CN2387280Y

CN2387280Y - Igniting module of mosfet switching tube

Info

Publication number: CN2387280Y
Application number: CN 96211497
Authority: CN
Inventors: 冷玉福
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-11
Filing date: 1996-06-11
Publication date: 2000-07-12
Anticipated expiration: 2006-06-11

Abstract

The utility model relates to an igniting module of an MOSFET switching pipe, which is used for igniting a gasoline engine and is necessary key equipment of the gasoline engine. T in a summarization accompanying drawing is 2SK1015 and is a power MOSFET switching pipe. Compared with parameters of a power Darlington 2SD2141, the utility model has the advantages of small power, large current, fast response, high switching speeds and safe and reliable work, and the switching speeds of the utility model are more than 11 times of the switching speeds of power transistors under large current. The utility model is an ideal power switching pipe in igniting modules in the world in future. The utility model mainly solves the problem that a power MOSFET switching pipe can not be developed and used as an igniting switching pipe controlled by a microcomputer. The igniting module of an MOSFET switching pipe can precede in the world.

Description

Switch mosfet pipe ignition module

At present, the structure of the ignition module (ignition module) that petrol engine uses is that ignition advance angle prevents pinking by signal processing, and angle of attachment and power switch pipe combine.When igniting reference signal after (corner signal and crankshaft-position signal) pass to ignition module, through assembly fire signal is handled, the conducting of last power controlling switching tube with end, reach the purpose of igniting.What but power switch pipe mostly used in the ignition module at present is pliotron, the power Darlington transistor and since they exist slow, the big current-responsive of switching speed poor, exist the reliability that secondary voltage punctures, causes igniting low precision, bad response, influenced petrol engine work.

The purpose of this utility model provides a kind of petrol engine ignition module, and it can improve petrol engine functional reliability, power character, responsiveness, realizes the high energy and high speed igniting, reduces fuel consume (hundred kilometers), exhaust emissions.

The purpose of this utility model is achieved in that in metal shell, carries out the fire signal disposable plates successively, and power MOSFET switch tube is electrically connected, and has constituted novel ignition module like this.Also can in the ignition module that has, replace original power tube, make it to constitute novel ignition module with power MOSFET switch tube and certain circuit.

Shown in Figure of description 2, when connecting the igniting K switch, storage battery is through R ₂, T ₁Base current is provided, makes T ₁Conducting, B point current potential reduces, T ₂End.Ignition switch was connected,, had been passed through with regard to no current in the spark coil, can prevent from not cut off that spark coil phenomenon overheated and battery discharging was taken place because of ignition switch as long as distributor shaft does not change.As sensor coil L ₁Output be negative signal the time, electric current is by D ₃→ D ₂-→ R ₁Be added in the reverse bias that A orders and make T ₁End T ₁Collector potential raise, make T ₂Conducting just has electric current to pass through in the elementary winding of spark coil.As sensor coil L ₁During for positive signal voltage, signal is through R ₁→ D ₁Be added to T ₁Base stage, make T ₁Conducting, T ₂End, primary current is cut off, and induces high voltage in the secondary windings, finishes igniting.T when be I=7A the switching time of 2SK1015 _On=0.4 μ s T _Off=0.9 μ s, T when be I=7A the switching time of 2SD2141 _On=15 μ s, T _Off=13 μ s.

Owing to adopt such scheme, can in original shell, install a signal-processing board additional, connect a power MOSFET switch tube again, just constituted novel ignition module, simple in structure.Also can replace original power switch pipe with power MOSFET switch tube and partial circuit at the petrol engine of microcomputer control igniting.

Further specify below in conjunction with drawings and Examples

Fig. 1 is contact-carrying type distributor circuit theory diagrams of the present utility model.

Fig. 2 is band magnetic sensing type distributor circuit theory diagrams of the present utility model

Because the ignition module power tube adopts power MOSFET switch tube, has following advantage; 1, it to have power controlling little, be easy to realize the microcomputer control igniting.2, has the higher voltage climbing; The switch mosfet pipe, switching speed is fast, and the pulse shape characteristics are precipitous, and its voltage build-up rate is high especially, much larger than 900V/ μ s.The higher voltage climbing to the igniting of high energy highi degree of accuracy, reduces the high-energy ignition coil.3, has higher igniting precision; The fire signal of microcomputer or the output of other ignition module, the power transistor ends and needs certain hour, and specific power Darlington transistor deadline of power MOSFET switch tube wants fast more than 10 times.4, has rotary speed property preferably.5, hundred kilometers fuel consumes have been reduced.6, functional reliability height; Puncture at big electric current secondary voltage, be better than the crystal pliotron.

Below, install the igniting signal-processing board additional, the connection power MOSFET switch tube is installed, make it to constitute an independently ignition module as can be seen as long as in the shell that has.Also can be installed in power MOSFET switch tube on the radiating fin separately, make it to become power switch pipe and the microcomputer control igniting petrol engine of independently lighting a fire and be used.

Claims

1, a kind of ignition module, in metal shell, connection contact, signal-processing board, power MOSFET switch tube are electrically connected in proper order, it is characterized in that; Connect contact and be electrically connected with an end of ignition process plate, the other end is electrically connected with power MOSFET switch tube.

2, ignition module according to claim 1 is characterized in that; Power switch pipe in the ignition module is a power MOSFET switch tube.