CN114992009A - Automatic preheating system of diesel engine and working method thereof - Google Patents
Automatic preheating system of diesel engine and working method thereof Download PDFInfo
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- CN114992009A CN114992009A CN202210781045.1A CN202210781045A CN114992009A CN 114992009 A CN114992009 A CN 114992009A CN 202210781045 A CN202210781045 A CN 202210781045A CN 114992009 A CN114992009 A CN 114992009A
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- preheating
- diesel engine
- ecu
- relay
- heater
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- 238000000034 method Methods 0.000 title claims description 8
- 239000002826 coolant Substances 0.000 claims abstract description 41
- 239000000110 cooling liquid Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 3
- 239000007788 liquid Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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Classifications
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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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
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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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention relates to the technical field of engines, and discloses an automatic preheating system of a diesel engine, which comprises a heater, a preheating relay, a fuse, a storage battery, a coolant temperature sensor, an ECU (electronic control unit) and a preheating indicator lamp, wherein the heater is arranged in an air inlet system of the diesel engine; the temperature sensor of the cooling liquid is arranged in a cooling system of the diesel engine, and the preheating indicator lamp is arranged on a driving platform of the whole vehicle; the ECU is an engine controller; preheating relay, coolant temperature sensor and preheating pilot lamp all with ECU electric connection, ECU is supplied power by the battery, preheating relay passes through fuse and battery electric connection preheating relay and heater electric connection. It can carry out different preheating time length to air intake system according to the coolant liquid temperature that detects, implements more accurately, practices thrift the electric quantity more, solves driver manual control's randomness, nondeterminacy problem.
Description
The technical field is as follows:
the invention relates to the technical field of engines, in particular to an automatic preheating system of a diesel engine.
Background art:
when a diesel engine is started in a low-temperature environment, air heating is usually required for auxiliary starting. Usually, the preheating system is manually controlled by a driver, and the preheating time of the air intake system cannot be corrected through the cooling water temperature, if the preheating time is too short when the temperature is too low, the effect of auxiliary starting cannot be achieved; if the preheating time is too long, the large electricity consumption will affect the power of the starter, thereby affecting the starting performance of the engine. The manual control of the driver is completely operated according to the past experience, and the randomness is high.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide an automatic preheating system of a diesel engine, which can carry out different preheating time lengths on an air inlet system according to the detected temperature of cooling liquid, is more accurate to implement, saves more electric quantity and solves the problems of randomness and uncertainty of manual control of a driver.
The scheme for solving the technical problems is as follows:
an automatic preheating system of a diesel engine comprises a heater, a preheating relay, a fuse, a storage battery, a coolant temperature sensor, an ECU and a preheating indicator lamp, wherein the heater is arranged in an air inlet system of the diesel engine; the cooling liquid temperature sensor is arranged in a cooling system of the diesel engine, and the preheating indicator lamp is arranged on a driving platform of the whole vehicle; the ECU is an engine controller;
preheating relay, coolant temperature sensor and preheating pilot lamp all with ECU electric connection, ECU is supplied power by the battery, preheating relay passes through fuse and battery electric connection preheating relay and heater electric connection.
The preheating relay and the fuse are arranged in the electric appliance box of the whole vehicle;
the storage battery and the ECU are installed on the whole vehicle frame.
The storage battery, the ECU and the preheating indicator lamp are connected through a circuit to form a loop, and the state of the preheating indicator lamp is controlled by the ECU.
The preheating relay is divided into a control end and a working end, the control end of the preheating relay is connected with the storage battery and the ECU through circuits to form a loop, and the disconnection/attraction state of the control end of the preheating relay is controlled by the ECU;
the working end of the preheating relay is connected with the heater, the storage battery and the fuse by circuits to form a loop, and the state of the loop is controlled by the control end of the preheater.
The heater is an electric heating grid which is fixed in an air inlet main pipe of the diesel engine air inlet system.
The heater is a glow plug which is fixed on a cylinder cover of the diesel engine, and a heating end of the glow plug extends into the cylinder hole.
The pre-heat indicator light is integrated into the meter.
