CN1093146A - Multiple-point synchronous igniter for gasoline engine - Google Patents

Abstract

Multiple-point synchronous igniter for gasoline engine relates to a kind of ignition device of gasoline engine, form by the spark coil that comprises a plurality of high-tension coils and multiple spot distributor and multi spot spark plug, the high-tension current that is produced in a plurality of high-tension coils by the multiple spot distributor respectively inflow engine cylinder multi spot spark plug a plurality of centre electrodes and between each is to the centre electrode and the other utmost point, produce a plurality of high-voltage sparks simultaneously, thereby the mixed gas in the respective cylinder is lighted.Electrical spark energy height of the present invention, initial flame nuclear is big, and the igniting good reliability also makes engine ignition start at low temperatures easily.Therefore, the present invention can be widely used as various petrolic ignition mechanisms.

Description

Multiple-point synchronous igniter for gasoline engine

The present invention relates to a kind of ignition device of gasoline engine.

Ignition mechanism is petrolic important component part, and it utilizes high-voltage spark that the mixed gas in the cylinder is lighted, made it to expand and promotes bent axle by cylinder piston and rotates.Ignition device of gasoline engine mainly comprises spark coil, distributor and spark plug three parts.Spark coil is the device that produces high-tension current, and it mainly is made up of the low voltage winding and the high-tension coil of former limit that is wound in same transformer respectively and secondary.Spark plug is to produce the device of high-voltage spark with mixed gas in the gas cylinder in cylinder, its number equates with the cylinder number, its chief component is the centre electrode and the other utmost point of corresponding ground connection that is used to produce high-voltage spark, and spark plug is installed in cylinder by a steel sleeve and covers and make the centre electrode and the other utmost point to stretch into the cylinder inner top.Distributor mainly is made of fire seperating core and switchboard, have the electric sheet that holds that equates with the cylinder number on the switchboard, fire seperating core then has and holds discharge sheet that electric sheet works in coordination with switchboard and can be driven in the switchboard inward turning by distributor shaft then the discharge sheet is linked with respectively holding electric sheet successively, and the effect of distributor promptly is by the discharge sheet and holds the centre electrode that electric sheet is assigned to the high-tension current in the high-tension coil each cylinder spark plug successively.

Petrol engine ignition mechanism of the prior art is a kind of ignition mechanism of single spark-type, promptly includes only the other utmost point of a pair of centre electrode and ground connection in the spark plug, only produces a high-voltage spark when lighting a fire at every turn.The outstanding defective of the ignition mechanism of this single spark-type is that the electrical spark energy is low, and causes a series of other problems therefrom.At first, because the electrical spark energy is little, initial flame nuclear in the cylinder during mixture combustion is also very little, it is longer that mixed gas finishes the required time by burning just, the maximum temperature that combustion gas can reach in the combustion process is on the low side, the maximum pressure that combustion gas produced is less than normal, and engine output is reduced.Secondly, because mixture combustion is slow, when wanting to make the combustion gas maximum pressure to result from 10-15 ° of angle of bent axle arrival atdc, the necessary increasing ignition advance angle of making use of momentum.But, arriving budc at bent axle, the combustion process of mixed gas can only be turned round for song again negative torque is provided, and that is to say, and some positive moment of torsion will be offset by negative torque and be caused the waste of merit, and engine output is reduced.The 3rd, because the rated speed of petrol engine is very high, the permission of mixed gas is very of short duration period of combustion in the single cylinder, and the Actual combustion process is very slow, thereby certainly will cause mixture combustion insufficient, unburnt inflammable gas enters atmosphere with waste gas, not only causes the waste of fuel, also can cause the pollution to atmosphere environment.Burn away in gas exhaust piping if contain the waste gas of inflammable gas, may cause also then that the petrol engine exhaust back pressure increases, exhaust sound strengthens, not only can bring noise hazard, also can influence intake process next time and reduce the output power of motor.In addition, the functional reliability of single spark-type ignition mechanism is relatively poor, especially more is difficult to make the petrol engine ignition trigger under the low temperature and moisture state.

Purpose of the present invention promptly is to obtain the high petrol engine ignition mechanism of a kind of electrical spark energy, improving the functional reliability of ignition mechanism, and finally improves the output power of motor, reduces fuel consumption.

