CN110259567B - Control method and system for two-speed electromagnetic clutch water pump - Google Patents
Control method and system for two-speed electromagnetic clutch water pump Download PDFInfo
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- CN110259567B CN110259567B CN201910581294.4A CN201910581294A CN110259567B CN 110259567 B CN110259567 B CN 110259567B CN 201910581294 A CN201910581294 A CN 201910581294A CN 110259567 B CN110259567 B CN 110259567B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
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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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a control method and a system of a two-speed electromagnetic clutch water pump, which are applied to an engine and comprise the following steps: acquiring a warm air starting signal, and acquiring the actual water temperature of the engine and the temperature of a cab; judging whether the cab temperature is lower than a preset driving temperature or not, and if the cab temperature is lower than the preset driving temperature, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature; and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state. According to the technical scheme provided by the invention, the running state of the water pump of the two-speed electromagnetic clutch is reasonably controlled by monitoring the actual water temperature of the engine and the temperature of the cab; and when the temperature of the cab is not less than the preset driving temperature, the water pump of the two-speed electromagnetic clutch is controlled to be in a half-speed running state, so that the aim of saving fuel of the whole vehicle is fulfilled.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a control method and a control system of a two-speed electromagnetic clutch water pump.
Background
The electromagnetic clutch water pump is integrated on the basis of a traditional water pump, when the electromagnetic clutch is electrified, the electromagnetic clutch enables a water pump belt wheel to be disconnected from the water pump, a water pump impeller stops rotating, and cooling liquid stops flowing; when the electromagnetic clutch is powered off, the water pump belt wheel drives the water pump impeller to rotate, and the cooling liquid flows circularly, which is equivalent to a mechanical water pump. The electromagnetic clutch water pump is controlled by an engine ECU (Electronic Control Unit), during warm-up and low-load operation, if the actual water temperature in the engine does not reach a target temperature set value, the electromagnetic clutch is in an electrified state, namely, a water pump impeller stops rotating, and cooling liquid stops flowing, so that the water temperature in the engine can be rapidly increased, the warm-up time is shortened, and the aims of reducing fuel consumption and reducing pollutants are fulfilled. In order to further reduce fuel consumption, research and development personnel developed a two-speed electromagnetic clutch water pump having two modes, a half-speed rotation operating state and a full-speed rotation operating state. However, the existing two-speed electromagnetic clutch water pump is not ideal in control in cold regions, and the purpose of reducing fuel consumption cannot be better achieved.
Disclosure of Invention
In view of the above, the invention provides a control method and a control system for a two-speed electromagnetic clutch water pump, which effectively solve the existing technical problems, and reasonably control the running state of the two-speed electromagnetic clutch water pump by monitoring the actual water temperature of an engine and the temperature of a cab; and when the temperature of the cab is not less than the preset driving temperature, the water pump of the two-speed electromagnetic clutch is controlled to be in a half-speed running state, so that the aim of saving fuel of the whole vehicle is fulfilled.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a control method of a two-speed electromagnetic clutch water pump is applied to an engine and comprises the following steps:
acquiring a warm air starting signal, and acquiring the actual water temperature of the engine and the temperature of a cab;
judging whether the cab temperature is lower than a preset driving temperature or not, and if the cab temperature is lower than the preset driving temperature, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature;
and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state.
Optionally, according to the relation between the actual water temperature of the engine and the preset water temperature, the operation state of the two-speed electromagnetic clutch water pump is controlled, and the operation state includes:
when the actual water temperature is judged to be lower than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a half-speed running state;
and when the actual water temperature is judged to be not less than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a full-speed running state.
Optionally, while starting the engine, the method includes:
judging whether urea thawing is finished or not, and if not, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the opening temperature of an electromagnetic valve of a urea box, wherein the opening temperature of the electromagnetic valve of the urea box is the same as the preset water temperature;
and if the operation is finished, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed operation state.
