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Fuel injection control system for internal combustion engine and fuel injection control method for internal combustion engine

A fuel injection, internal combustion engine technology, applied in the directions of fuel injection control, engine control, electrical control, etc., can solve problems such as piston durability reduction, and achieve the effect of suppressing excessive temperature rise

Active Publication Date: 2021-12-24
ISUZU MOTORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, when the piston is exposed to high temperature due to excessive heating, the durability of the piston is greatly reduced

Method used

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  • Fuel injection control system for internal combustion engine and fuel injection control method for internal combustion engine
  • Fuel injection control system for internal combustion engine and fuel injection control method for internal combustion engine
  • Fuel injection control system for internal combustion engine and fuel injection control method for internal combustion engine

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Embodiment Construction

[0019] Next, a fuel injection control system for an internal combustion engine and a fuel injection control method for an internal combustion engine according to an embodiment of the present disclosure will be described with reference to the drawings.

[0020] A fuel injection control system for an internal combustion engine, which is the object of the present disclosure, is a system for setting and controlling the injection start timing and injection amount of fuel into cylinders of the engine (internal combustion engine) based on the operating state of the engine. In order to control this system, a control device is provided. The control device controls the start timing of fuel injection into cylinders of the engine.

[0021] In the fuel injection control system of the internal combustion engine of the present disclosure, the control device estimates the temperature of the piston in the cylinder (hereinafter referred to as "piston temperature") Te, and controls the fuel inje...

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Abstract

In the control device of the fuel injection control system of the internal combustion engine, when the piston temperature (Te) is greater than the threshold temperature (Tf) and less than the maximum limit temperature (Tmax), based on the piston temperature (Te), the maximum limit temperature (Tmax) and the threshold temperature (Tf) Calculate the weighting coefficient (k), and calculate the delayed injection start timing corresponding to the piston temperature (Te) based on the calculated weighting coefficient (k), the maximum delayed injection start timing (SOImax) and the standard injection start timing (SOIn) (SOIk), and set the calculated delayed injection start timing (SOIk) as the injection start timing control value (SOIc).

Description

technical field [0001] The present disclosure relates to a fuel injection control system of an internal combustion engine and a fuel injection control method of an internal combustion engine. Background technique [0002] In an internal combustion engine such as a diesel engine included in a vehicle, a piston is housed inside a cylinder. In addition, the internal combustion engine generates power for running the vehicle by burning fuel in a combustion chamber that is a space formed between the cylinder, the piston, and the cylinder head. [0003] Since the piston is repeatedly subjected to a mechanical load due to a pressure change in the cylinder and a thermal load due to the above-mentioned combustion reaction, the durability of the piston gradually decreases. In particular, when the piston is exposed to high temperature due to excessive temperature rise, the durability of the piston is greatly reduced. [0004] Here, a control system for a direct-injection spark ignitio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/22
CPCF02D41/22
Inventor 花村良文三田拓朗青木信夫安立利明穴灶保上原聪塚本典之坪田赖昌
Owner ISUZU MOTORS LTD