CN103758672A - Noiseless starting diesel engine and starting method thereof - Google Patents

Abstract

The invention relates to a noiseless starting diesel engine and a starting method thereof. The oil sprayer of the diesel engine is connected to the output end of an oil spraying controller. A sparking plug is added to a cylinder cover and connected to the output end of an ignition controller. A piston is mounted in an engine cylinder block. The piston is connected with a crankshaft through a piston rod. A flywheel is connected to the crankshaft. The input end of the oil spraying controller is connected to the output end of an oil spraying control circuit. The oil spraying control circuit comprises an oil spraying AND gate circuit, an acting cylinder signal generator and a ignition signal generator, wherein the acting cylinder signal generator and the ignition signal generator are connected to the input end of the oil spraying AND gate circuit. The ignition signal generator comprises an ignition ANG gate circuit, a starting signal sensor, a crankshaft position sensor and a rotation speed sensor, wherein the starting signal sensor, the crankshaft position sensor and the rotation speed sensor are connected to the input end of the ignition ANG gate circuit. The input end of the ignition controller is connected with the output end of the square signal generator. The input end of the square signal generator is connected to the output end of the ignition signal generator. The diesel engine can be started without a motor, is short in starting time and noiseless, and production cost can be saved.

Description

Noiseless starts diesel engine and starting method thereof

Technical field

The present invention relates to a kind of diesel engine, is that a kind of noiseless starts diesel engine and starting method thereof specifically.

Background technique

When existing diesel engine starts, all to utilize motor and gear drive to drive crankshaft rotating to treat that piston reaches top dead center, then to jet atomization diesel oil in motor, be employing compression-ignition, cause mixture combustion, promote piston movement.Motor and the storage battery of the necessary supporting heaviness of this diesel engine, cost of production is high, poor reliability, and the physical life of storage battery is short, and in start-up course, noise is large, mechanical wear is serious.

Summary of the invention

The object of this invention is to provide a kind of is that bootable noiseless starts diesel engine and starting method thereof without motor, utilize the specific crank position of acting cylinder directly to in-cylinder injection gasoline, to light a fire, promote engine start, starting time, short, noise free, and can save the cost of production of motor and storage battery.

For achieving the above object, the present invention adopts following technological scheme:

Noiseless of the present invention starts diesel engine and comprises engine cylinder-body, be arranged on the firing chamber in engine cylinder-body, be arranged on the diesel injector in firing chamber, in described engine cylinder-body, piston is installed, described piston is connected with bent axle by piston rod, gasoline ejector and spark plug are also installed in described firing chamber, described gasoline ejector is connected to the output terminal of injector controller, described spark plug is connected to the output terminal of ignition controler, on described bent axle, be connected with flywheel, the input end of described injector controller is connected to the output terminal of fuel injection control circuit, described fuel injection control circuit comprises oil spout AND circuit, be connected to acting cylinder signal generator and the signal generator for ignition of oil spout AND circuit input end, described signal generator for ignition comprises igniting AND circuit, be connected to the actuating signal sensor of igniting AND circuit input end, crankshaft position sensor, speed probe, the output terminal of the input end connecting part wave generator of described ignition controler, the input end of described square wave signal generator is connected to the output terminal of signal generator for ignition, in the outer rim of described flywheel, be embedded with moving magnet, in the position corresponding with moving magnet, be installed with fixed magnet.

The starting method of above-mentioned noiseless startup diesel engine is as follows, starting control circuit is gathered actuating signal, passes through crankshaft position sensor collecting crankshaft position signal, is passed through speed probe collecting crankshaft tach signal by actuating signal sensor, whether by acting cylinder signal generator, detect current is acting cylinder, if the signal of each sensor collection meets the following conditions simultaneously, control gasoline ejector to acting spray in cylinder firing chamber fuel oil simultaneously controlling party wave generator to ignition controler, send fire signal;

Acting cylinder crankshaft position is between top dead center+10 ° ± 1 ° to lower dead center-15 ° ± 2 °;

The rotating speed that speed probe provides is less than particular value;

Actuating signal sensor collects actuating signal.