Optionally, controlling the operating state of the two-speed electromagnetic clutch water pump according to the relationship between the actual water temperature of the engine and the opening temperature of the electromagnetic valve of the urea tank includes:
when the actual water temperature is judged to be lower than the opening temperature of the electromagnetic valve of the urea box, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state;
and controlling the water pump of the two-speed electromagnetic clutch to be in a full-speed running state when the actual water temperature is judged to be not less than the opening temperature of the electromagnetic valve of the urea box.
Optionally, when the cab temperature is not less than the preset driving temperature and the urea thawing is completed, the two-speed electromagnetic clutch water pump is controlled to be in a half-speed running state.
Correspondingly, the invention also provides a control system of the two-speed electromagnetic clutch water pump, which is applied to an engine and comprises the following components:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a warm air starting signal and acquiring the actual water temperature and the cab temperature of the engine;
the first processing module is used for judging whether the cab temperature is lower than a preset driving temperature or not, and controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature if the cab temperature is lower than the preset driving temperature;
and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state.
Optionally, the first processing module controls the operating state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and a preset water temperature, and includes:
when the first processing module judges that the actual water temperature is lower than the preset water temperature, the first processing module controls the two-speed electromagnetic clutch water pump to be in a half-speed running state;
and when the first processing module judges that the actual water temperature is not less than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a full-speed running state.
Optionally, the control system includes:
the second processing module is used for judging whether urea thawing is finished or not while the engine is started, and if the urea thawing is not finished, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the opening temperature of a urea box electromagnetic valve, wherein the opening temperature of the urea box electromagnetic valve is the same as the preset water temperature;
and if the operation is finished, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed operation state.
Optionally, the second processing module controls the operating state of the two-speed electromagnetic clutch water pump according to the relationship between the actual water temperature of the engine and the opening temperature of the electromagnetic valve of the urea tank, and includes:
the second processing module controls the water pump of the two-speed electromagnetic clutch to be in a half-speed running state when judging that the actual water temperature is lower than the starting temperature of the electromagnetic valve of the urea box;
and when the second processing module judges that the actual water temperature is not less than the opening temperature of the electromagnetic valve of the urea box, the second processing module controls the water pump of the two-speed electromagnetic clutch to be in a full-speed running state.
Optionally, when the first processing module determines that the cab temperature is not less than the preset driving temperature and the second processing module determines that the urea thawing is completed, the two-speed electromagnetic clutch water pump is controlled to be in a half-speed running state.
Compared with the prior art, the technical scheme provided by the invention at least has the following advantages:
the invention provides a control method and a system of a two-speed electromagnetic clutch water pump, which are applied to an engine and comprise the following steps: acquiring a warm air starting signal, and acquiring the actual water temperature of the engine and the temperature of a cab; judging whether the cab temperature is lower than a preset driving temperature or not, and if the cab temperature is lower than the preset driving temperature, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature; and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state. According to the technical scheme, the running state of the water pump of the two-speed electromagnetic clutch is reasonably controlled by monitoring the actual water temperature of the engine and the temperature of the cab; and when the temperature of the cab is not less than the preset driving temperature, the water pump of the two-speed electromagnetic clutch is controlled to be in a half-speed running state, so that the aim of saving fuel of the whole vehicle is fulfilled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a control method of a two-speed electromagnetic clutch water pump according to an embodiment of the present disclosure;
fig. 2 is a flowchart of another control method for a water pump of a two-speed electromagnetic clutch according to an embodiment of the present disclosure;
fig. 3 is a flowchart of a control method for a water pump of a two-speed electromagnetic clutch according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a control method for a water pump of a two-speed electromagnetic clutch according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background, in order to further reduce fuel consumption, developers have developed two-speed electromagnetic clutch water pumps having two modes, a half-speed rotation operation mode and a full-speed rotation operation mode; and the rotating speed of the water pump impeller in the half-speed rotating running state is lower than that in the full-speed rotating running state. However, the existing two-speed electromagnetic clutch water pump is not ideal in control in cold regions, and the purpose of reducing fuel consumption cannot be better achieved.
