CN114439636A - Method and device for optimizing inlet temperature and reducing oil consumption of engine postprocessor - Google Patents

Method and device for optimizing inlet temperature and reducing oil consumption of engine postprocessor Download PDF

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Publication number
CN114439636A
CN114439636A CN202011227821.0A CN202011227821A CN114439636A CN 114439636 A CN114439636 A CN 114439636A CN 202011227821 A CN202011227821 A CN 202011227821A CN 114439636 A CN114439636 A CN 114439636A
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China
Prior art keywords
engine
inlet temperature
processor
threshold range
temperature threshold
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CN202011227821.0A
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Chinese (zh)
Inventor
王增养
张龙
孙博
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Beijing Foton Cummins Engine Co Ltd
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Beijing Foton Cummins Engine Co Ltd
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Priority to CN202011227821.0A priority Critical patent/CN114439636A/en
Publication of CN114439636A publication Critical patent/CN114439636A/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D2041/026—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus using an external load, e.g. by increasing generator load or by changing the gear ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/24—Control of the engine output torque by using an external load, e.g. a generator

Abstract

The invention discloses a method and a device for optimizing the inlet temperature and reducing the oil consumption of an engine postprocessor, a 48v system and a storage medium, wherein the method comprises the following steps: monitoring the inlet temperature of an engine exhaust post-processor in real time; judging whether the inlet temperature of the engine exhaust post-processor is within a preset temperature threshold range: if not, the BRM motor is controlled to execute a preset function on the engine, so that the inlet temperature of the engine exhaust postprocessor is in a preset temperature threshold range by changing the working load of the engine, the inlet temperature management function of the engine postprocessor can be realized through the BRM motor without a thermal management system, and the oil consumption can be reduced.

Description

Method and device for optimizing inlet temperature and reducing oil consumption of engine postprocessor
Technical Field
The invention belongs to the technical field of vehicle exhaust emission application, and particularly relates to a method and a device for optimizing inlet temperature and reducing oil consumption of an engine postprocessor, a 48v system and a storage medium.
Background
At present, in the face of severe diesel vehicle pollutant emission regulations and oil consumption standards, various major diesel engine main plants and whole diesel engine plants are constantly exploring new technical routes to face the coming four-stage oil consumption and emission pressure.
When the temperature of the inlet of the engine exhaust postprocessor is low, the engine exhaust postprocessor can not effectively convert harmful pollutants, so that the exhaust of the engine and the finished automobile exceeds the standard. In order to solve the problem, the emission requirement of emission regulations on engine pollutants is met, under the engine thermal management mode, oil is injected into the engine more when the inlet temperature of an exhaust postprocessor of the engine is low, so that the temperature of the postprocessor is rapidly increased to the working temperature capable of effectively converting harmful pollutants, the pollutant emission is reduced, and therefore the oil injection quantity is large under the engine thermal management mode, and the oil consumption is high.
To address the challenges of four-stage fuel consumption and discharge pressure, the 48v mild hybrid system of diesel vehicles has received considerable attention. The 48v light mixing system comprises a battery, a BRM (Boost recovery motor) motor, a belt, an engine and other traditional vehicle parts.
The BRM motor is used as a key component of a 48v light mixing system and plays a role in flexible and various adjustment and load control on the whole power system transmission system, so that the function of the BRM motor is very important. The engine thermal management system is an important component in an engine control unit and determines the emission performance and the power performance of an engine and the whole engine.
However, in the prior art, when the thermal management system is not arranged in the engine control unit, the emission performance of the engine and the whole vehicle cannot be ensured.
There is a need for a method and apparatus for engine aftertreatment inlet temperature optimization and fuel consumption reduction, 48v system, and storage medium.
Disclosure of Invention
The invention aims to solve the technical problem of ensuring the emission performance of an engine and the whole vehicle thereof and reducing the oil consumption without a thermal management system in an engine control unit.
