CN1039876A

CN1039876A - The group light method of petrol engine and device thereof

Info

Publication number: CN1039876A
Application number: CN 88104712
Authority: CN
Inventors: 汪世文
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-07-26
Filing date: 1988-07-26
Publication date: 1990-02-21

Abstract

A kind of ignition method of improved petrol engine is divided into some groups with elementary deenergizing switch of ignition timing position transducer, spark coil and spark coil in cylinder and the ignition system, every group of igniting of only being responsible for this group cylinder.Used positive position sensor can be a mechanical cam, also can be various non contact pick ups; Used deenergizing switch can be a contact breaker points, also can be the various ignitions that the contact is arranged; Used spark coil can be separate, also can be to have a plurality of elementary winding identical with packet count and a common high voltage winding.Packet count must the aliquot cylinder number.

Description

The group light method of petrol engine and device thereof

A kind of improved petrolic ignition method and ignition mechanism thereof.

The present invention relates to the configuration of distributor and circuit breaker in the internal-combustion engine spark ignition.

The history of existing over half a century of traditional petrolic electric ignition system, technical comparative maturity, have circuit simply, for ease of maintenaince with advantages such as cost is low.But, development along with engine technology, particularly the Hyundai Motor petrol engine to multi-cylinder, at a high speed, the development of high compression ratio and employing weak mixture, the closing time of contact breaker points shortens, cylinder pressure increases, and the increasing of the gap of sparking-plug electrode, make spark coil in whole speed range of motor, all to have enough energy between sparking-plug electrode, to produce spark, become more and more difficult.For this reason, developed both at home and abroad and adopted various electronic ignitin systems, as the electronic ignition of inductive discharge formula, capacitor discharge type electronic ignition (referring to " automobile and tractor electrical equipment and electronic equipment ", Xian Institute of Highway is compiled, People's Transportation Press's 1985.6 front pages).The ignition energy of this electron-like ignition system, though tangible increase is arranged than conventional igniton system, but when engine speed is higher, spark coil primary current Ip and the ratio of its amplitude U/R(battery tension with the elementary all-in resistance of spark coil) differ greatly, still can not solve at a high speed the problem of reliable ignition down at all.

Task of the present invention provides and a kind ofly can significantly improve ignition energy, thereby can guarantee the present and following the motor improved ignition method and the device of reliable ignition under various conditions.

The principle of institute of the present invention foundation is as follows: the magnetic field energy that stores in the spark coil, depend primarily on the size of primary current Ip, and according to aforementioned documents:

Ip＝U/R（1-e ^-RTb/L）

In the formula, L is the elementary inductance of spark coil, and tb is the closing time of circuit breaker in a light-off period.Obviously, increase tb, Ip can rise by index law, and its maximum amplitude is U/R.In traditional single group ignition system of being made up of an ignition timing sensor (distributor cam), an elementary deenergizing switch of spark coil (contact breaker points) and coil, closing time tb and cylinder number and engine speed are inversely proportional to.If will increase tb, cylinder can be divided into some groups of n, and make every group have independently the ignition timing position transducer (1-1,1-2 ... 1-n), deenergizing switch (2-1,2-2 ..., 2-n) and the elementary winding of spark coil (3-1,3-2 ... 3-n), every group of igniting of only bearing this group cylinder, be about to single group igniting and change many group igniting into, this is the present invention-group light method.Because distributor is whenever goed around, the cylinder number of every group of igniting only is the l/n of conventional igniton system, thereby the closing time of contact breaker points is n times of conventional igniton system.

Below in conjunction with accompanying drawing, concrete device of the present invention is illustrated.

Fig. 1 is the block diagram of explanation group light method principle.

Fig. 2 is the embodiment who is used for six cylinder engine and is divided into two groups mechanical type contact ignition system.

Fig. 3 be embodiment illustrated in fig. 2 in the planimetric map of two groups of ignition timing position transducers and deenergizing switch relative position.

