CN2035398U

CN2035398U - Electronic ignition tester for remote sense engine

Info

Publication number: CN2035398U
Application number: CN 88213720
Authority: CN
Inventors: 潘宇成
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-08-26
Filing date: 1988-08-26
Publication date: 1989-04-05

Abstract

The utility model discloses an electronic correct timed ignition tester for a remote sense engine, which is used for detecting the test and the adjustment of the high voltage correct timed ignition and the advance angle of ignition of various gasoline engine (containing platinum ignition) ignition systems. The electronic correct timed ignition tester for a remote sense engine is composed of an oscillation voltage boost circuit, a commutation filtering circuit, a high voltage pulse harmonic receiving circuit, a broadband amplifier, a buffer amplifier, a flash tube triggering circuit, a flash tube, a convex lens and a plastic casing. Because a radio receiving circuit is used to replace the traditional high voltage pulse inductive head and the longer leading wire, the delaying effect caused by the signal lead capacitance can be overcome, and the detecting accuracy can be enhanced.

Description

Electronic ignition tester for remote sense engine

The utility model relates to a kind of electronic detecting device, particularly a kind of remote sensing formula engine timing igniting electronic detector.

Existing advanced engine timing ignition detector is utilization electronic induction and triggering synchronous flash of light principle, the flash of light bundle (planoconvex lens focusing) of detector is aimed at the flywheel (on have ignition timing to move scale) of tested motor and engine framework (on have ignition timing to decide scale), leave engine idling, can observe the relative position of two graduation lines intuitively, thereby can judge fast, easily and accurately whether the engine high pressure igniting has error.Detector is by high pressure vein ice inductive head, special signal lead-in wire, formations such as electronic circuit (containing oscillation step-up circuit, current rectifying and wave filtering circuit, buffer circuit, trigger circuit), flash tube (xenon lamp) and optical focus convex lens, plastic casing.Its purpose is for detecting all kinds of petrol engines (contain platinum igniting) the high pressure correct timed ignition of ignition system and the test of ignition advance angle, adjusting a kind of detector is provided.There is following shortcoming in the detector of this form: at first be because the long lead-in wire of employing is obtained high-voltage pulse signal from inductive head, so the detection error that the delay effect that is produced by lead capacitance causes increases; Next is because the high-voltage pulse inductive head is to utilize near capacitive way to obtain the engine high pressure pulse signal, and in moist weather, its induction reliability reduces, and causes the false triggering of instrument or does not trigger.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art and a kind of remote sensing formula engine timing igniting electronic detector that utilizes radio receiver circuit to replace special-purpose high-voltage pulse inductive head and signal lead is provided.

The purpose of this utility model can reach by following measure: the utility model is by oscillation step-up circuit, current rectifying and wave filtering circuit, buffer amplifier circuit, flash tube trigger circuit, high-voltage pulse harmonic wave receiving circuit, broadband amplifier, high pressure flash tube (xenon lamp pipe), convex lens, plastic casing group

Become.Wherein the input end of high-voltage pulse harmonic wave receiving circuit is high-voltage pulse signal receiving antenna AN, and the input end A of output terminal and broadband amplifier 2 is connected, and the output terminal B of broadband amplifier is connected with the base stage of BG4 in the buffering amplification circuit by capacitor C 5.The direct-current working volts of BG1, BG2 are 9V in the broadband amplifier 2.

Basic principle of the present utility model: when engine high pressure is lighted a fire, can send very strong pulse electromagnetic wave, wherein comprise the harmonic signal that composition is abundant in each pulse, the receiving part of these electronic detectors is for receiving the wide band receiver that this harmonic wave designs.At first, form wide band by L1, C0 again as induction of signal antenna (AN) by one section very short lead-in wire in the detector, the low reactance-resistance ratio resonant network, the common-emitter amplifier that the pulse harmonic signal that selects is formed through BG1, BG2 two-stage pipe amplifies.Signal after the amplification is coupled to BG4 through C5.BG4 is an emitter follower, makes buffer function.The output of BG4 is received the negative electrode of controllable silicon Tr by C9, R9, and D5 provides the trigger signal of controllable silicon Tr, and when Tr was triggered conducting, the C10 that has charged made B2 secondary induction high pressure promptly to the elementary discharge of B2, orders about the flash of light of xenon lamp pipe.Electronic detectors provide power supply by two joint 1.5V batteries, by oscillation boosting and current rectifying and wave filtering circuit, can obtain the direct current of 9V, 210V.Wherein the operating voltage of BG1, BG2 is got 9V, is amplification quantity and sensitivity in order to improve amplifier.

The utility model is described in further detail below in conjunction with (accompanying drawing) embodiment:

Figure (one) is a control principle skeleton diagram of the present utility model;

Figure (two) is the utility model electrical schematic diagram.