In view of the above problems, the present invention provides a method and apparatus for optimizing the inlet temperature and reducing the fuel consumption of an engine post-processor, a 48v system, and a storage medium.
In a first aspect, the invention provides a method for optimizing inlet temperature and reducing oil consumption of an engine postprocessor, which is applied to a 48v system, wherein the 48v system comprises an engine and a BRM (brake management module) motor integrated at the rear end of the engine through a belt, and the method comprises the following steps:
monitoring the inlet temperature of an engine exhaust post-processor in real time;
judging whether the inlet temperature of the exhaust aftertreatment device of the engine is within a preset temperature threshold range or not;
and when the inlet temperature of the engine exhaust post-processor is not in the preset temperature threshold range, controlling the BRM motor to execute a preset function on the engine so as to enable the inlet temperature of the engine exhaust post-processor to be in the preset temperature threshold range by changing the work load of the engine.
According to an embodiment of the present invention, preferably, when the inlet temperature of the engine exhaust after-treatment device is not within the preset temperature threshold range, controlling the BRM motor to perform a preset function on the engine so as to make the inlet temperature of the engine exhaust after-treatment device within the preset temperature threshold range by changing the work load of the engine includes the steps of:
when the inlet temperature of the engine exhaust post-processor is not within the preset temperature threshold range, further comparing the inlet temperature of the engine exhaust post-processor with the lower limit value of the preset temperature threshold range;
and when the inlet temperature of the engine exhaust post-processor is smaller than or equal to the lower limit value of the preset temperature threshold range, controlling the BRM motor to perform a back-dragging function on the engine so as to increase the inlet temperature of the engine exhaust post-processor by increasing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within the preset temperature threshold range.
According to an embodiment of the present invention, preferably, when the inlet temperature of the engine exhaust after-treatment device is not within the preset temperature threshold range, controlling the BRM motor to perform a preset function on the engine so as to make the inlet temperature of the engine exhaust after-treatment device within the preset temperature threshold range by changing the work load of the engine includes the steps of:
when the inlet temperature of the engine exhaust post-processor is not within the preset temperature threshold range, further comparing the inlet temperature of the engine exhaust post-processor with the lower limit value of the preset temperature threshold range and the upper limit value of the preset temperature threshold range respectively;
when the inlet temperature of the engine exhaust post-processor is smaller than or equal to the lower limit value of the preset temperature threshold range, controlling the BRM motor to perform a back-dragging function on the engine so as to increase the inlet temperature of the engine exhaust post-processor by increasing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within the preset temperature threshold range;
and when the inlet temperature of the engine exhaust post-processor is greater than the upper limit value of the preset temperature threshold range, controlling the BRM motor to perform a power assisting function on the engine, so as to reduce the inlet temperature of the engine exhaust post-processor by reducing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within the preset temperature threshold range.
According to an embodiment of the present invention, preferably, the method further comprises:
and under the condition of controlling the BRM motor to perform the function of back dragging towards the engine, when the inlet temperature of an engine exhaust after-treatment device is increased to be within a preset temperature threshold range, controlling the BRM motor to keep the current torque unchanged.
According to the embodiment of the invention, preferably, the lower limit value of the preset temperature threshold range is the lowest working temperature of the engine exhaust after-treatment device when the vehicle exhaust emission requirement is met.
According to the embodiment of the invention, preferably, the difference between the upper limit value and the lower limit value of the preset temperature threshold value range is 5-10 ℃.
In a second aspect, the present invention provides an apparatus for controlling inlet temperature optimization and fuel consumption reduction of an engine post-processor, comprising:
the monitoring module is used for monitoring the inlet temperature of the processor after the engine is discharged in real time;
the judging module is used for judging whether the inlet temperature of the engine exhaust post-processor is within a preset temperature threshold range or not;
and the control module is used for controlling the BRM motor to execute a preset function on the engine when the inlet temperature of the engine exhaust after-treatment device is not in the preset temperature threshold range, so that the inlet temperature of the engine exhaust after-treatment device is in the preset temperature threshold range by changing the working load of the engine.
