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Control devices for internal combustion engines

A control device and internal combustion engine technology, applied in engine control, internal combustion piston engine, electrical control, etc., can solve the problems of false detection of noise and vibration for ignition, etc.

Active Publication Date: 2016-03-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the case of the conventional fuel injection control device disclosed in Patent Document 1, there is a problem of noise vibration, which is vibration not caused by ignition, which is generated by the operation of the intake valve and exhaust valve mounted on the internal combustion engine. May be superimposed, in which case noise and vibration will be misdetected as ignition

Method used

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  • Control devices for internal combustion engines
  • Control devices for internal combustion engines
  • Control devices for internal combustion engines

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Embodiment approach 1

[0022] Next, a control device for an internal combustion engine according to Embodiment 1 of the present invention will be described in detail with reference to the drawings. figure 1 It is an overall configuration diagram of a control device for an internal combustion engine according to Embodiment 1 of the present invention, showing a case where the present invention is applied to an internal combustion engine (SI engine) that performs premixed combustion by spark ignition.

[0023] figure 1 Among them, the combustion chamber 1b of the cylinder 1a in the internal combustion engine (hereinafter referred to as the engine) 1 includes an intake valve 1c, an exhaust valve 1d, and a piston 1e. In addition, a spark plug 2 and an injection Device 3. In addition, the intake air amount of the engine 1 is adjusted by an electronically controlled throttle 5 provided on the intake passage 4 . The electronically controlled throttle 5 includes a throttle valve (throttle valve) 5a, a moto...

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Abstract

A vibration waveform of a knock-specific frequency component of an internal combustion engine is calculated over a plurality of ignition cycles of the internal combustion engine according to an output of a knock sensor and an output of a crank angle sensor. An actual ignition timing is calculated by detecting a position corresponding to a crank angle at which a standard deviation of the vibration waveform exceeds a predetermined first determination level as a vibration position by combustion of the internal combustion engine.

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine, and more particularly to a control device for an internal combustion engine provided with a function of detecting the ignition timing of fuel supplied to the internal combustion engine. Background technique [0002] Conventionally, a fuel injection control device has been proposed that uses an acceleration sensor (knock sensor) mounted on the engine block, for example, in an internal combustion engine called a diesel engine that performs diffusion combustion by fuel injection. , and the combustion timing, that is, the ignition timing of the fuel is detected based on the vibration generated during fuel combustion, and the fuel injection timing is controlled based on the detected ignition timing (for example, refer to Patent Document 1). [0003] In addition, as another conventional device, there is also disclosed a fuel injection control device that determines whether t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P5/152F02D45/00
CPCF02P5/045F02P5/152F02D37/02F02P5/1502F02P5/1525F02P5/1526G01L23/225Y02T10/40
Inventor 松嶋裕平
Owner MITSUBISHI ELECTRIC CORP