition parameter;
S2 ': judge whether driving engine is in stopped status, if so, enters step S3 '; If not, enter step S4 ';
S3 ': judge if so, to enter step S5 ' by the energy that the SOC value whether SOC value of battery is less than minimum predetermined value or battery needs when whether being less than Current vehicle Acceleration of starting; If not, enter step S7 ';
S4 ': judge whether the SOC value of battery is greater than maximum predetermined value and is greater than the energy that Current vehicle normally travels needs, if so, enters step S6 '; If not, enter step S7 ';
S5 ': start the engine;
S6 ': stop driving engine;
S7 ': the current state maintaining driving engine.
Adopt in this way, can realize opening driving engine when the dump energy of battery can not meet the operation needs of Current vehicle, stop driving engine, to reach the effect of energy-saving and emission-reduction when the dump energy of battery can meet the operation needs of Current vehicle.
But, after adopting above-mentioned control method, as shown in Figure 2, the time m-speed diagram of the start-up mode that this figure is the control method shown in Fig. 1; Driving engine adopts starter motor to drag engine starting when starting, keep after starting slowly running, when needs improve engine speed, throttle must be stepped on downwards by chaufeur, after fuel distributes by throttle in proportion, fuel could be sprayed and burn, the rotating speed of driving engine is promoted to working speed by low speed, this makes the response of driving engine comparatively slow, can not reach the effect of response fast.In addition, as shown in Figure 3, the time m-speed diagram of this figure shutdown mode that is the control method shown in Fig. 1; Above-mentioned control method often stops driving engine when high engine speeds is rotated, a large amount of heat energy that now driving engine of high speed rotating produces cannot disseminate, cause frequent overheated impaired, the overheated variable color of booster turbine axle head of the friction pair of driving engine and carbon deposit is serious, the functional reliability of driving engine is lower.
In view of this, urgently for above-mentioned technical matters, further optimal design is done to existing driving engine on off control method, makes driving engine in start-up course, have good fast-response, can dispel the heat preferably in stopped process again, improve the functional reliability of driving engine.
Summary of the invention
The technical problem to be solved in the present invention is for providing a kind of driving engine on off control method for series hybrid electric vehicle and control system, make driving engine in start-up course, have good fast-response, good thermal diffusivity can be had in stopped process again, improve the functional reliability of driving engine.Another technical matters that the present invention will solve is for providing a kind of series hybrid electric vehicle comprising above-mentioned driving engine start-stop control system.
For solving the problems of the technologies described above, the invention provides a kind of driving engine on off control method for series hybrid electric vehicle, comprising the steps:
1) SOC value of the battery of described series hybrid electric vehicle is detected in real time, the delivery quality of driving engine, and the current operating parameter of driving engine;
2) judge whether described driving engine is in stopped status, if so, enters step 3); If not, enter step 4);
3) judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs, if so, enters step 5); If not, enter step 8);
4) judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs, if so, enters step 6); If not, enter step 8);
5) start the engine;
6) rotating speed of driving engine is down to idling, and keeps described engine idling operation in the first predetermined amount of time;
7) driving engine is stopped;
8) current state of driving engine is maintained.
Preferably, described step 5) also comprise step afterwards:
9) adopt CAN to export control signal, increase the rotating speed of described driving engine, make the rotating speed of described driving engine be promoted to working speed in the second predetermined amount of time.
Preferably, described step 3) be specially:
Judge whether the SOC value of described battery is less than minimum predetermined value, if so, enters step 5); If not, enter step 8).
Preferably, described step 3) be specially:
Judge whether the SOC value of described battery is less than the energy of Current vehicle Acceleration of starting needs, if so, enters step 5); If not, enter step 8).
Preferably, described step 4) be specially:
Judge whether the SOC value of described battery is greater than maximum predetermined value, and be greater than the energy of normal vehicle operation needs, if so, enter step 6); If not, enter step 8).
Preferably, described step 1) in, by detecting the delivery quality of the position of the Das Gaspedal of described series hybrid electric vehicle, the position acquisition driving engine of brake pedal.