In a third aspect, the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above method.
In a fourth aspect, the present invention provides an engine post-processor inlet temperature optimization and fuel consumption reduction control apparatus, which includes a memory and a processor, wherein the memory stores a computer program, and the computer program implements the steps of the method when executed by the processor.
In a fifth aspect, the present invention provides a 48v system comprising:
the inlet temperature optimization and oil consumption reduction control device of the engine postprocessor is characterized in that the oil consumption reduction control device comprises a control device and a control device;
the BRM motor is integrated at the rear end of the engine through a belt, is connected with the inlet temperature optimization and oil consumption reduction control device of the engine post-processor, and is used for executing a preset function to the engine under the control of the inlet temperature optimization and oil consumption reduction control device of the engine post-processor; and
and the engine is connected with the BRM motor and is used for executing a preset function on the BRM motor to change the work load of the BRM motor so as to enable the inlet temperature of the engine exhaust aftertreatment device to be within a preset temperature threshold range.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
by applying the method for optimizing the inlet temperature and reducing the oil consumption of the post-processor of the engine, the inlet temperature of the post-processor discharged by the engine is monitored in real time; judging whether the inlet temperature of the exhaust aftertreatment device of the engine is within a preset temperature threshold range or not; when the inlet temperature of the engine exhaust postprocessor is not within the preset temperature threshold range, the BRM motor is controlled to execute a preset function on the engine, so that the inlet temperature of the engine exhaust postprocessor is within the preset temperature threshold range by changing the working load of the engine, the inlet temperature management function of the engine postprocessor can be realized through the BRM motor under the condition that an engine control unit is not provided with a thermal management system, and meanwhile, the oil consumption can be reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart illustrating a method for optimizing inlet temperature and reducing fuel consumption of an engine aftertreatment device according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating a second engine aftertreatment inlet temperature optimization and fuel consumption reduction method according to an embodiment of the invention;
FIG. 3 shows a model diagram of a three-engine aftertreatment device inlet temperature optimization and fuel consumption reduction method according to an embodiment of the invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
Example one
In order to solve the technical problems in the prior art, the embodiment of the invention provides a method for optimizing the inlet temperature and reducing the oil consumption of an engine postprocessor, which is applied to a 48v system, wherein the 48v system comprises an engine and a BRM motor integrated at the rear end of the engine through a belt.
Referring to fig. 1, the method for optimizing the inlet temperature and reducing the oil consumption of the engine post-processor of the embodiment includes the following steps:
s110, monitoring the inlet temperature of a processor after engine emission in real time;
s120, judging whether the inlet temperature of the processor after the engine is discharged is within a preset temperature threshold range;
if not, executing step S130;
if yes, no response is given;
s130, further comparing the inlet temperature of the engine exhaust post-processor with the lower limit value of a preset temperature threshold range;
s140, judging whether the inlet temperature of the engine exhaust post-processor is less than or equal to the lower limit value of the preset temperature threshold range:
if yes, go to step S150;
if not, no response is given;
and S150, controlling the BRM motor to perform a function of back dragging to the engine so as to increase the inlet temperature of the engine exhaust post-processor by increasing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within a preset temperature threshold range.
After step S150, the method further comprises:
and under the condition of controlling the BRM motor to perform the function of back dragging towards the engine, when the inlet temperature of an engine exhaust after-treatment device is increased to be within a preset temperature threshold range, controlling the BRM motor to keep the current torque unchanged.
In step S110, the difference between the upper limit value and the lower limit value of the preset temperature threshold range is 5 to 10 ℃.
In step S140, the lower limit value of the preset temperature threshold range is the lowest working temperature of the engine exhaust post-processor when the vehicle exhaust emission requirement is met.
