CN111963282A - Automobile-used urea heating system that unfreezes - Google Patents
Automobile-used urea heating system that unfreezes Download PDFInfo
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- CN111963282A CN111963282A CN202010763551.9A CN202010763551A CN111963282A CN 111963282 A CN111963282 A CN 111963282A CN 202010763551 A CN202010763551 A CN 202010763551A CN 111963282 A CN111963282 A CN 111963282A
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- cooling water
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- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
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- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention provides a vehicle urea heating and unfreezing system which comprises a urea pump, a nozzle and a urea tank, wherein urea solution flows from the urea tank to the urea pump through a urea pipeline and then flows to the nozzle; the device is characterized by also comprising a cooling water pipeline, a temperature sensor, a control unit and a cooling water electromagnetic valve; the temperature sensors are respectively arranged outside the urea tank and the room and are respectively used for measuring the temperature of the urea tank and the ambient temperature; the cooling water pipeline is arranged in the urea tank and the urea pump and used for heating urea; the cooling water pipeline is provided with a cooling water electromagnetic valve for controlling the flow of cooling water in the cooling water pipeline; the control unit is electrically connected with the temperature sensor and the cooling water electromagnetic valve, receives temperature information from the temperature sensor and drives the cooling water electromagnetic valve based on the temperature information. The invention accurately controls the heating of urea.
Description
Technical Field
The invention relates to the technical field of vehicle aftertreatment, in particular to a vehicle urea heating and unfreezing system.
Background
With the coming implementation of the national six-emission regulation, currently, diesel engine manufacturers are developing national six-diesel engines, which are matched with an aftertreatment system of a catalytic oxidizer (DOC) + a particulate filter (DPF) + a selective redox reactor (SCR) in order to reduce NOx and particulate emissions in engine exhaust, and urea is injected into an exhaust pipe through a urea injection system, and then is decomposed into NH3 to react with NOx to reduce NOx emissions.
The national six regulations require that after the urea tank is completely frozen, the vehicle runs for 10-20 minutes at a low temperature of-17-7 ℃ in an idling mode, then runs for no more than 50 minutes at a load of no more than 40%, and the urea injection system can work normally.
In the prior art, the heating and unfreezing requirements are judged according to the temperature of a urea tank and the temperature of a urea pump, and if the temperature of the urea tank and the temperature of the urea pump are smaller than set values, heating is started; and if the temperature of the urea tank and the temperature of the urea pump are greater than the set values, the heating is closed. This may result in frequent opening and closing of the heating solenoid valve and high and low temperature steps in the urea temperature.
Disclosure of Invention
The invention aims to provide a vehicle urea heating and unfreezing system aiming at the defects of the prior art, and urea heating is accurately controlled.
The invention provides a vehicle urea heating and unfreezing system which comprises a urea pump, a nozzle and a urea tank, wherein urea solution flows from the urea tank to the urea pump through a urea pipeline and then flows to the nozzle; the device is characterized by also comprising a cooling water pipeline, a temperature sensor, a control unit and a cooling water electromagnetic valve; the temperature sensors are respectively arranged outside the urea tank and are respectively used for measuring the temperature of urea in the urea tank and the ambient temperature; the cooling water pipeline is arranged in the urea tank and the urea pump and used for heating urea; the cooling water pipeline is provided with a cooling water electromagnetic valve for controlling the flow of cooling water in the cooling water pipeline; the control unit is electrically connected with the temperature sensor and the cooling water electromagnetic valve, receives temperature information from the temperature sensor and drives the cooling water electromagnetic valve based on the temperature information.
In the technical scheme, the urea heating pipe is arranged outside a urea pipeline between the urea tank and the urea pump and a urea pipeline between the nozzle and the urea pump and used for heating urea flowing in the urea pipeline; the control unit is electrically connected with the urea heating pipe through the urea pipe electromagnetic valve and used for driving the urea heating pipe through the urea pipe electromagnetic valve based on temperature information.
In the above technical scheme, the temperature sensor is further arranged in the urea pump and used for measuring the temperature of urea in the urea pump.
