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Internal combustion engine control method and internal combustion engine control device

A control method, internal combustion engine technology, applied in the direction of engine control, internal combustion piston engine, electrical control, etc., can solve problems such as insufficient research, and achieve the effect of efficient recovery

Active Publication Date: 2019-12-13
NISSAN MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the effective control of the wastegate valve and the variable nozzle of the turbocharger at the time of transition such as changing the intake air amount of the internal combustion engine has not been sufficiently studied, and there is room for further improvement.

Method used

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  • Internal combustion engine control method and internal combustion engine control device
  • Internal combustion engine control method and internal combustion engine control device
  • Internal combustion engine control method and internal combustion engine control device

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Embodiment Construction

[0017] Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

[0018] figure 1 It is an explanatory diagram schematically showing a schematic configuration of a control device for the internal combustion engine 1 according to the present invention. figure 1 The control method of the internal combustion engine 1 according to the present invention can be applied to this.

[0019] The internal combustion engine 1 is, for example, of a direct injection type, and has a fuel injection valve (not shown) for injecting fuel into the cylinder for each cylinder.

[0020] The internal combustion engine 1 is mounted on a vehicle such as an automobile as a drive source, and has an intake passage 2 and an exhaust passage 3 .

[0021] The air intake passage 2 connected to the internal combustion engine 1 is provided with: an air filter 4, which traps foreign matter in the intake air; an air flow meter 5, which detects the amount of intake air...

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Abstract

According to this internal combustion engine control method, when the intake air amount is to be increased in response to an increase in engine load and an increase in target boost pressure, valve closing control for a waste gate valve (23) is preferentially implemented over control for decreasing the nozzle opening degree of a variable nozzle (13). If, in a state in which the waste gate valve (23) is open, the nozzle opening degree of the variable nozzle (13) were to be decreased in an attempt to increase pressure energy, pressure would be allowed to leave via the waste gate valve (23). Accordingly, when the intake air amount is to be increased due to an increase in engine load, the waste gate valve (23) is preferentially operated over the variable nozzle (13) of a turbo charger (10), whereby pump loss is reduced and it becomes possible to improve fuel economy of the internal combustion engine (1).

Description

technical field [0001] The invention relates to a control method and a control device for an internal combustion engine with a turbocharger. Background technique [0002] For example, Patent Document 1 discloses an internal combustion engine having: a variable nozzle turbocharger capable of adjusting the supercharging state by adjusting the vane angle (nozzle opening) of the exhaust turbine; and The wastegate valve diverts a part of the exhaust gas guided to the exhaust turbine of the turbocharger to the downstream side of the exhaust turbine. [0003] This Patent Document 1 discloses a technique of controlling the nozzle opening of the exhaust turbine and the valve opening of the wastegate valve at the transition time. [0004] However, effective control of the wastegate valve and the variable nozzle of the turbocharger during a transition such as changing the intake air amount of the internal combustion engine has not been sufficiently studied, and there is room for furth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/18F02B37/24
CPCF02B37/18F02B37/24F02D41/0007F02M26/06Y02T10/12F02B37/183
Inventor 木村容康
Owner NISSAN MOTOR CO LTD