Preferably, described step 1) in, the current operating parameter of described driving engine specifically comprises: the rotating speed of driving engine, water temperature, rate of load condensate.
Adopt above-mentioned on off control method; namely after judging that under current state, driving engine meets halt condition; first the rotating speed of driving engine is down to idling; and keep engine idling operation a period of time; the heat that during this period of time high engine speeds running produces can be disseminated; reduce the temperature of engine friction pair, and then enter step S7 stopping driving engine.Compared to existing technology, this driving engine on off control method avoids driving engine in stopped process, causes engine friction secondary overheated and impaired because heat cannot disseminate, or booster turbine axle head, due to the overheated and phenomenon such as cause variable color, carbon deposit serious, substantially increases the functional reliability of driving engine.
In another kind of detailed description of the invention, after start the engine, then adopt CAN to export control signal, increase the rotating speed of driving engine, make the rotating speed of driving engine be promoted to working speed in the second predetermined amount of time.Like this, make the rotating speed of driving engine increase to working speed rapidly, adopt the mode that foot throttle raises speed compared to existing technology, greatly accelerate the response of driving engine, make driving engine in start-up course, have higher fast-response.
The present invention also provides a kind of driving engine start-stop control system for series hybrid electric vehicle, comprising: detecting device and controller;
Described detecting device, for detecting the SOC value of the battery of described series hybrid electric vehicle in real time, the delivery quality of driving engine, and the current operating parameter of driving engine;
Described controller comprises:
Judging unit, is located at the mouth of described detecting device, for judging whether described driving engine is in stopped status; Further, when described driving engine is shut down, judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs; When described engine starting, judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs;
Signal output unit, is located at the mouth of described judging unit, for being in stopped status when described driving engine, and when the SOC value of battery is less than the least energy of Current vehicle operation needs, exports control signal start the engine; When described driving engine is in starting state, and when the SOC value of battery is greater than the ceiling capacity of Current vehicle operation needs, exports control signal, the rotating speed of driving engine is down to idling, and described engine idling operation is kept in the first predetermined amount of time, then stop driving engine.
Preferably, described signal output unit also for after the described driving engine of startup, adopts CAN to export control signal, increases the rotating speed of described driving engine, make the rotating speed of described driving engine be promoted to working speed in the second predetermined amount of time.
The present invention also provides a kind of series hybrid electric vehicle, comprises battery and driving engine; Also comprise driving engine start-stop control system as above.
Because above-mentioned on off control method has above-mentioned technique effect, therefore, the start-stop control system corresponding with this on off control method, and the series hybrid electric vehicle comprising this start-stop control system also should have corresponding technique effect, does not repeat them here.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the driving engine on off control method of series hybrid electric vehicle of the prior art;
The time m-speed diagram of the start-up mode that Fig. 2 is the control method shown in Fig. 1;
The time m-speed diagram of the shutdown mode that Fig. 3 is the control method shown in Fig. 1;
Fig. 4 is the FB(flow block) of a kind of detailed description of the invention of the driving engine on off control method for series hybrid electric vehicle provided by the present invention;
The time m-speed diagram of the start-up mode that Fig. 5 is the control method shown in Fig. 4;
The time m-speed diagram of the shutdown mode that Fig. 6 is the control method shown in Fig. 4;
Fig. 7 is the structural representation of a kind of detailed description of the invention of the driving engine start-stop control system for series hybrid electric vehicle provided by the present invention.
Detailed description of the invention
Core of the present invention is for providing a kind of driving engine on off control method for series hybrid electric vehicle and control system, make driving engine in stopped process, have good thermal diffusivity, improve the functional reliability of driving engine, and there is good fast-response in start-up course.Another core of the present invention is for providing a kind of series hybrid electric vehicle comprising above-mentioned driving engine start-stop control system.
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 4, Fig. 4 is the FB(flow block) of a kind of detailed description of the invention of the driving engine on off control method for series hybrid electric vehicle provided by the present invention.
