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Control method and control device for internal combustion engine

A control method and technology of an internal combustion engine, which are applied in engine control, fuel injection control, electrical control, etc., can solve problems such as vehicle vibration deterioration, and achieve the effect of suppressing vehicle vibration.

Active Publication Date: 2022-03-11
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If reverse phase torque is applied at inappropriate timing, vehicle vibration may worsen

Method used

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  • Control method and control device for internal combustion engine
  • Control method and control device for internal combustion engine
  • Control method and control device for internal combustion engine

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

[0014] figure 1 It is an explanatory diagram schematically showing a system configuration of an internal combustion engine 1 according to an embodiment. The internal combustion engine 1 is, for example, an in-line 3-cylinder spark ignition type internal combustion engine. A spark plug 4 is provided in the center of a combustion chamber surrounded by an intake valve 2 and an exhaust valve 3. A variable valve positive valve (not shown) is provided on the intake valve 2 side. time body. A fuel injection valve 5 that injects fuel to the intake valve 2 is arranged at the intake port 6 . In addition, the internal combustion engine 1 may be an in-cylinder direct injection type internal combustion engine that directly injects fuel into the cylinders.

[0015] The intake passage 7 connected to the intake port 6 has an intake manifold 7a, and on the upstream side of the int...

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PUM

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Abstract

An engine controller (35) of an internal combustion engine (1) executes a fuel cut when an accelerator opening degree becomes zero while a vehicle is traveling, and imparts an opposite-phase torque by supplying fuel to some of the cylinders so that vibrations in the front-rear direction of the vehicle caused by torsional vibrations of a drive system associated with the fuel cut are cancelled. When the torque of the internal combustion engine (1) immediately before fuel is cut off for forced regeneration of the GPF (18) is greater than normal, the timing at which the reverse-phase torque is applied is delayed compared to normal time. A cylinder whose ignition timing approaches a timing at which the timing at which the torque of the drive shaft is changed from positive to negative as the starting point of the vibration is delayed by a 1 / 4 cycle of the torsional vibration is selected as a combustion cylinder.

Description

technical field [0001] The present invention relates to a control method and a control device for an internal combustion engine, which execute a fuel cut when the accelerator opening becomes 0 while the vehicle is running, and pass the The opposite phase torque is given by supplying fuel to a part of the cylinders. Background technique [0002] It is known that in order to reduce the fuel consumption of a vehicle internal combustion engine, fuel supply is stopped, that is, a fuel cut is performed in accordance with a predetermined fuel cut permission condition when the accelerator opening becomes 0 during running. [0003] When such a fuel cut is executed, the generated torque of the internal combustion engine decreases stepwise, thereby generating torsional vibration of the drive system, and the torsional vibration generates vibration in the vehicle longitudinal direction. Patent Document 1 discloses a technique for imparting reverse phase torque by supplying fuel to some ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/34F02D41/12
CPCF02D41/123F02D2250/21F02D41/0087F02D41/029F02D2200/602F02D2250/28F02D41/023F02D41/0055F02D41/0085F02D41/0225F02D41/16F02D41/401F02D2200/1002F02D2200/101
Inventor 远田让神谷光平江尻纪明小林智明
Owner NISSAN MOTOR CO LTD