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Internal combustion engine misfire detection device

A detection device, the technology of internal combustion engine, applied in the direction of internal combustion piston engine, combustion engine, mechanical equipment, etc., can solve the problems of deterioration of driving performance, deterioration of exhaust performance, etc., and achieve the effect of reducing the risk of false detection

Active Publication Date: 2022-06-21
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this engine misfire occurs, it may lead to deterioration of driving performance or deterioration of exhaust performance, etc.

Method used

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  • Internal combustion engine misfire detection device
  • Internal combustion engine misfire detection device
  • Internal combustion engine misfire detection device

Examples

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Embodiment Construction

[0026] Hereinafter, an internal combustion engine misfire detection device according to an embodiment of the present invention will be described with reference to the accompanying drawings as appropriate.

[0027] First, refer to figure 1 , the structure of the internal combustion engine misfire detection device in the present embodiment will be described in detail.

[0028] figure 1 It is a block diagram which shows the structure of the internal combustion engine misfire detection apparatus in this embodiment.

[0029] like figure 1 As shown, the internal combustion engine misfire detection device 1 in the present embodiment is constituted by an electronic control device such as an ECU (Electronic Control Unit), and is typically mounted on an engine having a 4-stroke / cycle internal combustion engine, a drive wheel, a main clutch, and a A saddle-ridden vehicle such as an automatic motorcycle with a transmission has a plurality of cylinders (not shown in the figure) in the 4...

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Abstract

An internal combustion engine misfire detection device (1) for detecting misfire of a 4-stroke / cycle internal combustion engine has: a crank angular velocity calculation unit (2) that calculates a crank angular velocity corresponding to the rotational speed of the engine for each predetermined crank angle; a determination parameter calculation unit ( 4) which calculates a reference value of the crank angular velocity, calculates a relative crank angular velocity which is a deviation between the reference value and the crank angular velocity, and calculates an integrated value of the relative crank angular velocity; and a misfire determination part (5) which performs a misfire determination based on the accumulated value The determination parameter calculation unit (4) sets an integration interval of the integration value according to the rotational speed of the internal combustion engine.

Description

technical field [0001] The present invention relates to an internal combustion engine misfire detection device, and more particularly, to an internal combustion engine misfire detection device that detects misfire of a 2-cylinder and 3-cylinder 4-stroke / cycle internal combustion engine. Background technique [0002] In an internal combustion engine, such as a 2-cylinder or 3-cylinder 4-cycle / cycle engine, 4 strokes of intake stroke, compression stroke, expansion stroke, and exhaust stroke are used as 1 cycle, and the 4 strokes are repeatedly executed, thereby to generate output. The engine control device controls the timing of fuel injection, ignition, and the like by discriminating each stroke of the engine. At this time, depending on the operating state of the engine or the like, there is a case where the engine misfires in which no fire occurs in the engine, or even if a fire occurs, the engine does not normally propagate. When this engine misfire occurs, deterioration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D45/00
CPCF02D2200/1015F02D2200/1012F02D2041/1432F02D41/22F02D37/02F02D35/028F02D41/0097
Inventor 田﨑胜德森田优树
Owner HITACHI ASTEMO LTD
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