CN108119249B - BSG engine unit and starting control method and control device thereof - Google Patents
BSG engine unit and starting control method and control device thereof Download PDFInfo
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- CN108119249B CN108119249B CN201711401032.2A CN201711401032A CN108119249B CN 108119249 B CN108119249 B CN 108119249B CN 201711401032 A CN201711401032 A CN 201711401032A CN 108119249 B CN108119249 B CN 108119249B
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- engine
- oil injection
- injection time
- temperature
- temperature value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The application discloses a starting control method of a BSG engine unit, which comprises the following steps: responding to an engine starting instruction, and acquiring the temperature of the cooling liquid; determining the oil injection time of the engine according to the temperature of the cooling liquid; starting the motor, and dragging the engine to run by the motor; when the fuel injection time is reached, an engine fuel injection command is sent to control the engine to perform fuel injection operation. Based on the starting control method disclosed by the application, the oil consumption in the starting process of the engine can be reduced. The application also discloses a BSG engine unit and a control device thereof.
Description
Technical Field
The application belongs to the technical field of engines, and particularly relates to a BSG engine unit and a starting control method and a starting control device thereof.
Background
Engines are important components in motor vehicles. Currently, the starting strategy for an engine is roughly as follows: after receiving an engine starting command, when a fixed fuel injection time is reached, the engine is controlled to start fuel injection, and the basic fuel injection quantity of the engine is determined by the temperature of the cooling liquid of the engine. The relationship between the temperature of the coolant and the basic fuel injection amount of the engine is shown in fig. 1.
However, the applicant has found that the current starting strategy for the engine has the disadvantage of high fuel consumption. How to reduce oil consumption in the starting process of an engine is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, an object of the present application is to provide a start control method and a start control device for a BSG engine unit, and the BSG engine unit, so as to reduce oil consumption during the start of the engine.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a starting control method of a BSG engine unit, which comprises the following steps:
responding to an engine starting instruction, and acquiring the temperature of the cooling liquid of the BSG engine unit;
determining the oil injection time of an engine in the BSG engine unit according to the temperature of the cooling liquid, wherein the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value under the condition that the first temperature value is higher than the second temperature value;
starting a motor in the BSG engine unit, and dragging the engine to run by the motor;
and sending an engine oil injection command when the oil injection time is reached so as to control the engine to perform oil injection operation.
Optionally, in the above start-up control method, the determining an injection timing of an engine in the BSG engine block according to the temperature of the coolant includes:
determining the oil injection time of the engine by using the temperature of the cooling liquid and a pre-constructed mapping relation between the temperature of the cooling liquid and the oil injection time of the engine;
in the mapping relation, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value lower than the first temperature value.
Optionally, in the start control method, the method further includes: a map of the temperature of the coolant and the injection timing of the engine is constructed in advance.
The present application further provides a control device of a BSG engine block, including:
the temperature acquisition unit is used for responding to an engine starting instruction and acquiring the temperature of the cooling liquid of the BSG engine unit;
the oil injection time determining unit is used for determining the oil injection time of an engine in the BSG engine unit according to the temperature of the cooling liquid, wherein the oil injection time corresponding to a first temperature value is later than the oil injection time corresponding to a second temperature value under the condition that the first temperature value is higher than the second temperature value;
the first control unit is used for starting a motor in the BSG engine unit and dragging the engine to run by the motor;
and the second control unit is used for sending an engine oil injection instruction when the oil injection time is reached so as to control the engine to perform oil injection operation.
Optionally, in the above control device, the oil injection timing determining unit is specifically configured to:
determining the oil injection time of the engine by using the temperature of the cooling liquid and a pre-constructed mapping relation between the temperature of the cooling liquid and the oil injection time of the engine;
in the mapping relation, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value lower than the first temperature value.
Optionally, on the basis of the control device, a preprocessing unit may be further provided, and is configured to pre-construct a mapping relationship between the temperature of the coolant and the injection timing of the engine.