Fig. 4 and Fig. 5 are used for six cylinder engine and are divided into the embodiment that two groups electronic type has contact and electronic type contactless ignition system.

As seen from Figure 1, the device that group light method comprised, except that the ignition timing position transducer 1 that respectively is divided into the n group, the first line deenergizing switch 2 of spark coil and spark coil 3, also comprise high-voltage output line 4, distributor 5 and spark plug 6, and the ignition location sensor in every group, elementary deenergizing switch of its corresponding spark coil and spark coil are respectively arranged, be that 1-1 is corresponding with 2-1,3-1,1-2 is corresponding with 2-2,3-2 ..., 1-n is corresponding with 2-n, 3-n.Here, the numerical value of packet count n should be able to be divided exactly cylinder number, and when packet count equaled cylinder number, the high-voltage output line of each spark coil can directly be connected to each cylinder spark plug, and needn't use distributor 5.

Fig. 2 and embodiment illustrated in fig. 3 in, two groups of ignition timing position transducer 1-1 are two triangle mechanical cams that shape is identical with 1-2, they are coaxial with distributor, and perpendicular to the projection on the plane of distributor shaft, angle is 60 ° at space delamination setting and per two cam end portions.Deenergizing switch 2-1 is the contact breaker points identical with conventional igniton system with 2-2, and two contacts overlap on projected planform.Coaxial and the respectively corresponding cam side arm separately of the movable arm of two contacts is installed, mutually insulated, simultaneously respectively with capacitor C ₁, C ₂In parallel and with the elementary winding W of spark coil separately ₁, W ₂Link.Spark coil 3 is the handtailor coils with a common high voltage winding, and it is elementary W ₁, W ₂Two windings adopt two-wire and around, equal turn numbers, primary and secondary turn ratio can be selected by the conventional point fire coil.Because primary current increases and high pressure improves, can suitably strengthen elementary winding conducting wire footpath, and improve insulation and radiating condition.Certainly, also can adopt two independently spark coils.The centrifugal advance mechanism of distributor 5, spark plug 6 and distributor, vacuum advance mechanism etc. are identical with conventional igniton system.

Obviously, Fig. 3 is that three ends of its cam 1-1 are ignition timing positions of 1,2,6 cylinders by the design of the ignition order of 1-3-2-5-6-4, and three ends of cam 1-2 are ignition timing positions of 3,5,4 cylinders.When distributor shaft 7 with engine rotation, when timing cam 1-1 and 1-2 did not push up the insulation jacking block 8-1 of each self-corresponding deenergizing switch 2-1 and 2-2 and 8-2 as yet, deenergizing switch was all closed, the elementary winding W of spark coil ₁, W ₂The energy storage of all switching on.Distributor shaft 7 continues rotation, and the end 3 of timing cam 1-2 is jack-up insulation jacking block 8-2 at first, its movable contact arm 9-2 action, and deenergizing switch 2-2 disconnects, and cuts off W ₂Electric current, on spark coil, produce high pressure because distributor 5 is coaxial and connect the spark plug of the 3rd cylinder just with distributor, so the igniting of the 3rd cylinder, deenergizing switch 2-1 this moment closure still.Axle 7 continues rotation, and deenergizing switch 2-2 is closed again, W ₂The energy storage of switching on again.When turning over 60 ° with respect to the 3rd cylinder timing position, the end 2 jack-up insulation jacking block 8-1 of timing cam 1-1, deenergizing switch 2-1 disconnects, W ₁Outage, the igniting of the 2nd cylinder.Change 60 ° again, the igniting of the 5th cylinder ... so alternating movement in distributor rotates a circle, is finished the igniting task of each cylinder by predetermined sequence.

Electronic type shown in Figure 4 has contacts grouped ignition system embodiment, the difference of itself and above-mentioned mechanical type ignition system only is, deenergizing switch 2 is ignition 10(10-1,10-2 that the contact is arranged) replaced, former contact breaker points here only uses as the control signal of ignition, and the electric current that flows through the contact is very little, can not ablate, the deenergizing switch on the real former limit of spark coil, contactless electronic beam switch by ignition inside replaces, so quick action, and performance also increases.

