CN1971027A

CN1971027A - Spark plug with pre combustion chamber

Info

Publication number: CN1971027A
Application number: CN 200510101578
Authority: CN
Inventors: 侯卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-23
Filing date: 2005-11-23
Publication date: 2007-05-30

Abstract

The invention discloses a spark plug with pre-combustion chamber, applied in various ignition engines. the characteristic of spark plug is that there is a pre-combustion chamber in the shell of spark plug; the core of spark plug and the inner wall of pre-combustion chamber are formed a pair of electrode; when working, electrode arcing discharge ignites the mixed air in the pre-combustion chamber. The flame of firing mixed air jets to combustion chamber through nozzle and ignites the mixed air in combustion chamber to do work. Because the flame generated in pre-combustion chamber spreads to the combustion chamber, the invention is provided with big area for flame spreading and enough burning so on. Because the pre-combustion chamber is set in the spark plug there is no need to change original engine.

Description

The spark plug of band precombustion chamber

Technical field

The present invention relates to the spark plug that a kind of motor igniting device particularly relates to spark ignition engine.

Background technique

Known spark plug is made up of spark-plug body, spark plug core and insulated porcelain sleeve.Spark-plug body connects the power supply bonding, and spark plug core and spark coil Shuo high-voltage output power supply join.During work, sternly give birth to the electrode gap arcing discharge of high-tension current between spark plug core and spark-plug body by straight fire coil.Light mixed gas and work done.Because the discharge of known spark plug sparking is moment (a microsecond level), carry out at spark clearance, the flame that arcing is lighted is to begin near the electrode gap of spark plug.Glomeration is outwards expanded one by one and is lighted mixed gas in the whole firing chamber, this ignition way exists following short of electricity: 1, carry out between spark clearance owing to arcing, when spark clearance is too small, in the power stroke, because electrical spark and mixed gas surface of contact are little, the spark arcing time is short, is difficult to light mixed gas.Be sort this problem out, need widen the gap of sparking-plug electrode, spark and mixed gas surface of contact are increased, and, can continue the long arcing time, but widen spark clearance, just need higher secondary voltage along with drawing of spark clearance is normal.Because in compression stroke, high pressure makes the ionization of mixed gas numberator height, and electrode can not be discharged in arcing, even also make the waste gas of discharge not have perfect combustion and befouling environment with 1/100 frequency appearance interruption arcing.2, because the flame of lighting is that glomeration is outwards expanded propagation near the spark plug electricity is picked up the news crack, and it is slow to exist velocity of combustion, the mixed gas in the zone far away apart from spark plug can not fully burn.

Existing transistor ignition, laser ignition technology are to the improvement of ignition mechanism in accuracy and the persistency of current/voltage and firing time, have solved above-mentioned existing problems 1 substantially; But, can not solve above-mentioned existing problems 2 because of not relating to spark plug technology.

Once a kind of motor with precombustion chamber occurred at the fifties, principle is that the top of combustion chamber at engine cylinder cap has a precombustion chamber, and the top of precombustion chamber has refilled spark plug.During work, discharge by spark plug sparking.Light the mixed gas in the precombustion chamber, jet out flames the mixed gas work done that ignition combustion is indoor again through spout to the firing chamber.This device has overcome above-mentioned existing problems 2.Be that flame is not that the glomeration expansion is propagated in cylinder, expand propagation and the rapid indoor mixed gas of ignition combustion but go out into cone shape to the firing chamber from the direct injection of precombustion chamber spout, have characteristics such as velocity of combustion is fast, sufficient combustion, thereby reach the purpose of the oily section of tangible saving.But the shape of cylinder head complexity of this motor, manufacture process requirement height, the corresponding cost up of bringing; Again and maintenance difficulty, thus do not applied.

Summary of the invention

The objective of the invention is: disclose a kind of improved, spark plug that can the direct injection ignition flame, solve the problem that spark plug direct ignition exists.

Invention is achieved in that spark-plug body inside is made into the cavity of a precombustion chamber; Precombustion chamber has spout and is interlinked to the outside; Form pair of electrodes between spark plug core and the precombustion chamber inwall.During work, the mixed gas flame in the precombustion chamber that electrode gap arcing discharge is lighted is spouting through spout, and then the mixed gas in some gas cylinder and the firing chamber.

