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Control devices for internal combustion engines

A technology for control devices and internal combustion engines, applied in engine control, fuel injection control, internal combustion piston engines, etc., can solve the problems of reduced exhaust gas volume, excessive temperature rise of exhaust purification catalysts, etc., to suppress temperature drop and excessive temperature rise high effect

Inactive Publication Date: 2020-03-03
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a concern that when the engine is decelerated, the exhaust gas volume decreases and the temperature of the exhaust purification catalyst rises excessively

Method used

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  • Control devices for internal combustion engines
  • Control devices for internal combustion engines
  • Control devices for internal combustion engines

Examples

Experimental program
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no. 1 example

[0043] [system structure]

[0044] figure 1 is a diagram showing the configuration of the system of the first embodiment of the present invention. figure 1 The system shown includes an internal combustion engine 10 . The internal combustion engine 10 is a diesel engine which is mounted on a vehicle and used as a power plant of the vehicle. An intake passage 14 and an exhaust passage 16 are connected to the engine body 12 of the internal combustion engine 10 . Although in figure 1 Four cylinders are depicted in the engine body 12, but this is only an example and the number of cylinders of an internal combustion engine according to the invention is not limited. Steel pistons (not shown) are disposed within each cylinder.

[0045] An air filter 18 is provided at the inlet of the intake passage 14 . A compressor 22 a of a turbocharger 22 for turbocharging intake air is provided in the intake passage 14 on the downstream side of the air cleaner 18 . Turbocharger 22 includes ...

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Abstract

A control device that determines an operation amount of an actuator that adjusts an intake air amount based on an operating condition of an internal combustion engine. The control device is configured to: calculate an index value of a piston temperature of the internal combustion engine; and at the time of deceleration in which the engine speed of the internal combustion engine decreases, when the calculated index value is an upper limit threshold value corresponding to the piston temperature When the threshold value of the index value is higher than a value corresponding to the temperature of the piston, the operation amount is corrected to an operation amount to increase the intake air amount. For example, a piston temperature estimated from a deviation between an input heat amount and a heat release amount of the piston may be used as the index value.

Description

technical field [0001] The invention relates to a control device for an internal combustion engine. Background technique [0002] Patent Document 1 discloses an emission control device for an internal combustion engine that burns to remove particulate matter (PM) contained in exhaust gas in an exhaust purification catalyst. The air contained in the exhaust gas plays a role of taking heat away from the catalyst and suppressing an increase in the temperature of the catalyst during purification of the catalyst by the exhaust gas. Therefore, there is a concern that when the engine is decelerated, the exhaust gas volume decreases and the temperature of the exhaust purification catalyst rises excessively. In the device of Patent Document 1, as a countermeasure against the above-mentioned problem, when the engine decelerates in a state where the accumulated amount of PM is large, control for suppressing an increase in the intake air amount is executed. [0003] The following is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/12
CPCF02D41/12F02D2200/101F02D2200/021F02D41/123F02D41/0005F02D2200/0802Y02T10/40F02D41/0002
Inventor 山下晃
Owner TOYOTA JIDOSHA KK