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Control device for internal combustion engine and control device for vehicle provided with said internal combustion engine

A technology for control devices and internal combustion engines, applied in mechanical control, engine control, fuel injection control, etc., to achieve the effect of suppressing engine oil loss

Inactive Publication Date: 2012-11-21
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, when the advance control of the closing timing of the exhaust valve is performed in order to suppress oil loss during the oil supply stop accompanied by the valve stop control of the intake valve as in the above-mentioned prior art, When the oil supply is resumed, if the action state of the intake valve returns to the valve operation state while keeping the closing timing of the exhaust valve advanced, a large amount of residual gas in the cylinder will be blown back to the intake passage.

Method used

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  • Control device for internal combustion engine and control device for vehicle provided with said internal combustion engine
  • Control device for internal combustion engine and control device for vehicle provided with said internal combustion engine
  • Control device for internal combustion engine and control device for vehicle provided with said internal combustion engine

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Experimental program
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Effect test

Embodiment approach 1

[0071] [Description of system structure]

[0072] figure 1 It is a figure for demonstrating the system structure of the control apparatus of the vehicle equipped with the internal combustion engine which concerns on Embodiment 1 of this invention.

[0073] The system of this embodiment includes a spark ignition type internal combustion engine (gasoline engine) 10 . In the present embodiment, as an example, the internal combustion engine 10 is an inline four-cylinder engine having four cylinders #1 to #4.

[0074] A piston 12 is arranged in a cylinder of the internal combustion engine 10 . In the cylinder of the internal combustion engine 10 , a combustion chamber 14 is formed on the top side of the piston 12 , and a crankcase 16 is formed on the lower side of the piston 12 . An intake passage 18 and an exhaust passage 20 communicate with the combustion chamber 14 .

[0075] An air flow meter 22 that outputs a signal corresponding to the flow rate of air sucked into the int...

Embodiment approach 2

[0104] Second, refer to Figure 5 as well as Figure 6 Embodiment 2 of the present invention will be described.

[0105] use figure 1 shown in the hardware structure, by making the ECU 40 replace Figure 4 shown in the program while executing the following Figure 6 The program shown can realize the system of this embodiment.

[0106] Figure 5 It is a time chart for explaining the characteristic control of Embodiment 2 of this invention. More specifically, Figure 5 (A) ~ (C) and image 3 (A) to (C) are similarly corresponding to the depression of the accelerator pedal, the control position of the opening and closing timing of the exhaust valve 32, and the F / C mark (valve return command), Figure 5 (D) shows a waveform showing a change in the peak value of the in-cylinder pressure (peak in-cylinder pressure) in one cycle of the internal combustion engine 10 .

[0107] Such as Figure 5 As shown in (A) and (B), when the depression of the accelerator pedal is detected...

Embodiment approach 3

[0117] Second, refer to Figure 7 as well as Figure 8 Embodiment 3 of the present invention will be described.

[0118] use figure 1 The hardware structure shown enables the ECU 40 to replace the Figure 4 shown in the program while executing the following Figure 8 The program shown in the figure realizes the system of this embodiment.

[0119] Figure 7 It is a time chart for explaining the characteristic control of Embodiment 3 of this invention. More specifically, Figure 7 (A) shows a waveform representing the actual gear position of the shift lever, Figure 7 (B) shows a waveform representing the detection information of the position sensor 52 , Figure 7 (C) shows a waveform indicating the control position of the opening and closing timing of the exhaust valve 32 . In addition, in Figure 7 In the situation shown, the accelerator pedal is not depressed (that is, the recovery request from the fuel stop is not issued).

[0120] As in Embodiments 1 and 2 descri...

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Abstract

Disclosed is a control device for an internal combustion engine that can suppress blowback of gas remaining in a cylinder into an intake passage when returning from a fuel cut while suppressing oil loss via the piston rings during execution of a fuel cut accompanying valve-stopping control of an intake valve. Further disclosed is a control device for a vehicle provided with said internal combustion engine. During execution of a fuel cut accompanying intake-valve-stopping control, control for advancing the opening / closing period of an exhaust valve (32) is executed. When a request for return from the abovementioned fuel cut is detected, in the case where the abovementioned control for advancing is being executed, the amount of advancement of the opening / closing period of the exhaust valve (32) is delayed in a manner so that the amount of advancement is no more than a predetermined value.

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine and a control device for a vehicle including the internal combustion engine, and more particularly to a control device for an internal combustion engine equipped with a valve stop mechanism capable of stopping and maintaining an intake valve at a closed position, and a vehicle including the same control device. Background technique [0002] Conventionally, for example, Patent Document 1 discloses a control device for a multi-cylinder internal combustion engine. In this conventional control device, during the reduced-cylinder operation in which the operation of some cylinders is stopped, the operation of the intake valve of the stopped cylinder is stopped at the valve closed position. On this basis, the opening timing of the exhaust valve of the deactivated cylinder is delayed so as to be a predetermined timing later than the expansion bottom dead center, and the closin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/02F01L13/00F02D41/12F02D43/00
CPCF02D13/08F01L1/34Y02T10/18F02D41/126F02D2041/001F02D2041/0012F02D17/02F01L13/0005F02D41/3863Y02T10/12F02D13/06F02D13/0203F02D2700/056F02D2700/058
Inventor 木户冈昭夫竺原庆和
Owner TOYOTA JIDOSHA KK
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