In the technical scheme, after the vehicle is powered on, the urea pump is in a non-heating state; when the urea pump is not heated, if the detection value of the temperature of the urea pump or the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a first cooling water heating state, the first cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be opened, and cooling water circulating in a cooling water pipeline is used for heating urea in the urea tank and the urea pump;
when the control unit is in the first cooling water heating state, if the detected values of the temperature of the urea pump and the temperature of the urea tank are both larger than a second target value and smaller than a third target value, the control unit is switched to a second cooling water heating state, the second cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be intermittently opened, and cooling water flowing in a cooling water pipeline heats the urea in the urea tank and the urea pump;
when the control unit is in the first cooling water heating state, if the detection values of the temperature of the urea pump and the temperature of the urea tank are both larger than a fourth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to be closed;
when the control unit is in a second cooling water heating state, if the detection values of the temperature of the urea pump and the temperature of the urea tank are both larger than a fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to be closed;
wherein the first target value is smaller than the second target value, smaller than the third target value, smaller than the fourth target value, and smaller than the fifth target value.
In the technical scheme, after the vehicle is powered on, the urea pipe is in a non-heating state;
when the urea pipe is in a non-heating state, if the detection value of the temperature of the urea pump or the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a first electric heating state, and the first electric heating state is that the control unit drives the urea pipe electromagnetic valve to be opened and drives the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea pump, the temperature of the urea tank and the ambient temperature are both larger than a second target value and smaller than a third target value, the control unit is switched to a second electric heating state, and the second electric heating state is that the control unit drives the urea pipe electromagnetic valve to be intermittently opened to drive the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea pump, the temperature of the urea tank and the ambient temperature are all larger than a fourth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed;
when the control unit is in the second electric heating state, if the detection values of the urea pump temperature, the urea tank temperature and the environment temperature are all larger than the fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed.
In the technical scheme, after the vehicle is powered on, the urea pump is in a non-heating state;
when the urea pump is in a non-heating state, if the detection value of the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a third cooling water heating state, the third cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be opened, cooling water circulating in a cooling water pipeline heats urea in the urea tank and the urea pump, and when the urea pump is in the third cooling water heating state and lasts for a period of time, the urea pump is switched to the first cooling water heating state; the first cooling water heating state is that the control unit drives the cooling water electromagnetic valve to be opened, and the cooling water circulating in the cooling water pipeline heats the urea in the urea tank and the urea pump
When the control unit is in a first cooling water heating state, if the detected value of the temperature of the urea tank is larger than a second target value and smaller than a third target value, the control unit is switched to a second cooling water heating state, the second cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be intermittently opened, and cooling water flowing in a cooling water pipeline is used for heating urea in the urea tank and a urea pump;
when the control unit is in a first cooling water heating state, if the detected values of the temperature of the urea tank are all larger than a second target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to close;
when the control unit is in the second cooling water heating state, if the detected values of the temperature of the urea tank are all larger than the fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to be closed.
In the technical scheme, after the vehicle is powered on, the urea pipe is in a non-heating state; when the urea pipe is in a non-heating state, if the detection value of the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a first electric heating state, and the first electric heating state is that the control unit drives the urea pipe electromagnetic valve to be opened and drives the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea tank and the ambient temperature are both larger than a second target value and smaller than a third target value, the control unit is switched to a second electric heating state, and the second electric heating state is that the control unit drives the urea pipe electromagnetic valve to be intermittently opened to drive the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea tank and the ambient temperature are both larger than a fourth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed;
when the control unit is in the second electric heating state, if the detection values of the temperature of the urea tank and the ambient temperature are both larger than the fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed.
In the technical scheme, the value range of the first target value is-40-10 ℃, the value range of the second target value is-39-15 ℃, the value range of the third target value is-30-20 ℃, the value range of the fourth target value is-10-45 ℃, and the value range of the fifth target value is-10-50 ℃.
In the technical scheme, when the control unit is in the first cooling water heating state, the duty ratio of the opening of the electromagnetic valve of the cooling water is 20% -100%; when the control unit is in the second cooling water heating state, the duty ratio of the intermittent opening of the electromagnetic valve of the cooling water is 5% -95%; when the control unit is in a first electric heating state, the duty ratio of the opening of the urea pipe electromagnetic valve is 20% -100%; when the control unit is in the second electric heating state, the duty ratio of the urea pipe electromagnetic valve which is intermittently opened is 5% -95%.
In the technical scheme, the duration time of the heating state of the third cooling water is 3-300 min.
According to the invention, different heating strategies are formulated according to different states of the vehicle in the using process so as to meet the actual temperature requirement of urea. The heating strategy sets different temperature values and heating time according to different working conditions, so that the heating process is safer and more effective, and the condition of step change of the urea temperature is avoided.
