CN111520262B - Control method of air intake system and vehicle - Google Patents

Control method of air intake system and vehicle Download PDF

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Publication number
CN111520262B
CN111520262B CN202010244203.0A CN202010244203A CN111520262B CN 111520262 B CN111520262 B CN 111520262B CN 202010244203 A CN202010244203 A CN 202010244203A CN 111520262 B CN111520262 B CN 111520262B
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Prior art keywords
condition
inlet
working condition
operation working
temperature
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CN111520262A (en
Inventor
梁昌水
王树森
梁延会
王福宏
李彤
梁冰
张涛
郭鑫
杨铭
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • 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
    • F02D41/0002—Controlling intake air
    • 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
    • F02D41/0002—Controlling intake air
    • F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • F02M35/10163—Supercharged engines having air intakes specially adapted to selectively deliver naturally aspirated fluid or supercharged fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10268—Heating, cooling or thermal insulating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • F02M35/1038—Sensors for intake systems for temperature or pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/501—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/701—Information about vehicle position, e.g. from navigation system or GPS signal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/702—Road conditions

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a control method of an air inlet system and an automobile.

Description

Control method of air intake system and vehicle
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to an air inlet system. The invention also relates to a vehicle.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
In the prior art, the most common diesel engine vehicle is that air is naturally sucked after air filtration, the natural suction enables an air inlet pipe to generate negative pressure, oil channeling of an air compressor is caused, in addition, the air inflation time is long, the air inflation efficiency is low, and the capacity of an entire vehicle air bottle is increased. After intercooling, gas taking can occur to rush to the engine, so that the power of the engine is reduced, the dynamic property is poor, and the economical efficiency is correspondingly poor; in addition, the temperature of the inlet air is slightly higher than that of the natural suction air (the difference between the two is 10-20 ℃), and the temperature before the dryer can be more than 65 ℃ under certain high-temperature or high-load working conditions, so that the service life of the dryer is influenced.
Disclosure of Invention
The invention aims to at least solve the problems of poor adaptability, poor reliability and high cost of an air inlet system of a vehicle air compressor in the prior art, and the aim is realized by the following technical scheme:
a first aspect of the present invention provides an intake system for supplying gas to a vehicle air compressor, the intake system including:
a first outlet of the four-way valve is used for being connected with the vehicle air compressor;
an air filter, wherein an outlet of the air filter is communicated with a first inlet of the four-way valve through a first pipeline;
a supercharger inlet of the supercharger is communicated with the first pipeline, and a supercharger outlet of the supercharger is communicated with a second inlet of the four-way valve through a second pipeline;
an intercooler, an intercooler inlet of which is communicated with the second pipeline, an intercooler outlet of which is communicated with a third inlet of the four-way valve through a third pipeline, wherein the third pipeline is provided with a third branch pipeline used for communicating an air inlet of the engine;
the ECU is used for acquiring the working condition information of the vehicle and sending an operation signal according to the working condition information and a preset control logic;
and the controller is electrically connected with the ECU and the four-way valve, and is used for receiving the operation signal sent by the ECU and controlling the on-off of the first inlet, the second inlet and the third inlet according to the operation signal.
The air inlet system provided by the invention collects the information parameters of the running condition of the vehicle through the ECU, performs corresponding logic judgment and instruction signal output, the controller acts on the four-way valve after receiving the instruction of the ECU, opens or closes the corresponding channel, realizes intelligent switching of three air intake modes, achieves optimal performance of the air compressor, the air cylinder and the brake system, reduces the failure rate of the air compressor, reduces the volume and the weight of the air cylinder of the whole vehicle, and improves the adaptability of the whole vehicle and the reliability of system operation.
In addition, the air intake system according to the present invention may have the following additional technical features:
in some embodiments of the invention, the air intake system further comprises:
the first temperature sensor is used for detecting the temperature of the air compressor for the vehicle in front of the dryer;
a second temperature sensor for detecting a temperature of the second pipeline;
a third temperature sensor for detecting a temperature of the third pipeline;
the temperature and pressure sensor is used for detecting the temperature and the pressure in front of the dryer of the vehicle air compressor;
the pressure sensor is used for detecting the pressure of a gas cylinder of the vehicle air compressor;
the first temperature sensor, the second temperature sensor, the third temperature sensor, the temperature pressure sensor and the pressure sensor are all electrically connected with the controller.
In some embodiments of the present invention, the air intake system further comprises an electronic horizon unit in communication with the ECU for determining operating conditions of the vehicle.
In some embodiments of the present invention, the ECU collects engine speed, throttle information, brake information, exhaust brake information, after-cold temperature, vehicle speed data of the vehicle.