A working method of an automatic preheating system of a diesel engine comprises the steps that a coolant temperature sensor can collect coolant temperature T of the diesel engine in real time, collected temperature values are transmitted to an ECU, preheating duration time T1, T2 and T3 corresponding to the temperature T1, the temperature T2, the temperature T3, the temperature T1, the temperature T2 and the temperature T3 are contained in a preset program in the ECU, T1 is greater than T2 and less than T3, and T1 is greater than T2 and greater than T3; the ECU controls the closing of the control end of the preheating relay and controls the lighting of the preheating indicator lamp at the same time according to the comparison of the input cooling liquid temperature value T with T1, T2 and T3 and the internal preset program logic; the working end of the preheating relay is closed under the control of the control end of the preheating relay, a circuit between the heater and the storage battery is conducted, and the heater starts to work; and when the working time set in the preset program in the ECU is reached, the ECU controls the control end of the preheating relay to be disconnected, and simultaneously controls the preheating indicator lamp to be turned off to finish the preheating process.
When the coolant temperature sensor collects that the coolant temperature of the diesel engine is Ta and Ta is less than T1, the preheating duration of the diesel engine is executed according to Ta;
when the cooling liquid temperature sensor collects the cooling liquid temperature Tb of the diesel engine, and T1 is not less than Tb and is less than T2, the preheating duration Tb of the diesel engine is calculated according to interpolation between T1 and T2, and Tb is T1+ (T2-T1)/(T2-T1) (Tb-T1);
when the cooling liquid temperature sensor collects the cooling liquid temperature Tc of the diesel engine, and T2 is not less than Tc and is less than T3, the preheating duration Tc of the diesel engine is calculated according to interpolation between T2 and T3, and Tc is T2+ (T3-T2)/(T3-T2) and is (Tc-T2);
when the coolant temperature sensor collects the diesel coolant temperature Td and T3 is smaller than or equal to Td, the diesel preheating duration Td is calculated according to the same slope of the speed increase from T1 to T3, and the Td is T1+ (T3-T1)/(T3-T1) (Td-T1).
The value of ta is a fixed value;
when Td is T1+ (T3-T1)/(T3-T1) (Td-T1) is less than or equal to 0, the diesel engine is not preheated.
The invention has the prominent effects that:
compared with the prior art, the preheating system is controlled by the ECU, so that the influence of different operation habits of a driver on the preheating time is avoided;
2. different preheating time lengths can be executed under the control of the ECU according to different cooling liquid temperatures, so that the implementation is more accurate;
3. preheating time lengths at different cooling liquid temperatures stored in the ECU can be calibrated, and can be set and adjusted according to the early-stage test result;
4. the preheating indicating lamp can prompt the working state of the preheating system so as to achieve the purpose of reminding a driver.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a control flow diagram of the method of operation of the present invention;
fig. 3 is a diagram illustrating the temperature of the coolant according to the present invention in relation to the preheating period of the intake system.
The specific implementation mode is as follows:
in an embodiment, as shown in fig. 1 to 3, an automatic preheating system for a diesel engine includes a heater, a preheating relay, a fuse, a battery, a coolant temperature sensor, an ECU, and a preheating indicator lamp, wherein: the heater is arranged in an air inlet system of the diesel engine; the temperature sensor of the cooling liquid is arranged in a cooling system of the diesel engine, and the preheating indicator lamp is arranged on a driving platform of the whole vehicle; the ECU is an engine controller;
preheating relay, coolant temperature sensor and preheating pilot lamp all with ECU electric connection, ECU is supplied power by the battery, preheating relay passes through fuse and battery electric connection preheating relay and heater electric connection.
Furthermore, the preheating relay and the fuse are arranged in the electric appliance box of the whole vehicle;
the storage battery and the ECU are installed on the whole vehicle frame.
Furthermore, the storage battery, the ECU and the preheating indicating lamp are connected by a circuit to form a loop, and the state of the preheating indicating lamp is controlled by the ECU.