Adopt after technique scheme; be arranged on magnet on the flywheel cylinder crankshaft that can make to do work and avoid the dead angle of top dead center in engine shutdown; during startup directly to in-cylinder injection fuel oil and light and start; without motor start-up; starting time, short, noise free, and can save the cost of production of motor and storage battery.

Accompanying drawing explanation

Fig. 1 is the electrical schematic diagram of the startup controller of one embodiment of the invention.

Fig. 2 is the structural representation of flywheel.

Fig. 3 is the structure principle chart of the diesel engine of one embodiment of the invention.

Embodiment

As shown in Figure 3, noiseless of the present invention starts diesel engine and comprises engine cylinder-body, is arranged on firing chamber in engine cylinder-body, is arranged on the diesel injector 41 in firing chamber, in described engine cylinder-body, piston is installed, described piston is connected with bent axle by piston rod, and gasoline ejector 4 and spark plug 42 are also installed in described firing chamber.

As shown in Figure 1, described gasoline ejector 4 is connected to the output terminal of injector controller 5, described spark plug 42 is connected to the output terminal of ignition controler 6, on described bent axle, be connected with flywheel 1, the input end of described injector controller 5 is connected to the output terminal of fuel injection control circuit, utilizes fuel injection control circuit to control injector controller 5 work; Described fuel injection control circuit comprises oil spout AND circuit IC1, is connected to acting cylinder signal generator S2 and the signal generator for ignition of oil spout AND circuit IC1 input end, only, in the situation that do work cylinder signal generator S2 and signal generator for ignition all send correct signal, fuel injection control circuit just sends fuel injector control signal.Described signal generator for ignition comprises igniting AND circuit IC2, is connected to actuating signal sensor S3, crankshaft position sensor S4, the speed probe S5 of igniting AND circuit IC2 input end, only, in the situation that each sensor all sends correct signal, signal generator for ignition just sends fire signal to next stage; The output terminal of the input end connecting part wave generator F of described ignition controler 6, the input end of described square wave signal generator F is connected to the output terminal of signal generator for ignition, when square wave signal generator F receives the fire signal that ignition controler 6 sends, square wave signal generator F sends the firing pulse of characteristic frequency continuously, and cylinder plug ignition makes to do work.In the outer rim of described flywheel 1, be embedded with moving magnet 2, in the position corresponding with moving magnet 2, be installed with fixed magnet 3.Moving magnet 2 is relative with fixed magnet 3 homopolarities; and make moving magnet 2 turn to bent axle when approaching fixed magnet 3 position most and be positioned at top dead center position, like this, utilize the principle of magnet two like magnetic poles repel each other; the cylinder crankshaft that can make to do work after engine shutdown is avoided top dead center, so that start smoothly.

The starting method of above-mentioned noiseless startup diesel engine is as follows: control circuit is gathered actuating signal, passes through crankshaft position sensor S4 collecting crankshaft position signal, passed through speed probe S5 collecting crankshaft tach signal by actuating signal sensor S3, and whether by the cylinder signal generator S2 that does work, detect current is acting cylinder.Actuating signal can directly gather from ignition switch, also can come from acceleration cable switch; Crankshaft position sensor S4 can be that Hall transducer, photoelectric sensor or other can detect the sensor of crankshaft rotating position; Speed of crankshaft signal can be from engine speed indicator or speed of crankshaft signal; Acting cylinder signal generator S2 can adopt independently sensor to produce acting cylinder signal, also can utilize the signal process circuit conversion of a plurality of crankshaft position sensors generations or calculate acting cylinder signal.

If the signal of each sensor collection meets the following conditions simultaneously, control gasoline ejector 4 to acting spray in cylinder firing chamber atomization gas simultaneously controlling party wave generator F to ignition controler 6, send fire signal;

Acting cylinder crankshaft position is between top dead center+10 ° ± 1 ° to lower dead center-15 ° ± 2 °;

The rotating speed that speed probe S5 provides is less than setting value, and this rotating speed particular value can be defined as idling or a little more than the engine speed of idling, guarantee that motor has entered normal operation;

Actuating signal sensor S3 collects actuating signal.

