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engine control unit

A control device and engine technology, applied in the direction of engine control, combustion engine, machine/engine, etc., can solve problems such as the decrease of supercharging pressure control accuracy, and achieve the effect of improving accuracy

Active Publication Date: 2017-04-12
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If learning opportunities are not properly ensured, the accuracy of boost pressure control may decrease due to aging changes or thermal deformation of the wastegate valve

Method used

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Embodiment Construction

[0056] Embodiments are described below with reference to the drawings. In addition, the embodiments shown below are merely examples, and various modifications and technical applications not explicitly described in the following embodiments are not intended to be excluded. Each structure of this embodiment can be implemented with various modifications within the range which does not deviate from the gist, and can be chosen or combined as needed.

[0057] [1. Device configuration]

[0058] [1-1. Engine]

[0059] The engine control device of this embodiment is applied to figure 1 A vehicle-mounted gasoline engine 10 is shown (hereinafter, simply referred to as engine 10 ). The engine 10 has a supercharging system and an EGR system (exhaust gas recirculation system) using exhaust gas pressure. figure 1, represents one of the plurality of cylinders (cylinders) provided in the multi-cylinder engine 10 . In the cylinder, a freely sliding piston is installed, and the reciprocatin...

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PUM

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Abstract

PROBLEM TO BE SOLVED: To constantly secure a learning opportunity of a waste gate valve.SOLUTION: A control device 1 of an engine 10, provided with a waste gate valve 17 which is installed in a bypass circuit 32 bypassing a supercharging turbine 16A on an exhaust passage 31 and driven by an electric actuator 18, comprises: detection means 47 which detects a position of the waste gate valve 17; learning means 3a which executes first learning to learn an initial full close position ISof the waste gate valve 17 from the position Sdetected by the detection means 47 with the waste gate valve 17 fully closed before the engine 10 is started up and second learning to learn a zero point Sof the waste gate valve 17 from the position Sdetected by the detection means 47 with the waste gate valve 17 fully closed after the engine 10 is started up; and calculation means 3e which calculates a difference between learning values obtained through the first learning and the second learning.

Description

technical field [0001] The present invention relates to a control device for an engine having a supercharging system utilizing exhaust pressure. Background technique [0002] In the past, in an engine having a supercharging system utilizing the exhaust pressure of the engine, there is a technique in which an electric exhaust bypass is provided in a bypass passage for bypassing a supercharging turbine arranged on the exhaust passage. valve (on-off valve). The exhaust bypass valve is a supercharging pressure regulating valve for adjusting the supercharging state (boosting pressure). By opening and closing the electric actuator, the exhaust gas flow into the supercharging turbine is controlled to control the supercharging turbine. speed. [0003] For example, when the output of the engine is required to be high such as during acceleration, the rotation speed of the supercharging turbine is increased by reducing the opening degree of the wastegate valve or making it zero (clos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D23/00F02B37/18
CPCY02T10/12
Inventor 川边敬平石文昭村田真一
Owner MITSUBISHI MOTORS CORP