Furthermore, the preheating relay is divided into a control end and a working end, the control end of the preheating relay is connected with the storage battery and the ECU through circuits to form a loop, and the disconnection/attraction state of the control end of the preheating relay is controlled by the ECU;
the working end of the preheating relay is connected with the heater, the storage battery and the fuse by circuits to form a loop, and the state of the loop is controlled by the control end of the preheater.
Furthermore, the heater is an electric heating grid which is fixed in an air inlet main pipe of the air inlet system of the diesel engine.
Furthermore, the heater is a glow plug which is fixed on a cylinder cover of the diesel engine, and a heating end of the glow plug extends into the cylinder hole.
Still further, the warmup indicator light is integrated into the meter.
A working method of an automatic preheating system of a diesel engine comprises the steps that a coolant temperature sensor can collect coolant temperature T of the diesel engine in real time, collected temperature values are transmitted to an ECU, preheating duration time T1, T2 and T3 corresponding to the temperature T1, the temperature T2, the temperature T3, the temperature T1, the temperature T2 and the temperature T3 are contained in a preset program in the ECU, T1 is greater than T2 and less than T3, and T1 is greater than T2 and greater than T3; the duration of T1, T2, T3 is determined by tests at temperatures T1, T2, T3;
the ECU controls the closing of the control end of the preheating relay and controls the lighting of the preheating indicator lamp at the same time according to the comparison of the input temperature value T of the cooling liquid with T1, T2 and T3 and the internal preset program logic; the working end of the preheating relay is closed under the control of the control end of the preheating relay, an electric loop between the heater and the storage battery is conducted, and the heater starts to work; when the working time set in the preset program in the ECU is reached, the ECU controls the control end of the preheating relay to be disconnected, and simultaneously controls the preheating indicator lamp to be turned off to finish the preheating process.
Furthermore, when the coolant temperature sensor collects that the temperature of the diesel engine coolant is Ta and Ta is less than T1, the preheating duration of the diesel engine is executed according to Ta;
when the coolant temperature sensor acquires the diesel engine coolant temperature Tb, and T1 is not more than Tb and is less than T2, interpolating the diesel engine preheating duration Tb according to a distance between T1 and T2, namely, coordinate point (Tb, Tb) is on a straight line segment on a coordinate graph consisting of the coolant temperature at point (T1, T1), point (T2, T2) and the air intake system preheating time period, wherein the slope of the straight line segment is k1, and Tb (T2-T1)/(T2-T1) (Tb-T1)/(Tb-T1) is obtained according to a slope k1, so that Tb (T82 1+ (T2-T1)/(T2-T1) (Tb-T1) is obtained;
when the coolant temperature sensor acquires the temperature Tc of the diesel coolant, and T2 is not more than Tc and is less than T3, the diesel preheating duration Tc is calculated according to an interpolation between T2 and T3, namely on a straight line segment on a coordinate graph formed by the coolant temperature and the air intake system preheating duration, wherein a point (Tc, Tc) is a point (T2, T2) and a point (T3, T3), the slope of the straight line segment is k2, Tc is obtained according to the slope k2, (T3-T2)/(T3-T2) ═ Tc-T2)/(Tc-T2), and Tc-T2 + (T3-T2)/(T3-T2) (Tc-T2) is obtained;
when the coolant temperature sensor acquires the diesel coolant temperature Td and T3 is not more than Td, the diesel preheating duration Td is calculated according to the same slope of the speed increase from T1 to T3, namely, the slope of a straight line on a coordinate graph formed by the coolant temperature where a point (T1, T1) and a point (T3, T3) are located and the air intake system preheating time length is k3, and Td is obtained according to the slope k3, (T3-T1)/(T3-T1) (Td-T1)/(Td-T1), so that Td is T1+ (T3-T1)/(T3-T1) (Td-T1).
More specifically, the value of ta is a fixed value;
when Td is T1+ (T3-T1)/(T3-T1) (Td-T1) is less than or equal to 0, the diesel engine is not preheated.