Drawings
FIG. 1 is a schematic view of the present invention
FIG. 2 is a schematic view showing a state where cooling water is heated when a urea pump temperature sensor is provided in the present invention;
FIG. 3 is a schematic diagram of the electrical heating state of the present invention with a urea pump temperature sensor;
FIG. 4 is a schematic view showing a state where cooling water is heated when a urea pump temperature sensor is not provided in the present invention;
FIG. 5 is a schematic diagram of the electrical heating state of the present invention without a urea pump temperature sensor.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
As shown in FIG. 1, the invention provides a vehicle urea heating and thawing system, which comprises a urea pump, a nozzle and a urea tank, wherein a urea solution flows from the urea tank to the urea pump and then to the nozzle through a urea pipeline; the device is characterized by also comprising a cooling water pipeline, a temperature sensor, a control unit and a cooling water electromagnetic valve; the temperature sensors are respectively arranged outside the urea tank and the room and are respectively used for measuring the temperature of the urea tank and the ambient temperature; the cooling water pipeline is arranged in the urea tank and the urea pump and used for heating urea; the cooling water pipeline is provided with a cooling water electromagnetic valve for controlling the flow of cooling water in the cooling water pipeline; the control unit is electrically connected with the temperature sensor and the cooling water electromagnetic valve, receives temperature information from the temperature sensor and drives the cooling water electromagnetic valve based on the temperature information.
In the technical scheme, the urea heating pipe is arranged outside a urea pipeline between the urea tank and the urea pump and a urea pipeline between the nozzle and the urea pump and used for heating urea flowing in the urea pipeline; the control unit is electrically connected with the urea heating pipe and used for driving the urea heating pipe based on the temperature information.
Urea solution flows through the urea heating pipe, flows to the urea pump from the urea jar, and then flows to the nozzle, spouts the aftertreatment ware in through the nozzle, flows through cooling water in the cooling water pipeline, and the cooling water temperature is higher, can heat the urea in the urea jar and unfreeze, and the urea heating pipe can heat the urea in the pipeline. A urea temperature sensor is arranged in the urea tank, and a urea temperature sensor can be arranged in the urea pump.
When the urea pump is provided with the urea temperature sensor, a plurality of different working modes are provided, and the working modes are as follows:
1. cooling water heating control
a) After the vehicle is started, the urea pump is in a non-heating state;
b) when the urea pump is in a non-heating state, if the temperature of the urea pump or the temperature of the urea tank or the environmental temperature is less than a set value (such as-40-10 ℃), the urea pump is switched to a cooling water heating state 1, and the control unit controls the opening of the cooling water electromagnetic valve (such as the duty ratio is 20-100%) to heat the urea pump and the urea tank;
c) when the urea pump is in a cooling water heating state 1, when the temperature of the urea pump and the temperature of the urea tank are both greater than a set value (such as minus 39-15 ℃) and less than a set value (such as minus 30-20 ℃), switching to a cooling water heating state 2, and controlling the cooling water electromagnetic valve to be intermittently opened by the control unit (such as the opening duty ratio is 5-90%); when the temperature of the urea pump and the temperature of the urea tank are both greater than set values (such as-10-45 ℃), switching to a non-heating state, and controlling the cooling water electromagnetic valve to be closed by the control unit;
d) when the urea pump is in a cooling water heating state 2 and the temperature of the urea pump and the temperature of the urea tank are both greater than set values (such as minus 10-50 ℃), the heating state is switched to a non-heating state, and the control unit controls the cooling water electromagnetic valve to be closed.
2. Heating urea heating pipe
a) After the vehicle is started, the urea pipe is in a non-heating state;
b) when the urea pipe is in a non-heating state, if the temperature of the urea pump or the temperature of the urea tank or the ambient temperature is less than a set value (such as-40-10 ℃), switching to an electric heating state 1, and controlling the opening of a cold urea pipe electromagnetic valve (such as the duty ratio of 20-100%) by a control unit to heat the urea pipe;
c) when the urea pipe is in an electric heating state 1, and when the ambient temperature, the urea pump temperature and the urea tank temperature are all larger than a set value (such as minus 39-15 ℃) and smaller than a set value (such as minus 30-20 ℃), switching to an electric heating state 2, and controlling the urea pipe electromagnetic valve to be intermittently opened by the control unit (such as the opening duty ratio is 5-90%); when the environmental temperature, the urea pump temperature and the urea tank temperature are all higher than set values (such as minus 10-45 ℃), the heating state is switched to a non-heating state, and the control unit controls the urea pipe electromagnetic valve to be closed;
d) when the urea pump is in an electric heating state 2 and the environment temperature, the urea pump temperature and the urea tank temperature are all larger than set values (such as minus 10-50 ℃), the heating state is switched to a non-heating state, and the control unit controls the urea pipe electromagnetic valve to be closed.
