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Internal combustion engine and method for controlling same

A technology for internal combustion engines and control devices, applied in engine control, internal combustion piston engines, electrical control, etc., can solve problems such as accumulation of lubricating oil, failure to perform reduced-cylinder operation, and failure to perform

Active Publication Date: 2018-08-21
ISUZU MOTORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there is a problem that lubricating oil accumulates inside the combustion chamber of the cylinder that has been idle for a long time.
[0006] That is, in the reduced-cylinder operation in which only specific cylinders are put to sleep, there is a problem that the 7-cylinder operation or the 5-cylinder operation of the 8-cylinder engine cannot be performed, and the 5-cylinder operation of the 6-cylinder engine cannot be performed due to the reduced-cylinder operation. The output range of the engine becomes discontinuous, so the operating area of ​​the reduced-cylinder operation will be narrowed
Furthermore, in the case of an engine with an odd number of cylinders, such as a 5-cylinder engine or a 3-cylinder engine, in the reduced-cylinder operation in which only specific cylinders are put to sleep, there is no combination with equal intervals or good cylinder balance, so the reduction cannot be performed. Cylinder running

Method used

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  • Internal combustion engine and method for controlling same
  • Internal combustion engine and method for controlling same
  • Internal combustion engine and method for controlling same

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Embodiment Construction

[0034] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. figure 1 The engine 10 constituted by the embodiment of the present invention is illustrated. The engine 10 is a multi-cylinder engine having a predetermined number of cylinders Nc (here, three cylinders) of cylinders 11, and can switch between the full-cylinder operation Oa and the reduced-cylinder operation Or. In addition, in the drawing, #1 represents the first cylinder, #2 represents the second cylinder, and #3 represents the third cylinder.

[0035] The engine 10 has: three cylinders 11 ; three fuel injection valves 12 respectively arranged on each of the cylinders 11 ; and a total of four intake and exhaust valves 13 , two of which are arranged on one cylinder 11 It is used for intake, and two are configured for exhaust. In addition, although the in-line 3-cylinder engine having the three cylinders 11 arranged in-line is exemplified in this embodimen...

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Abstract

The present invention is equipped with a control device (40) for adjusting a fuel injection valve (12) and a resting mechanism (30), and performing a control for switching between: all-cylinder operation (Oa), during which the combustion cycle is always underway in all cylinders 11; and reduced-cylinder operation (Or), during which the combustion cycle is always underway in a number of cylinders (11) that is less than a cylinder number (Nc). Therein, the reduced-cylinder operation (Or) involves performing a partial operation during which all cylinders (11) repeatedly alternate between an operating state and a resting state.

Description

technical field [0001] The present invention relates to an internal combustion engine and a method for controlling the same, and more particularly, to suppressing white smoke generated when switching from reduced-cylinder operation to full-cylinder operation, while expanding the operating region of the reduced-cylinder operation, even if the number of cylinders is An internal combustion engine capable of reduced-cylinder operation even with odd numbers and a control method thereof. Background technique [0002] Regarding an engine (internal combustion engine), an engine has been proposed that enables reduced-cylinder operation in which a specific cylinder is shut down as a measure to reduce fuel consumption (for example, refer to Patent Document 1). In such an engine, by stopping the injection of fuel in a specific cylinder and the operation of the intake and exhaust valves, other operating cylinders are operated at a high load to improve fuel economy. [0003] However, in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D17/02F02D13/06
CPCF02D13/06F02D17/02F02D41/0087F02D2041/0012Y02T10/12F01L13/0036
Inventor 角田宏
Owner ISUZU MOTORS LTD
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