The working principle is as follows: when the diesel engine needs to be started, the coolant temperature sensor transmits a signal to the ECU according to the coolant temperature T collected by the coolant temperature sensor, and the ECU judges whether the detected coolant temperature T is less than T1, between T1 and T2, between T2 and T3 or more than T3;
when the detected temperature T (marked as Ta) of the cooling liquid is less than T1, the ECU controls the closing of the control end of the preheating relay and controls the turning-on of the preheating indicator lamp at the same time; the working end of the preheating relay is closed under the control of the control end of the preheating relay, a circuit between the heater and the storage battery is conducted, the heater starts to work and heats the air inlet system, and the preheating time length (namely the closing time length of the preheating relay and the lighting time length of the preheating indicator lamp) in the state is ta which is a fixed value;
when the detected temperature T (recorded as Tb) of the cooling liquid is between T1 and T2, namely T1 is more than or equal to Tb and less than T2, the ECU controls the closing of the control end of the preheating relay and controls the lighting of the preheating indicator lamp at the same time; the working end of the preheating relay is closed under the control of the control end of the preheating relay, an electric loop between the heater and the storage battery is conducted, the heater starts to work and heats the air inlet system, and the preheating time length (namely the closing time length of the preheating relay and the lighting time length of the preheating indicator lamp) in the state is Tb which is T1+ (T2-T1)/(T2-T1) and Tb-T1;
when the detected temperature T (recorded as Tc) of the cooling liquid is between T2 and T3, namely T2 is equal to or more than Tc and is less than T3, the ECU controls the control end of the preheating relay to be closed, and simultaneously controls the preheating indicator lamp to be lightened; the working end of the preheating relay is closed under the control of the control end of the preheating relay, an electric loop between the heater and the storage battery is conducted, the heater starts to work, the heater heats the air inlet system, and the preheating time length (namely the closing time length of the preheating relay and the lighting time length of the preheating indicator lamp) in the state is Tc which is T2+ (T3-T2)/(T3-T2) and Tc-T2;
when the detected temperature T (recorded as Td) of the cooling liquid is between T2 and T3, namely T3 < Td, the ECU controls the preheating relay control end to be closed and controls the preheating indicator lamp to be lightened; the working end of the preheating relay is closed under the control of the control end of the preheating relay, an electric loop between the heater and the storage battery is conducted, the heater starts to work, the heater heats the air inlet system, and the preheating time length (namely the closing time length of the preheating relay and the lighting time length of the preheating indicator lamp) in the state is Td which is T1+ (T3-T1)/(T3-T1) and Td-T1; when td is less than or equal to 0, the diesel engine is not preheated.
Finally, the above embodiments are only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. The utility model provides an automatic preheating system of diesel engine, includes heater, preheating relay, fuse, battery, coolant temperature sensor, ECU, preheating pilot lamp, its characterized in that: the heater is arranged in an air inlet system of the diesel engine; the cooling liquid temperature sensor is arranged in a cooling system of the diesel engine, and the preheating indicator lamp is arranged on a driving platform of the whole vehicle;
preheating relay, coolant temperature sensor and preheating pilot lamp all with ECU electric connection, ECU is supplied power by the battery, preheating relay passes through fuse and battery electric connection preheating relay and heater electric connection.
2. The automatic preheating system of the diesel engine according to claim 1, characterized in that: the preheating relay and the fuse are arranged in the electric appliance box of the whole vehicle;
the storage battery and the ECU are installed on the whole vehicle frame.
3. The automatic preheating system of the diesel engine according to claim 1, characterized in that: the storage battery, the ECU and the preheating indicator lamp are connected through a circuit to form a loop, and the state of the preheating indicator lamp is controlled by the ECU.
4. The automatic preheating system of the diesel engine according to claim 1, characterized in that: the preheating relay is divided into a control end and a working end, the control end of the preheating relay is connected with the storage battery and the ECU through circuits to form a loop, and the disconnection/attraction state of the control end of the preheating relay is controlled by the ECU;
the working end of the preheating relay is connected with the heater, the storage battery and the fuse through circuits to form a loop, and the state of the loop is controlled by the control end of the preheater.
