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Control device for internal combustion engine

一种控制装置、内燃机的技术，应用在发动机控制、燃料喷射装置、燃料喷射控制等方向，能够解决燃料喷射量不可控等问题

Active Publication Date: 2017-08-04
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case where such fuel pressure pulsation occurs, if the fuel injection amount of the port injection valve is controlled based on the detection value of the fuel pressure sensor, the fuel injection amount may be appropriately uncontrollable

Method used

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  • Control device for internal combustion engine
  • Control device for internal combustion engine
  • Control device for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] figure 1 It is a schematic block diagram of the control device 1 of this embodiment. The control device 1 includes an engine 10 and an electronic control unit (ECU) 41 that controls the engine 10 . The engine 10 is a spark ignition type inline four-cylinder engine equipped with: a cylinder group 11 including cylinders 111 to 114 arranged in series; an in-cylinder injection valve group 37 ; and a port injection valve group 27 . Engine 10 is an example of an internal combustion engine. The control device 1 is an example of a control device for an internal combustion engine.

[0026] In-cylinder injection valve group 37 includes in-cylinder injection valves 371 to 374 that inject fuel into cylinders 111 to 114, respectively. The port injection valve group 27 includes port injection valves 271 to 274 that inject fuel to the intake ports 13 that communicate with t...

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PUM

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Abstract

A control device for an internal combustion engine is equipped with an electronic control unit. The electronic control unit is configured to: i) calculate amplitudes of respective waves, respectively, originating from a plurality of factors that causes fuel pressure pulsation within a low-pressure fuel passage, vibration frequencies of the respective waves within a crank angle range of 360 degrees, initial phases of the respective waves, and central fuel pressure values of the respective waves; and ii) predict a fuel pressure value at an arbitrary crank angle according to a model formula showing a synthesized wave obtained by synthesizing the respective waves, on a basis of the amplitudes, the vibration frequencies, the initial phases, and the central fuel pressure values of the respective waves calculated.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] Internal combustion engines having in-cylinder injection valves and in-cylinder port injection valves are known. In such an internal combustion engine, fuel drawn by a low-pressure pump is supplied to the port injection valve via a low-pressure fuel passage, and fuel further pressurized by the high-pressure pump is supplied to the in-cylinder injection valve via the high-pressure fuel passage. In this configuration, a fuel pressure sensor that detects the fuel pressure in the low-pressure fuel passage may be provided. The detection value of such a fuel pressure sensor can be used for the control of various control objects, for example, for the control of the fuel injection amount from the port injection valve. [0003] In this configuration, fuel pressure may pulse within the low pressure fuel passage. Since fuel pressure pulsations occur based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/34F02D41/20F02D41/30
CPCF02D41/009F02D41/20F02D41/3094F02D41/34F02D2200/0602F02D2200/101F02D2250/04F02D2041/3881F02D2200/0604F02M63/029Y02T10/40F02D2041/1412F02D2041/389
Inventor 橘伦太郎须田享井户侧正直
Owner TOYOTA JIDOSHA KK