CN109356761B - Preheating control method and module for diesel engine - Google Patents
Preheating control method and module for diesel engine Download PDFInfo
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- CN109356761B CN109356761B CN201811554602.6A CN201811554602A CN109356761B CN 109356761 B CN109356761 B CN 109356761B CN 201811554602 A CN201811554602 A CN 201811554602A CN 109356761 B CN109356761 B CN 109356761B
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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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- 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
- 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
- F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
- F02M31/042—Combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
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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
- F02N19/10—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines by heating of engine coolants
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a preheating control method and a module of a diesel engine, wherein the method comprises the following steps: s01: judging whether the water temperature sensor has faults or not, if not, executing S011-S012, and if so, executing S02; s011: collecting the temperature and atmospheric pressure of the cooling liquid; s012: acquiring first preheating time according to the temperature of the cooling liquid and the atmospheric pressure; s02: judging whether the ambient temperature sensor has faults or not, if not, executing S021-S022, and if so, executing S03; s021: collecting the ambient temperature; s022: setting the temperature of the cooling liquid to be the ambient temperature in S021, and executing S011-S012; s03: judging whether the intake air temperature sensor has a fault after supercharging and inter-cooling, if not, executing S031-S032, and if so, executing S04; s031: collecting the inlet air temperature and the atmospheric pressure; s032: acquiring second preheating time according to the air inlet temperature and the atmospheric pressure; s04: the coolant temperature is set to a preset value, and S011-S012 are performed. The preheating control method of the diesel engine can effectively avoid damage of the preheating device due to too long heating time.
Description
Technical Field
The invention relates to the field of diesel engines, in particular to a preheating control method and a preheating control module for a diesel engine.
Background
The preheating device is used as a key part for assisting the starting of the diesel engine and can assist the cold starting of the diesel engine. When the diesel engine is cold started at low temperature, the preheating device preheats air in the cylinder, so that the diesel engine is assisted to be started. Furthermore, the preheating device can be continuously used for heating air in a period of time after the cold start at a low temperature, thereby improving the idle speed stability and noise of the diesel engine.
The operating time of the existing pre-heating device is determined by the engine coolant temperature and the atmospheric pressure. When the water temperature sensor malfunctions, the engine coolant temperature that determines the operating time of the preheating device is set to a preset value. At this time, no matter what state the diesel engine is in, the preheating device needs to work for a long time, and the preheating device is easy to damage. Especially in tropical regions, where the diesel engine is in a hot state, the preheating device is more likely to be damaged.
Therefore, how to provide a preheating control method capable of effectively avoiding the damage of the preheating device becomes a technical problem to be solved urgently in the field.
Disclosure of Invention
An object of the present invention is to provide a new technical solution for a warm-up control method of a diesel engine that can effectively avoid damage to a warm-up device.
According to a first aspect of the invention, a diesel engine warm-up control method is provided.
The preheating control method of the diesel engine comprises the following steps:
s01: after the vehicle is powered on, judging whether the water temperature sensor has a fault, if not, executing the steps S011-S012, and if so, executing the step S02;
s011: collecting the temperature and atmospheric pressure of the cooling liquid;
s012: acquiring first preheating time according to the temperature and the atmospheric pressure of the cooling liquid in the step S011;
s02: judging whether the ambient temperature sensor has faults or not, if not, executing steps S021-S022, and if so, executing step S03;
s021: collecting the ambient temperature;
s022: setting the temperature of the cooling liquid to the environmental temperature in the step S021, and executing the steps S011-S012;
s03: judging whether the intake air temperature sensor has a fault after supercharging and inter-cooling, if not, executing steps S031-S032, and if so, executing step S04;
s031: collecting the inlet air temperature and the atmospheric pressure;
s032: acquiring second preheating time according to the inlet air temperature and the atmospheric pressure in the step S031;
s04: the temperature of the coolant is set to a preset value, and steps S011-S012 are performed.
Optionally, the first warm-up time in step S012 is obtained by looking up a first warm-up time table, which is a relationship table of engine coolant temperature, atmospheric pressure, and warm-up time.
Optionally, the second preheating time in step S032 is obtained by looking up a second preheating time table, where the second preheating time table is a relation table of intake air temperature, atmospheric pressure, and preheating time.