In the method for optimizing the inlet temperature and reducing the oil consumption of the engine post-processor of the embodiment, when the inlet temperature of the engine exhaust post-processor is less than or equal to the lower limit value of the preset temperature threshold range, in order to improve the inlet temperature of an exhaust post-processor of an engine to meet the exhaust emission requirement of the whole vehicle and meet the emission regulation, and the BRM motor is controlled to pull the engine back to replace a thermal management system of the engine, the work load of the engine is increased by controlling the BRM motor to reversely drag the engine, so that the inlet temperature of the exhaust aftertreatment device of the engine is increased, the heat management system of the engine is replaced by increasing the inlet temperature of the exhaust aftertreatment device of the engine by injecting more oil to the engine, therefore, the BRM motor is controlled to reversely drag the engine so as to increase the work load of the engine to reasonably increase the fuel injection amount, and the fuel consumption is saved compared with a thermal management system of the engine.
When the method for optimizing the inlet temperature of the engine postprocessor and reducing the oil consumption is applied to the field of commercial vehicles, the thermal management system of the engine can be balanced in a 48v system by accurately controlling the BRM motor, and the oil consumption of the engine and the whole vehicle can be reduced.
Example two
In order to solve the technical problems in the prior art, the embodiment of the invention provides a method for optimizing the inlet temperature and reducing the oil consumption of an engine postprocessor, which is applied to a 48v system, wherein the 48v system comprises an engine and a BRM motor integrated at the rear end of the engine through a belt, and the method of the embodiment of the invention improves the steps S130, S140 and S150 in the first embodiment.
Referring to fig. 2, the method for optimizing the inlet temperature and reducing the oil consumption of the engine post-processor of the embodiment includes the following steps:
s210, monitoring the inlet temperature of the processor after the engine is discharged in real time;
s220, judging whether the inlet temperature of the processor after the engine is discharged is within a preset temperature threshold range;
if not, go to step S230;
if yes, no response is given;
s230, further comparing the inlet temperature of the processor after the engine is discharged with the lower limit value of the preset temperature threshold range and the upper limit value of the preset temperature threshold range respectively;
s240, when the inlet temperature of the engine exhaust post-processor is smaller than or equal to the lower limit value of the preset temperature threshold range, controlling the BRM motor to perform a back-dragging function on the engine so as to increase the inlet temperature of the engine exhaust post-processor by increasing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within the preset temperature threshold range;
and S250, when the inlet temperature of the engine exhaust post-processor is larger than the upper limit value of the preset temperature threshold range, controlling the BRM motor to perform a power assisting function on the engine, so as to reduce the inlet temperature of the engine exhaust post-processor by reducing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be in the preset temperature threshold range.
According to the method for optimizing the inlet temperature of the engine post-processor and reducing the oil consumption, when the inlet temperature of the engine exhaust post-processor is larger than the upper limit value of the preset temperature threshold range, the BRM motor is controlled to assist the engine to reduce the working load of the engine, so that when the inlet temperature of the engine exhaust post-processor is too high, the BRM motor is controlled to assist the engine to reduce the working load of the engine, and the fuel quantity of the engine is reduced.
The method for optimizing the inlet temperature of the engine postprocessor and reducing the oil consumption solves the problems of engine emission thermal management and regulated oil consumption in a 48v system, and in the 48v light mixing system, the thermal management of the engine is very important for the pollutant emission of the engine and the whole vehicle and is the key point for meeting the regulation or not. However, in the face of pressure of oil consumption of regulations, oil consumption optimization needs to be carried out on engine heat management, a BRM motor in a 48V system has good flexibility, and heat management of the engine can be balanced by the BRM motor through an accurate control algorithm, so that on the premise of ensuring a heat management function, the BRM motor is used for replacing heat management, and finally, a heat management system is optimized and oil consumption of the whole vehicle can be reduced.