The application also provides a BSG engine unit, which comprises a motor, an engine and a control device;
the motor and the engine are driven by a belt;
the control device is used for: responding to an engine starting instruction, and acquiring the temperature of the cooling liquid of the BSG engine unit; determining the oil injection time of the engine according to the temperature of the cooling liquid, wherein the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value under the condition that the first temperature value is lower than the second temperature value; starting the motor, and dragging the engine to run by the motor; and sending an engine oil injection command when the oil injection time is reached so as to control the engine to perform oil injection operation.
Therefore, the beneficial effects of the application are as follows:
the application discloses a starting control method of a BSG engine unit, which comprises the steps of obtaining the temperature of cooling liquid after receiving an engine starting instruction, determining the oil injection time of an engine according to the temperature of the cooling liquid, wherein the higher the temperature of the cooling liquid is, the later the oil injection time of the engine is, and sending an engine oil injection instruction when the determined oil injection time is reached so as to control the oil injection of the engine, thereby finishing the starting of the engine.
It can be seen that the start control method disclosed in the present application determines the fuel injection time of the engine according to the temperature of the coolant, and the fuel injection time of the engine determined based on this method is later than the fuel injection time of the engine fixedly set in the prior art, so that the engine speed is higher when the fuel injection time is reached, the fuel injection amount of the engine is lower, and the fuel consumption during the start of the engine can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a diagram illustrating the relationship between the temperature of a coolant and the basic fuel injection quantity of an engine in the prior art;
FIG. 2 is a flow chart of a method of controlling the start-up of a BSG engine block disclosed herein;
FIG. 3 is a schematic illustration of a BSG engine block;
FIG. 4 is a diagram illustrating a relationship between a fuel injection timing, a fuel injection amount, and a temperature of a coolant of an engine during starting of a BSG engine block based on the start control method disclosed in the present application;
FIG. 5 is a block diagram of a control arrangement for a BSG engine block according to the present disclosure;
fig. 6 is a block diagram of another BSG engine block control apparatus disclosed in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The application discloses a starting control method of a BSG engine unit, which is used for reducing oil consumption in the starting process of an engine.
Referring to fig. 2, fig. 2 illustrates a start control method for a BSG engine block disclosed in the present application.
Among them, the BSG engine set is called Belt Starter Generator, also called a Belt-driven inspiring all-in-one machine. The basic structure of a BSG engine block is shown in fig. 3, and includes an engine and an electric machine, which are driven by a belt.
The starting control method comprises the following steps:
step S1: the temperature of the coolant of the BSG engine block is obtained in response to an engine start command.
Step S2: and determining the oil injection time of the engine in the BSG engine group according to the temperature of the cooling liquid. And under the condition that the first temperature value is lower than the second temperature value, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value.
Step S3: and starting a motor in the BSG engine unit, and dragging the engine to run by the motor.
After receiving an engine starting instruction, responding to the received engine starting instruction, obtaining the temperature of cooling liquid of a BSG engine unit, determining the oil injection time of the engine according to the temperature of the cooling liquid, responding to the received engine starting instruction, starting the motor, and reversely dragging the engine to run by the motor.
The injection timing of the engine is determined by the temperature of the coolant, and the higher the temperature of the coolant, the later the injection timing of the engine. That is, if the first temperature value is higher than the second temperature value, the injection timing of the engine corresponding to the temperature of the coolant being the first temperature value is later than the injection timing of the engine corresponding to the temperature of the coolant being the second temperature value.
In addition, the later the injection time of the engine, the higher the engine speed at the time of the injection time, and correspondingly, the lower the amount of fuel injected by the engine.
Fig. 4 shows the injection timing, the injection quantity, and the coolant temperature of the engine during the start of the BSG engine block. It can be seen from fig. 4 that the higher the temperature of the coolant, the later the injection time of the engine, and correspondingly, the higher the speed of the engine at the injection time, the lower the injection quantity of the engine.
Step S4: when the fuel injection time is reached, an engine fuel injection command is sent to control the fuel injection of the engine.
And when the determined oil injection time is reached, sending an engine oil injection command so as to control the engine to inject oil, wherein the engine is successfully started, and then the rotating speed of the engine is kept under an idle working condition.
The application discloses a starting control method of a BSG engine unit, which comprises the steps of obtaining the temperature of cooling liquid after receiving an engine starting instruction, determining the oil injection time of an engine according to the temperature of the cooling liquid, wherein the higher the temperature of the cooling liquid is, the later the oil injection time of the engine is, and sending an engine oil injection instruction when the determined oil injection time is reached so as to control the oil injection of the engine, thereby finishing the starting of the engine.