When the urea pump is not provided with the urea temperature sensor, the invention provides several different working modes, which are as follows:
1. cooling water heating control
a) After the vehicle is started, the urea pump is in a non-heating state;
b) when the urea pump is in a non-heating state, if the temperature of the urea tank or the ambient temperature is less than a set value (such as-40-10 ℃), switching to a cooling water heating state 3, and controlling a cooling water electromagnetic valve to be opened (such as the duty ratio of 20-100%) by a control unit to heat the urea pump and the urea tank;
c) when the urea pump is in a cooling water heating state 3 and lasts for a period of time t (such as 3 min-300 min), switching to a cooling water heating state 1;
c) when the urea pump is in a cooling water heating state 1, when the temperature of the urea tank is higher than a set value (such as minus 39-15 ℃) and lower than the set value (such as minus 30-20 ℃), the urea tank is switched to a cooling water heating state 2, and the control unit controls the cooling water electromagnetic valve to be intermittently opened (such as the opening duty ratio is 5-90%); when the temperature of the urea tank is higher than a set value (such as-10-45 ℃), switching to a non-heating state, and controlling the cooling water electromagnetic valve to be closed by the control unit;
d) when the urea pump is in a cooling water heating state 2 and the temperature of the urea tank is higher than a set value (such as-10-50 ℃), the urea tank is switched to a non-heating state, and the control unit controls the cooling water electromagnetic valve to be closed.
2. Heating urea heating pipe
a) After the vehicle is started, the urea pipe is in a non-heating state;
b) when the urea pipe is in a non-heating state, if the temperature of the urea tank or the ambient temperature is less than a set value (such as-40-10 ℃), switching to an electric heating state 1, and controlling the opening of a cold urea pipe electromagnetic valve (such as the duty ratio of 20-100%) by a control unit to heat the urea pipe;
c) when the urea pipe is in an electric heating state 1, and when the ambient temperature and the temperature of the urea tank are both greater than a set value (such as minus 39-15 ℃) and less than a set value (such as minus 30-20 ℃), switching to an electric heating state 2, and controlling the urea pipe electromagnetic valve to be intermittently opened by the control unit (such as the opening duty ratio is 5-90%); when the ambient temperature and the urea tank temperature are both greater than set values (such as-10-45 ℃), switching to a non-heating state, and controlling the urea pipe electromagnetic valve to be closed by the control unit;
d) when the urea pump is in an electric heating state 2 and the ambient temperature and the temperature of the urea tank are both greater than set values (such as minus 10-50 ℃), the urea pump is switched to a non-heating state, and the control unit controls the electromagnetic valve of the urea pipe to be closed.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. A vehicle urea heating and unfreezing system comprises a urea pump, a nozzle and a urea tank, wherein urea solution flows from the urea tank to the urea pump through a urea pipeline and then flows to the nozzle; the device is characterized by also comprising a cooling water pipeline, a temperature sensor, a control unit and a cooling water electromagnetic valve; the temperature sensors are respectively arranged outside the urea tank and are respectively used for measuring the temperature of urea in the urea tank and the ambient temperature; the cooling water pipeline is arranged in the urea tank and the urea pump and used for heating urea; the cooling water pipeline is provided with a cooling water electromagnetic valve for controlling the flow of cooling water in the cooling water pipeline; the control unit is electrically connected with the temperature sensor and the cooling water electromagnetic valve, receives temperature information from the temperature sensor and drives the cooling water electromagnetic valve based on the temperature information.
2. The vehicle urea heating thawing system of claim 1, further comprising a urea heating pipe disposed outside a urea pipe between the urea tank and the urea pump and a urea pipe between the nozzle and the urea pump for heating urea flowing in the urea pipe; the control unit is electrically connected with the urea heating pipe through the urea pipe electromagnetic valve and used for driving the urea heating pipe through the urea pipe electromagnetic valve based on temperature information.
