CN101643070A - Control method of cold start of hybrid power system - Google Patents
Control method of cold start of hybrid power system Download PDFInfo
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- CN101643070A CN101643070A CN200910195064A CN200910195064A CN101643070A CN 101643070 A CN101643070 A CN 101643070A CN 200910195064 A CN200910195064 A CN 200910195064A CN 200910195064 A CN200910195064 A CN 200910195064A CN 101643070 A CN101643070 A CN 101643070A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/62—Hybrid vehicles
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Abstract
The invention discloses a control method of cold start of a hybrid power system, wherein, an electric machine participates in starting an engine if the water temperature of the engine is higher than the presupposed threshold value of water temperature, the sate of charge of high pressure battery is higher than the presupposed threshold value of a first sate of charge and the available discharge power of high pressure battery is higher than the presupposed threshold value of a first available discharge power; otherwise, a starter starts the engine solely. The invention adopts the cold-start control method of the hybrid power system to start the engine, and if conditions are allowable, the electrical machine and the starter can be used jointly to start the engine, thereby increasing the torque when the engine starts; moreover, the smaller overshoot of the engine enables that the engine starts more smoothly, which is able to effectively lessen the vibration and noise in the process that the engine starts, decrease emission and oil consumption, reduce pollution and save energy.
Description
Technical field
The present invention relates to a kind of hybrid power system, particularly a kind of control method of cold start of hybrid power system.
Background technology
Along with the worsening shortages of the energy and increasing the weight of day by day of environmental pollution, numerous car production producer all begins to research and develop energetically new-energy automobile.In many new-energy automobile solutions, obtained on a plurality of at home and abroad vehicles of the technical solution of hybrid vehicle using widely.As shown in Figure 1, the start system of driving engine generally all is made up of the A-battery 11 of a starter 12 and a 12V in traditional internal-combustion engine vehicle, by starter 12 full voltage starting driving engines 13.When navigating mate rotated the car key start a car, starter drove turn of engine and makes automobile start.But in the engine starting process, because the overshoot of driving engine is bigger, therefore driving engine often has bigger vibration and noise in starting process, and all bigger in its discharging of the moment of engine starting and oil consumption, is easy to contaminated environment and causes the waste of the energy.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention provides a kind of control method of cold start of hybrid power system, can effectively reduce vibration and noise and emission abatement and the oil consumption of driving engine in starting process by this cold start-up control method.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of control method of cold start of hybrid power system, described hybrid power system comprises motor, driving engine and hybrid power system controller, described motor is connected with described driving engine, described motor is driven by a high-tension battery, described driving engine also is connected with a starter, the available discharge power that the state-of-charge that is higher than default water temperature threshold value and high-tension battery as Engine Coolant Temperature is higher than first default state-of-charge threshold value and high-tension battery is higher than the first default available discharge power threshold value, then motor participates in fire an engine, otherwise by the independent fire an engine of starter.
Preferably, the mode of described motor participation fire an engine is motor and starter common activation driving engine.
Preferably, when motor participates in fire an engine, be lower than the second default state-of-charge threshold value or available discharge power is lower than the second default available discharge power threshold value, then motor and starter common activation driving engine as the state-of-charge of high-tension battery; When being higher than the second default state-of-charge threshold value and available discharge power and being higher than the default second available discharge power threshold value, then by the independent fire an engine of motor as the state-of-charge of high-tension battery.
Further, starter and motor common activation driving engine comprise the steps: that starter output cranking torque drives engine rotation and is higher than the first rotating speed threshold value until engine speed; When engine speed is higher than the first rotating speed threshold value and when being lower than the second rotating speed threshold value, the motor output torque participates in fire an engine; When engine speed reached the second rotating speed threshold value, engine starting was finished, and motor stops output torque.
Beneficial effect of the present invention is: the control method of cold start fire an engine that adopts this hybrid power system to reach, under the situation of conditions permit, can adopt motor and starter common activation driving engine, moment of torsion when having increased engine starting, and the overshoot of driving engine is less, more smooth-going when making engine starting, can effectively reduce vibration and the noise of driving engine in starting process, but and emission abatement and oil consumption, pollution, energy savings reduced.
Description of drawings
Fig. 1 is the structural representation of conventional engines start system.
Fig. 2 is the structural representation of hybrid power system in the embodiment of the invention.
Fig. 3 is the diagram of circuit of control method of cold start in the embodiment of the invention.
Fig. 4 is the diagram of circuit of control method of cold start in another embodiment of the present invention.
Fig. 5 is the method flow diagram when motor and starter common activation driving engine in the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 2, this hybrid power system comprises high-tension battery 7, motor 5, hybrid power system controller 6 and driving engine 3, and motor 5 is connected with driving engine 3, and high-tension battery 7 is connected with motor 5.Driving engine 3 also is connected with starter 2, and starter 2 is connected with a 12V battery 1.Hybrid power system controller 6 can be controlled the open and close of starter 2 and motor 5.Hybrid power system controller 6 can also be gathered the water temperature value and the rotating speed of state-of-charge (SOC) value of this high-tension battery 7, available discharge power value and driving engine, can also be by the running of engine controller 4 control driving engines 3.