In a kind of detailed description of the invention, as shown in Figure 4, a kind of driving engine on off control method for series hybrid electric vehicle provided by the present invention, mainly comprises the steps:
S1: the SOC value detecting the battery of series hybrid electric vehicle in real time, the delivery quality of driving engine, and the current operating parameter of driving engine;
S2: judge whether driving engine is in stopped status, if so, enters step S3; If not, enter step S4;
S3: judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs, if so, enters step S5; If not, enter step S8;
S4: judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs, if so, enters step S6; If not, enter step S8;
S5: start the engine;
S6: the rotating speed of driving engine is down to idling, and engine idling operation is kept in the first predetermined amount of time;
S7: stop driving engine;
S8: the current state maintaining driving engine.
Adopt above-mentioned on off control method, as shown in Figure 6, the time m-speed diagram of the shutdown mode that this figure is the control method shown in Fig. 4; Step S6 is after judging that under current state, driving engine meets halt condition; first the rotating speed of driving engine is down to idling; and keep engine idling operation a period of time; the heat that during this period of time high engine speeds running produces can be disseminated; reduce the temperature of engine friction pair, and then enter step S7 stopping driving engine.The control method of directly shutting down when high engine speeds operates compared to existing technology; this driving engine on off control method avoids driving engine in stopped process, causes engine friction secondary overheated and impaired because heat cannot disseminate; or booster turbine axle head, due to the overheated and phenomenon such as cause variable color, carbon deposit serious, substantially increases the functional reliability of driving engine.
The concrete start-up course of above-mentioned on off control method can also be set further.
In another kind of detailed description of the invention, as shown in Figure 4, step can also be comprised after above-mentioned steps S5:
S9: adopt CAN to export control signal, increase the rotating speed of driving engine, make the rotating speed of driving engine be promoted to working speed in the second predetermined amount of time.
Adopt this control method, as shown in Figure 5, the time m-speed diagram of the start-up mode that this figure is the control method shown in Fig. 4; Namely after starter motor drags engine starting, CAN is adopted to send electric signal, the rotating speed of driving engine is made to increase to working speed rapidly, the mode that foot throttle raises speed is adopted compared to existing technology, greatly accelerate the response of driving engine, make driving engine in start-up course, have higher fast-response.
Special version, above-mentioned " the first predetermined amount of time " refers to the time period heat that high engine speeds running produces can distributed, and above-mentioned " the second predetermined amount of time " refers to the time period being less than step on the accelerator speed-raising; Said two devices not refers in particular to the regular hour, and such as, above-mentioned " the first predetermined amount of time " can adopt 3 minutes, and above-mentioned " the second predetermined amount of time " can adopt 1 minute.Certainly, also can adopt other time period, user can select according to actual needs voluntarily.
It should be noted that, in above-mentioned detailed description of the invention, not concrete restriction judges whether the SOC value of battery is less than the concrete grammar that Current vehicle runs the least energy of needs, does not also limit and judges whether the SOC value of battery is greater than the concrete grammar that Current vehicle runs the ceiling capacity of needs; In fact, everyly first the rotating speed of driving engine is down to idling and shuts down again before driving engine is shut down, adopt CAN the on off control method of driving engine speed-raising to working speed all to be belonged in protection scope of the present invention after the engine started.
The SOC value judging battery in above-mentioned control method can also be set further and whether be less than the concrete grammar that Current vehicle runs the least energy of needs.
In another kind of detailed description of the invention, the step S3 in above-mentioned control method can be specially: judge whether the SOC value of described battery is less than minimum predetermined value, if so, enters step S5; If not, enter step S8.
Like this, by the current SOC value of battery and simply comparing of minimum predetermined value, can judge that driving engine is the need of startup, thus facilitate the on off control of driving engine, make on off control method have step simple, control feature easily.
In another kind of detailed description of the invention, the step S3 in above-mentioned control method can also be specially: judge whether the SOC value of described battery is less than the energy of Current vehicle Acceleration of starting needs, if so, enters step S5; If not, enter step S8.
Like this, first calculate by the delivery quality of driving engine, the duty parameter of driving engine the energy that Current vehicle Acceleration of starting needs, then by the energy of the SOC value and Current vehicle Acceleration of starting needs that compare battery, thus know that driving engine is the need of startup.This determination methods makes above-mentioned on off control method have the higher feature of accuracy.