3. The heating and thawing system for vehicle urea as claimed in claim 2, wherein the temperature sensor is further disposed in the urea pump for measuring the temperature of urea in the urea pump.
4. The vehicle urea heating and thawing system of claim 3, wherein after the vehicle is powered on, the urea pump is in a non-heating state; when the urea pump is not heated, if the detection value of the temperature of the urea pump or the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a first cooling water heating state, the first cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be opened, and cooling water circulating in a cooling water pipeline is used for heating urea in the urea tank and the urea pump;
when the control unit is in the first cooling water heating state, if the detected values of the temperature of the urea pump and the temperature of the urea tank are both larger than a second target value and smaller than a third target value, the control unit is switched to a second cooling water heating state, the second cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be intermittently opened, and cooling water flowing in a cooling water pipeline heats the urea in the urea tank and the urea pump;
when the control unit is in the first cooling water heating state, if the detection values of the temperature of the urea pump and the temperature of the urea tank are both larger than a fourth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to be closed;
when the control unit is in a second cooling water heating state, if the detection values of the temperature of the urea pump and the temperature of the urea tank are both larger than a fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to be closed;
wherein the first target value is smaller than the second target value, smaller than the third target value, smaller than the fourth target value, and smaller than the fifth target value.
5. The vehicle urea heating and thawing system of claim 4, wherein after the vehicle is powered on, the urea pipe is in a non-heating state;
when the urea pipe is in a non-heating state, if the detection value of the temperature of the urea pump or the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a first electric heating state, and the first electric heating state is that the control unit drives the urea pipe electromagnetic valve to be opened and drives the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea pump, the temperature of the urea tank and the ambient temperature are both larger than a second target value and smaller than a third target value, the control unit is switched to a second electric heating state, and the second electric heating state is that the control unit drives the urea pipe electromagnetic valve to be intermittently opened to drive the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea pump, the temperature of the urea tank and the ambient temperature are all larger than a fourth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed;
when the control unit is in the second electric heating state, if the detection values of the urea pump temperature, the urea tank temperature and the environment temperature are all larger than the fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed.
6. The urea heating and thawing system for the vehicle of claim 2, wherein after the vehicle is powered on, the urea pump is in a non-heating state;
when the urea pump is in a non-heating state, if the detection value of the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a third cooling water heating state, the third cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be opened, cooling water circulating in a cooling water pipeline heats urea in the urea tank and the urea pump, and when the urea pump is in the third cooling water heating state and lasts for a period of time, the urea pump is switched to the first cooling water heating state; the first cooling water heating state is that the control unit drives the cooling water electromagnetic valve to be opened, and the cooling water circulating in the cooling water pipeline heats the urea in the urea tank and the urea pump
When the control unit is in a first cooling water heating state, if the detected value of the temperature of the urea tank is larger than a second target value and smaller than a third target value, the control unit is switched to a second cooling water heating state, the second cooling water heating state is that the control unit drives a cooling water electromagnetic valve to be intermittently opened, and cooling water flowing in a cooling water pipeline is used for heating urea in the urea tank and a urea pump;
when the control unit is in a first cooling water heating state, if the detected values of the temperature of the urea tank are all larger than a second target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to close;
when the control unit is in the second cooling water heating state, if the detected values of the temperature of the urea tank are all larger than the fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the cooling water electromagnetic valve to be closed.
7. The vehicle urea heating and thawing system of claim 6, wherein after the vehicle is powered on, the urea pipe is in a non-heating state; when the urea pipe is in a non-heating state, if the detection value of the temperature of the urea tank or the ambient temperature is smaller than a first target value, the control unit is switched to a first electric heating state, and the first electric heating state is that the control unit drives the urea pipe electromagnetic valve to be opened and drives the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea tank and the ambient temperature are both larger than a second target value and smaller than a third target value, the control unit is switched to a second electric heating state, and the second electric heating state is that the control unit drives the urea pipe electromagnetic valve to be intermittently opened to drive the urea heating pipe to heat;
when the control unit is in a first electric heating state, if the detection values of the temperature of the urea tank and the ambient temperature are both larger than a fourth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed;
when the control unit is in the second electric heating state, if the detection values of the temperature of the urea tank and the ambient temperature are both larger than the fifth target value, the control unit is switched to a non-heating state, and the non-heating state is that the control unit drives the urea pipe electromagnetic valve to be closed.