The method for optimizing the inlet temperature and reducing the oil consumption of the engine postprocessor can realize the function of the thermal management system without the thermal management system and save more oil than the condition of the thermal management system.
EXAMPLE III
In order to solve the technical problems in the prior art, the embodiment of the invention also provides a model of the method for optimizing the inlet temperature and reducing the oil consumption of the post-processor of the engine.
In FIG. 3, TM is the engine thermal management mode of operation; the BRM is a 48v light mixing system motor; torque is the output torque of the flywheel end of the engine; t _ SCR _ in is the inlet temperature of the exhaust aftertreatment device of the engine; normal is the engine non-thermal management mode of operation; without an engine thermal management system; with TM is with engine thermal management system; total fuel is the overall fuel consumption.
As shown in fig. 3, the model of the present embodiment is composed of two functional modules, which are a BRM motor operation module and a normal engine non-thermal management operation module.
The engine non-thermal management operation module controls an engine to be in a power system without the TM module according to data of the engine when the engine operates in the TM module, when the inlet temperature of an engine exhaust postprocessor does not meet the lowest working temperature of the engine exhaust postprocessor when the exhaust postprocessor of the whole vehicle does not meet the exhaust emission requirement, the BRM motor is controlled to reversely drag the engine, the load of the engine is increased, the torque of the engine is increased, the inlet temperature of the engine exhaust postprocessor is increased, and finally the inlet temperature of the postprocessor is equal to the temperature data of the reference data with the TM module.
Specifically, the lowest working temperature of an engine exhaust postprocessor when the exhaust emission requirement of the whole vehicle is met is obtained according to the known inlet temperature data of the engine postprocessor with the TM system, when the inlet temperature of the engine exhaust postprocessor does not meet the exhaust emission requirement of the whole vehicle, the BRM motor is controlled accurately to perform the anti-dragging function, so that the inlet temperature of the postprocessor is consistent with the temperature of the TM system under the condition that the engine is not provided with the TM system, and the engine runs in a fuel economy area at the moment, so that the aim of reducing fuel consumption is fulfilled while the inlet temperature of the postprocessor is optimized.
In detail, on an engine without a thermal management system, when the aftertreatment inlet temperature T is low, T is compared with the T data with a thermal management system:
when y-T reaches the value k and tends to be larger than k, the BRM motor starts to perform the back-dragging function on the engine, the working load of the engine is increased, the working speed and the torque of the engine are increased, the exhaust temperature is also increased, and therefore the aftertreatment inlet temperature is increased;
when the calculated real-time data is y equal to k, the BRM motor keeps the reverse thrust torque and maintains the current thermal management function;
when y after real-time data operation is less than k, the BRM motor stops the back-dragging function, the whole vehicle power assisting function in the controller is performed according to working condition requirements, the engine is assisted under the requirement of maintaining the current temperature, and the fuel consumption of the engine and the whole vehicle is reduced.
The control of the three stages is to electronically acquire signals in real time, judge and execute the signals, and optimize the operation of the engine in real time, so that the engine and the whole vehicle are always in the optimal operation interval of performance, emission and oil consumption.
The temperature requirement of the post-processor without a TM system can be met by testing the control model, the oil consumption of the whole vehicle is greatly optimized, and the oil consumption of the engine and the whole vehicle is reduced.
The embodiment can meet the temperature requirement of the engine without a TM system and an exhaust aftertreatment device, and the engine can operate in an economic area on the premise of meeting the temperature requirement after the TM system is removed, so that the fuel consumption is reduced;
the control model of the embodiment can realize target functions on the premise of not changing hardware on a 48v system, optimize products and improve performance and competitiveness;
the control model of the embodiment can provide powerful technical support and product technical routes for four-stage fuel consumption and strict emission regulations of the commercial vehicle.
