CN203214226U - Arrangement of spark plugs for an opposed-piston engine - Google Patents

Abstract

The utility model provides a spark plug arrangement mode of an opposed piston engine, two pistons are oppositely arranged by end faces in a cylinder, the two ends of the cylinder are connected with a crankcase, a crankshaft is arranged in the crankcase, the crankshaft is connected with the pistons through a connecting rod, the upper end of the middle part of the cylinder is provided with an opening, the lower end of the cylinder is provided with a hole, a cylinder cover is arranged above the opening, a combustion chamber is arranged at a gap enclosed by the cylinder cover and the end faces of the two pistons, a spark plug II is arranged in the cylinder cover, and a spark plug I is arranged in the lower end hole of the middle; the utility model discloses make things convenient for mass production engine parts and holistic reduction gear, make the screw propeller realize the rotational speed of ideal easily under biggest horsepower, simple structure, the good reliability, low in manufacturing cost, work efficiency is high.

Description

Arrangement of spark plugs for an opposed-piston engine

technical field

The utility model relates to an engine, in particular to a spark plug arrangement method of an opposed piston engine.

Background technique

According to the cylinder arrangement, the engine can generally be divided into in-line engine, V-arrangement engine, W-arrangement engine, opposed piston engine, and rotary engine. Among them, due to the horizontal arrangement of the piston, the opposed engine moves left and right in the horizontal direction, so that the overall height of the engine is reduced and the length is shortened. The balance of piston movement is good, the stability of the engine is enhanced, and the power loss during operation is small. Compared with other types of engines Advantages such as low fuel consumption are widely used in certain fields.

Gasoline engines generate power through the timely combustion of fuel and mixed gas, but gasoline as fuel is difficult to spontaneously ignite even in high temperature environments. To make it combust at the right time, it is necessary to ignite it with a spark plug. The overall performance of the engine is good or bad. A large part of it is determined by the quality of the spark from the spark plug.

At present, a general gasoline engine is provided with a spark plug installation hole on the cylinder head, and the spark plug is installed in the spark plug installation hole for single spark plug ignition. Due to long-term operation under high temperature and high pressure conditions, the spark plug is easily ablated, resulting in a decrease in the ignition performance of the spark plug. The engine will not work when the spark plug fails. In some application fields, for the sake of insurance, the engine is required to have two ignition systems, so that the engine can continue to run when one ignition system fails. For this reason, two spark plug installation holes are provided on the cylinder head, and two spark plug installation holes The spark plugs are installed separately, however, this method usually makes the manufacturing cost very high.

Utility model content

The utility model aims to provide a spark plug arrangement for an opposed piston engine, which is convenient for mass production of engine parts and overall reduction gears, and makes it easy for the propeller propeller to achieve an ideal speed under the maximum horsepower. Its structure is simple, The utility model has the advantages of good reliability, low manufacturing cost and high working efficiency.

The technical solution of the utility model is a spark plug arrangement of an opposed piston engine, which is characterized in that: two pistons are arranged opposite to each other in a cylinder, a crankcase is connected to both ends of the cylinder, and a crankshaft is arranged in the crankcase. The crankshaft and the piston are connected by a connecting rod. There is an opening at the upper end of the middle part of the cylinder and a hole at the lower end. There is a cylinder head above the opening. The gap between the cylinder head and the end faces of the two pistons is the combustion chamber. A spark plug is installed in the lower end hole of the middle part.

Preferably, the spark plug at the bottom end of the middle part of the cylinder is connected to the cylinder through threads.

Preferably, the cylinder head is provided with an exhaust port and an intake port connected to the combustion chamber, an exhaust valve is provided at the exhaust port, an intake valve is provided at the intake port, and a control intake valve is provided at the top of the cylinder head. Camshaft mechanism for valves and exhaust valves.

Preferably, a water jacket is provided in the outer shell of the cylinder.

Preferably, the crankcase includes a portion where the end of the cylinder expands outwards and a crankcase housing.

Preferably, the crankcase housing and the outwardly expanded part of the cylinder end are connected by bolts.

The utility model is convenient for large-scale production of engine parts and integral reduction gears, and makes the propeller propeller easy to realize an ideal rotating speed under the maximum horsepower, and has simple structure, good reliability, low manufacturing cost and high working efficiency. Specifically, the structure of the cylinder head itself is complex and the working environment is poor, so the requirements for the material itself and machining accuracy are high, resulting in high manufacturing costs. Adding a new structure for placing spark plugs on the cylinder head will inevitably increase design and manufacturing. The previous series of difficulties have greatly increased the manufacturing cost. Compared with the opposed piston engine with double spark plug structure on the cylinder head, the utility model can realize the same function on the basis of simplifying the structure of the cylinder head.

Description of drawings

Fig. 1 is a structural sectional view of the utility model;

In the figure: 1-crankcase, 2-crankshaft, 3-connecting rod, 4-piston, 5-spark plug I, 6-water jacket, 7-cylinder, 8-combustion chamber, 9-exhaust port, 10-exhaust Door, 11-intake port, 12-intake valve, 13-camshaft mechanism, 14-cylinder head, 15-crankcase housing, 16-spark plug II.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, the utility model discloses a spark plug arrangement for an opposed-piston engine. Two pistons 4 are arranged opposite to each other in a cylinder 7, and a crankcase 1 is connected to both ends of the cylinder 7. The crankcase 1 A crankshaft 2 is arranged inside, and the crankshaft 2 and the piston 4 are connected by a connecting rod 3. There is an opening at the upper end of the middle part of the cylinder 7, and a hole at the lower end. There is a cylinder head 14 on the opening, and the gap between the cylinder head 14 and the end faces of the two pistons 4 For the combustion chamber 8, a spark plug II16 is arranged in the cylinder head 14, and a spark plug I5 is installed in the lower end hole of the middle part of the cylinder 7.

