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Temperature estimation module, control apparatus for internal combustion engine, and method for operating temperature estimation module

A technology of control device and working method, which is applied in the direction of engine control, fuel injection control, internal combustion piston engine, etc., and can solve problems such as inappropriateness

Active Publication Date: 2019-04-19
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, it may not be appropriate to decide whether to execute or stop various processes based only on the estimated actual temperature.

Method used

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  • Temperature estimation module, control apparatus for internal combustion engine, and method for operating temperature estimation module
  • Temperature estimation module, control apparatus for internal combustion engine, and method for operating temperature estimation module
  • Temperature estimation module, control apparatus for internal combustion engine, and method for operating temperature estimation module

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Embodiment approach

[0094] In addition, at least one of the items of the above-described embodiments may be changed as follows.

[0095] ・"About actual temperature estimation processing and virtual temperature estimation processing"

[0096]In the above-described embodiment, the base temperature Tb is calculated based on the two parameters of the rotational speed NE and the load factor KL, but the present invention is not limited thereto. For example, when alcohol may be mixed in the fuel, in addition to the above two parameters, the detection value of the alcohol concentration detected by the alcohol concentration sensor, etc. may also be used. Compared with the case, the base temperature Tb is calculated as a larger value. In addition, for example, when the internal combustion engine 10 includes an EGR passage connecting the exhaust passage 22 and the intake passage 12, the flow rate of the exhaust gas flowing into the intake passage 12 from the EGR passage may be divided by the intake air amo...

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Abstract

The present invention provides a temperature estimation module, a control apparatus for an internal combustion engine, and a method for operating a temperature estimation module. The temperature estimation module is applied to a control apparatus for an internal combustion engine to execute a virtual temperature estimation process that estimates a virtual temperature, which is a temperature of anexhaust purifying device under an assumption that a dither control process is not executed, based on an operation point of the internal combustion engine during execution of the dither control process. The temperature estimation module is further configured to execute an actual temperature estimation process that estimates an actual temperature of the exhaust purifying device based on a differencebetween the air-fuel ratio of a rich combustion cylinder and the air-fuel ratio of a lean combustion cylinder and based on the operation point of the internal combustion engine during execution of the dither control process.

Description

technical field [0001] The present invention relates to a temperature estimation module and a control device for an internal combustion engine provided with the temperature estimation module. In addition, the present invention relates to an operating method of a temperature estimation module. Background technique [0002] For example, Japanese Patent Application Laid-Open No. 2004-218541 describes a control device that executes a vibration control in which a part of a plurality of cylinders is The cylinder is set as a rich-burn cylinder whose air-fuel ratio is richer than the stoichiometric air-fuel ratio, and the remaining cylinders are set as the lean-burn cylinders whose air-fuel ratio is leaner than the stoichiometric air-fuel ratio. [0003] In order to monitor the temperature of the exhaust gas purification device that has been heated up during execution of the above-mentioned chatter control, it is considered to estimate the temperature of the exhaust gas purificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/14F02D41/02
CPCF02D41/024F02D41/027F02D41/029F02D41/1408F02D41/1475F02D2200/501F01N9/005F01N2260/04F01N2430/06F01N2610/03F01N2610/146F01N2900/1602F02D41/1446F02D41/22F02D41/0235F01N11/005F02D2041/389F02D41/38F02D2200/0804F02D41/008Y02T10/40B60W2510/068
Inventor 野濑勇喜正源寺良行生田英二
Owner TOYOTA JIDOSHA KK
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