As shown in Figure 3, be the diagram of circuit of an embodiment of control method of cold start among the present invention.At first default in an embodiment Engine Coolant Temperature threshold value and the first state-of-charge threshold value of high-tension battery, the first available discharge power threshold value of high-tension battery.Execution in step S104 then, the size of relatively actual Engine Coolant Temperature value and default Engine Coolant Temperature threshold value is higher than the water temperature threshold value as the Engine Coolant Temperature value of reality, then execution in step S106, as be lower than then execution in step S112 of water temperature threshold value, promptly by the independent fire an engine of starter.
In step S106, compare the state-of-charge value of actual high-tension battery and the size of the first state-of-charge threshold value of presetting, state-of-charge value as the high-tension battery of reality is higher than the first state-of-charge threshold value, then enter step S108, as be lower than the first state-of-charge threshold value and then enter step S112, by the independent fire an engine of starter.
In step S108, compare the available discharge power value of actual high-tension battery and the size of the first available discharge power threshold value of presetting, available discharge power value as the high-tension battery of reality is higher than the first available discharge power threshold value, then enter step S110, by starter and motor common activation driving engine; As be lower than the first available discharge power threshold value, then enter step S112, by the independent fire an engine of starter.
In above-mentioned steps S110, the method for driving engine and motor common activation driving engine is at first preset the first rotating speed threshold value and the second rotating speed threshold value as shown in Figure 5, and the second rotating speed threshold value is higher than the first rotating speed threshold value.Execution in step S140 then, drive turn of engine by starter output cranking torque, follow execution in step S142, measure the rotating speed of driving engine, whether the rotating speed of judging driving engine is higher than the first rotating speed threshold value, as is higher than the first rotating speed threshold value and then enters step S144, as is lower than then execution in step S140 still of the first rotating speed threshold value, drive turn of engine by starter, be higher than the first rotating speed threshold value until the rotating speed of driving engine.
In step S144, judge whether the rotating speed of driving engine is lower than the second rotating speed threshold value, as be lower than the second rotating speed threshold value, execution in step S146 then, make motor export cranking torque simultaneously, participate in the starting of driving engine, till the rotating speed of driving engine reaches the second rotating speed threshold value.Enter step S148 when engine speed reaches the second rotating speed threshold value, the engine starting process is finished, and motor is no longer exported cranking torque.
As a kind of preferred version of technique scheme, in this control method of cold start as when satisfying certain condition, driving engine also can be started separately by motor.Its method step flow process as shown in Figure 4, the first available discharge power threshold value and the second available discharge power threshold value of the water temperature threshold value of at first default driving engine, the first state-of-charge threshold value of high-tension battery and the second state-of-charge threshold value, high-tension battery.Wherein the second state-of-charge threshold value is higher than the first state-of-charge threshold value, and the second available discharge power threshold value is higher than the first available discharge power threshold value.
Execution in step S124 then, the size of the Engine Coolant Temperature threshold value that compares actual Engine Coolant Temperature value and preset, Engine Coolant Temperature as reality is higher than then execution in step S126 of Engine Coolant Temperature threshold value, Engine Coolant Temperature as reality is lower than then execution in step S138 of Engine Coolant Temperature threshold value, promptly by the independent fire an engine of starter.
In step S126, compare the state-of-charge value of actual high-tension battery and the size of the second state-of-charge threshold value of presetting, be higher than the second state-of-charge threshold value as the state-of-charge value of the high-tension battery of reality and then enter step S130, as be lower than the second state-of-charge threshold value and then enter step S128.
In step S128, compare the state-of-charge value of actual high-tension battery and the size of the first state-of-charge threshold value of presetting, be higher than the first state-of-charge threshold value as the state-of-charge value of the high-tension battery of reality and then enter step S132, as be lower than the first state-of-charge threshold value and then enter step S138, by the direct fire an engine separately of starter.
In step S130, compare the available discharge power value of actual high-tension battery and the size of the second available discharge power threshold value of presetting, be higher than the second default available discharge power threshold value as the available discharge power value of the high-tension battery of reality and then enter step S134, by the independent fire an engine of motor, as be lower than the second available discharge power threshold value and then enter step S132.
In step S132, compare the available discharge power value of actual high-tension battery and the size of the first available discharge power threshold value of presetting, be higher than the first default available discharge power threshold value as the available discharge power value of the high-tension battery of reality and then enter step S136, by motor and starter common activation driving engine, as be lower than the first available discharge power threshold value and then enter step S138, by the independent fire an engine of starter.
With respect to prior art, adopt the said method fire an engine, under the situation of conditions permit, can adopt motor and starter common activation driving engine also can start separately by motor, moment of torsion when so just having increased engine starting, particularly driving engine is provided with two rotating speed threshold values, when driving engine has just started, only need reach lower threshold value, therefore the overshoot of driving engine is also smaller, comparatively smooth-going during engine starting, can effectively reduce vibration and the noise of driving engine in starting process, but and emission abatement and oil consumption, pollution, energy savings reduced.