The present invention has been owing to adopted combustion burn-off chamber device, thereby overcome the shortcoming of known spark plug; Because precombustion chamber is in spark-plug body, spark plug and precombustion plug are one, have overcome to make the complex-shaped of precombustion chamber on cylinder head, create the technological requirement height, shortcomings such as maintenance difficulty; Owing to be that electrode arcing discharge is lighted the form of interior mixed gas of precombustion chamber and then injection earlier to cylinder and firing chamber propagating flame, so the secondary voltage in when igniting, spark intensity, spark are not had specific (special) requirements continuous time, even than the lower secondary voltage of common motor, spark intensity and short spark also can successfully be lighted continuous time, and do not influence the efficient of motor, the combustion efficiency of mixed gas.For engine cold starting, battery voltage is low can sternly not give birth to influence.The present invention can be widely used in automobile, motorcycle, motor and other known engine spark plug device, generally need not change the electric device (except that spark plug) of cylinder head and igniting.

Embodiment

Fig. 1 is the view that proposes according to the present invention.The central axis left side is a front view, and central axis the right is a sectional view.

Fig. 2 is the partial view that the spark plug spout of the proposition according to the present invention distributes along the warp-wise line.The central axis left side is the part front view, and central axis the right is a phantom.

Fig. 3 is the spark plug spout schematic representation when the injection of central axis that proposes according to the present invention.

Fig. 4 is the schematic representation of spark plug spout when the injection that distributes along the warp-wise line of quoting according to the present invention.

With reference to Fig. 1, what the present invention proposed is that spark plug is made up of spark-plug body (1), spark plug core (2), insulated porcelain sleeve (3).Spark plug core (2) terminal have connection plug (7), and spark-plug body (1) screws in sealed department with engine cylinder cap seal ring (4), and different with well known device is: (1) spark-plug body is made a cavity and made precombustion chamber (5); (2) gap of the inwall of spark plug core firing tip (9) and spark-plug body-be precombustion locular wall (8) forms a pair of electroplax (8), (9).The firing tip of spark plug core can be made into elbow, makes it to become certain interval with chamber wall; When (3) precombustion chamber (5) is by spout (6) and firing chamber and cylinder activation (firing chamber and cylinder draw among Fig. 1), air-breathing compression stroke, mixed gas enters precombustion chamber (5) in the spark plug through spout (6), compression stroke finally, when power stroke begins, electrode (8), (9) gap electrical spark that flies out, light the mixed gas in the precombustion chamber (5), by the mixed gas lighted precombustion chamber (5) internal combustion, splash bloated, spray through spout (6), become the flame directive firing chamber cylinder of cone shape, rapidly the mixed gas (referring to Fig. 4) in ignition combustion chamber, the cylinder

With reference to Fig. 2, this is the partial view that several spouts distribute along the warp-wise line, and spout (6) is to be made into (being 3 among the figure) that several radially distribute.The screw-in portion that the flower of living is like this filled in can do longer, make spout (6) in the centre of firing chamber and cylinder up stroke (referring to Fig. 4), preferably 55 °～90 ° at the tilt angle of spout (6), make through flame that spout ejects can be directly to around arrive between firing chamber and the cylinder up stroke each than the territory, far field, and light each regional mixed gas rapidly, to reach best effect (referring to Fig. 4).

Claims

1, the spark plug of a kind of igniting device of motor, particularly spark ignition engine is made up of spark-plug body (1), spark plug core (2), insulated porcelain sleeve (3).It is characterized in that: a precombustion chamber (5) is arranged in the spark-plug body (1); The igniting electroplax (8) of spark plug, (9) are in precombustion chamber; Precombustion chamber (5) through spout (6) be interlinked to the outside.

2, device according to claim 1 is characterized in that: precombustion chamber (5) is an one with spark-plug body (1).

3, according to claim 1,2 described devices, it is characterized in that: the firing tip (9) of spark plug core (2) is made into elbow, makes it to become electrode gap with precombustion locular wall (8).

4, require 1,2 described devices according to power is surplus, it is characterized in that: spout (6) is identical with precombustion chamber (5) along central axis.

5, according to claim 1,2 described devices, it is characterized in that: several spouts (6) communicate with precombustion chamber (5) along the warp-wise line.

6, according to claim 1,2,5 described devices, it is characterized in that: spout (6) becomes 55 °～90 ° at tilt angle.