Optionally, step S012 further includes: and sending a preheating warning signal.
Optionally, step S032 further includes: and sending a preheating warning signal.
Optionally, the preset value in step S04 is-25 ℃.
According to a second aspect of the invention, a diesel engine preheating control module is provided.
The diesel engine preheating control module is used for judging whether a water temperature sensor has a fault or not after a vehicle is powered on, acquiring the temperature and the atmospheric pressure of cooling liquid if the water temperature sensor has no fault, and acquiring first preheating time according to the temperature and the atmospheric pressure of the cooling liquid; if the water temperature sensor has a fault, judging whether the environment temperature sensor has a fault; if the ambient temperature sensor has no fault, acquiring ambient temperature and atmospheric pressure, and acquiring preheating time according to the ambient temperature and the atmospheric pressure; if the ambient temperature sensor has a fault, judging whether the supercharged and intercooled intake temperature sensor has a fault; if the intake air temperature sensor has no fault after supercharging and intercooling, acquiring intake air temperature and atmospheric pressure, and acquiring second preheating time according to the intake air temperature and the atmospheric pressure; and if the intake air temperature sensor has faults after the charge and inter-cooling, setting the temperature of the cooling liquid as a preset value, and acquiring the preheating time according to the temperature of the cooling liquid and the atmospheric pressure.
Optionally, the first preheating time is obtained by looking up a first preheating time table, wherein the first preheating time table is a relation table of engine coolant temperature, atmospheric pressure and preheating time;
and the second preheating time is obtained by checking a second preheating time table, wherein the second preheating time table is a relation table of air inlet temperature, atmospheric pressure and preheating time.
Optionally, after the first preheating time or the second preheating time is obtained, the preheating control module of the diesel engine sends a preheating warning signal.
Optionally, the preset value is-25 ℃.
According to the preheating control method of the diesel engine, the preset value is prevented from being directly used as the temperature of the engine cooling liquid after the water temperature sensor breaks down, and the preheating device can be effectively prevented from being damaged due to too long heating time.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart of an embodiment of a diesel engine warm-up control method of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1, the diesel engine warm-up control method of the present disclosure includes the steps of:
step S01: and after the vehicle is powered on, judging whether the water temperature sensor has a fault or not. If not, steps S011-S012 are executed. If so, step S02 is executed. The manner of determining whether the water temperature sensor is malfunctioning may be implemented by means well known in the art, and the present disclosure is not limited thereto.
Step S011: the coolant temperature and the atmospheric pressure were collected.
Step S012: the first warm-up time is acquired based on the coolant temperature and the atmospheric pressure in step S011. The preheating device may perform a preheating operation according to a first preheating time. The first warm-up time in step S012 is obtained by looking up a first warm-up time table, which is a relationship table of the engine coolant temperature, the atmospheric pressure, and the warm-up time. By changing the atmospheric pressure, different engine coolant temperatures and warm-up times can be obtained, thereby obtaining a relationship table of the engine coolant temperature, the atmospheric pressure, and the warm-up time.
In a specific implementation, step S012 further includes: and sending a preheating warning signal. The warm-up warning signal may be, for example, a signal that causes a warning lamp to light up or a speaker to sound, or the like.
Step S02: and judging whether the ambient temperature sensor has a fault or not. If not, executing steps S021-S022. If so, step S03 is executed. The manner of determining whether the ambient temperature sensor is malfunctioning may be implemented by means well known in the art, and the present disclosure is not limited thereto.
Step S021: the ambient temperature is collected.
Step S022: the coolant temperature is set to the ambient temperature in step S021, and steps S011-S012 are performed. In this way, the temperature of the cooling liquid in the steps S011-012 is the ambient temperature, and after the atmospheric pressure is collected, the first preheating time is obtained according to the temperature of the cooling liquid and the atmospheric pressure, and the preheating device can perform the preheating operation according to the first preheating time.
Step S03: and judging whether the intake air temperature sensor has a fault after supercharging and intercooling. If not, go to steps S031-S032. If so, step S04 is executed. The manner of determining if the charge-to-intercooler rear air temperature sensor is malfunctioning may be accomplished by means well known in the art and is not further limited by the present disclosure.