It can be seen that the start control method disclosed in the present application determines the fuel injection time of the engine according to the temperature of the coolant, and the fuel injection time of the engine determined based on this method is later than the fuel injection time of the engine fixedly set in the prior art, so that the engine speed is higher when the fuel injection time is reached, the fuel injection amount of the engine is lower, and the fuel consumption during the start of the engine can be reduced.
As an embodiment, step S2 determines the injection timing of the engine in the BSG engine block according to the temperature of the coolant, as follows:
and determining the fuel injection time of the engine by using the temperature of the coolant and a pre-constructed mapping relation between the temperature of the coolant and the fuel injection time of the engine.
In the mapping relation, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to a second temperature value lower than the first temperature value.
Optionally, on the basis of the above-disclosed start control method of the present application, the following steps may also be provided: a map of the temperature of the coolant and the injection timing of the engine is constructed in advance.
In implementation, the optimal injection time of the engine under different temperatures of the cooling liquid can be determined through a plurality of tests, and the mapping relation between the temperature of the cooling liquid and the injection time of the engine is constructed according to the optimal injection time of the engine.
The present application also discloses a control device for a BSG engine block, and the following description of the control device and the above description of the start-up control method may be referred to one another.
Referring to fig. 5, fig. 5 is a structural diagram of a control apparatus of a BSG engine block disclosed in the present application. The control device comprises a temperature acquisition unit 101, a fuel injection timing determination unit 102, a first control unit 103 and a second control unit 104.
Wherein:
the temperature obtaining unit 101 is configured to obtain a temperature of a coolant of the BSG engine block in response to an engine start instruction.
The fuel injection timing determination unit 102 is configured to determine a fuel injection timing of an engine in the BSG engine block according to the temperature of the coolant. And under the condition that the first temperature value is lower than the second temperature value, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value.
The first control unit 103 is used for starting a motor in the BSG engine set, and the motor drags the engine to run.
The second control unit 104 is used for sending an engine fuel injection command when fuel injection time is reached so as to control fuel injection of the engine.
The application discloses a control device of BSG engine unit determines the oil injection time of an engine according to the temperature of coolant, and the oil injection time of the engine determined based on the mode is later than the oil injection time of the engine fixedly arranged in the prior art, so that the rotating speed of the engine is high when the oil injection time is reached, the oil injection quantity of the engine is low, and the oil consumption in the starting process of the engine can be reduced.
As an embodiment, the injection timing determination unit 102 is specifically configured to: and determining the fuel injection time of the engine by using the temperature of the coolant and a pre-constructed mapping relation between the temperature of the coolant and the fuel injection time of the engine.
In the mapping relation, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to a second temperature value lower than the first temperature value.
Optionally, on the basis of the control device disclosed above in the present application, a preprocessing unit 105 may also be provided, as shown in fig. 6. The preprocessing unit 105 is used to construct in advance a map of the temperature of the coolant and the injection timing of the engine.
In implementation, the optimal injection time of the engine under different temperatures of the cooling liquid can be determined through a plurality of tests, and the mapping relation between the temperature of the cooling liquid and the injection time of the engine is constructed according to the optimal injection time of the engine.
The application also discloses a BSG engine unit, which comprises a motor, an engine and a control device, and the structure of the BSG engine unit can be seen in figure 3.
Wherein:
the motor and the engine are driven by a belt.
The control device is used for: responding to an engine starting instruction, and acquiring the temperature of a coolant of a BSG engine unit; determining the oil injection time of the engine according to the temperature of the cooling liquid, wherein the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value under the condition that the first temperature value is lower than the second temperature value; starting the motor, and dragging the engine to run by the motor; when the fuel injection time is reached, an engine fuel injection command is sent to control the fuel injection of the engine.
