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Apparatus for controlling internal combustion engine provided with turbocharger

A technology of control device and supercharger, applied in engine control, internal combustion piston engine, electrical control, etc., can solve the problems of difficulty in suppressing abnormal noise, low degree of freedom in hardware design, low degree of freedom, etc.

Inactive Publication Date: 2013-07-24
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, if the frequency of such pressure pulsation is amplified by the spatial resonance of the space in the turbine housing and the space in the exhaust pipe (exhaust gas passage from the turbine housing to the catalyst), it will become Discharge sound, the abnormal noise becomes a problem
[0010] Here, in order to avoid the above-mentioned pressure pulsation problem, even if it is intended to control the frequency of the space resonance of the turbine housing and the catalyst system, which is the main cause of the amplification, due to constraints such as supercharging efficiency, emissions, and installation requirements, the hardware design The degree of freedom is low, so it is difficult to suppress the generation of abnormal noise
Furthermore, even if the frequency of the spatial resonance is changed, since the pressure pulsation has a frequency component proportional to the flow velocity of the exhaust gas as described above, amplification (resonance) of the pulsation in the changed frequency band of the spatial resonance cannot be avoided.
[0011] In addition, it is also considered to add a sound-absorbing structure to the exhaust pipe of the vehicle, but due to the constraints of installation requirements, appearance, and cost, the degree of freedom in countermeasures for a single abnormal noise phenomenon is low
In addition, even if the vehicle countermeasures are taken against the sound emitted from the exhaust pipe of the vehicle, the problem of sound outside the vehicle remains (especially the problem of abnormal noise during idling (high-speed idling) while parked)
[0012] For the above reasons, in order to suppress the abnormal noise caused by the pressure pulsation generated at the rear end of the nozzle diaphragm, it is necessary to take countermeasures on the engine (turbocharger) side located upstream of the variable nozzle diaphragm mechanism, but the current situation is that the technology has not yet been established

Method used

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  • Apparatus for controlling internal combustion engine provided with turbocharger
  • Apparatus for controlling internal combustion engine provided with turbocharger
  • Apparatus for controlling internal combustion engine provided with turbocharger

Examples

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Embodiment approach

[0165] In the above examples, the case where the present invention is applied to a common rail direct injection multi-cylinder (four-cylinder) diesel engine has been described. However, the present invention is not limited thereto, and can be applied to other diesel engines having any number of cylinders, such as six-cylinder diesel engines, for example.

[0166] In addition, in the above examples, an example of control of a diesel engine was described, but the present invention is not limited thereto, and the present invention can also be applied to the control of a gasoline engine equipped with a variable nozzle vane turbocharger. .

[0167] In the above examples, the case where the present invention is applied to an internal combustion engine (diesel engine, gasoline engine, etc.) equipped with an EGR device (exhaust gas recirculation device) has been described, but the present invention is not limited thereto. The present invention can also be applied to the control of an...

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PUM

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Abstract

The present invention enables an exhaust gas to quickly pass through a spatial resonance region in an exhaust gas passage space ranging from a turbine housing to a catalyst, by increasing the flow velocity (VN passing flow velocity) of the exhaust gas passing through a nozzle vane when the exhaust gas reaches the spatial resonance region at the time of acceleration in an internal combustion engine provided with a variable nozzle vane turbocharger. When the exhaust gas reaches the spatial resonance region at the time of deceleration, the VN passing flow velocity is decreased to enable the exhaust gas to quickly pass through the spatial resonance region. By this control, it is possible to reduce the time during which the frequency of pressure pulsation generated at the rear end of the nozzle vane is amplified in the spatial resonance region. It is also possible to suppress the generation of abnormal noise caused by the pressure pulsation.

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine with a supercharger, and more specifically, to a control device for an internal combustion engine including a variable nozzle diaphragm type supercharger. Background technique [0002] An internal combustion engine (hereinafter also referred to as an engine) mounted on a vehicle is equipped with a supercharger (hereinafter also referred to as a turbocharger) that utilizes exhaust energy. A turbocharger generally has a turbine that is rotated by exhaust gas flowing through the exhaust passage of the engine, and a compressor wheel that forcibly sends air in the intake passage to the combustion chamber of the engine. a chamber; and a connecting shaft connecting the aforementioned turbine and compressor wheels. In the turbocharger with such a structure, the energy of the exhaust gas is used to rotate the turbine arranged in the exhaust passage, and the impeller of the comp...

Claims

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Application Information

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IPC IPC(8): F02B37/00F02B37/24
CPCF01N3/101F01N3/0842F02D41/0007F01N13/02F02M25/0707Y02T10/144F02D41/1445F02B37/24Y02T10/22F01N13/009F01N2260/16F02M26/05Y02T10/12
Inventor 井藤进矢
Owner TOYOTA JIDOSHA KK
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