Specifically, when the whole vehicle runs in a cold area, the driver's cab defrosting is finished within 40min after the whole vehicle runs under a certain low-temperature environment and runs under corresponding working conditions according to regulations, and the defrosting capacity of the driver's cab depends on the water temperature of an engine and the water flow rate of a fan heater leading to the whole vehicle driver's cab. At present, the water pump speed of the two-speed electromagnetic clutch is judged to be the water temperature of an engine, and the method of determining the full rotation and the half rotation of the water pump only through the water temperature is not suitable for the requirement of heating of a cab in a cold region. In addition, the emission regulation of the national six diesel engine also makes a regulation on the post-treatment thawing heating capacity of the diesel engine in cold regions, and the regulation requires that the thawing of the post-treatment is completed within 70min of the regulation to realize urea injection. The thawing speed of the urea box is also not only dependent on the temperature of the cooling liquid flowing into the urea box, but also has a direct relation with the water flow flowing into the urea box.
Based on the above, the embodiment of the application provides a control method and a control system for a two-speed electromagnetic clutch water pump, which effectively solve the existing technical problems and reasonably control the running state of the two-speed electromagnetic clutch water pump by monitoring the actual water temperature of an engine and the temperature of a cab; and when the temperature of the cab is not less than the preset driving temperature, the water pump of the two-speed electromagnetic clutch is controlled to be in a half-speed running state, so that the aim of saving fuel of the whole vehicle is fulfilled. To achieve the above object, the technical solutions provided by the embodiments of the present application are described in detail below, specifically with reference to fig. 1 to 4.
Referring to fig. 1, a flowchart of a control method for a two-speed electromagnetic clutch water pump according to an embodiment of the present application is shown, where the control method for the two-speed electromagnetic clutch water pump is applied to an engine, and includes:
s11, acquiring a warm air starting signal, and acquiring the actual water temperature and the cab temperature of the engine;
s12, judging whether the cab temperature is lower than a preset driving temperature or not, and if the cab temperature is lower than the preset driving temperature, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature;
and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state.
In an embodiment of the present application, referring to fig. 2, a flowchart of another method for controlling a two-speed electromagnetic clutch water pump according to an embodiment of the present application, where the method for controlling an operating state of the two-speed electromagnetic clutch water pump according to a relationship between an actual water temperature of an engine and a preset water temperature includes:
when the actual water temperature is judged to be lower than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a half-speed running state;
and when the actual water temperature is judged to be not less than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a full-speed running state.
According to the technical scheme, the two-speed electromagnetic clutch is controlled based on the actual water temperature of the engine, the judgment conditions of the warm air starting signal and the cab temperature are introduced, the two-speed electromagnetic clutch is controlled based on the actual water temperature of the engine, the warm air starting signal and the cab temperature, and the purposes of heating and defrosting the cab and saving fuel are achieved.
Specifically, after the engine is started, when a driver presses a warm air switch, the engine ECU acquires a warm air starting signal and considers that the driver has a heating and defrosting requirement, and if the actual water temperature of the engine collected by the engine ECU is lower than the preset water temperature, the water pump of the two-speed electromagnetic clutch is controlled to keep a half-speed running state at the moment in order to raise the water temperature in the engine as soon as possible and save fuel oil; and then, when the collected actual water temperature of the engine is not less than the preset water temperature, in order to achieve the purpose of heating and defrosting the cab as soon as possible, the water flow flowing into the warm air blower needs to be increased, and at the moment, the water pump of the two-speed electromagnetic clutch is controlled to be in a full-speed running state. And when the engine ECU monitors that the cab temperature is not less than the preset driving temperature, the engine ECU judges that the heating and defrosting functions are finished, and controls the water pump of the two-speed electromagnetic clutch to recover the half-speed running state in order to reduce the fuel consumption of the whole vehicle.
Further, while starting the engine, the law requires that the urea thawing is completed within 70min, and referring to fig. 3, a flowchart of a control method of a two-speed electromagnetic clutch water pump provided in the embodiment of the present application is provided, where while starting the engine, the method includes:
s21, judging whether urea thawing is finished or not, and if not, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the opening temperature of an electromagnetic valve of a urea box, wherein the opening temperature of the electromagnetic valve of the urea box is the same as the preset water temperature;
and if the operation is finished, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed operation state.