5. The automatic preheating system of the diesel engine according to claim 1, characterized in that: the heater is an electric heating grid which is fixed in an air inlet main pipe of the diesel engine air inlet system.
6. The automatic preheating system of the diesel engine according to claim 1, characterized in that: the heater is a glow plug which is fixed on a cylinder cover of the diesel engine, and a heating end of the glow plug extends into the cylinder hole.
7. The automatic preheating system of the diesel engine according to claim 1, characterized in that: the warmup indicator light is integrated in the meter.
8. The operating method of an automatic preheating system of a diesel engine according to any one of claims 1 to 7, characterized in that: the coolant temperature sensor can collect the coolant temperature T of the diesel engine in real time, and transmits the collected temperature value to the ECU, the preheating duration time T1, T2 and T3 corresponding to the temperatures T1, T2 and T3 and the temperatures T1, T2 and T3 are contained in a preset program in the ECU, T1 is more than T2 and less than T3, and T1 is more than T2 and more than T3; the ECU controls the closing of the control end of the preheating relay and controls the lighting of the preheating indicator lamp at the same time according to the comparison of the input cooling liquid temperature value T with T1, T2 and T3 and the internal preset program logic; the working end of the preheating relay is closed under the control of the control end of the preheating relay, a circuit between the heater and the storage battery is conducted, and the heater starts to work; when the working time set in the preset program in the ECU is reached, the ECU controls the control end of the preheating relay to be disconnected, and simultaneously controls the preheating indicator lamp to be turned off to finish the preheating process.
9. The operating method of an automatic preheating system of a diesel engine according to claim 8, characterized in that: when the coolant temperature sensor collects that the coolant temperature of the diesel engine is Ta and Ta is less than T1, the preheating duration of the diesel engine is executed according to Ta;
when the coolant temperature sensor collects the coolant temperature Tb of the diesel engine, and Tb is less than T2 when T1 is equal to or more than Tb, the preheating duration Tb of the diesel engine is calculated according to interpolation between T1 and T2, and Tb is T1+ (T2-T1)/(T2-T1) (Tb-T1);
when the cooling liquid temperature sensor collects the cooling liquid temperature Tc of the diesel engine, and T2 is not less than Tc and is less than T3, the preheating duration Tc of the diesel engine is calculated according to interpolation between T2 and T3, and Tc is T2+ (T3-T2)/(T3-T2) and is (Tc-T2);
when the coolant temperature sensor collects the diesel coolant temperature Td and T3 is less than or equal to Td, the diesel warm-up duration Td is calculated according to the same slope of the speed increase from T1 to T3, and Td is T1+ (T3-T1)/(T3-T1) (Td-T1).
10. The operating method of an automatic preheating system of a diesel engine according to claim 9, characterized in that: the value of ta is a fixed value;
when Td is T1+ (T3-T1)/(T3-T1) (Td-T1) is less than or equal to 0, the diesel engine is not preheated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210781045.1A CN114992009A (en) | 2022-07-04 | 2022-07-04 | Automatic preheating system of diesel engine and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210781045.1A CN114992009A (en) | 2022-07-04 | 2022-07-04 | Automatic preheating system of diesel engine and working method thereof |
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| CN114992009A true CN114992009A (en) | 2022-09-02 |
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| CN202210781045.1A Pending CN114992009A (en) | 2022-07-04 | 2022-07-04 | Automatic preheating system of diesel engine and working method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134444A (en) * | 2015-09-01 | 2015-12-09 | 东风朝阳朝柴动力有限公司 | Diesel engine automatic preheating device |
| CN112253342A (en) * | 2020-09-30 | 2021-01-22 | 中联重科股份有限公司 | Engine cold start warm-up control system and method |
-
2022
- 2022-07-04 CN CN202210781045.1A patent/CN114992009A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134444A (en) * | 2015-09-01 | 2015-12-09 | 东风朝阳朝柴动力有限公司 | Diesel engine automatic preheating device |
| CN112253342A (en) * | 2020-09-30 | 2021-01-22 | 中联重科股份有限公司 | Engine cold start warm-up control system and method |
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