In some embodiments of the present invention, the electronic horizon unit sends altitude information, gradient information, road condition information, and speed limit information of the vehicle during operation to the ECU.
A second aspect of the present invention provides a control method of an intake system, characterized in that the control method is implemented according to the intake system set forth in the first aspect of the present invention, the control method including the steps of:
receiving the running working condition of the running vehicle;
selecting preset control logic to determine an operation instruction according to the received operation condition;
and controlling the on-off of the first inlet, the second inlet and the third inlet according to the operation instruction.
The control method of the air inlet system provided by the second aspect of the invention judges the air inlet mode of the applicable vehicle air compressor according to the running condition of the vehicle, intelligently switches, achieves the optimal performance of the air compressor, the air cylinder and the brake system, reduces the failure rate of the air compressor, reduces the volume and the weight of the air cylinder of the whole vehicle, and improves the adaptability of the whole vehicle and the reliability of the system operation.
In some embodiments of the invention, the control method further comprises the steps of:
judging whether the operation working condition meets a first condition, wherein the first condition is that the ambient temperature in the operation working condition is lower than a first preset temperature and the operation working condition belongs to a low-load working condition, and the temperature before the dryer in the operation working condition is lower than a second preset temperature;
judging whether the operation working condition meets a second condition, wherein the second condition is that the environment temperature is higher than a first preset temperature and the operation working condition belongs to a low-load working condition, the temperature before the dryer is more than or equal to a second preset temperature, and opening a third inlet according to the result that the operation working condition meets the second condition;
judging whether the operation working condition meets a third condition, wherein the second condition is that the operation working condition belongs to a high-load working condition, and opening a first inlet according to the result that the operation working condition meets the third condition;
judging whether the operation working condition meets a fourth condition, wherein the fourth condition is that the environment temperature is higher than a first preset temperature, and starting a first inlet according to the result that the operation working condition meets the fourth condition;
judging whether the operation working condition meets a fifth condition, wherein the fifth condition is that the pressure of the gas cylinder in the operation working condition is higher than a preset pressure, and opening a first inlet according to the result that the operation working condition meets the fifth condition;
judging whether the operation working condition meets a sixth condition, wherein the sixth condition is that altitude data in the operation working condition is larger than a preset altitude, and opening a first inlet according to a result that the operation working condition meets the sixth condition;
in some embodiments of the invention, the control method further comprises the steps of: and judging whether the temperature before the dryer is greater than or equal to a third preset temperature or not according to the result that the operating condition does not meet the first condition, and if so, opening a third inlet.
In some embodiments of the invention, the control method further comprises the steps of: and judging whether the temperature before the dryer is greater than or equal to a third preset temperature or not according to the result that the operating condition does not meet the second condition, and if so, opening the first inlet.
A third aspect of the invention provides a vehicle that includes an intake system for supplying air to the vehicle air compressor, the intake system being the intake system set forth in the first aspect of the invention, the intake system including the controller for executing the control method of the intake system set forth in the second aspect of the invention.
The vehicle according to the third aspect of the present invention has the same advantageous effects as the intake system according to the first aspect of the present invention, and will not be described in detail herein.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a structural view of an intake system according to an embodiment of the invention;
FIG. 2 schematically shows a control logic diagram of a control method of an intake system according to an embodiment of the invention;
FIG. 3 schematically illustrates a road spectrum diagram of a vehicle being aspirated by natural aspiration;
the reference symbols in the drawings denote the following:
10: an engine, 11: first pipeline, 12: second pipeline, 13: a third pipeline;
20: vehicle air compressor, 30: air filter, 40: supercharger, 50: intercooler, 60: controller, 70: ECU, 80: an electronic horizon unit;
61: first temperature sensor, 62: second temperature sensor, 63: third temperature sensor, 64: temperature and pressure sensor, 65: pressure sensor
90: four-way valve, 91: first inlet, 92: second inlet, 93: third inlet, 94: a first outlet;
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "second" and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, a first aspect of the present invention provides an intake system for supplying air to an air compressor 20 for a vehicle, the intake system including:
a four-way valve 90, wherein a first outlet 94 of the four-way valve 90 is used for connecting the vehicle air compressor 20;
an air filter 30, an outlet of the air filter 30 being communicated with a first inlet 91 of the four-way valve 90 through a first pipeline 11;
the supercharger 40, the inlet of the supercharger 40 is communicated with the first pipeline 11, and the outlet of the supercharger 40 is communicated with the second inlet 92 of the four-way valve 90 through the second pipeline 12;
an inlet of the intercooler 50 is communicated with the second pipeline 12, an outlet of the intercooler 50 is communicated with a third inlet 93 of the four-way valve 90 through a third pipeline 13, and the third pipeline 13 is provided with a third branch pipeline used for communicating an air inlet of the engine 10;
the ECU70 and the ECU70 are used for collecting the working condition information of the vehicle and sending an operation signal according to the working condition information and the preset control logic;
the controller 60, the controller 60 is electrically connected with the ECU70 and the four-way valve 90, and the controller 60 is used for receiving an operation signal sent by the ECU70 and controlling the on/off of the first inlet 91, the second inlet 92 and the third inlet 93 according to the operation signal.
