CN-120654346-B - Method and system for designing quick cold start electric glow plug of diesel engine
Abstract
The invention discloses a method and a system for designing a quick cold start electric glow plug of a diesel engine, comprising the steps of selecting design parameters of the electric glow plug; and performing multi-objective optimization on the performance parameters of the electric glow plug by adopting a non-dominant sequencing genetic algorithm to obtain a design scheme with optimal total heating time consumption of the electric glow plug and space volume occupied by the electric glow plug when the ignition point of the electric glow plug is reached in a cylinder meeting constraint conditions. By adopting the technical scheme of the invention, the optimization of the quick cold start electric glow plug of the diesel engine is realized, the test times are greatly reduced, and the design efficiency and benefit of the electric glow plug are improved.
Inventors
- LI XIAOJIAN
- LI JINYANG
- LIU ZHENGXIAN
- REN GUIFENG
Assignees
- 天津大学
Dates
- Publication Date
- 20260508
- Application Date
- 20250529
Claims (4)
- 1. A method for designing a rapid cold start electric glow plug for a diesel engine, comprising: selecting design parameters of the electric glow plug; obtaining an electric glow plug performance parameter according to the electric glow plug design parameter; Performing multi-objective optimization on the performance parameters of the electric glow plug by adopting a non-dominant sequencing genetic algorithm to obtain a design scheme with optimal total heating time consumption of the electric glow plug and space volume occupied by the electric glow plug when the ignition point is reached in a cylinder meeting constraint conditions; The design parameters of the electric glow plug comprise the diameter of a resistance wire coil, the pitch of the resistance wire coil, the length of the electric glow plug, the diameter of the electric glow plug and the thermal power of the unit area of the electric glow plug; the electric glow plug performance parameters comprise total electric glow plug heating power, space volume occupied by the electric glow plug and total electric glow plug heating time when a firing point is reached in a cylinder, wherein the total electric glow plug heating time when the firing point is reached in the cylinder is estimated through a transient heat flow numerical simulation method, and according to a numerical simulation result, the mapping relation between the total electric glow plug heating time and the diameter of a resistance wire coil, the pitch of the resistance wire coil, the length of the electric glow plug, the diameter of the electric glow plug and the heating power of the unit area of the electric glow plug when the firing point is reached in the cylinder is constructed by adopting an optimal Latin hypercube sampling method and a generalized neural network, so that the total electric glow plug heating time when the firing point is reached in the cylinder is rapidly estimated according to the electric glow plug design parameters.
- 2. The method for designing a rapid cold start electric glow plug for a diesel engine according to claim 1, wherein the constraint condition is that the total power generated by the electric glow plug is smaller than a given value, and the objective function is to minimize the total time consumed by the electric glow plug to heat up when the ignition point is reached in the cylinder and to minimize the space volume occupied by the electric glow plug.
- 3. A diesel rapid cold start electric glow plug design system comprising: The first processing module is used for selecting design parameters of the electric glow plug; the second processing module is used for obtaining the performance parameters of the electric glow plug according to the design parameters of the electric glow plug; The third processing module is used for performing multi-objective optimization on the performance parameters of the electric glow plug by adopting a non-dominant sorting genetic algorithm, so as to obtain a design scheme with optimal total heating time consumption of the electric glow plug and space volume occupied by the electric glow plug when the ignition point of the electric glow plug is reached in a cylinder meeting constraint conditions; The first processing module is used for selecting electric glow plug design parameters, wherein the electric glow plug design parameters comprise resistance wire coil diameter, resistance wire coil pitch, electric glow plug length, electric glow plug diameter and electric glow plug unit area thermal power; the second processing module includes: the first processing unit is used for obtaining the performance parameters of the electric glow plug, and comprises the total heating power of the electric glow plug, the space volume occupied by the electric glow plug and the total heating time consumption of the electric glow plug when the ignition point is reached in the cylinder; And the second processing unit evaluates total heating time consumption of the electric glow plug when the ignition point is reached in the cylinder through a transient heat flow numerical simulation method, adopts an optimal Latin hypercube sampling method and a generalized neural network to construct a mapping relation between the total heating time consumption of the electric glow plug when the ignition point is reached in the cylinder and the diameter of the resistance wire coil, the pitch of the resistance wire coil, the length of the electric glow plug, the diameter of the electric glow plug and the thermal power of the unit area of the electric glow plug according to a numerical simulation result, and realizes quick evaluation of the total heating time consumption of the electric glow plug when the ignition point is reached in the cylinder according to design parameters of the electric glow plug.
