CN201221401Y

CN201221401Y - Single-cylinder double-spark plug engine

Info

Publication number: CN201221401Y
Application number: CNU2008200754278U
Authority: CN
Inventors: 张宝欢; 唐琦; 包铁成
Original assignee: TIANJIN INTERNAL-COMBUSTION ENGINE INST
Current assignee: TIANJIN INTERNAL-COMBUSTION ENGINE INST
Priority date: 2008-07-23
Filing date: 2008-07-23
Publication date: 2009-04-15
Anticipated expiration: 2018-07-23

Abstract

The utility model discloses a single-cylinder dual-spark plug engine. In the technical proposal, the engine comprises a cylinder body; a flat-headed piston is arranged in the cylinder body; a cylinder cover is positioned at the upper end of the cylinder body; two spark plugs of the identical model are arranged on the cylinder cover and are connected with an ignition system; the ignition system consists of two integrated inductive energy storage electronic ignition devices and supporting magnetogenerator flywheels; the two integrated inductive energy storage electronic ignition devices are formed by the secondary high pressure wires of two ignition coils which are respectively connected with two spark plugs; and two built-in magnets corresponding to the two ignition coils are arranged on the magnetogenerator flywheels. The utility model has the advantages of simultaneously igniting the two sparks, shortening the flame propagation distance, reducing the burning time in the cylinder, greatly speeding up the flame propagation speed, reducing the chance of the quenching phenomenon on the cylinder wall, and decreasing the energy loss and HC emissions.

Description

Single cylinder dual ignition plug motor

Technical field

The utility model relates to a kind of motor, and in particular, the utility model relates to a kind of single-cylinder engine.

Background technique

Existing petrol engine is because a spark plug only is equipped with in its cylinder head firing chamber, so exist deficiencies such as igniting outburst speed is slow, explosive force is inhomogeneous, oil consumption is high, exhaust pollution is serious when igniting.Advantages such as existing elbow-type combustion chamber motor is highly low, simple in structure owing to having, low cost of manufacture obtained priority application on small machine, but it are in use removed the above deficiency of existence, also have following defective:

(1) because it adopts flat head piston, the single spark plug combustion system of biasing, and flame travel is far away, the in-cylinder combustion time is long;

(2) because combustion chamber surface to volume ratio is big, and mixture combustion speed is slow, it is more to cause casing wall the chance of quenching to occur;

(3) combustion efficiency owing to mixed gas in the firing chamber is low, causes energy loss bigger, and the HC discharging is higher, has directly influenced the performance of motor.

The model utility content

Problem to be solved in the utility model, overcome the above defective that existing elbow-type combustion chamber motor exists exactly, provide a kind of and can shorten flame travel, reduce the HC discharging, improve combustion performance, improve the thermal efficiency and also avoid casing wall the single cylinder dual ignition plug motor of quenching chance to occur.

Single cylinder dual ignition plug motor of the present utility model comprises cylinder block, is provided with flat head piston in the described cylinder block, and the upper end of described cylinder block is provided with cylinder head, and described cylinder head is provided with two spark plugs of tie point ignition system.

Described two spark plugs are the same model spark plug.

Described ignition system is made of two integrated inductive energy storage ignitions and the magnetogenerator flywheel that matches with it, described two integrated inductive energy storage ignitions connect two described spark plugs respectively by the secondary high pressure line of two spark coils and constitute corresponding two magnet of built-in and described two spark coils on the described magnetogenerator flywheel.

The utility model compared with prior art has following beneficial effect:

(1) owing to adopt dual ignition plug to light a fire simultaneously, shortened flame travel, reduced the in-cylinder combustion time, thereby accelerated propagation of flame speed significantly;

(2) owing to shortened period of combustion, make that mixed gas burns rapidly in the cylinder, reduced the chance that the quenching phenomenon appears in casing wall;

(3) because the dual ignition plug high-energy ignition has improved the probability that catches fire, mixture combustion speed is fast, has reduced energy loss, has reduced the HC discharging.

Description of drawings

Fig. 1 is the structural representation of air cylinder of prior art elbow-type combustion chamber motor;

Fig. 2 is along the sectional view of A-A direction among Fig. 1;

Fig. 3 is the structural representation of air cylinder of the utility model elbow-type combustion chamber motor;

Fig. 4 is along the sectional view of A-A direction among Fig. 3;

Fig. 5 is the schematic representation of ignition system in the utility model;

Fig. 6 is along D-D directional profile figure among Fig. 5.

Among the figure: 1. cylinder block 2. valves 3. cylinder head 4. spark plugs 5. pistons 6. spark coils

7. magnetogenerator flywheel 8. magnet

Embodiment

Below in conjunction with drawings and Examples the utility model is done to describe in detail.

Fig. 1, Fig. 2 show the formation situation of prior art elbow-type combustion chamber motor.As seen from the figure, this motor comprises cylinder block 1, is provided with flat head piston 5 in the described cylinder block 1, and the upper end of described cylinder block 1 is provided with cylinder head 3, the spark plug 4 of a tie point ignition system of described cylinder head 3 upper offsets.