The air inlet system provided by the invention collects the information parameters of the running condition of the vehicle through the ECU70, corresponding logic judgment and instruction signal output are carried out, the controller 60 acts on the four-way valve 90 after receiving the instruction of the ECU70, and corresponding pipelines are opened or closed, so that the intelligent switching of three air taking modes is realized, the optimal performance of an air compressor, an air cylinder and a brake system is achieved, the failure rate of the air compressor is reduced, the volume and the weight of the air cylinder of the whole vehicle are reduced, and the adaptability of the whole vehicle and the reliability of the system operation are improved.
In addition, the air intake system according to the present invention may have the following additional technical features:
in some embodiments of the invention, the air intake system further comprises:
a first temperature sensor 61 for detecting the temperature of the vehicle air compressor 20 before the dryer;
a second temperature sensor 62 for detecting the temperature of the second pipe 12;
a third temperature sensor 63 for detecting the temperature of the third pipe 13;
a temperature-pressure sensor 64 for detecting the temperature and pressure before the dryer of the vehicle air compressor 20;
a pressure sensor 65 for detecting the cylinder pressure of the vehicular air compressor 20;
the first temperature sensor 61, the second temperature sensor 62, the third temperature sensor 63, the temperature pressure sensor 64, and the pressure sensor 65 are all electrically connected to the controller 60.
The running condition information of the vehicle is accurately and comprehensively collected through the first temperature sensor 61, the second temperature sensor 62, the third temperature sensor 63, the temperature pressure sensor 64 and the pressure sensor 65, so that the controller 60 can analyze and make judgment.
In some embodiments of the present invention, the air induction system further comprises an electronic horizon unit 80 communicatively coupled to the ECU70, the electronic horizon unit 80 being used to determine operating conditions of the vehicle. The data are provided to the ECU70 through the first electronic horizon, the data comprise the altitude, the gradient, the road condition, the speed limit requirement and the like when the vehicle runs, in addition, the ECU70 can also pre-judge in advance through the map data given by the first electronic horizon, if the front continuously descends a long slope, continuously climbs the long slope, the road condition is good, the vehicle is few, the subsequent load working condition of the engine 10 is pre-judged in advance according to the speed limit value of the road, and the air inlet channel is switched in advance.
In some embodiments of the invention, the ECU70 collects engine 10 speed, throttle information, brake information, exhaust brake information, after-cold temperature, vehicle speed data for the vehicle. Vehicle operating condition information is collected for analysis by the ECU70 to determine the applicable air induction mode for efficiency improvement.
In some embodiments of the present invention, the electronic horizon unit 80 sends altitude information, gradient information, road condition information, and speed limit information of the vehicle during operation to the ECU 70. Data is collected by the electronic horizon unit 80 to the ECU70 for the ECU70 to analyze the data for resolution.
As shown in fig. 2, a second aspect of the present invention provides a control method of an intake system, characterized in that the control method is implemented according to the intake system of the first aspect of the present invention, and the control method includes the steps of:
receiving the running working condition of the running vehicle;
selecting preset control logic to determine an operation instruction according to the received operation condition;
and controlling the on-off of the first inlet 91, the second inlet 92 and the third inlet 93 according to the operation instruction.
The control method of the air intake system provided by the second aspect of the invention judges the air intake mode of the applicable vehicle air compressor 20 according to the running condition of the vehicle, intelligently switches, achieves the optimal performance of the air compressor, the air cylinder and the brake system, reduces the failure rate of the air compressor, reduces the volume and the weight of the air cylinder of the whole vehicle, and improves the adaptability of the whole vehicle and the reliability of the system operation.