- 4. The rapid cold start electric glow plug design system of claim 3 wherein the third processing module is configured to perform multi-objective optimization of the electric glow plug performance parameters using a non-dominant ordered genetic algorithm, the constraint being that the total electric glow plug heating power is less than a given value, and the objective function is to minimize the total electric glow plug heating time and minimize the volume of space occupied by the electric glow plug when the ignition point is reached in the cylinder.
Description
Method and system for designing quick cold start electric glow plug of diesel engine Technical Field The invention belongs to the technical field of diesel engine air intake heating, and particularly relates to a method and a system for designing a quick cold start electric glow plug of a diesel engine. Background The width of the Chinese operators is wide, the geographical latitude span of the north and south is large, extreme weather often occurs in winter in the northeast and northwest provinces of China, the average temperature in winter in a plurality of places is below-10 ℃, the average temperature of the coldest month in Xinjiang, inner Mongolia, tibet and northeast areas is between-41 and-25 ℃, and the lowest temperature of the Heilongjiang Mo River can even reach-53 ℃. In extremely cold environment, the air inlet temperature of the diesel engine is too low, so that the problems of difficult ignition, combustion retardation and the like are caused, and the maneuverability of the vehicle is severely restricted. As a widely applied diesel engine air inlet heating method, the electric heating technology heats the air inlet channel through a resistance wire or other electric heating elements, so that the air inlet of the diesel engine is quickly preheated, and the atomization and evaporation conditions of fuel are improved, thereby ensuring the quick ignition and stable combustion of the diesel engine. However, due to long-term dependence on the traditional electric glow plug optimal design method mainly based on manual trial and error, the electric heating device has the bottleneck problems of unmatched heating power, low heat exchange efficiency, compact structural design, high redundancy, lower reliability and the like. Therefore, by combining a transient heat flow numerical simulation method, a neural network model and an automatic optimization theory, a new diesel engine rapid cold start electric glow plug design method is developed, and is important for developing an electric heating device with high efficiency, high reliability and compact structure, further realizing rapid start of the diesel engine in an extremely cold environment and improving the maneuverability of a vehicle. Disclosure of Invention The invention aims to solve the technical problem of providing a method and a system for designing a quick cold start electric glow plug of a diesel engine. In order to achieve the above purpose, the present invention adopts the following technical scheme: a method for designing a rapid cold start electric glow plug for a diesel engine, comprising: selecting design parameters of the electric glow plug; obtaining an electric glow plug performance parameter according to the electric glow plug design parameter; and performing multi-objective optimization on the performance parameters of the electric glow plug by adopting a non-dominant sequencing genetic algorithm to obtain a design scheme with optimal total heating time consumption of the electric glow plug and space volume occupied by the electric glow plug when the ignition point of the cylinder meeting constraint conditions is reached. Preferably, the electric glow plug design parameters comprise the diameter of the resistance wire coil, the pitch of the resistance wire coil, the length of the electric glow plug, the diameter of the electric glow plug and the thermal power per unit area of the electric glow plug; Preferably, the performance parameters of the electric glow plug comprise the total heating power of the electric glow plug, the space volume occupied by the electric glow plug and the total heating time of the electric glow plug when the ignition point is reached in the cylinder. The method comprises the steps of estimating total heating time consumption of an electric glow plug when a fire point is reached in a cylinder through a transient heat flow numerical simulation method, constructing a mapping relation between the total heating time consumption of the electric glow plug when the fire point is reached in the cylinder, the diameter of a resistance wire loop, the pitch of the resistance wire loop, the length of the electric glow plug, the diameter of the electric glow plug and the unit area heating power of the electric glow plug by adopting an optimal Latin hypercube sampling method and a generalized neural network according to a numerical simulation result, and rapidly estimating the total heating time consumption of the electric glow plug when the fire point is reached in the cylinder according to design parameters of the electric glow plug. Preferably, the constraint condition is that the total heating power of the electric glow plug is smaller than a given value, and the objective function is to minimize the total heating time of the electric glow plug when the ignition point in the cylinder is reached and minimize the space volume occupied by the electric glow plug. The invention also provides a diesel engine rapid cold start