With reference to figure () and figure (two), vibration and booster circuit 6 are made up of BG3, R5, C6, B1, C11.B1 is an oscillation transformer, (1) be head end, (2) are the power supply tap terminals, are equivalent to exchange ground connection, (3) be terminal, (4) be the UL output terminal, L1 is the feedback winding, and feedback voltage is received the b-e input end of BG3 by C6, amplify paraphase through BG3, make the circuit starting of oscillation, R5 is the direct current biasing resistance of BG3, regulates it and can change the output oscillation amplitude.

After the circuit starting of oscillation, the l3(self coupling winding that boosts) to form VDC UL(after D5 rectification and C4 filtering about 9～12V) for the voltage that induces, for BG1,2 usefulness.L4 is a high pressure output winding, it and C11 form the LC resonant network, make circuit oscillation on the frequency of f0, the high pressure output AC is formed the b-e knot of the D1 serial connection BG3 in the high voltage direct current UH(rectification circuit again by C7 filtering behind D1～D4 bridge rectifier, the b-e knot current potential of BG3 is improved, helping the circuit starting of oscillation) R6 is the tank discharge resistance, but the residual high pressure after the outage of tank discharge road.

High-voltage pulse harmonic wave receiving circuit 1 and broadband amplifier 2 are made up of antenna AN, L1, C0, C1, C2, C3, C4, R1, R2, R3, R4, BG1, BG2.During the engine high pressure igniting, can produce very strong high-voltage pulse, each pulse all includes abundant harmonic components, and spectral range is quite wide.The receiving circuit of these electronic detectors is exactly a kind of reception unit that can receive this harmonic wave.By the about 10 centimetres reception of a segment length " antenna ", (about 1 meter) receives the high-voltage pulse harmonic wave from the engine high pressure igniting reliably within the specific limits.C0, L1 form low reactance-resistance ratio series resonance network, because harmonic spectrum is very wide, so the resonant frequency of C0, L1 can not make to be strict with (about general desirable 1MHZ), when the resonant frequency of the harmonic wave and the C0 of a certain frequency, L1 was identical, the Q value of input stage just can be improved.C1 is a dividing potential drop electric capacity, plays the matching effect of input circlult; BG1, BG2 form two-stage wide band resistance capacity coupled amplifier, and controllable gain is built in about 40dB, and R1, R3 are the biasing resistor of BG1, BG2, and R2, R4 are load resistance, and C3 is a coupling capacitance, and C4 is a filter capacitor.Signal after the amplification is coupled to the Buffer Amplifier 3 that BG4 forms by C5.

Buffer amplifier circuit 3 and flash tube trigger circuit 4 are made up of BG4, C8, R7, R8, Tr, R9, C9, R11, C10, D5, B2, and BG4 is connected into emitter follower, and the signal that C5 is sent here has buffer function.C3 plays the dividing potential drop effect, and R7 is a biasing resistor, and R8 is an output load resistance, can obtain output voltage U R8 on R8; UR8 adds to the trigger electrode of Tr on the one hand through D5, add to the negative electrode of Tr on the other hand through C9.R10 is the trigger gate protective resistance of Tr, and R9 is that flash tube SL(is the xenon lamp pipe for the C10 charging provides path, B2) the high-voltage pulse trigger winding.The be triggered process of flash of light of flash tube SL is: at first, forms charge circuit by elementary winding, R9, the R8 of R11, C10, B2 C10 is charged, when BG4 had output, UR8 ordered about the Tr conducting, and the C10 that is full of electricity is discharged to the elementary winding of B2.Like this, the secondary windings of B2 just can induce high-voltage pulse, drives flash tube SL flash (negative electrode of flash tube and anode have been added with operating voltage UH)

The flash of light bundle that flash tube sends through reflector and optically focused convex lens, just can form the very strong flash of light bundle of brightness.Restraint irradiation moving to petrol engine flywheel and support, the fiery timing graduation line of fixed point by flash of light, utilize stroboscopic effect, can realize just whether ignition timing observes detection.

The present invention has following advantage compared to existing technology:

1, saves high pressure pulse induction head and long signal lead, overcome to greatest extent the delay effect that signal lead electric capacity causes, improved the detection accuracy.

2, these electronic detectors arbitrarily angled high pressure pulse induction signal that all can obtain engine in about 1 meter scope from the engine radius, therefore in the use flexibly, conveniently.

3, reduce the external accessory of electronic detectors, reduced cost. And use safety has been eliminated the signal lead of conditional electronic detector just in case move into the engine flywheel etc. of at a high speed running and has been rotated accident in the parts.

Claims

1, a kind of remote sensing formula engine timing igniting electronic detector, by oscillation step-up circuit 6, current rectifying and wave filtering circuit 5, buffer amplifier circuit 3, flash tube trigger circuit 4, high pressure flash tube 7, convex lens 8 are formed, it is characterized in that: the input end of high-voltage pulse harmonic wave receiving circuit 1 is high-voltage pulse signal receiving antenna (AN), the input end A of output terminal and broadband amplifier 2 is connected, and the output terminal B of broadband amplifier 2 is connected with the base stage of BG4 in the buffer circuit by capacitor C 5.