Preferably, the spark plug 15 at the bottom end of the cylinder 7 is threadedly connected to the cylinder 7, which is convenient for disassembly on the basis of ensuring sealing.

Preferably, the exhaust port 9 and the intake port 11 connecting the combustion chamber 8 are arranged in the cylinder head 14, the exhaust port 9 is provided with an exhaust valve 10, the intake port 11 is provided with an intake valve 12, and the cylinder head 14 top is also provided with a camshaft mechanism 13 that controls the intake valve 12 and the exhaust valve 10.

Preferably, a water jacket 6 is arranged in the outer shell of the cylinder 7, and the water jacket 6 communicates with the water jacket in the cylinder head 14. During the working process of the engine, a large amount of heat will be generated in the cylinder 7 and the combustion chamber 8, which will be transferred by heat conduction. The heat energy is transferred to the coolant in the water jacket 6, and the heat is taken away by the flow of the coolant.

Preferably, the crankcase 1 includes the part where the end of the cylinder 7 expands outwards and the crankcase housing 15, so that the crankcase 1 is easy to disassemble, easy to install, debug and overhaul.

Preferably, the crankcase housing 15 and the outwardly expanded part of the end of the cylinder 7 are connected by bolts, and the bolt connection facilitates disassembly of the crankcase 1 on the basis of ensuring strength.

In the working process of the utility model, the output shaft of the crankshaft 2 is connected to the camshaft mechanism 13 through transmission mechanisms such as belts, gears, and chains. The valve 10 is closed, and the piston 4 moves outward from the middle of the cylinder 7 along the axial direction of the cylinder 7, so that a certain degree of vacuum is formed in the area formed by the cylinder 7 and the combustion chamber 8, and the mixture of air and gasoline enters the cylinder 7, and in the cylinder 7 7 is further mixed into a combustible mixture; during the compression stroke, the camshaft mechanism 13 controls the closing of the intake valve 12 and the exhaust valve 10, and the piston 4 moves inward from the outside of the cylinder 7 along the axial direction of the cylinder 7, so that the mixture of air and gasoline The gas is compressed; during the power stroke, the camshaft mechanism 13 controls the intake valve 12 and the exhaust valve 10 to close, and at the same time, the mixture is ignited by the spark plug I5 and the spark plug II16, and the combustion of the mixture releases a large amount of heat, making the temperature in the cylinder And the pressure rises rapidly, pushes the piston 4 to move outward from the middle of the cylinder 7 along the axis of the cylinder 7, and then makes the crankshaft 2 rotate; during the exhaust process, the camshaft mechanism 13 controls the intake valve 12 to close, and the exhaust valve 10 to open. The piston 4 moves inward from the outside of the cylinder 7 along the axial direction of the cylinder 7. On the one hand, the exhaust gas after combustion is discharged out of the cylinder under the pressure difference between the inside and outside of the cylinder 7, and on the other hand, it is exhausted out of the cylinder through the displacement of the piston 4. So enter the next cycle.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (6)

1. the spark plug arrangement of an opposed piston engine, it is characterized in that: at interior two pistons of a cylinder (7) (4) with the end face positioned opposite, cylinder (7) two ends are connected with crankcase (1), be provided with bent axle (2) in the crankcase (1), be connected by connecting rod (3) between bent axle (2) and the piston (4), there is opening upper end, cylinder (7) middle part, the lower end is porose, cylinder head (14) is arranged above the opening, cylinder head (14) is firing chamber (8) with the gap that two-piston (4) end face surrounds, be provided with a spark plug II(16 in the cylinder head (14)), cylinder (7) middle part is equipped with a spark plug I(5 in the stomidium down).

2. the spark plug arrangement of a kind of opposed piston engine according to claim 1 is characterized in that: the spark plug I(5 of bottom, described cylinder (7) middle part) with cylinder (7) between by being threaded.

3. the spark plug arrangement of a kind of opposed piston engine according to claim 1, it is characterized in that: be provided with the relief opening (9) and the suction port (11) that connect firing chamber (8) in the described cylinder head (14), relief opening (9) locates to be provided with exhaust valve (10), suction port (11) locates to be provided with intake valve (12), and cylinder head (14) top also is provided with the camshaft mechanism (13) of control intake valve (12) and exhaust valve (10).

4. the spark plug arrangement of a kind of opposed piston engine according to claim 1 is characterized in that: be provided with water jacket (6) in the housing of described cylinder (7) outside.

5. the spark plug arrangement of a kind of opposed piston engine according to claim 1, it is characterized in that: described crankcase (1) comprises part and the crankcase housing (15) that cylinder (7) end is expanded outward.

6. the spark plug arrangement of a kind of opposed piston engine according to claim 5, it is characterized in that: described crankcase housing (15) is connected by bolt with the part that cylinder (7) end is expanded outward.

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