In an embodiment of the present application, referring to fig. 4, a flowchart of a method for controlling a two-speed electromagnetic clutch water pump according to an embodiment of the present application is provided, where the method for controlling the two-speed electromagnetic clutch water pump according to a relationship between an actual water temperature of an engine and an opening temperature of an electromagnetic valve of a urea tank includes:
when the actual water temperature is judged to be lower than the opening temperature of the electromagnetic valve of the urea box, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state;
and controlling the water pump of the two-speed electromagnetic clutch to be in a full-speed running state when the actual water temperature is judged to be not less than the opening temperature of the electromagnetic valve of the urea box.
The method comprises the steps that after an engine is started, the actual water temperature of the engine is collected, and when the actual water temperature of the engine is lower than the starting temperature of an electromagnetic valve of a urea box, in order to raise the water temperature as soon as possible and save fuel consumption of a whole vehicle, a water pump of a two-speed electromagnetic clutch is controlled to run at half speed; when the actual water temperature of the engine is not less than the opening temperature of the electromagnetic valve of the urea box, the engine cooling liquid starts to flow into the urea box at the moment so as to heat the urea box, in order to improve the unfreezing heating speed, the water flow entering the urea box needs to be increased, at the moment, the water pump of the two-speed electromagnetic clutch is controlled to run at full speed, and the water flow flowing into the urea box is increased; when the urea is thawed, the water pump of the two-speed electromagnetic clutch is controlled to run at half speed, so that fuel oil of the whole vehicle is saved.
It should be noted that, when the heating and defrosting of the cab and the defrosting of the urea tank provided by the embodiment of the present application are performed simultaneously, when the temperature of the cab is not less than the preset driving temperature and the urea defrosting is completed, the two-speed electromagnetic clutch water pump is controlled to be in a half-speed running state; and if any one of the conditions that the urea is thawed and the temperature of the cab is not less than the preset driving temperature is not achieved, continuing to control the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature or the opening temperature of the urea box electromagnetic valve.
Correspondingly, this application embodiment still provides a control system of two speed electromagnetic clutch water pump, is applied to the engine, and control system of two speed electromagnetic clutch water pump includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a warm air starting signal and acquiring the actual water temperature and the cab temperature of the engine;
the first processing module is used for judging whether the cab temperature is lower than a preset driving temperature or not, and controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature if the cab temperature is lower than the preset driving temperature;
and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state.
In an embodiment of the present application, the first processing module provided in the present application controls an operation state of the two-speed electromagnetic clutch water pump according to a relation between an actual water temperature of the engine and a preset water temperature, including:
when the first processing module judges that the actual water temperature is lower than the preset water temperature, the first processing module controls the two-speed electromagnetic clutch water pump to be in a half-speed running state;
and when the first processing module judges that the actual water temperature is not less than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a full-speed running state.
According to the technical scheme, the two-speed electromagnetic clutch is controlled based on the actual water temperature of the engine, the judgment conditions of the warm air starting signal and the cab temperature are introduced, the two-speed electromagnetic clutch is controlled based on the actual water temperature of the engine, the warm air starting signal and the cab temperature, and the purposes of heating and defrosting the cab and saving fuel are achieved.
Specifically, after the engine is started, when a driver presses a warm air switch, the engine ECU acquires a warm air starting signal and considers that the driver has a heating and defrosting requirement, and if the actual water temperature of the engine collected by the engine ECU is lower than the preset water temperature, the water pump of the two-speed electromagnetic clutch is controlled to keep a half-speed running state at the moment in order to raise the water temperature in the engine as soon as possible and save fuel oil; and then, when the collected actual water temperature of the engine is not less than the preset water temperature, in order to achieve the purpose of heating and defrosting the cab as soon as possible, the water flow flowing into the warm air blower needs to be increased, and at the moment, the water pump of the two-speed electromagnetic clutch is controlled to be in a full-speed running state. And when the engine ECU monitors that the cab temperature is not less than the preset driving temperature, the engine ECU judges that the heating and defrosting functions are finished, and controls the water pump of the two-speed electromagnetic clutch to recover the half-speed running state in order to reduce the fuel consumption of the whole vehicle.