To achieve these goals, the present invention is provided with more than two pairs mutually the independently other utmost point of centre electrode and ground connection in same cylinder spark plug, to obtain a kind of multi spot spark plug; Meanwhile, equal number is set in spark coil same around to, with number of turn high-tension coil, and the high-tension current that produces in each high-tension coil is introduced each centre electrode of multi spot spark plug respectively by the multiple spot distributor, make each to producing a plurality of high-voltage sparks simultaneously between the centre electrode and the other utmost point.So-called multiple spot distributor be many groups of having on distributor fire seperating core and the switchboard that the group number equates with the high-tension coil number discharge sheets with hold electric sheet, when fire seperating core rotates in switchboard under distributor shaft drives, many group discharge sheets and hold electric sheet and links respectively, the high-tension current that produces in each high-tension coil are respectively through each group discharge sheet with hold electric sheet and flow into same each centre electrode of cylinder spark plug.From improving the electrical spark viewpoint of energy, in the spark plug electrical spark count The more the better, still, counting when too much of electrical spark, the structure that makes spark plug is become very complicated, and the volume of spark plug also can correspondingly strengthen, and the spark plug on the cylinder head revolves the hole and also certainly will strengthen.In order under the situation that does not change the available engine air cylinder head structure, to replace single spark-type spark plug, select spark to count to be at 3 to suit with the multi spot spark plug.Being example with 3 simultaneous ignition devices of petrol engine promptly below is described in further detail the technical characteristics of multiple-point synchronous igniter for gasoline engine of the present invention.

Accompanying drawing 1 is the electrical schematic diagram of 3 simultaneous ignition devices of petrol engine;

Accompanying drawing 2,3,4 is respectively front view, the top and bottom perspective views of 3 spark plugs;

Accompanying drawing 5,6 is respectively the A-A sectional view and the plan view of 3 distributors.

With reference to the accompanying drawings 1,3 simultaneous ignition devices of petrol engine mainly are made up of spark coil, 3 distributor F and 3 spark plug H.Spark coil comprises 1 low voltage winding L and 3 high-tension coil L1, L2, L3, is wrapped in former limit and the secondary of same transformer T respectively.3 high-tension coil L1, L2 and L3 are around to identical, equal turn numbers, so the size of the high-tension current that produces in each high-tension coil all identical with phase place (synchronously).

2-4 with reference to the accompanying drawings, 3 spark plugs mainly are made of insulating ceramic, steel sleeve and 3 centre electrodes.Insulating ceramic 1 is cylindrical, is made by the insulation porcelain material, and its central authorities have the through hole that 3 one-tenth " product " font distributes, and the top has " Y " shape barricade 2 and each through hole is separated, and the middle part has the shoulder 3 of working in coordination with steel sleeve, and the bottom is positive three lobe cylindricalitys.Steel sleeve 4 approximate circle tubulars, both ends open, be sleeved on the insulating ceramic 1 middle part outside and with insulating ceramic 1 sealing, its top is positive six square nut shapes, the bottom has the external screw thread 5 of working in coordination with engine cylinder cap, and the bottom has 3 along the other utmost point 6 of the equally distributed ground connection of cover end circumference.3 centre electrodes 7 are fixed on respectively in 3 through holes of insulating ceramic 1 central authorities, and the top of each centre electrode all has a wiring terminal 8, and stretch out outside the insulating ceramic 1 its bottom, respectively with the other the utmost point 6 corresponding and maintenance certain intervals of 3 ground connection.

With reference to the accompanying drawings 5,6,3 distributors mainly are made of switchboard and fire seperating core, fire seperating core 9 near cylindrical, make by insulating material, the top that is fixed on distributor shaft 10 also can be by distributor shaft 10 rotary driving, its end face is equipped with 3 concentric contact rings 11,3 outstanding discharge sheets 12 are equipped with at one side different heights place, each sheet that discharges links with 3 contact rings 11 respectively by the lead of pressure injection in fire seperating core, switchboard 13 approximate circle tubulars, make by insulating material, button covers on the fire seperating core 9, keeps certain interval between its inner top surface and fire seperating core end face, its top have 3 be used to connect high-voltage conducting wires also respectively with 3 contact rings of fire seperating core, 11 corresponding jacks 14, jack is embedded with conduction copper sheathing 15, and the contact screw 16 of working in coordination with copper sheathing 15 and being used to adjust jack and contact ring gap value is housed in the copper sheathing 15.Be evenly distributed with the high-voltage conducting wires socket 17 that number equates with the cylinder number around the switchboard top, 3 conducting sheet in socket 18 are equipped with at socket 17 inwall different heights places respectively, be equipped with 3 19,3 of electric sheets that hold of working in coordination with 3 of fire seperating cores discharge sheet respectively and hold electric sheet and link with 3 conducting sheet in socket 18 respectively by the lead of pressure injection in switchboard at the different heights place on the switchboard inwall under the socket 17.When 3 distributor fire seperating cores are rotated in switchboard by the distributor shaft driving, 3 groups of discharge sheets and hold electric sheet and link respectively, 3 high-tension currents that produce among 3 high-tension coil L1, L2, the L3 respectively through jack, contact ring, discharge sheet, hold electric sheet and socket flows into 3 centre electrodes in same 3 spark plugs and produce 3 high-voltage sparks simultaneously between the 3 pairs of centre electrodes and the other utmost point.

The electrical spark energy height of multiple-point synchronous igniter for gasoline engine of the present invention can improve the functional reliability of ignition mechanism greatly, and finally improves the output power of motor, reduces the consumption of fuel and reduces environmental pollution.Therefore, the present invention can be widely used as various petrolic ignition mechanisms.

