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A fast idle warm-up control method for an electronically controlled diesel engine

A diesel engine and control method technology, applied in engine control, electrical control, engine components, etc., can solve the problems of high gas emissions and solid particulate matter emissions, high engine fuel consumption, and fuel injector carbon deposition, etc., to reduce smoke emissions. speed, improve combustion efficiency, and protect the effect of the engine

Active Publication Date: 2022-05-24
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of low combustion efficiency, high engine fuel consumption, relatively high gas emissions and solid particle emissions, and easy product carbon deposition in fuel injectors when the ambient temperature and engine temperature are too low, the invention provides an electronically controlled diesel engine fast Idle warm-up control method

Method used

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  • A fast idle warm-up control method for an electronically controlled diesel engine
  • A fast idle warm-up control method for an electronically controlled diesel engine
  • A fast idle warm-up control method for an electronically controlled diesel engine

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Embodiment Construction

[0037] Combining with the practical application of the fast idle warm-up control method in an electronic controller to control a high-pressure common rail diesel engine project, the implementation and use effects of this circuit will be explained in detail.

[0038] For a certain type of electronically controlled diesel engine, the number of cylinders is 6, the displacement is 6.7, the rated power is 300 horsepower, and the working sequence of the engine cylinders is 1-5-3-6-2-4. The idle speed is 750r / min, and the above method is used to control the fast idle speed condition according to the engine starting state. The working steps are as follows:

[0039] Step 1: Set the fast idle warm-up target speed Desired_Speed ​​to 1200r / min, C_Twait to 5s), and the low idle cycle speed adjustment C_Nrate to 25r / s~50r / s; the intake air temperature threshold is set to T_charge_trh is 0℃, The coolant temperature threshold value T_coolant_trh is 0℃, the vehicle static speed C_V_trh, C_V_t...

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Abstract

The invention relates to a fast idle warm-up control method for an electronically controlled diesel engine, which effectively improves the fuel economy when the ambient temperature and the engine temperature are too low, reduces carbon deposits and exhaust smoke, and has certain effects on protecting the engine. The main steps of the method include: 1. Collecting the lowest intake air temperature and the lowest coolant temperature; 2. Judging the temperature condition; 3. Judging the engine working condition; 4. Judging whether the pedal signal is established; 5. Judging the vehicle speed signal; 6. Judging the status of the engine brake switch; 7. Running in fast idling conditions.

Description

technical field [0001] The invention belongs to the field of power control of an electronically controlled diesel engine, in particular to an electronically controlled diesel engine fast idling warm-up control method. Background technique [0002] In a cold environment, when the diesel engine injects fuel, the diesel is injected into the cylinder, so that the mist diesel and the compressed air in the cylinder are fully mixed to form a high-temperature, high-pressure combustible gas, which burns by itself. However, when the ambient temperature and engine temperature are too low, the combustion efficiency is low, the fuel consumption of the engine is high, the gas emissions and solid particulate matter emissions are relatively high, and the fuel injector is prone to product carbon deposition. SUMMARY OF THE INVENTION [0003] In order to solve the problems of low combustion efficiency, high engine fuel consumption, relatively high gas emissions and solid particulate matter e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D17/02F02D41/16F02N19/00
CPCF02D31/001F02D17/02F02D41/16F02N19/00F02D2200/0414F01P11/16F02D2200/602F02D2200/501
Inventor 于正同毛宁邓广宗时培燕孙旭升林凯
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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