Step S031: intake air temperature and atmospheric pressure are collected.
Step S032: and acquiring a second preheating time according to the intake air temperature and the atmospheric pressure in the step S031. The intake air temperature is obtained by a supercharged and intercooled intake air temperature sensor. The preheating device may perform the preheating operation according to the second preheating time. And the second preheating time in the step S032 is obtained by checking a second preheating time table, wherein the second preheating time table is a relation table of air inlet temperature, atmospheric pressure and preheating time. By changing the atmospheric pressure, different intake air temperatures and preheating times can be obtained, thereby obtaining a relational table of intake air temperature, atmospheric pressure and preheating time.
In a specific implementation, step S032 further includes: and sending a preheating warning signal. The warm-up warning signal may be, for example, a signal that causes a warning lamp to light up or a speaker to sound, or the like.
Step S04: the temperature of the coolant is set to a preset value, and steps S011-S012 are performed. The preset value in step S04 may be-25 ℃. In this way, the temperature of the cooling liquid in the steps S011-012 is a preset value, after the atmospheric pressure is collected, the first preheating time is obtained according to the preset value and the atmospheric pressure, and the preheating device can perform the preheating operation according to the first preheating time.
According to the preheating control method of the diesel engine, the preset value is prevented from being directly used as the temperature of the engine cooling liquid after the water temperature sensor breaks down, and the preheating device can be effectively prevented from being damaged due to too long heating time.
The present disclosure also provides for a diesel engine preheating control module.
The diesel engine preheating control module is used for judging whether a water temperature sensor has a fault or not after a vehicle is powered on, acquiring the temperature and the atmospheric pressure of cooling liquid if the water temperature sensor has no fault, and acquiring first preheating time according to the temperature and the atmospheric pressure of the cooling liquid; if the water temperature sensor has a fault, judging whether the environment temperature sensor has a fault; if the ambient temperature sensor has no fault, acquiring ambient temperature and atmospheric pressure, and acquiring preheating time according to the ambient temperature and the atmospheric pressure; if the ambient temperature sensor has a fault, judging whether the supercharged and intercooled intake temperature sensor has a fault; if the intake air temperature sensor has no fault after supercharging and intercooling, acquiring intake air temperature and atmospheric pressure, and acquiring second preheating time according to the intake air temperature and the atmospheric pressure; and if the intake air temperature sensor has faults after the charge and inter-cooling, setting the temperature of the cooling liquid as a preset value, and acquiring the preheating time according to the temperature of the cooling liquid and the atmospheric pressure.
In one embodiment of the diesel engine warm-up control module of the present disclosure, the first warm-up time is looked up by a first warm-up time table, wherein the first warm-up time table is a relationship table of engine coolant temperature, atmospheric pressure, and warm-up time;
and the second preheating time is obtained by checking a second preheating time table, wherein the second preheating time table is a relation table of air inlet temperature, atmospheric pressure and preheating time.
In one embodiment of the diesel engine warm-up control module of the present disclosure, the diesel engine warm-up control module issues a warm-up warning signal after acquiring the first warm-up time or after acquiring the second warm-up time.
In one embodiment of the diesel engine preheating control module of the present disclosure, the preset value is-25 ℃.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A warm-up control method of a diesel engine, characterized by comprising the steps of:
s01: after the vehicle is powered on, judging whether the coolant temperature sensor has a fault, if not, executing steps S011-S012, and if so, executing step S02;
s011: collecting the temperature and atmospheric pressure of the cooling liquid;
s012: acquiring first preheating time according to the temperature and the atmospheric pressure of the cooling liquid in the step S011;
s02: judging whether the ambient temperature sensor has faults or not, if not, executing steps S021-S022, and if so, executing step S03;
s021: collecting the ambient temperature;
s022: setting the temperature of the cooling liquid to the environmental temperature in the step S021, and executing the steps S011-S012;
s03: judging whether the intake air temperature sensor has a fault after supercharging and inter-cooling, if not, executing steps S031-S032, and if so, executing step S04;
s031: collecting the inlet air temperature and the atmospheric pressure;
s032: acquiring second preheating time according to the inlet air temperature and the atmospheric pressure in the step S031;
s04: the temperature of the coolant is set to a preset value, and steps S011-S012 are performed.