More than the control method of cold start of a kind of hybrid power system that the embodiment of the invention provided is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; part in specific embodiments and applications all can change; in sum; this description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (4)
1, a kind of control method of cold start of hybrid power system, described hybrid power system comprises motor, driving engine and hybrid power system controller, and described motor is connected with described driving engine, and described motor is driven by a high-tension battery, described driving engine also is connected with a starter, it is characterized in that:
The available discharge power that the state-of-charge that is higher than default water temperature threshold value and high-tension battery as Engine Coolant Temperature is higher than first default state-of-charge threshold value and high-tension battery is higher than the first default available discharge power threshold value, then motor participates in fire an engine, otherwise by the independent fire an engine of starter.
2, the control method of cold start of hybrid power system according to claim 1 is characterized in that: the mode that described motor participates in fire an engine is motor and starter common activation driving engine.
3, the control method of cold start of hybrid power system according to claim 1, it is characterized in that: when motor participates in fire an engine, be lower than the second default state-of-charge threshold value or available discharge power is lower than the second default available discharge power threshold value, then motor and starter common activation driving engine as the state-of-charge of high-tension battery;
When being higher than the second default state-of-charge threshold value and available discharge power and being higher than the default second available discharge power threshold value, then by the independent fire an engine of motor as the state-of-charge of high-tension battery.
According to the control method of cold start of claim 2 or 3 described hybrid power systems, it is characterized in that 4, starter and motor common activation driving engine comprise the steps:
Starter output cranking torque drives engine rotation and is higher than the first rotating speed threshold value until engine speed;
When engine speed is higher than the first rotating speed threshold value and when being lower than the second rotating speed threshold value, the motor output torque participates in fire an engine;
When engine speed reached the second rotating speed threshold value, engine starting was finished, and motor stops output torque.
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102529950A (en) * | 2010-12-31 | 2012-07-04 | 上海汽车集团股份有限公司 | Engine start control method after automatic halt of hybrid power vehicle |
| CN102529947A (en) * | 2010-12-29 | 2012-07-04 | 上海汽车集团股份有限公司 | Control method for hybrid system |
| CN103511153A (en) * | 2012-06-14 | 2014-01-15 | 通用汽车环球科技运作有限责任公司 | Method of cold starting an internal combustion engine in hybrid applications |
| CN104763546A (en) * | 2015-02-16 | 2015-07-08 | 中国北方车辆研究所 | High and low voltage combined start control method for vehicle |
| CN104828071A (en) * | 2014-02-12 | 2015-08-12 | 福特全球技术公司 | Apparatus and method for starting engine |
| CN104989534A (en) * | 2015-06-18 | 2015-10-21 | 中国北方车辆研究所 | Method for starting vehicle engine through combination of high pressure and low pressure |
| CN105667497A (en) * | 2014-11-19 | 2016-06-15 | 上海汽车集团股份有限公司 | Method and device for controlling power of electric drive system |
| CN106274517A (en) * | 2016-09-05 | 2017-01-04 | 北京新能源汽车股份有限公司 | The control method of moment of torsion, system and electric automobile in distance increasing unit starting process |
| CN106585610A (en) * | 2016-11-21 | 2017-04-26 | 浙江吉利控股集团有限公司 | Power source cold start control system and method |
| CN106585617A (en) * | 2015-10-09 | 2017-04-26 | 上海汽车集团股份有限公司 | Engine starting control method, device and HCU (hybrid electric vehicle control unit) |
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| EP1762452A3 (en) * | 2005-09-08 | 2009-05-27 | Nissan Motor Co., Ltd. | Engine starting control device and method |
| CN101397008A (en) * | 2007-09-25 | 2009-04-01 | 奇瑞汽车股份有限公司 | Hybrid vehicle battery warming-up method |
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| CN102529947A (en) * | 2010-12-29 | 2012-07-04 | 上海汽车集团股份有限公司 | Control method for hybrid system |
| CN102529947B (en) * | 2010-12-29 | 2015-06-17 | 上海汽车集团股份有限公司 | Control method for hybrid system |
| CN102529950A (en) * | 2010-12-31 | 2012-07-04 | 上海汽车集团股份有限公司 | Engine start control method after automatic halt of hybrid power vehicle |
| CN103511153A (en) * | 2012-06-14 | 2014-01-15 | 通用汽车环球科技运作有限责任公司 | Method of cold starting an internal combustion engine in hybrid applications |
| CN103511153B (en) * | 2012-06-14 | 2016-03-09 | 通用汽车环球科技运作有限责任公司 | The method of cold starting explosive motor in mixed power application |
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| CN104763546A (en) * | 2015-02-16 | 2015-07-08 | 中国北方车辆研究所 | High and low voltage combined start control method for vehicle |
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| CN112761844A (en) * | 2021-01-18 | 2021-05-07 | 中国北方车辆研究所 | Low-temperature cold start control system and control method for unmanned hybrid vehicle |
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| CN114738095A (en) * | 2022-05-09 | 2022-07-12 | 潍柴动力股份有限公司 | Engine emission control method, device, equipment and storage medium |
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