Electronic type shown in Figure 5 is contactless, and its ignition timing position transducer 1 of grouping ignition system embodiment selects for use is magnetic impulser, also can select photoelectric sensor, Hall transducer or other non contact pick up for use, other parts have the contacts grouped igniting identical with electronic type.Owing to adopt the all-electronin mode, do not have the machinery wearing and tearing, thereby the movement speed of the contactless grouping ignition system of electronic type is faster, performance is better, can be used as most preferred embodiment of the present invention.

Outstanding effect of the present invention is to significantly improve the spark energy of ignition system when high speed, thus can satisfy the modern gasoline engine to multi-cylinder, at a high speed, the needs of high compression ratio and employing lean mixture future development. Table 1 is when six cylinder engine is adopted the tradition igniting and divides two groups of sparking mode, the calculated results of ignition coil primary current and spark energy. In the calculating, supply voltage U gets 12 volts, and the elementary resistance R of ignition coil is got 1.5 ohm, and inductance L is got 10 milihenries, and the gearratio of engine and ignition distributor was got 2: 1, and the closing of contact coefficient of tradition igniting gets 0.65, and the closing of contact coefficient of grouping igniting gets 0.9.

Table 1

Engine speed (r/min)		1000	3000	6000
					Primary current (A)	Grouping igniting Ip branch	8	6.68	4.74
Tradition igniting Ip passes	6.86	3.82	2.22
				Ip branch/Ip passes		1.17	1.75	2.14
Spark energy (mj)	Grouping igniting W branch	320	223						112.3
				Tradition igniting W passes	235	72.9	24.6
	W branch/W passes	1.36	3.06					4.57

As seen, engine speed is more high, and the superiority of group light method is more remarkable.

Claims

1, a kind of ignition method of petrol engine and device, employing is by the ignition timing position transducer, the elementary deenergizing switch of spark coil, spark coil, the spark coil high-voltage output line, the ignition system that distributor and spark plug are formed, it is characterized in that, ignition timing position transducer 1 in the described ignition system, elementary deenergizing switch 2 of spark coil and spark coil 3 are divided into n independently fire group, n is the positive integer of the described gasoline engine cylinder number of aliquot, every group of igniting of only being responsible for also being divided into n the corresponding cylinder block of organizing, each organizes ignition timing position transducer 1-1,1-2, the coaxial rotation of 1-n, and the ignition order layout of pressing described petrol engine.

2, ignition method according to claim 1 and device, it is characterized in that, wherein said each timing position transducer 1-1,1-2 ..., 1-n is the coaxial mechanical cam that is provided with at space delamination of some and distributor shaft, each cam end portion intermeshes circumferentially uniform, end quantity sum equals cylinder number, and the elementary deenergizing switch 2 of wherein said spark coil then is n the contact breaker points identical with conventional igniton system.

3, ignition method according to claim 2 and device is characterized in that, the elementary disconnection of wherein said spark coil close 2 be n ignition 10-1, the 10-2 that the contact arranged ... keep wherein said each contact breaker points simultaneously.

4, ignition method according to claim 1 and device, it is characterized in that, wherein said ignition timing position transducer 1 is a n magnetic impulser, and ignition 10-1, the 10-2 of the elementary deenergizing switch 2 of described spark coil to be n have contact ..., 10-n.

According to claim 2,3 or 4 described grouping ignition method and devices, it is characterized in that 5, wherein said spark coil 3 is structures of a kind of n of having an elementary winding, a common high voltage winding.

6, ignition method according to claim 1 and device is characterized in that, wherein said packet count n equals cylinder number, adopt n independently spark coil, and the high-voltage output line of each coil is connected to the spark plug of each cylinder respectively.