2. The diesel engine warm-up control method according to claim 1, wherein the first warm-up time in step S012 is checked by a first warm-up time table that is a table of relationships of engine coolant temperature, atmospheric pressure, and warm-up time.
3. The warm-up control method of the diesel engine according to claim 1, wherein the second warm-up time in step S032 is obtained by looking up a second warm-up time table, which is a relationship table of intake air temperature, atmospheric pressure, and warm-up time.
4. The diesel engine warm-up control method according to claim 1, wherein step S012 further includes: and sending a preheating warning signal.
5. The diesel engine warm-up control method according to claim 1, wherein step S032 further includes: and sending a preheating warning signal.
6. The warm-up control method of the diesel engine according to any one of claims 1 to 5, wherein the preset value in step S04 is-25 ℃.
7. The diesel engine preheating control module is used for judging whether a coolant temperature sensor has a fault or not after a vehicle is powered on, acquiring coolant temperature and atmospheric pressure if the coolant temperature sensor has no fault, and acquiring first preheating time according to the coolant temperature and the atmospheric pressure; if the cooling liquid temperature sensor has a fault, judging whether the environment temperature sensor has a fault; if the ambient temperature sensor has no fault, acquiring ambient temperature and atmospheric pressure, and acquiring preheating time according to the ambient temperature and the atmospheric pressure; if the ambient temperature sensor has a fault, judging whether the supercharged and intercooled intake temperature sensor has a fault; if the intake air temperature sensor has no fault after supercharging and intercooling, acquiring intake air temperature and atmospheric pressure, and acquiring second preheating time according to the intake air temperature and the atmospheric pressure; and if the intake air temperature sensor has faults after the charge and inter-cooling, setting the temperature of the cooling liquid as a preset value, and acquiring the preheating time according to the temperature of the cooling liquid and the atmospheric pressure.
8. The diesel engine warm-up control module of claim 7, wherein the first warm-up time is determined by a first warm-up schedule, wherein the first warm-up schedule is a relationship table of engine coolant temperature, atmospheric pressure, and warm-up time;
and the second preheating time is obtained by checking a second preheating time table, wherein the second preheating time table is a relation table of air inlet temperature, atmospheric pressure and preheating time.
9. The diesel engine warm-up control module of claim 7, wherein the diesel engine warm-up control module issues a warm-up warning signal after acquiring the first warm-up time or after acquiring the second warm-up time.
10. The diesel engine preheating control module of claim 7, wherein the preset value is-25 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811554602.6A CN109356761B (en) | 2018-12-18 | 2018-12-18 | Preheating control method and module for diesel engine |
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| CN201811554602.6A CN109356761B (en) | 2018-12-18 | 2018-12-18 | Preheating control method and module for diesel engine |
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| CN110107415B (en) * | 2019-07-04 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of engine cold starting method, electronic control unit and system |
| CN111140338B (en) * | 2019-12-02 | 2021-01-15 | 潍柴动力股份有限公司 | Engine protection method and system based on air inlet temperature |
| CN111520271B (en) * | 2020-04-22 | 2022-05-10 | 东风越野车有限公司 | Auxiliary starting control method for engine of off-road vehicle in highland and severe cold environment |
| CN111691990A (en) * | 2020-06-12 | 2020-09-22 | 东风商用车有限公司 | Rapid engine warming method |
| CN114320702B (en) * | 2021-12-17 | 2023-05-16 | 中国北方发动机研究所(天津) | Air inlet heating control method for diesel engine |
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| WO2008034958A1 (en) * | 2006-09-22 | 2008-03-27 | Valeo Equipements Electriques Moteur | Device for starting an internal combustion engine, particularly a diesel engine |
| CN201080882Y (en) * | 2007-09-26 | 2008-07-02 | 安徽江淮汽车股份有限公司 | Supercharging intercooling diesel motor preheating device |
| CN103758673B (en) * | 2014-01-20 | 2016-05-11 | 潍柴动力股份有限公司 | Cold start control system and the method for diesel engine |
| KR101926927B1 (en) * | 2016-11-14 | 2018-12-07 | 현대자동차주식회사 | Engine start control method for flexible fuel vehicle |
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