Collocation mechanism for injection cylinder end in cylinder

Abstract

An in-cylinder injection cylinder end configuring mechanism is arranged on a cylinder of an injection engine of a motor. A piston is arranged in the cylinder, one side of the cylinder is connected with a chain chamber, and the in-cylinder injection configuring mechanism of the injection engine motor comprises a cylinder end, and a high pressure nozzle unit and a spark plug unit which are connected with the cylinder head with space between each other. The invention is arranged on the cylinder end in a way of penetrating the spark plug unit through the chain chamber to make full use of the space on the cylinder end and expand the distance from the high pressure nozzle unit so that the fuel injected into the cylinder end by the high pressure nozzle unit has more time and space to mix with the air before being sparked by the spark plug unit, thereby promoting the fuel atomization and more complete burning thereof.

Description

technical field [0001] The present invention relates to a cylinder head arrangement mechanism, in particular to an in-cylinder injection cylinder head arrangement mechanism. Background technique [0002] Such as figure 1 As shown, the known in-cylinder injection cylinder head configuration mechanism used for motorcycle injection engines is to install a high-pressure nozzle 11 and a spark plug 12 on the relative top of a cylinder head 13 at intervals, and make the two extend Into a combustion chamber 14 formed between the cylinder head 13 and a cylinder 16, the cylinder head 13 has an intake port and an exhaust port (not shown in the figure) spaced apart for introducing air And discharged in the combustion chamber 14. A piston 15 capable of reciprocating movement is disposed inside the cylinder 16 , and it should be noted that a flow guide groove 151 for flow guide is formed on the top surface of the piston 15 . [0003] Since the configuration of the high-pressure nozzle ...

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Problems solved by technology

[0003] Since the configuration of the high-pressure nozzle 11 belongs to the "in-cylinder direct injection" type of fuel injection configuration, and the distance between the spark plug 12 and the high-pressure nozzle 11 is not large, when the high-pressure nozzle 11 will When fuel is injected into the combustion chamber 14, the fuel is likely to be completely mixed (poor atomization) with the air that is input into the combustion chamber 14 through the intake port (not shown). The spark plug 12 is ignited, and then incomplete combustion occurs in the combustion chamber 14

The phenomenon of incomplete combustion will not only cause substantial performance problems such as reduced engine output efficiency and high fuel consumption, but also produce high-pollution emissions. Today, with the rising awareness of environmental protection and energy conservation, it is a very serious problem.

[0004] In order to solve the above-mentioned problems, the general practice is to set a guide groove 151 on the top surface of the piston 15. When the piston 15 contacts the injected fuel, the direction of the injected fuel will change accordingly and form a The swirl-like flow direction makes the injected fuel to be more completely mixed with the input air before being ignited by the spark plug 12, but when the engine is running, the combustion chamber 14 is in a state of high temperature and high pressure, The top surface of the piston 15 is structurally irregular due to the relationship of the guide groove 151, and the irregular pattern is relatively poor in structural strength. Therefore, the top surface of the piston 15 , especially the part of the diversion groove 151 is likely to be damaged due to the long-term high pressure and high temperature environment, thereby reducing the service life of the piston 15. Moreover, the piston 15 with the diversion groove 151 is more complicated in structure , it is also relatively difficult in manufacturing and increases the manufacturing cost of the piston 15

[0005] In addition, it should be noted that the spark plug 12 is directly screwed on the cylinder head 13, due to the structure of the spark plug 12 itself, and the small space around the cylinder head 13 may be caused by oil pollution or other factors. The poor line of sight requires special tools (such as a socket wrench) when disassembling the spark plug 12, and there is a certain degree of difficulty in construction, which makes it more difficult to replace or overhaul the spark plug 12

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