Further, when starting the engine, the urea thawing is required to be completed within 70min by law, and the control system provided by the embodiment of the application comprises:
the second processing module is used for judging whether urea thawing is finished or not while the engine is started, and if the urea thawing is not finished, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the opening temperature of a urea box electromagnetic valve, wherein the opening temperature of the urea box electromagnetic valve is the same as the preset water temperature;
and if the operation is finished, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed operation state.
In an embodiment of the present application, the second processing module provided in the present application controls an operation state of the two-speed electromagnetic clutch water pump according to a relationship between an actual water temperature of the engine and an opening temperature of an electromagnetic valve of a urea tank, including:
the second processing module controls the water pump of the two-speed electromagnetic clutch to be in a half-speed running state when judging that the actual water temperature is lower than the starting temperature of the electromagnetic valve of the urea box;
and when the second processing module judges that the actual water temperature is not less than the opening temperature of the electromagnetic valve of the urea box, the second processing module controls the water pump of the two-speed electromagnetic clutch to be in a full-speed running state.
The method comprises the steps that after an engine is started, the actual water temperature of the engine is collected, and when the actual water temperature of the engine is lower than the starting temperature of an electromagnetic valve of a urea box, in order to raise the water temperature as soon as possible and save fuel consumption of a whole vehicle, a water pump of a two-speed electromagnetic clutch is controlled to run at half speed; when the actual water temperature of the engine is not less than the opening temperature of the electromagnetic valve of the urea box, the engine cooling liquid starts to flow into the urea box at the moment so as to heat the urea box, in order to improve the unfreezing heating speed, the water flow entering the urea box needs to be increased, at the moment, the water pump of the two-speed electromagnetic clutch is controlled to run at full speed, and the water flow flowing into the urea box is increased; when the urea is thawed, the water pump of the two-speed electromagnetic clutch is controlled to run at half speed, so that fuel oil of the whole vehicle is saved.
In an embodiment of the application, the first processing module determines that the cab temperature is not less than the preset driving temperature, and the second processing module determines that the urea is thawed and completed, and then the two-speed electromagnetic clutch water pump is controlled to be in a half-speed running state.
It should be noted that, when the heating and defrosting of the cab and the defrosting of the urea tank provided by the embodiment of the present application are performed simultaneously, when the temperature of the cab is not less than the preset driving temperature and the urea defrosting is completed, the two-speed electromagnetic clutch water pump is controlled to be in a half-speed running state; and if any one of the conditions that the urea is thawed and the temperature of the cab is not less than the preset driving temperature is not achieved, continuing to control the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature or the opening temperature of the urea box electromagnetic valve.
The embodiment of the application provides a control method and a control system of a two-speed electromagnetic clutch water pump, which are applied to an engine and comprise the following steps: acquiring a warm air starting signal, and acquiring the actual water temperature of the engine and the temperature of a cab; judging whether the cab temperature is lower than a preset driving temperature or not, and if the cab temperature is lower than the preset driving temperature, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature; and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state. According to the technical scheme, the running state of the water pump of the two-speed electromagnetic clutch is reasonably controlled by monitoring the actual water temperature of the engine and the temperature of the cab; and when the temperature of the cab is not less than the preset driving temperature, the water pump of the two-speed electromagnetic clutch is controlled to be in a half-speed running state, so that the aim of saving fuel of the whole vehicle is fulfilled.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control method of a two-speed electromagnetic clutch water pump is applied to an engine and is characterized by comprising the following steps:
acquiring a warm air starting signal, and acquiring the actual water temperature of the engine and the temperature of a cab;
judging whether the cab temperature is lower than a preset driving temperature or not, and if the cab temperature is lower than the preset driving temperature, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature;
and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state.