Special version, above-mentioned " minimum predetermined value " refers to the minimum predetermined value that battery does not need to charge, such as, can set it to 40% of total electricity of battery; Above-mentioned " maximum predetermined value " refers to the maximum predetermined value not needing to discharge, such as, can set it to 90% of total electricity of battery; Certainly, above-mentioned " minimum predetermined value ", " maximum predetermined value " can also get other numerical value, and user can select voluntarily according to real work situation.
The above-mentioned concrete the mode whether SOC value of battery is greater than the ceiling capacity of Current vehicle operation needs that judges can also be set further.
In another kind of detailed description of the invention, above-mentioned steps S4 can be specially:
Judge whether the SOC value of described battery is greater than maximum predetermined value and is greater than the energy of normal vehicle operation needs, if so, enters step S6; If not, enter step S8.
Adopt in this way, namely require that the current SOC value of battery is not only greater than maximum predetermined value, and the energy that the SOC value of this battery needs when also must be greater than normal vehicle operation, fully ensure that accuracy and the safety of on off control method, further ensure the functional reliability of driving engine on off control process.Certainly, in addition, can also judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs by other means.
In further scheme, can by detecting the position of Das Gaspedal of described series hybrid electric vehicle, the delivery quality of the position acquisition driving engine of brake pedal in above-mentioned steps S1.In this way, the delivery quality of driving engine can be known simply, intuitively, particularly, displacement pickup can be adopted to detect the position of Das Gaspedal, the position of brake pedal, to know the delivery quality of driving engine rapidly and accurately, certainly, the delivery quality of driving engine can also be known by other means.
In another kind of concrete scheme, the current operating parameter of above-mentioned driving engine can specifically comprise: the rotating speed of driving engine, water temperature, rate of load condensate.The operational factor of present engine is known exactly by detecting the rotating speed of driving engine, water temperature and rate of load condensate, thus in conjunction with the delivery quality of above-mentioned driving engine, calculate Current vehicle exactly and run the ceiling capacity and least energy that need, to judge whether the current SOC value of battery can meet Current vehicle and run needs, ensures accuracy and the accuracy rate of on off control method.Certainly, above-mentioned operational factor can also comprise other design parameters.
Special version, above-mentioned driving engine can be specially diesel motor, certainly, also can be specially engine petrol.
Please refer to Fig. 7, Fig. 7 is the structural representation of a kind of detailed description of the invention of the driving engine start-stop control system for series hybrid electric vehicle provided by the present invention.
As shown in Figure 7, the present invention also provides a kind of driving engine start-stop control system for series hybrid electric vehicle, comprising: detecting device and controller;
Described detecting device, for detecting the SOC value of the battery of described series hybrid electric vehicle in real time, the delivery quality of driving engine, and the current operating parameter of driving engine;
Described controller comprises:
Judging unit, is located at the mouth of described detecting device, for judging whether described driving engine is in stopped status; Further, when described driving engine is shut down, judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs; When described engine starting, judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs;
Signal output unit, is located at the mouth of described judging unit, for being in stopped status when described driving engine, and when the SOC value of battery is less than the least energy of Current vehicle operation needs, exports control signal start the engine; When described driving engine is in starting state, and when the SOC value of battery is greater than the ceiling capacity of Current vehicle operation needs, exports control signal, the rotating speed of driving engine is down to idling, and described engine idling operation is kept in the first predetermined amount of time, then stop driving engine.
In another kind of detailed description of the invention, above-mentioned signal output unit is also for after the described driving engine of startup, adopt CAN to export control signal, increase the rotating speed of described driving engine, make the rotating speed of described driving engine be promoted to working speed in the second predetermined amount of time.
In addition, the present invention also provides a kind of series hybrid electric vehicle, comprises battery and driving engine; Also comprise driving engine start-stop control system as above.
Because above-mentioned on off control method has above-mentioned technique effect, therefore, the start-stop control system corresponding with this on off control method, and the series hybrid electric vehicle comprising this start-stop control system also should have corresponding technique effect, does not repeat them here.
