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Control device for fuel injection valve

A technology for fuel injection valves and control devices, which is applied in the direction of fuel injection devices, fuel injection control, electrical control, etc., and can solve the problems of increased individual differences in fuel injection valves, such as the deviation of the injection amount in the half-lift area, and achieve the effect of avoiding deterioration

Active Publication Date: 2022-03-04
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This half-lift control performs high-precision control in the state (hereinafter referred to as the half-lift region) before the spool provided in the fuel injection valve fully reaches the valve opening position (hereinafter referred to as the full lift), but as we know, Injection amount variation in the half-lift region increases due to individual differences in fuel injection valves

Method used

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  • Control device for fuel injection valve
  • Control device for fuel injection valve
  • Control device for fuel injection valve

Examples

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Embodiment Construction

[0038] Next, an embodiment of a fuel injection valve control device (fuel injection control device) according to the present invention will be described with reference to the drawings.

[0039] Furthermore, in this embodiment, the fuel injection valve is an electromagnetic fuel injection valve that injects fuel into the combustion chamber of an internal combustion engine, and the lift of the spool can be changed in two stages of driving lift (large lift, small lift). The fuel injection valve of the quantity variable lift mechanism and the fuel injection control device are used as the control device of the internal combustion engine. Of course, as the fuel injection valve, it is possible to use an electromagnetically driven fuel injection valve with a multi-stage (for example, 3 Level or above) to drive the appropriate valve of the variable lift mechanism whose lift changes the lift of the spool.

[0040] figure 1 A basic configuration example of an internal combustion engine ...

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Abstract

In a fuel injection valve having two or more stages of variable lift mechanisms, when fuel injection is performed with a lift different from that commanded, deterioration of exhaust emission or torque fluctuation may occur. The present invention relates to a control device for a fuel injection valve. The fuel injection valve has a variable lift mechanism with more than two stages. The inflection point of the voltage is used to detect the driving lift of the fuel injection valve, and if the detected driving lift is different from the commanded driving lift, the commanded driving lift is limited.

Description

technical field [0001] The present invention relates to a control device for a fuel injection valve for injecting and supplying fuel to an internal combustion engine. Background technique [0002] In recent years, due to the strengthening of vehicle fuel consumption and emission control, it is required to simultaneously achieve low fuel consumption and high power of internal combustion engines and adapt to a wide operating range of internal combustion engines. One of the means of achieving this is to require an expansion of the dynamic range of the fuel injection valve. [0003] To expand the dynamic range of fuel injection valves, it is necessary to improve the dynamic flow rate characteristics while maintaining the conventional static flow rate characteristics. As a method for improving this dynamic flow rate characteristic, it is known to reduce the minimum injection amount by half-lift control. [0004] This half-lift control performs high-precision control in the stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/20F02M51/00F02M51/06
CPCF02D41/20F02M51/0685F02M51/0625F02M63/0068F02M63/0063F02D41/3005F02D2041/2055F02D41/38F02D2041/2003F02D2041/2058F02D2200/063F02M51/061F02M61/04F02M61/14
Inventor 板羽史博向原修宫本明靖饭塚智
Owner HITACHI ASTEMO LTD
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