When engine running, valve 2 is opened, and oil and Air mixing gas enter in the firing chamber, and then flat head piston 5 moves upward and compressed mixed gas, and when described flat head piston 5 arrival top dead centers, mixed gas is lighted in the blast of catching fire of described spark plug 4.

Because this motor only is provided with 4 igniting of a spark plug, and oil and Air mixing gas all are uneven on room and time in the firing chamber, so the probability of success of engine ignition is not high, the velocity of combustion of mixed gas is slow, the distance of flame propagation is longer, strengthened the chance that quenching appears in casing wall.

Fig. 3, Fig. 4 show the embodiment that the utility model elbow-type combustion chamber motor constitutes situation.As seen from the figure, the same cylinder block 1 that is provided with of motor among this embodiment with the motor of aforementioned prior art, also be provided with flat head piston 5 in the described

cylinder block

1,3 of cylinder head that described cylinder block 1 upper end is provided with are distinguished to some extent with the cylinder head 3 of prior art: the shape of the described cylinder head 3 of the first is different, and it two is spark plugs 4 that described cylinder head 3 is provided with two tie point ignition systems.

In order to realize more stable burning, described two spark plugs 4 adopt the spark plug of same model.

When engine running, valve 2 is opened, and oil and Air mixing gas enter in the firing chamber, and then flat head piston 5 moves upward and compressed mixed gas, when described flat head piston 5 arrives top dead centers, catch fire the simultaneously blast and light mixed gas of described two spark plugs 4.Because this motor is provided with two spark plugs 4 of igniting simultaneously, so the probability of success of engine ignition is doubled.This high-energy ignition mode also is favourable for lean-combustion engine.

Dual ignition plug setting of the present utility model, pressurized air in the cylinder block is burnt rapidly, and flame travel and period of combustion have significantly been shortened, not only reduced the chance that quenching appears in casing wall, and increased substantially energy utilization ratio, thus reduced discharging, saved the energy, compare with the motor of routine, oil consumption can reduce more than 10%.

Fig. 5, Fig. 6 are the ignition systems in the utility model, this ignition system is made of two integrated inductive energy storage ignitions and the magnetogenerator flywheel 7 that matches thereof, described integrated inductive energy storage ignition connects two spark plugs 4 respectively by the secondary high pressure line of two spark coils 6 and constitutes, built-in and two described spark coil 6 corresponding two magnet 8 on the described magnetogenerator flywheel 7.

When the cut-in point ignition system, low-tension current is by the primary air of spark coil 6, and its surrounding magnetic field is subjected to the magnetic force of magnet 8 in the described magnetogenerator flywheel 7 and strengthens; When cutting off elementary low-voltage circuit, the magnetic flux of described magnet 8 disappears, and induces high voltage simultaneously in the secondary winding of spark coil 6, makes described spark plug 4 produce electrical spark.

The utility model has been broken through the restriction that traditional elbow-type combustion chamber motor has only a spark plug, and its advantage applies is in following several respects:

(1) according to the principle of Conversion of energy, the mixed gas in the firing chamber is lighted a fire during to top dead center in Piston Compression, and the moment burning is clean, and heat utilization ratio at this moment is the highest.After adopting dual ignition, two spark plugs mixed gas that can make knocking fuel of lighting a fire simultaneously forms stronger eddy current rapidly, accelerated propagation of flame speed significantly, shorten flame travel 1/2 simultaneously, make the used also corresponding shortening of time of burning, thereby increased substantially heat utilization ratio.

(2) owing to shorten period of combustion, the igniting of Maximum Torque improves the angle can significantly be postponed, and therefore, when igniting, the temperature and pressure of mixed gas is all higher in the firing chamber, helps catching fire and quick burning.

(3) general, oil and Air mixing gas all are uneven on room and time in the firing chamber, so have the probability problem that catches fire of spark ignition, and the probability that catches fire that two spark plugs are lighted a fire simultaneously than a plug ignition will double.The dual ignition plug setting of this high-energy ignition is concerning especially showing its benefit with lean-combustion engine.

(4) help catching fire and quick burning owing to dual ignition, so, to compare with the existing conventional motor, its oil consumption and HC discharging all can reduce significantly, and can realize smooth combustion.

Below schematically the utility model and mode of execution thereof are described, this description does not have restricted, and shown in the accompanying drawing also is a kind of mode of execution of the present utility model.If those of ordinary skill in the art is enlightened by it, under the situation that does not break away from the utility model creation aim, design and the same or analogous structure of this technological scheme without creationary, all should belong to protection domain of the present utility model.

Claims

1. a single cylinder dual ignition plug motor comprises cylinder block, is provided with flat head piston in the described cylinder block, and the upper end of described cylinder block is provided with cylinder head, it is characterized in that, described cylinder head is provided with two spark plugs of tie point ignition system.

2. single cylinder dual ignition plug motor according to claim 1 is characterized in that, described two spark plugs are the same model spark plug.

3. single cylinder dual ignition plug motor according to claim 1, it is characterized in that, described ignition system is made of two integrated inductive energy storage ignitions and the magnetogenerator flywheel that matches with it, described two integrated inductive energy storage ignitions constitute corresponding two magnet of built-in and described two spark coils on the described magnetogenerator flywheel by two described spark plugs of secondary high pressure line connection of two spark coils.