In some embodiments of the invention, the control method further comprises the steps of:
and judging whether the operation working condition meets a first condition, wherein the first condition is that the ambient temperature in the operation working condition is lower than a first preset temperature and the operation working condition belongs to a low-load working condition, the temperature before the dryer in the operation working condition is lower than a second preset temperature, and opening the second inlet 92 according to the result that the operation working condition meets the first condition. The first preset temperature may be set at 15 ℃, and when the ambient temperature is lower than 15 ℃ and the vehicle is in a low-load condition, the intercooled pre-air-taking is selected, that is, the second inlet 92 is opened. Because the ambient temperature is low in winter, the gas is quickly radiated, and the temperature before the intercooler 50 is relatively low, the exhaust temperature is not higher than the limit value; but the air inlet temperature in the three channels is relatively highest, so that the air compressor is heated quickly, the temperature rise of lubricating oil, cooling liquid and the like is quick, the probability of clamping stagnation of the piston ring is reduced, and the service life is finally prolonged;
the following conditions can be judged as low-load working conditions, such as when the vehicle is started, idling is carried out, the accelerator of the engine 10 is 0, when the engine 10 is dragged backwards, when exhaust braking is carried out, the vehicle speed is low and the like, and the low-load judgment standard is set by the internal logic of the ECU 70; the following conditions may be determined as high load conditions such as overtaking acceleration, high speed operation, heavy load hill climbing, etc., and the ECU70 sets the high load determination criteria logic based on the torque of the engine 10, the vehicle speed, the accelerator, etc.
Fig. 3 shows a road spectrum acquisition of the dump truck at 07 th of 1 month in 2019, the upper broken line in fig. 3 is an exhaust temperature broken line, the lower broken line is an environment temperature broken line, the vehicle is marked, the road condition is a PEMS test condition, the vehicle comprises 20% of urban areas, 25% of suburban areas and 55% of high speed, and the total test time is 2.5 hours. The test result shows that the environment temperature is 6-10 ℃, and the exhaust temperature of the air compressor is not more than 20 ℃. Therefore, even if the air inlet of the air compressor is switched to the channel 2 (air is taken before the intercooling), the temperature before the dryer can not exceed 65 ℃, and the whole vehicle is beneficial and has no harm.
Judging whether the operation working condition meets a second condition, wherein the second condition is that the environment temperature is higher than the first preset temperature and the operation working condition belongs to a low-load working condition, the temperature before the dryer is more than or equal to a second preset temperature, and opening a third inlet 93 according to the result that the operation working condition meets the second condition; if the ambient temperature is 20 ℃, the temperature before the dryer is detected to be less than 65 ℃, the whole vehicle runs under a low-load working condition, and the requirement on the dynamic property is not high, the ECU70 sends a command to the controller 60, and the four-way valve 90 is switched to the third inlet 93 (after inter-cooling) to take gas.
Judging whether the operation working condition meets a third condition, wherein the second condition is that the operation working condition belongs to a high-load working condition, and opening the first inlet 91 according to the result that the operation working condition meets the third condition to avoid the phenomenon of insufficient power of the vehicle;
judging whether the operation working condition meets a fourth condition, wherein the fourth condition is that the ambient temperature is higher than the first preset temperature, and opening the first inlet 91 according to the result that the operation working condition meets the fourth condition;
judging whether the operation working condition meets a fifth condition, wherein the fifth condition is that the pressure of the gas cylinder in the operation working condition is higher than a preset pressure, and opening the first inlet 91 according to the result that the operation working condition meets the fifth condition;
judging whether the operation working condition meets a sixth condition, wherein the sixth condition is that the altitude data in the operation working condition is greater than a preset altitude, and opening the first inlet 91 according to the result that the operation working condition meets the sixth condition; the ECU70 may also perform altitude determination based on the barometric pressure sensor value versus altitude.
TABLE 1 Table of natural condition variation and mechanical parameter variation at different altitudes
Figure GDA0003222020010000091
The preset judgment condition is improved, and the vehicle operation efficiency is improved by accurately deciding and selecting the air inlet mode with high applicability.
In some embodiments of the invention, the control method further comprises the steps of: and judging whether the temperature before the dryer is greater than or equal to a third preset temperature or not according to the result that the operation working condition does not meet the first condition, if so, opening the third inlet 93, wherein the third preset temperature can be set to 65 ℃, and directly switching to the intercooler 50 for air intake during idling. If a pre-dryer temperature > 65 c is detected during the continued intake of the second inlet 92, the ECU70 sends a command to the controller 60 to switch to channel 3 (after-cold intake).
In some embodiments of the invention, the control method further comprises the steps of: and judging whether the temperature before the dryer is greater than or equal to a third preset temperature or not according to the result that the operation working condition does not meet the second condition, and if so, opening the first inlet 91.
In a third aspect of the present invention, a vehicle is provided, which includes an intake system for supplying air to an air compressor 20 for a vehicle, the intake system being the intake system provided in the first aspect of the present invention, the intake system including a controller 60, the controller 60 being configured to execute the control method of the intake system provided in the second aspect of the present invention.