In the non-thermal management mode, when the inlet temperature of the exhaust aftertreatment device of the engine is low, the BRM motor is used for reversely dragging the engine to increase the work load of the engine, so that the inlet temperature of the exhaust aftertreatment device of the engine is increased, the inlet temperature of the exhaust aftertreatment device of the engine does not need to be increased by injecting more oil into the engine, and therefore the oil injection amount in the non-thermal management mode is small.
Example four
In order to solve the technical problems in the prior art, the embodiment of the invention also provides a control device for optimizing the inlet temperature and reducing the oil consumption of the post-processor of the engine.
The engine postprocessor inlet temperature optimizing and oil consumption reducing control device of the embodiment comprises:
the monitoring module is used for monitoring the inlet temperature of the processor after the engine is discharged in real time;
the judging module is used for judging whether the inlet temperature of the engine exhaust post-processor is within a preset temperature threshold range or not;
and the control module is used for controlling the BRM motor to execute a preset function on the engine when the inlet temperature of the engine exhaust after-treatment device is not in the preset temperature threshold range, so that the inlet temperature of the engine exhaust after-treatment device is in the preset temperature threshold range by changing the working load of the engine.
EXAMPLE five
In order to solve the above technical problems in the prior art, an embodiment of the present invention further provides a storage medium.
The storage medium of the present embodiment has stored thereon a computer program which, when executed by a processor, implements the steps of the method in the above-described embodiments.
EXAMPLE six
In order to solve the technical problems in the prior art, the embodiment of the invention also provides a control device for optimizing the inlet temperature and reducing the oil consumption of the post-processor of the engine.
The control device for optimizing the inlet temperature and reducing the oil consumption of the engine postprocessor comprises a memory and a processor, wherein a computer program is stored in the memory, and the steps of the method are realized when the computer program is executed by the processor.
EXAMPLE seven
In order to solve the above technical problems in the prior art, an embodiment of the present invention further provides a 48v system.
The 48v system of the present embodiment includes:
the inlet temperature optimization and oil consumption reduction control device of the engine post-processor is provided;
the BRM motor is integrated at the rear end of the engine through a belt, is connected with the inlet temperature optimization and oil consumption reduction control device of the engine post-processor, and is used for executing a preset function to the engine under the control of the inlet temperature optimization and oil consumption reduction control device of the engine post-processor; and
and the engine is connected with the BRM motor and used for executing a preset function on the engine through the BRM motor to change the work load of the engine so as to enable the inlet temperature of the engine exhaust aftertreatment device to be within a preset temperature threshold range.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A method for optimizing inlet temperature and reducing oil consumption of an engine postprocessor is applied to a 48v system, the 48v system comprises an engine and a BRM motor integrated at the rear end of the engine through a belt, and the method is characterized by comprising the following steps of:
monitoring the inlet temperature of an engine exhaust post-processor in real time;
judging whether the inlet temperature of the exhaust aftertreatment device of the engine is within a preset temperature threshold range or not;
and when the inlet temperature of the engine exhaust after-treatment device is not in the preset temperature threshold range, controlling the BRM motor to execute a preset function on the engine so as to enable the inlet temperature of the engine exhaust after-treatment device to be in the preset temperature threshold range by changing the work load of the engine.
2. The method of claim 1, wherein controlling the BRM motor to perform a predetermined function on the engine to bring the inlet temperature of the engine exhaust aftertreatment device within a predetermined temperature threshold range by varying the workload of the engine when the inlet temperature of the engine exhaust aftertreatment device is not within the predetermined temperature threshold range comprises the steps of:
when the inlet temperature of the engine exhaust post-processor is not within the preset temperature threshold range, further comparing the inlet temperature of the engine exhaust post-processor with the lower limit value of the preset temperature threshold range;
and when the inlet temperature of the engine exhaust post-processor is smaller than or equal to the lower limit value of the preset temperature threshold range, controlling the BRM motor to perform a back-dragging function to the engine so as to increase the inlet temperature of the engine exhaust post-processor by increasing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be in the preset temperature threshold range.
