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Method and device for controlling air intake amount for suppressing knocking under early combustion and high intensity knocking conditions

A high-intake air volume and high-strength technology, applied in electrical control, fuel injection control, engine control, etc., can solve problems such as cylinder wall wear, destruction of cylinder wall oil film, damage to pistons and valve parts, and achieve the effect of suppressing knocking

Active Publication Date: 2020-11-27
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Severe knocking will destroy the oil film on the cylinder wall, aggravate the wear of the cylinder wall, or directly cause damage to pistons, valves and other parts

Method used

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  • Method and device for controlling air intake amount for suppressing knocking under early combustion and high intensity knocking conditions
  • Method and device for controlling air intake amount for suppressing knocking under early combustion and high intensity knocking conditions
  • Method and device for controlling air intake amount for suppressing knocking under early combustion and high intensity knocking conditions

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Effect test

Embodiment 1

[0036] In the embodiment of the present invention, in order to prevent knocking, the intake air volume of the engine is limited to different degrees under different working conditions. Maximize engine power and fuel economy.

[0037] Such as figure 1 Shown is a schematic flow chart of an intake air volume control method for suppressing knocking under pre-ignition and high-intensity knocking provided by an embodiment of the present invention. figure 1 The method shown includes the following steps:

[0038] S101: Determine the first target air volume limit according to the number of engine pre-ignition occurrences. When engine pre-ignition occurs, gradually reduce the engine air intake to suppress knocking, and gradually restore the engine's maximum air intake when pre-ignition no longer occurs is the first target gas volume limit;

[0039] In the embodiment of the present invention, in step S101, determining the first target gas volume limit value according to the number of ...

Embodiment 2

[0074] Such as Figure 4 Shown is a schematic structural diagram of a device provided by an embodiment of the present invention, including:

[0075] The first detonation suppression unit 201 is used to determine the first target gas volume limit according to the number of engine pre-ignition occurrences. When engine pre-ignition occurs, knocking is suppressed by gradually reducing the intake air volume of the engine. When pre-ignition no longer occurs Gradually restore the maximum intake air volume of the engine to the first target air volume limit;

[0076] The second knock suppression unit 202 is used to determine the second target gas volume limit according to the engine knock intensity. When high-intensity knock occurs, the knock is suppressed by gradually reducing the intake air volume of the engine. When high-intensity knock does not occur After stabilizing for the first preset time, the maximum intake air volume of the engine is gradually restored to the second target ...

Embodiment 3

[0079] The present application also provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Storage, Magnetic Disk, Optical Disk, Server, App Store, etc., on which computer programs, program When executed by the processor, the intake air quantity control method for suppressing knocking under pre-ignition and high-intensity knocking in the method embodiment is realized.

[0080] When engine pre-ignition occurs, the knocking is suppressed by gradually reducing the intake air volume of the engine, and the maximum intake air volume of the engine is gradually restored when the pre-ignition no longer occurs, and the engine power is gradually restored; finally, when high-intensity knocking occurs, b...

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PUM

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Abstract

The invention discloses a method and device for controlling gas intake amount for suppressing knocking under early combustion and high intensity knocking conditions, and belongs to the field of engineknocking and air amount control. The method comprises the following steps that a first target air amount limit value is determined according to the number of times of engine early combustion; when anengine undergoes early combustion, knocking is suppressed by gradually reducing the engine gas intake amount, and the maximum gas intake amount of the engine is gradually restored to be a first target gas amount limit value when the early combustion does not occur any longer; a second target gas amount limit value is determined according to the engine knocking intensity, knocking is suppressed bygradually reducing the engine gas intake amount when high-intensity knocking occurs, and after high-intensity knocking does not occur, the first preset time is stabilized first and then the maximum gas intake amount of the engine is gradually restored to be a second target gas amount limit value. By means of the method and the device, knocking can be effectively suppressed.

Description

technical field [0001] The invention belongs to the field of engine knocking and air volume control, and more specifically relates to a method and device for controlling engine air intake volume to suppress knocking under pre-ignition and high-intensity knocking conditions. Background technique [0002] Gasoline engine knock is an abnormal combustion in the cylinder. Severe knocking will destroy the oil film on the cylinder wall, aggravate the wear of the cylinder wall, or directly cause damage to parts such as pistons and valves. [0003] Modern engine control systems are designed with knock control logic. By reading the signal of the knock sensor installed on the engine block, it is judged whether knocking occurs. shock. [0004] Knocking is easy to occur when the temperature of the engine is high or the engine load is high. In order to suppress the occurrence of knocking, it is necessary to limit the maximum air intake of the engine. Contents of the invention [0005...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/26F02P5/152
CPCF02D41/0002F02D41/26F02P5/152
Inventor 秦龙刘磊彭红涛
Owner DONGFENG MOTOR CORP HUBEI