8. The vehicle urea heating and thawing system according to claim 5 or 7, wherein the first target value ranges from-40 ℃ to 10 ℃, the second target value ranges from-39 ℃ to 15 ℃, the third target value ranges from-30 ℃ to 20 ℃, the fourth target value ranges from-10 ℃ to 45 ℃, and the fifth target value ranges from-10 ℃ to 50 ℃.
9. The urea heating and thawing system for the vehicle as claimed in claim 8, wherein when the control unit is in the first cooling water heating state, the duty ratio of the opening of the electromagnetic valve of the cooling water is 20% -100%; when the control unit is in the second cooling water heating state, the duty ratio of the intermittent opening of the electromagnetic valve of the cooling water is 5% -95%; when the control unit is in a first electric heating state, the duty ratio of the opening of the urea pipe electromagnetic valve is 20% -100%; when the control unit is in the second electric heating state, the duty ratio of the urea pipe electromagnetic valve which is intermittently opened is 5% -95%.
10. The urea heating and thawing system for the vehicle as claimed in claim 9, wherein the duration of the heating state of the third cooling water is 3min to 300 min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107645A (en) * | 2021-04-07 | 2021-07-13 | 东风商用车有限公司 | SCR urea heating unfreezing control system and method |
| CN113969814A (en) * | 2021-09-30 | 2022-01-25 | 东风商用车有限公司 | Control method of urea injection system |
| CN114458424A (en) * | 2022-01-05 | 2022-05-10 | 东风商用车有限公司 | Protection method for electromagnetic valve of urea tank cooling water |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012007511A (en) * | 2010-06-23 | 2012-01-12 | Hino Motors Ltd | Exhaust purification device |
| CN103670629A (en) * | 2012-09-20 | 2014-03-26 | 北汽福田汽车股份有限公司 | Urea pipe heating control method of selective catalytic reduction (SCR) post-processing system of engine |
| CN203532016U (en) * | 2013-11-04 | 2014-04-09 | 中国重汽集团济南动力有限公司 | Urea spray feeding device with heater |
| CN108425726A (en) * | 2018-03-28 | 2018-08-21 | 吉林大学 | A kind of SCR system heating device and its control method |
| CN110230530A (en) * | 2019-06-28 | 2019-09-13 | 潍柴动力股份有限公司 | The method, apparatus and system of engine SCR system pipeline heating |
| CN110552769A (en) * | 2019-09-18 | 2019-12-10 | 山推工程机械股份有限公司 | Control method of tail gas aftertreatment system and tail gas aftertreatment system |
-
2020
- 2020-07-31 CN CN202010763551.9A patent/CN111963282B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012007511A (en) * | 2010-06-23 | 2012-01-12 | Hino Motors Ltd | Exhaust purification device |
| CN103670629A (en) * | 2012-09-20 | 2014-03-26 | 北汽福田汽车股份有限公司 | Urea pipe heating control method of selective catalytic reduction (SCR) post-processing system of engine |
| CN203532016U (en) * | 2013-11-04 | 2014-04-09 | 中国重汽集团济南动力有限公司 | Urea spray feeding device with heater |
| CN108425726A (en) * | 2018-03-28 | 2018-08-21 | 吉林大学 | A kind of SCR system heating device and its control method |
| CN110230530A (en) * | 2019-06-28 | 2019-09-13 | 潍柴动力股份有限公司 | The method, apparatus and system of engine SCR system pipeline heating |
| CN110552769A (en) * | 2019-09-18 | 2019-12-10 | 山推工程机械股份有限公司 | Control method of tail gas aftertreatment system and tail gas aftertreatment system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107645A (en) * | 2021-04-07 | 2021-07-13 | 东风商用车有限公司 | SCR urea heating unfreezing control system and method |
| CN113107645B (en) * | 2021-04-07 | 2022-01-25 | 东风商用车有限公司 | SCR urea heating unfreezing control system and method |
| CN113969814A (en) * | 2021-09-30 | 2022-01-25 | 东风商用车有限公司 | Control method of urea injection system |
| CN114458424A (en) * | 2022-01-05 | 2022-05-10 | 东风商用车有限公司 | Protection method for electromagnetic valve of urea tank cooling water |
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|---|---|
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