Above a kind of series hybrid electric vehicle provided by the present invention and driving engine on off control method thereof, system are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1., for a driving engine on off control method for series hybrid electric vehicle, it is characterized in that, comprise the steps:
1) SOC value of the battery of described series hybrid electric vehicle is detected in real time, the delivery quality of driving engine, and the current operating parameter of driving engine;
2) judge whether described driving engine is in stopped status, if so, enters step 3); If not, enter step 4);
3) judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs, if so, enters step 5); If not, enter step 8);
4) judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs, if so, enters step 6); If not, enter step 8);
5) start the engine;
6) rotating speed of driving engine is down to idling, and keeps described engine idling operation in the first predetermined amount of time, disseminated with the heat enabling high engine speeds running produce, described first preset time period is selected according to actual conditions;
7) driving engine is stopped;
8) current state of driving engine is maintained.
2. the driving engine on off control method for series hybrid electric vehicle according to claim 1, is characterized in that, described step 5) also comprise step afterwards:
9) adopt CAN to export control signal, increase the rotating speed of described driving engine, make the rotating speed of described driving engine be promoted to working speed in the second predetermined amount of time.
3. the driving engine on off control method for series hybrid electric vehicle according to claim 2, is characterized in that, described step 3) be specially:
Judge whether the SOC value of described battery is less than minimum predetermined value, if so, enters step 5); If not, enter step 8).
4. the driving engine on off control method for series hybrid electric vehicle according to claim 2, is characterized in that, described step 3) be specially:
Judge whether the SOC value of described battery is less than the energy of Current vehicle Acceleration of starting needs, if so, enters step 5); If not, enter step 8).
5. the driving engine on off control method for series hybrid electric vehicle according to claim 2, is characterized in that, described step 4) be specially:
Judge whether the SOC value of described battery is greater than maximum predetermined value, and be greater than the energy of normal vehicle operation needs, if so, enter step 6); If not, enter step 8).
6. the driving engine on off control method for series hybrid electric vehicle according to any one of claim 1-5, it is characterized in that, described step 1) in, by detecting the delivery quality of the position of the Das Gaspedal of described series hybrid electric vehicle, the position acquisition driving engine of brake pedal.
7. the driving engine on off control method for series hybrid electric vehicle according to any one of claim 1-5, it is characterized in that, described step 1) in, the current operating parameter of described driving engine specifically comprises: the rotating speed of driving engine, water temperature, rate of load condensate.
8. for a driving engine start-stop control system for series hybrid electric vehicle, it is characterized in that, comprising: detecting device and controller;
Described detecting device, for detecting the SOC value of the battery of described series hybrid electric vehicle in real time, the delivery quality of driving engine, and the current operating parameter of driving engine;
Described controller comprises:
Judging unit, is located at the mouth of described detecting device, for judging whether described driving engine is in stopped status; Further, when described driving engine is shut down, judge whether the SOC value of battery is less than the least energy that Current vehicle runs needs; When described engine starting, judge whether the SOC value of battery is greater than the ceiling capacity that Current vehicle runs needs;
Signal output unit, is located at the mouth of described judging unit, for being in stopped status when described driving engine, and when the SOC value of battery is less than the least energy of Current vehicle operation needs, exports control signal start the engine; When described driving engine is in starting state, and when the SOC value of battery is greater than the ceiling capacity of Current vehicle operation needs, export control signal, the rotating speed of driving engine is down to idling, and described engine idling operation is kept in the first predetermined amount of time, disseminated with the heat enabling high engine speeds running produce, described first preset time period is selected according to actual conditions, then stops driving engine.
9. the driving engine start-stop control system for series hybrid electric vehicle according to claim 8, it is characterized in that, described signal output unit is also for after the described driving engine of startup, CAN is adopted to export control signal, increase the rotating speed of described driving engine, make the rotating speed of described driving engine be promoted to working speed in the second predetermined amount of time.
10. a series hybrid electric vehicle, comprises battery and driving engine; It is characterized in that, also comprise driving engine start-stop control system as claimed in claim 8 or 9.
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