It should be noted that, the specific processing procedure of the control device can be referred to the description of the startup control method section in the foregoing.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A starting control method for a BSG engine unit is characterized by comprising the following steps:
responding to an engine starting instruction, and acquiring the temperature of the cooling liquid of the BSG engine unit;
determining the oil injection time of an engine in the BSG engine unit according to the temperature of the cooling liquid, wherein the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value under the condition that the first temperature value is higher than the second temperature value;
starting a motor in the BSG engine unit, and dragging the engine to run by the motor;
and sending an engine oil injection instruction to control the engine to perform oil injection operation when the oil injection time is reached, wherein the later the oil injection time of the engine is, the higher the rotating speed of the engine at the oil injection time is, and the lower the oil injection quantity of the engine is.
2. The start-up control method of claim 1, wherein the determining a fuel injection timing of an engine in the BSG engine block based on the temperature of the coolant includes:
determining the oil injection time of the engine by using the temperature of the cooling liquid and a pre-constructed mapping relation between the temperature of the cooling liquid and the oil injection time of the engine;
in the mapping relation, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value lower than the first temperature value.
3. The startup control method according to claim 2, characterized by further comprising:
a map of the temperature of the coolant and the injection timing of the engine is constructed in advance.
4. A control apparatus for a BSG engine block, comprising:
the temperature acquisition unit is used for responding to an engine starting instruction and acquiring the temperature of the cooling liquid of the BSG engine unit;
the oil injection time determining unit is used for determining the oil injection time of an engine in the BSG engine unit according to the temperature of the cooling liquid, wherein the oil injection time corresponding to a first temperature value is later than the oil injection time corresponding to a second temperature value under the condition that the first temperature value is higher than the second temperature value;
the first control unit is used for starting a motor in the BSG engine unit and dragging the engine to run by the motor;
the second control unit is used for sending an engine oil injection instruction when the oil injection time is reached so as to control the engine to perform oil injection operation;
the later the oil injection time of the engine is, the higher the rotating speed of the engine at the oil injection time is, and the lower the oil injection quantity of the engine is.
5. The control device according to claim 4, characterized in that the injection timing determination unit is specifically configured to:
determining the oil injection time of the engine by using the temperature of the cooling liquid and a pre-constructed mapping relation between the temperature of the cooling liquid and the oil injection time of the engine;
in the mapping relation, the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value lower than the first temperature value.
6. The control device according to claim 5, characterized by further comprising a preprocessing unit for previously constructing a map of the temperature of the coolant and the injection timing of the engine.
7. A BSG engine unit is characterized by comprising a motor, an engine and a control device;
the motor and the engine are driven by a belt;
the control device is used for: responding to an engine starting instruction, and acquiring the temperature of the cooling liquid of the BSG engine unit; determining the oil injection time of the engine according to the temperature of the cooling liquid, wherein the oil injection time corresponding to the first temperature value is later than the oil injection time corresponding to the second temperature value under the condition that the first temperature value is lower than the second temperature value; starting the motor, and dragging the engine to run by the motor; when the oil injection time is reached, sending an engine oil injection instruction to control the engine to perform oil injection operation; the later the oil injection time of the engine is, the higher the rotating speed of the engine at the oil injection time is, and the lower the oil injection quantity of the engine is.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711401032.2A CN108119249B (en) | 2017-12-22 | 2017-12-22 | BSG engine unit and starting control method and control device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711401032.2A CN108119249B (en) | 2017-12-22 | 2017-12-22 | BSG engine unit and starting control method and control device thereof |
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| CN108119249A CN108119249A (en) | 2018-06-05 |
| CN108119249B true CN108119249B (en) | 2020-06-26 |
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| CN110654371A (en) * | 2018-06-29 | 2020-01-07 | 比亚迪股份有限公司 | Control method and device of vehicle power system and vehicle |
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| JP2644550B2 (en) * | 1988-10-05 | 1997-08-25 | 日本特殊陶業株式会社 | Diesel engine start-up assist device |
| JP3613023B2 (en) * | 1998-08-26 | 2005-01-26 | マツダ株式会社 | In-cylinder injection engine control device |
| JP2006348863A (en) * | 2005-06-16 | 2006-12-28 | Toyota Motor Corp | Starter of internal combustion engine |
| JP5928354B2 (en) * | 2013-01-23 | 2016-06-01 | マツダ株式会社 | Spark ignition multi-cylinder engine starter |
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