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Engine fuel injection control device

A technology of fuel injection and control device, which is applied in the directions of fuel injection control, engine control, machine/engine, etc., can solve problems such as deviation, and achieve the effect of easy detection

Active Publication Date: 2017-01-04
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, the air screw is adjusted by the driver while the engine is running, and the KBUK may deviate during acceleration.

Method used

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  • Engine fuel injection control device
  • Engine fuel injection control device
  • Engine fuel injection control device

Examples

Experimental program
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Embodiment Construction

[0075] Next, preferred embodiments disclosed in the fuel injection control device for an engine according to the present invention will be described in detail with reference to the drawings.

[0076] figure 1 It is a block diagram showing the configuration of a fuel injection control device 12 of an engine 10 according to the present embodiment, and a piston 16 is slidably fitted in a cylinder bore 14 of the engine 10 mounted on a vehicle such as a motorcycle. The cylinder head 18 of the engine 10 is connected to an intake pipe 22 for supplying an air-fuel mixture to the combustion chamber 20 and an exhaust pipe 24 for discharging exhaust gas from the combustion chamber 20 . A catalytic converter 26 is attached to the exhaust pipe 24 . A spark plug 28 , an intake valve 30 and an exhaust valve 32 are attached to the cylinder head 18 , the tip of which protrudes inside the combustion chamber 20 .

[0077] The intake pipe 22 is provided with a throttle valve 34 capable of openi...

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PUM

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Abstract

Provided is an engine fuel injection control device capable of detecting that the air screw is adjusted. The fuel injection control device (12) of the engine (10) includes a bypass passage (36) connecting the upstream and downstream sides of the throttle valve (34) of the intake pipe (22) and an air screw that opens and closes the bypass passage (36). (38), the feedback correction amount KO2 is calculated based on the oxygen concentration in the exhaust gas, and the variation amount of the feedback correction amount KO2 relative to the reference value is calculated in a plurality of feedback areas divided according to the throttle opening. The absolute value of the difference between the learning value KBU obtained by multiplication and the learning value KBU in the feedback area where the throttle opening is on the low side and the learning value KBU in the feedback area where the throttle opening is on the high side exceeds the threshold value. In this case, it is detected that the air screw 38 is adjusted.

Description

technical field [0001] The present invention relates to a fuel injection control device for an engine performing O2 feedback control. Background technique [0002] In Patent Document 1, it is described that KO2 is obtained as a parameter from an O2 sensor that detects the oxygen concentration in the exhaust gas, and KBUK (KBU), which is a parameter obtained by multiplying the fluctuation amount of KO2, is obtained. The obtained KO2 and KBUK correct the basic injection quantity to calculate the final fuel injection quantity. Here, the KBUKs are stored in a plurality of learning areas divided by the throttle opening and the engine speed, and the KBUK corresponding to the current operating state is used. [0003] In addition, Patent Document 2 discloses that an air screw for opening and closing the idle air control passage is provided in the idle air control passage connecting the upstream and downstream of the throttle valve in order to adjust the idle rotation speed. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14
Inventor 井畑辽亮宇津木克洋三木浩太郎
Owner HONDA MOTOR CO LTD
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