Fuel jet device of engine

A fuel injection device and fuel injection technology, applied in fuel injection pumps, fuel injection control, engine control, etc., can solve the problems of output unstable voltage, difficulty in correctly outputting 0V, cost increase, etc., and achieve high-precision fuel control, The effect of improving detection accuracy and improving control accuracy
CN1975141AInactive Publication Date: 2007-06-06MITSUBISHI ELECTRIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI ELECTRIC CORP
Publication Date
2007-06-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a fuel injection device for engine which can detect the current on the electromagnetic winding in high precision so as to achieve the high precision of the control of the fuel injection module by arranged a biasing circuit on the detecting member for the electromagnetic winding current. The device comprises: a fuel injection module with functions that can drive a plunger to move forward and backward so as to suck the fuel or increase pressure to inject fuel when the electromagnetic winding 9 is electrified, and several sensors 20 for detecting the running state of the engine, and a control unit constituted by a micro-computer 2 for generating a driving signal to the fuel injection module according to the running state, and a current detecting member containing an operation amplifier 8 for detecting the electromagnetic winding current. The biasing current supplied by the biasing source 15 flow through the current detecting member firstly to stabilize the current value before electrified so as to achieve the high precision of the current detecting of the fuel injection module.
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Description

technical field

[0001] The present invention relates to a fuel injection device for an engine having a function of pressurizing fuel by reciprocating movement of a plunger and a function of a fuel injection valve, such as a new technology for engine fuel control of a two-wheeled vehicle. Background technique

[0002] Conventionally, it is known to drive a solenoid type engine fuel injection device using energy stored in a capacitor (for example, refer to Patent Document 1).

[0003] In the fuel injection system of this type of engine, the transistor that drives the electromagnetic coil is switched on and off under the control of a microcomputer, and the induced electromotive force generated by the electromagnetic coil charges the capacitor when the transistor is turned off.

[0004] After the electromagnetic coil current is converted into a voltage, it is amplified by an operational amplifier and input to a microcomputer. In addition, it is also input to the microcomputer w...

Claims

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