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Control apparatus and control method for internal combustion engine fuel injection

A fuel injection and control device technology, applied in the directions of fuel injection control, engine control, electrical control, etc., can solve the problems of fuel injection quantity deviation, inability to maintain injection quantity control accuracy, and inability to fully meet the requirements of fuel injection quantity accuracy. , to achieve the effect of improving the accuracy

Inactive Publication Date: 2010-10-27
HITACHI AUTOMOTIVE SYST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, when the waveform of the current supplied to the fuel injection valve or the magnitude of the current value is changed, the degrees of the valve closing delay and valve opening delay are changed, and the correction time to the fuel injection valve is maintained at the same correction time as before the change. In the state of power-on time, the desired fuel injection amount may deviate, and the required injection amount control accuracy cannot be maintained
On the other hand, in the above-mentioned prior art, it is not possible to sufficiently respond to such a demand for fuel injection quantity accuracy.

Method used

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  • Control apparatus and control method for internal combustion engine fuel injection
  • Control apparatus and control method for internal combustion engine fuel injection
  • Control apparatus and control method for internal combustion engine fuel injection

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Embodiment Construction

[0054] Below, use Figure 1 to Figure 11 , the configuration and operation of the fuel injection control device according to the embodiment of the present invention will be described.

[0055] First, use figure 1 Next, the configuration of an internal combustion engine system equipped with the fuel injection control device according to the present embodiment will be described. figure 1 It is a configuration diagram of an internal combustion engine system equipped with a fuel injection control device according to a first embodiment of the present invention.

[0056] An internal combustion engine (engine) 1 has a piston 2 , an intake valve 3 and an exhaust valve 4 . Intake air passes through an air flow meter (AFM) 20 , the flow rate of which is adjusted by a throttle valve 19 , and is supplied to a combustion chamber 21 of the engine 1 via an intake pipe 10 and an intake valve 3 from a collector 15 as a branch. Fuel is supplied from a fuel tank 23 to a high-pressure fuel pum...

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Abstract

Even when a current waveform and a current value of a current which is supplied to an injector is changed in order to extend a dynamic range of the injector, fuel injection quantity precision is maintained and enhanced. A correction time for correcting an opening / closing delay of the aforementioned injector is variably set by a valve response delay time calculating unit 103 and a selector unit 106 in accordance with change of setting of the current waveform and the current value.

Description

technical field [0001] The present invention relates to a fuel injection control device and method for an internal combustion engine, and more particularly, to a fuel injection control device and a control method for correcting the opening / closing delay of a fuel injection valve. Background technique [0002] A fuel injection type internal combustion engine performs calculations for converting a fuel amount determined according to an operating state into an injection time of a fuel injection valve, and controls a fuel supply amount by a fuel injection control device that controls drive of the fuel injection valve based on the injection time. [0003] The fuel injection valve is an electromagnetic valve, and a valve body is opened by a magnetic force generated by an electric current flowing through an internal solenoid (solenoid coil) to inject fuel. The amount of fuel injected by the fuel injection valve is mainly determined by the pressure difference between the pressure of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/20F02D41/30
CPCF02D2041/2055F02D2041/1431F02D2041/2044F02D2041/2058F02D41/20
Inventor 三宅威生丰原正裕滨田泰久
Owner HITACHI AUTOMOTIVE SYST LTD
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