Engine control device

A control device and engine technology, applied in the direction of automatic control, automatic control, combustion engine, etc., can solve the problems of complex generator control, and achieve the effect of preventing large and small deviations, reducing idle speed, and easy to obtain.

Active Publication Date: 2014-08-27
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the idle speed control device described in Patent Document 1 has the following problems. Its control of the generator is relatively complicated

Method used

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Embodiment Construction

[0035] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. figure 1 It is a block diagram showing the configuration of an engine control device according to an embodiment of the present invention.

[0036] refer to figure 1 , a cylinder head 8 is installed on the top of the cylinder 10 of the 4-stroke single-cylinder engine 5 . The engine 5 may also have a variable valve timing mechanism (VVT: Variable Valve Timing). According to the driving command of ECU50, the VVT ​​mechanism activates the control motor not shown in the figure, so as to change the opening and closing timing of the intake valve IV and exhaust valve EV. When the opening and closing timing changes, the stroke of the valve lifter also changes. . The variable state of opening and closing timing realized by the VVT ​​mechanism is transmitted to the ECU 50 via the sensor 19 for detecting the rotation angle of the control motor.

[0037] ...

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Abstract

PROBLEM TO BE SOLVED: To eliminate instability in engine rotations due to repeated small and large variations in an idling rotation speed for each cycle.SOLUTION: A crank angular velocity variation amount calculation unit 36 detects a crank angular velocity variation amount &Dgr;ω representative of an engine load. A crank angular velocity variation amount determination unit 37 advances or retards an advance angle amount in the next cycle from a reference advance angle amount depending on whether the crank angular velocity variation amount &Dgr;ω is larger than an upper threshold H or lower than a lower threshold L set in a threshold setting unit 40. Accordingly, the angular velocity variation amount &Dgr;ω in the next cycle is held within an allowable range defined by the thresholds H and L in conformity with regularity with small and large variations for each cycle. The engine load may be represented by a mean effective pressure IMEP shown in the figure.

Description

technical field [0001] The invention relates to an engine control device, which is especially suitable for making the engine work smoothly by controlling the variation of the idling speed. Background technique [0002] In recent years, people have been working on reducing fuel consumption in order to reduce the idling speed as much as possible. As in the idle speed control device described in Patent Document 1, when a decrease in crankshaft angular velocity is detected, the idle speed control device corrects a target output voltage of a generator driven by the engine to compensate for the voltage drop. When an increase in the angular velocity of the crankshaft is detected, the idle speed control device corrects the target output voltage of the generator to compensate for the increase in voltage. [0003] [Patent Document 1]: Japanese Invention Patent Laid-Open Publication No. 2004-137973 [0004] However, the idle rotation speed control device described in Patent Document ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P5/15
CPCY02T10/46Y02T10/40
Inventor 西田宪二金子哲也佐佐木富幸齐藤贤二郎
Owner HONDA MOTOR CO LTD
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