Claims (4)

1, a kind of ignition device of gasoline engine comprises spark coil, distributor and spark plug; Spark coil comprises low voltage winding and high-tension coil, is wound in the former limit and the secondary of transformer respectively; Distributor is made of switchboard and fire seperating core, have the electric sheet that holds that equates with the cylinder number on the switchboard, fire seperating core have with switchboard hold discharge sheet that electric sheet works in coordination and can by distributor shaft drive in the switchboard inward turning then make the discharge sheet successively with respectively hold electric sheet and link; The number of spark plug equates with the cylinder number, be installed in that cylinder covers and corresponding with each cylinder, each spark plug all comprises the centre electrode and the other utmost point of ground connection that is used to produce high-voltage spark, when fire seperating core rotates in switchboard under distributor shaft drives, fire seperating core discharge sheet and switchboard hold electric sheet and link, and the high-tension current that produces in the high-tension coil flows into corresponding central electrode and produce high-voltage spark between the centre electrode and the other utmost point through fire seperating core and switchboard; The invention is characterized in described spark coil have more than two with around to, with the high-tension coil of the number of turn, described distributor is to have many groups of discharge sheets and the multiple spot distributors that hold electric sheet that the group number equates with the high-tension coil number, and described spark plug is to have many multi spot spark plugs to the centre electrode and the other utmost point that logarithm equates with the high-tension coil number; When in switchboard, rotating under the driving of multiple spot distributor fire seperating core at distributor shaft, organizing discharges sheets and hold electric sheet more links respectively, and the high-tension current that produces in each high-tension coil is organized to discharge sheet and hold electric sheet respectively and flowed into same each centre electrode of cylinder spark plug and produce a plurality of high-voltage sparks simultaneously between each is to the centre electrode and the other utmost point through each.

2, ignition device of gasoline engine according to claim 1, it is characterized in that described spark coil have 3 with around to, with the high-tension coil of the number of turn, described multiple spot distributor is 3 distributors that have 3 groups of discharge sheets and hold electric sheet, and described multi spot spark plug is 3 spark plugs that have the 3 pairs of centre electrodes and the other utmost point; When going out distributor shaft, 3 distributor fire seperating cores drive when in switchboard, rotating, 3 high-tension currents that produce in the 3 groups of discharge sheets and hold electric sheet and link respectively, 3 high-tension coils are respectively through 3 groups of discharge sheets with hold electric sheet and flow into 3 centre electrodes in 3 spark plugs of same cylinder and produce 3 high-voltage sparks simultaneously between the 3 pairs of centre electrodes and the other utmost point.

3, ignition device of gasoline engine according to claim 2 is characterized in that described 3 spark plugs are made of insulating ceramic, steel sleeve and 3 centre electrodes; Insulating ceramic is cylindrical, make by the insulation porcelain material, its central authorities have the through hole that 3 one-tenth " product " font distributes, the top has " Y " shape barricade and each through hole is separated, the middle part has the shoulder of working in coordination with steel sleeve, the bottom is positive three lobe cylindricalitys, steel sleeve approximate circle tubular, both ends open, be sleeved on outside the insulating ceramic middle part and and seal with insulating ceramic, its top is positive six square nut shapes, and the bottom has the external screw thread of working in coordination with engine cylinder cap, and the bottom has 3 along the other utmost point of the equally distributed ground connection of cover end circumference; 3 centre electrodes are fixed on respectively in 3 through holes of insulating ceramic central authorities, and the top of each centre electrode all has wiring terminal, and stretch out outside the insulating ceramic its bottom, other extremely corresponding with 3 ground connection respectively and maintenance certain interval.

4, ignition device of gasoline engine according to claim 2, it is characterized in that described 3 distributors are made of switchboard and fire seperating core, the fire seperating core near cylindrical, make by insulating material, the top that is fixed on distributor shaft also can be by the distributor shaft rotary driving, its end face is equipped with 3 concentric contact rings, and 3 outstanding discharge sheets are equipped with at a side different heights place, and each sheet that discharges links with 3 contact rings respectively by the lead of pressure injection in fire seperating core; Switchboard approximate circle tubular, make by insulating material, button covers on the fire seperating core, keep certain interval between its inner top surface and fire seperating core end face, its top have 3 be used to connect high-voltage conducting wires and respectively with 3 corresponding jacks of contact ring of fire seperating core, jack is embedded with the conduction copper sheathing, the contact screw of working in coordination with copper sheathing and being used to adjust jack and contact ring gap value is housed in the copper sheathing, be evenly distributed with the high-voltage conducting wires socket that number equates with the cylinder number around the switchboard top, socket inwall different heights place is equipped with 3 conducting sheet in socket respectively, be equipped with 3 respectively and hold electric sheet with fire seperating core discharge sheet is worked in coordination at the different heights place on the switchboard inwall under the socket, and 3 are held electric sheet and link with 3 conducting sheet in socket respectively by the lead of pressure injection in switchboard.

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