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Controller of internal combustion engine

A technology for control devices and internal combustion engines, applied in engine control, fuel injection control, electrical control, etc., can solve problems such as errors in the amount of air filled in cylinders, and achieve simple and accurate calculations

Inactive Publication Date: 2007-06-06
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when estimating the amount of air in the cylinder and simplifying the calculation formula as described above, such backflow of air is not taken into consideration, and an error occurs in the calculated amount of air in the cylinder.

Method used

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  • Controller of internal combustion engine
  • Controller of internal combustion engine
  • Controller of internal combustion engine

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Embodiment Construction

[0029] Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the application of the present invention to a four-stroke in-cylinder injection type spark ignition internal combustion engine. In addition, the present invention can also be applied to other spark ignition type internal combustion engines or compression ignition type internal combustion engines.

[0030] As shown in FIG. 1 , in this embodiment, an internal combustion engine main body 1 having, for example, 8 cylinders includes a cylinder block 2 , a piston 3 reciprocating in the cylinder block 2 , and a cylinder head 4 fixed to the cylinder block 2 . A combustion chamber 5 is formed between the piston 3 and the cylinder head 4 . On each cylinder, an intake valve 6 , an intake port 7 , an exhaust valve 8 and an exhaust port 9 are provided on the cylinder head 4 . In addition, as shown in FIG. 1 , an ignition plug 10 is provided at the central portion of ...

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Abstract

The quantity of air filling a cylinder is divided into a first quantity of air and a second quantity of air. The first quantity of air and the second quantity of air are calculated respectively and summed to calculate the quantity of air filling the cylinder. The first quantity of air is the surplus quantity of air filling the cylinder for the quantity of air passing through a throttle valve resulting from intake stroke. Intake pressure lowering amount, i.e. lowering amount of intake pressure resulting from intake stroke, is detected for each cylinder and total value of lowering amount of intake pressure within the range of 720 DEG crank angle is calculated. The first quantity of air is calculated based on the lowering amount of intake pressure and the total value of lowering amount of intake pressure. With such an arrangement, the quantity of air filling the cylinder can be calculated easily and accurately.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] When there are multiple cylinders, only the air of the throttle valve passes the air volume through the throttle valve and flows into the intake pipe from the throttle valve to the intake valve, and when the intake stroke is performed, only the air of the filling air volume in the cylinder passes through the corresponding inlet. In an internal combustion engine in which the valve flows out from the intake pipe and is filled into each cylinder, it is known to calculate the in-cylinder filling air amount of each cylinder using an equation obtained from the law of mass conservation with respect to the intake pipe and the equation of state with respect to the air in the intake pipe (Refer to Japanese Patent Laid-Open No. 2002-70633). [0003] In order to calculate the amount of air charged into the cylinder using this formula, it is necessary to find...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/18F02D45/00
Inventor 秤谷雅史角冈卓
Owner TOYOTA JIDOSHA KK