The present invention uses oil sprayer, the ECUDeng mechanism of existing diesel engine, increases start-up routine in ECU.Relatively there is following advantage with traditional design: reduce cost, reduced oil consumption, alleviated weight, reduce motor discharge, more low-carbon (LC), more environmental protection, sharpest edges are without any kinetic friction parts, have improved reliability, have eliminated radio interference.Fuel-firing gas-firing explosive force is much larger than traditional starter motor power, and starting time is shorter.

During startup, by crankshaft position sensor S4 obtain top dead center+10 ° of acting cylinder ± 1 ° to lower dead center-15 ° ± signal of 2 °, the arbitrarily angled inner direct gasoline of this scope, igniting simultaneously, conventional igniting is monopulse, and the present invention uses 1KHZ rectangular pulse signal to carry out continuous ignition for guaranteeing its reliability.Promote piston descending rapidly, when rotating speed is more than or equal to 1.1-1.2 times of specified idling, when stopping start-up routine, proceeds to normal working procedure and be subject to ECU to control igniting.Engine speed do not reach 1.1-1.2 times of idling the next one enter acting cylinder and continue to carry out start-up routine.

During engine misses electric ignition four cylinder engine wherein a cylinder piston be necessarily parked within the scope of expansion stroke top dead center+10 ° ± 1 ° to lower dead center-15 ° ± 2 °, consider artificial origin or force to be parked in the special circumstances of top dead center because of misoperation, three arc neodymium-iron-boron permanent magnets are set especially, two moving magnets are inlaid in respectively the 180 relative positions of degree, flywheel edge, another piece fixed magnet is arranged on the fixing positions such as frame, make the homopolarity of moving magnet and fixed magnet relative, utilize the principle of magnet two like magnetic poles repel each other to make to avoid within the scope of expansion stroke top dead center+10 ° ± 1 ° to lower dead center-15 ° ± 2 °, piston is parked in to meet and starts in the scope requiring, for starting next time, prepare.

Claims (2)

1. noiseless starts diesel engine, comprise engine cylinder-body, be arranged on the firing chamber in engine cylinder-body, be arranged on the diesel injector (41) in firing chamber, in described engine cylinder-body, piston is installed, described piston is connected with bent axle by piston rod, it is characterized in that: gasoline ejector (4) and spark plug (42) are also installed in described firing chamber, described gasoline ejector (4) is connected to the output terminal of injector controller (5), described spark plug (42) is connected to the output terminal of ignition controler (6), on described bent axle, be connected with flywheel (1), the input end of described injector controller (5) is connected to the output terminal of fuel injection control circuit, described fuel injection control circuit comprises oil spout AND circuit (IC1), be connected to acting cylinder signal generator (S2) and the signal generator for ignition of oil spout AND circuit (IC1) input end, described signal generator for ignition comprises igniting AND circuit (IC2), be connected to the actuating signal sensor (S3) of igniting AND circuit (IC2) input end, crankshaft position sensor (S4), speed probe (S5), the output terminal of the input end connecting part wave generator (F) of described ignition controler (6), the input end of described square wave signal generator (F) is connected to the output terminal of signal generator for ignition, in the outer rim of described flywheel (1), be embedded with moving magnet (2), in the position corresponding with moving magnet (2), be installed with fixed magnet (3).

2. noiseless as claimed in claim 1 starts the starting method of diesel engine, it is characterized in that step is as follows: control circuit gathers actuating signal by actuating signal sensor (S3), by crankshaft position sensor (S4) collecting crankshaft position signal, by speed probe (S5) collecting crankshaft tach signal, whether by acting cylinder signal generator (S2), detect current is acting cylinder, if the signal of each sensor collection meets the following conditions simultaneously, control gasoline ejector (4) to acting spray in cylinder firing chamber fuel oil simultaneously controlling party wave generator (F) to ignition controler (6), send fire signal,

Acting cylinder crankshaft position is between top dead center+10 ° ± 1 ° to lower dead center-15 ° ± 2 °;

The rotating speed that speed probe (S5) provides is less than setting value;

Actuating signal sensor (S3) collects actuating signal.

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