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Controllers for Internal Combustion Engines

A technology for internal combustion engines and controllers, which is applied in engine control, fuel injection control, electrical control, etc., and can solve problems such as increasing the cost of internal combustion engine control systems

Active Publication Date: 2017-03-01
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these temperature sensors increase the cost of the internal combustion engine control system due to the increased manufacturing steps required to install the sensor on the engine, as well as the increased number of wires

Method used

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  • Controllers for Internal Combustion Engines
  • Controllers for Internal Combustion Engines
  • Controllers for Internal Combustion Engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] An embodiment of a controller applied to an air-cooled single-cylinder engine mounted on a vehicle (especially a motorcycle) will be described below.

[0038] figure 1 The complete structure of the control system in this embodiment is shown.

[0039] Engine 10 is a four-stroke gasoline engine. That is, a combustion cycle includes four strokes of intake, compression, power generation and exhaust performed in sequence.

[0040] An air cleaner 14 , a throttle valve 16 and an intake pressure sensor 18 that detects intake pressure are arranged in the intake passage 12 of the engine 10 . Throttle 16 adjusts the amount of intake air provided to combustion chamber 20 of engine 10 . The degree of opening of the throttle valve 16 depends on operation of a throttle handle (not shown). Bypass passage 22 is connected to intake passage 12 in a manner that bypasses throttle valve 16 . An idle control valve 24 is provided in the bypass passage 22 to adjust the amount of intake air...

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PUM

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Abstract

The invention relates to a controller for an internal combustion engine. The thermistor (59) is arranged near the power transistor (58) of the electronic control unit (64). The thermistor (59) detects the temperature depending on the driving state of the engine (10). The temperature of the engine (10) is estimated based on the temperature detected by the thermistor (59). The higher the detected temperature, the higher the estimated engine temperature. Based on the estimated temperature of the engine (10), a fuel injector (30) is operated to perform fuel injection control.

Description

technical field [0001] The present invention relates to a controller for controlling combustion conditions of an internal combustion engine. Background technique [0002] It is well known that fuel injection control is performed based on the temperature of the internal combustion engine. JP-2011-153608A and JP-2009-191712A describe providing an internal combustion engine with a coolant temperature sensor that senses engine coolant temperature and an oil temperature sensor that senses engine oil temperature or engine body temperature. Fuel injection control is performed based on detection values ​​of the above-mentioned sensors. [0003] However, these temperature sensors increase the cost of the internal combustion engine control system due to an increased manufacturing step for installing the sensor on the engine, and an increased number of wires. Contents of the invention [0004] The object of the present invention is to provide an engine controller for an engine cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30F02D41/02
Inventor 寺田金千代吉田哲永田孝一
Owner DENSO CORP