3. The method of claim 1, wherein controlling the BRM motor to perform a predetermined function on the engine to bring the inlet temperature of the engine exhaust aftertreatment device within a predetermined temperature threshold range by varying the workload of the engine when the inlet temperature of the engine exhaust aftertreatment device is not within the predetermined temperature threshold range comprises the steps of:
when the inlet temperature of the engine exhaust post-processor is not within the preset temperature threshold range, further comparing the inlet temperature of the engine exhaust post-processor with the lower limit value of the preset temperature threshold range and the upper limit value of the preset temperature threshold range respectively;
when the inlet temperature of the engine exhaust post-processor is smaller than or equal to the lower limit value of the preset temperature threshold range, controlling the BRM motor to perform a back-dragging function on the engine so as to increase the inlet temperature of the engine exhaust post-processor by increasing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within the preset temperature threshold range;
and when the inlet temperature of the engine exhaust post-processor is greater than the upper limit value of the preset temperature threshold range, controlling the BRM motor to perform a power assisting function on the engine, so as to reduce the inlet temperature of the engine exhaust post-processor by reducing the work load of the engine and enable the inlet temperature of the engine exhaust post-processor to be within the preset temperature threshold range.
4. A method according to claim 2 or 3, characterized in that the method further comprises:
and under the condition of controlling the BRM motor to perform the function of back dragging towards the engine, when the inlet temperature of an engine exhaust after-treatment device is increased to be within a preset temperature threshold range, controlling the BRM motor to keep the current torque unchanged.
5. The method according to any one of claims 1 to 3, wherein the lower limit value of the preset temperature threshold range is the lowest working temperature of an engine exhaust after-treatment device when the vehicle exhaust emission requirement is met.
6. The method according to any one of claims 1 to 3, wherein the upper limit value and the lower limit value of the preset temperature threshold range are different by 5-10 ℃.
7. An engine aftertreatment ware inlet temperature optimization and oil consumption reduction controlling means which characterized in that includes:
the monitoring module is used for monitoring the inlet temperature of the processor after the engine is discharged in real time;
the judging module is used for judging whether the inlet temperature of the engine exhaust post-processor is within a preset temperature threshold range or not;
and the control module is used for controlling the BRM motor to execute a preset function on the engine when the inlet temperature of the engine exhaust after-treatment device is not in the preset temperature threshold range, so that the inlet temperature of the engine exhaust after-treatment device is in the preset temperature threshold range by changing the working load of the engine.
8. A storage medium on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6.
9. An engine post-processor inlet temperature optimization and fuel consumption reduction control device comprising a memory and a processor, characterized in that the memory has stored thereon a computer program which, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 6.
10. A 48v system, comprising:
the engine aftertreatment inlet temperature optimization and fuel consumption reduction control device of claim 9;
the BRM motor is integrated at the rear end of the engine through a belt, is connected with the inlet temperature optimization and oil consumption reduction control device of the engine post-processor, and is used for executing a preset function to the engine under the control of the inlet temperature optimization and oil consumption reduction control device of the engine post-processor; and
and the engine is connected with the BRM motor and used for executing a preset function on the engine through the BRM motor to change the work load of the engine so as to enable the inlet temperature of the engine exhaust aftertreatment device to be within a preset temperature threshold range.
CN202011227821.0A 2020-11-05 2020-11-05 Method and device for optimizing inlet temperature and reducing oil consumption of engine postprocessor Pending CN114439636A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9813294D0 (en) * 1997-07-05 1998-08-19 Rover Group Temperature control of exhaust gas catalytic converters in vehicles
WO2000023295A1 (en) * 1998-10-16 2000-04-27 Renault Hybrid engine transmission unit
EP1182074A2 (en) * 2000-08-25 2002-02-27 Ford Global Technologies, Inc. Method of operating a hybrid electric vehicle to reduce emissions
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