After the air compressor oil pumping device is installed on a vehicle, the natural air suction proportion of the air compressor can be reduced, the oil pumping fault of the air compressor can be effectively reduced, and the reliability and the adaptability of the whole vehicle are improved. As can be seen from the power, the intake pressure of the engine 10 and the intake pressure of the air compressor in table 3, when the engine 10 is in a low-load condition, the power difference between the intercooled intake air and the natural intake air is very small. However, the air inlet pressure of the air compressor is greatly influenced, and the air charging time is shortened. Therefore, the switching of the air inlet channel of the air compressor under low load basically has no influence on the whole vehicle, but has great benefit on an air compressor system.
TABLE 2 comparison of two air intake modes of external characteristic points of engine
Figure GDA0003222020010000101
After the air compressor is installed on the whole vehicle, the air compressor can improve the air inflation efficiency of the air compressor, effectively reduce the air inflation time, reduce the volume and weight of the air cylinder, improve the reliability of the whole vehicle and reduce the vehicle operation cost.
TABLE 3 comparison of air compressor inflation time at different rotation speeds and load rates
Figure GDA0003222020010000102
Figure GDA0003222020010000111
When the altitude is higher than the set value, the natural air suction is automatically switched, and the switching of other pipelines is not performed any more, because the plateau itself has low inflation pressure, the power output of the engine 10 cannot be satisfied. Thus, the whole vehicle dynamic performance is not influenced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. A control method of an intake system, characterized by comprising the steps of:
receiving the running working condition of the running vehicle;
selecting preset control logic to determine an operation instruction according to the received operation condition;
controlling the on-off of a first inlet, a second inlet and a third inlet according to the operation instruction, wherein the first inlet, the second inlet and the third inlet are all inlets of a four-way valve, an outlet of the four-way valve is communicated with an air compressor, the first inlet is communicated with an outlet of an air filter through a first pipeline, the second inlet is communicated with an outlet of a supercharger through a second pipeline, an inlet of the supercharger is communicated with the first pipeline, an inlet of an intercooler is communicated with the second pipeline, the third inlet is communicated with an outlet of the intercooler through a third pipeline, and the third pipeline is provided with a third branch pipeline used for communicating an air inlet of an engine;
the control method further comprises the following steps:
judging whether the operation working condition meets a first condition, wherein the first condition is that the ambient temperature in the operation working condition is lower than a first preset temperature and the operation working condition belongs to a low-load working condition, and the temperature before the dryer in the operation working condition is lower than a second preset temperature;
judging whether the operation working condition meets a second condition, wherein the second condition is that the environment temperature is higher than a first preset temperature and the operation working condition belongs to a low-load working condition, the temperature before the dryer is more than or equal to a second preset temperature, and opening the third inlet according to the result that the operation working condition meets the second condition;
judging whether the operation working condition meets a third condition, wherein the third condition is that the operation working condition belongs to a high-load working condition, and opening the first inlet according to the result that the operation working condition meets the third condition;
judging whether the operation working condition meets a fourth condition, wherein the fourth condition is that the environment temperature is higher than a first preset temperature, and opening the first inlet according to the result that the operation working condition meets the fourth condition;
judging whether the operation working condition meets a fifth condition, wherein the fifth condition is that the pressure of the gas cylinder in the operation working condition is higher than a preset pressure, and opening the first inlet according to the result that the operation working condition meets the fifth condition;
and judging whether the operation working condition meets a sixth condition, wherein the sixth condition is that the altitude data in the operation working condition is greater than a preset altitude, and opening the first inlet according to the result that the operation working condition meets the sixth condition.
2. The control method of an intake system according to claim 1, characterized by further comprising the steps of: and judging whether the temperature before the dryer is greater than or equal to a third preset temperature or not according to the result that the operating condition does not meet the first condition, and if so, opening the third inlet.
3. The control method of an intake system according to claim 2, characterized by further comprising the steps of: and judging whether the temperature before the dryer is greater than or equal to a third preset temperature or not according to the result that the operating condition does not meet the second condition, and if so, opening the first inlet.
4. A vehicle characterized by comprising an intake system for supplying air to an air compressor, and a controller for executing the control method of the intake system according to any one of claims 1 to 3.
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CN113250865B (en) * 2021-05-31 2022-10-28 武汉飞恩微电子有限公司 Engine air intake control system and method
CN114893313B (en) * 2022-05-24 2023-07-28 中国第一汽车股份有限公司 Method and device for detecting air leakage fault of mechanical supercharging system for engine

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