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Internal combustion engine controlling device

A technology of internal combustion engine control and internal combustion engine, applied in the direction of engine control, internal combustion piston engine, electrical control, etc., can solve the problem of not being able to effectively suppress pre-ignition, and achieve the goal of suppressing the occurrence of pre-ignition, suppressing temperature rise, and reducing the actual compression ratio Effect

Inactive Publication Date: 2011-10-19
TOYOTA JIDOSHA KK
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if it is the above-mentioned conventional system that suppresses the control of pre-ignition when using gasoline fuel with a low octane number, it cannot effectively suppress the occurrence of pre-ignition when using a gasoline fuel with a high-octane number, and needs to be improved.

Method used

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  • Internal combustion engine controlling device
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Embodiment approach 1

[0030] Embodiment 1. [Configuration of Embodiment 1]

[0031] figure 1 It is a figure for demonstrating the system structure of Embodiment 1 of this invention. like figure 1 As shown, the system of this embodiment includes an internal combustion engine (engine) 10 . The internal combustion engine 10 is configured as a spark ignition internal combustion engine with a supercharger. The exhaust passage 16 communicates with the exhaust side of the internal combustion engine 10 . An exhaust purification catalyst 18 for purifying harmful components in exhaust gas is arranged in the exhaust passage 16 . As the exhaust purification catalyst 18, for example, a known catalyst such as a three-way catalyst can be used.

[0032] In addition, the system of the present embodiment includes a fuel tank 12 for storing added gasoline fuel. One end of the fuel pipe 14 is connected to the fuel tank 12 . The other end of the fuel pipe 14 is connected to the fuel system of the internal combus...

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Abstract

The invention provides a internal combustion engine controlling device, which can prevent advanced ignition by means of the alkene content concentration of supplied gasoline fuel. A fuel property state detecting device (22) is adopted to detect the alkene content concentration (Co) of gasoline fuel supplied to an internal combustion engine (10) (Step 100). When the alkene content concentration (Co) is higher than a prescribed value (x), an advanced ignition control is performed (Step 102 and 106). The advanced ignition control is achieved by changing the upper limit value of a supercharging pressure into a value lower than a common one in an internal combustion engine having a supercharger. Or the advanced ignition control is achieved by setting a low compression ratio in case of high load in an engine having a changeable compression ratio; delaying the closure correct time control of an inlet valve; delaying the ignition timing control of the internal combustion engine (10), or increasing the output distribution control of a motor in a hybrid power vehicle, etc.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] Conventionally, pre-ignition (pre-ignition) is known as one form of abnormal combustion in an internal combustion engine. Pre-ignition is a phenomenon in which the air-fuel mixture spontaneously ignites from an overheated portion in the combustion chamber before the normal ignition timing of the spark plug during the compression stroke of the piston. When pre-ignition occurs, the air-fuel mixture is compressed while being combusted, so the pressure and temperature in the combustion chamber may become abnormally high. [0003] Therefore, conventionally, for example, Japanese Patent Application Laid-Open No. 2004-52624 discloses a system for suppressing the occurrence of pre-ignition irrespective of the octane number of gasoline fuel. In this system, when low-octane regular gasoline is used for a high-octane gasoline specification internal combust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D19/06F02D43/00
CPCF02D41/0007F02D2041/001F02D2200/0611F02P5/1527Y02T10/12Y02T10/40
Inventor 横尾望中田浩一
Owner TOYOTA JIDOSHA KK
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