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Control device for internal combustion engine

A control device, a technology for internal combustion engines, applied in engine control, fuel injection control, electrical control, etc., can solve problems such as excessive temperature rise, malfunction or failure of electronic parts, and achieve the effect of preventing temperature rise and suppressing heat generation

Inactive Publication Date: 2015-11-18
HITACHI AUTOMOTIVE SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the temperature inside the ECU with the built-in valve opening voltage generating unit rises excessively, and electronic components in the ECU may malfunction or malfunction.

Method used

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  • Control device for internal combustion engine
  • Control device for internal combustion engine
  • Control device for internal combustion engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 1 The block diagram of the internal combustion engine system of the present invention is shown in the figure. This figure shows a sectional view of the internal combustion engine 11 .

[0024] The intake air is adjusted by the throttle valve 2 to adjust the intake volume. The intake air is measured by the air flow meter 1 , and the signal is sent to the ECU (Engine Control Unit) 7 .

[0025] Then, the intake air enters the combustion chamber 12 of the internal combustion engine through the intake valve 17 and forms an air-fuel mixture together with the fuel injected from the fuel injection valve 3 . The above-mentioned fuel injection valve 3 is controlled to open and close according to a signal from the ECU 7 .

[0026] The fuel-air mixture formed in the combustion chamber 12 is ignited by a spark ignition device 9 . The above-mentioned spark ignition device 9 is ignited and controlled based on a signal from the ECU 7 . The ignited mixture pushes down the pi...

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PUM

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Abstract

Provided is a control device which prevents a rise in the temperature within an ECU by suppressing the heat generated by the ECU, without using a new cooling device such as a blower fan. In step 202 (S202) the target valve-opening voltage is calculated (block 505). The valve-opening voltage is the voltage applied to the fuel injection valve when the fuel injection valve is opened. As the number of multistage injections increases, the chance that the valve-opening voltage will rise increases, and a valve-opening voltage boosting unit will generate heat, resulting in an excessive increase in the temperature within the ECU, so there is a risk that electrical components in the ECU will malfunction or be damaged. Therefore, a temperature sensor is provided in the ECU, and when the ECU temperature (500) is high it is determined that a valve-opening voltage generation unit is producing heat, so the target valve-opening voltage value is lowered.

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine that controls a fuel injection valve that directly injects fuel into a combustion chamber. Background technique [0002] In recent years, among the exhaust regulations of various countries, the regulations on exhaust gas and fuel efficiency of automobiles have become stricter. Especially among the in-cylinder injection internal combustion engines, the intake port injection internal combustion engine has the advantages of high output and low fuel consumption. The wall surface of the exhaust gas is easy to produce a part where the mixing state of fuel and air is not uniform, and HC (hydrocarbons) and fine particulate matter are easy to be discharged, which becomes a cause of deterioration of exhaust performance. [0003] As a countermeasure for improving the exhaust performance of such an in-cylinder injection internal combustion engine, Patent Document 1 discloses multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/20F02D41/02F02D41/22F02D41/34F02D45/00
CPCF02D41/20F02D41/221F02D41/26F02D41/402F02D2041/2051F02D2041/2003F02D41/30
Inventor 藤井义久福田隆夫丰原正裕
Owner HITACHI AUTOMOTIVE SYST LTD