2. The method for controlling a two-speed electromagnetic clutch water pump according to claim 1, wherein controlling the operating state of the two-speed electromagnetic clutch water pump according to the relationship between the actual water temperature of the engine and a preset water temperature comprises:
when the actual water temperature is judged to be lower than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a half-speed running state;
and when the actual water temperature is judged to be not less than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a full-speed running state.
3. The method of controlling a two-speed electromagnetic clutch water pump of claim 1, while starting the engine, comprising:
judging whether urea thawing is finished or not, and if not, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the opening temperature of an electromagnetic valve of a urea box, wherein the opening temperature of the electromagnetic valve of the urea box is the same as the preset water temperature;
and if the operation is finished, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed operation state.
4. The method for controlling a two-speed electromagnetic clutch water pump according to claim 3, wherein controlling the operating state of the two-speed electromagnetic clutch water pump according to the relationship between the actual water temperature of the engine and the opening temperature of a urea tank solenoid valve comprises:
when the actual water temperature is judged to be lower than the opening temperature of the electromagnetic valve of the urea box, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state;
and controlling the water pump of the two-speed electromagnetic clutch to be in a full-speed running state when the actual water temperature is judged to be not less than the opening temperature of the electromagnetic valve of the urea box.
5. The method for controlling a two-speed electromagnetic clutch water pump according to claim 3, characterized in that when the cab temperature is not less than the preset driving temperature and when the urea thawing is completed, the two-speed electromagnetic clutch water pump is controlled to be in a half-speed operation state.
6. The utility model provides a control system of two speed electromagnetic clutch water pump, is applied to the engine, its characterized in that includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a warm air starting signal and acquiring the actual water temperature and the cab temperature of the engine;
the first processing module is used for judging whether the cab temperature is lower than a preset driving temperature or not, and controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the preset water temperature if the cab temperature is lower than the preset driving temperature;
and if the cab temperature is not less than the preset driving temperature, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed running state.
7. The control system of claim 6, wherein the first processing module controls the operating state of the two-speed electromagnetic clutch water pump according to a relationship between an actual water temperature of the engine and a preset water temperature, and comprises:
when the first processing module judges that the actual water temperature is lower than the preset water temperature, the first processing module controls the two-speed electromagnetic clutch water pump to be in a half-speed running state;
and when the first processing module judges that the actual water temperature is not less than the preset water temperature, controlling the two-speed electromagnetic clutch water pump to be in a full-speed running state.
8. The control system of a two-speed electromagnetic clutch water pump of claim 6, comprising:
the second processing module is used for judging whether urea thawing is finished or not while the engine is started, and if the urea thawing is not finished, controlling the running state of the two-speed electromagnetic clutch water pump according to the relation between the actual water temperature of the engine and the opening temperature of a urea box electromagnetic valve, wherein the opening temperature of the urea box electromagnetic valve is the same as the preset water temperature;
and if the operation is finished, controlling the water pump of the two-speed electromagnetic clutch to be in a half-speed operation state.
9. The control system of claim 8, wherein the second processing module controls the operating state of the two-speed electromagnetic clutch water pump based on a relationship between an actual water temperature of the engine and an opening temperature of a urea tank solenoid valve, comprising:
the second processing module controls the water pump of the two-speed electromagnetic clutch to be in a half-speed running state when judging that the actual water temperature is lower than the starting temperature of the electromagnetic valve of the urea box;
and when the second processing module judges that the actual water temperature is not less than the opening temperature of the electromagnetic valve of the urea box, the second processing module controls the water pump of the two-speed electromagnetic clutch to be in a full-speed running state.
10. The control system of claim 8, wherein when the first processing module determines that the cab temperature is not less than the preset driving temperature and when the second processing module determines that the urea thawing is complete, the two-speed electromagnetic clutch water pump is controlled to be in a half-speed running state.
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| CN110671187B (en) * | 2019-09-30 | 2020-10-30 | 潍柴动力股份有限公司 | Cooling control method, control device and control system for engine in vehicle |
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| CN105539065B (en) * | 2015-12-21 | 2018-08-10 | 浙江工商大学 | Automobile engine waste heat recycles air conditioning control method |
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