Gas air-fuel ratio control device
A technology for controlling device and air-fuel ratio, applied in fuel injection device, combustion air/combustion-air treatment, charging system, etc., can solve the problem of ineffective utilization, limitation of service life and reliability, complicated system of air-fuel ratio control device, etc. problem, to achieve the effect of long life, high reliability and simple structure
Active Publication Date: 2017-11-07
NINGBO C S I POWER & MASCH GRP CO LTD
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Problems solved by technology
[0002] For medium and high-power diesel / natural gas dual-fuel engines, injecting intake air at the intake manifold or the intake port of the cylinder head is a relatively advanced air intake method that is widely used, but the traditional air-fuel ratio control device system is complicated, and the service life and reliability There are great limitations, and it is only suitable for medium and high pressure natural gas, and it is not suitable for low-pressure natural gas close to the air pressure of the intake pipe, which makes many low-pressure natural gas sources very inconvenient in actual use, and even cannot be effectively utilized
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Embodiment Construction
[0019] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] Figure 1 to Figure 3 It is a structural schematic diagram of the present invention.
[0021] The reference signs are: high-pressure flow channel area A, negative pressure flow channel area B, throat C, central axis L, axis line Q, center line F, natural gas nozzle 1, natural gas main pipe 1a, injection small hole 1b , Main rod body 11, positioning boss body 12, semi-elliptical body 13, bullet body 14, air intake pipe 2, H represents the mixed gas flow direction, T represents the natural gas flow direction, and K represents the air flow direction.
[0022] Figure 1 to Figure 3 It is a structural schematic diagram of the present invention, as shown in the figure, the gas air-fuel ratio control device of the present invention includes a natural gas nozzle 1, which is radially placed in the air intake pipe 2 of the engine, and the natura...
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The invention discloses a gas air-fuel ratio control device, comprising a natural gas nozzle, which is radially placed in an air intake pipe of an engine, the natural gas nozzle divides the inner cavity of the air intake pipe into two symmetrically distributed air flow channels; The channel includes a high-pressure flow channel area with a gradually smaller flow cross section and a negative pressure flow channel area with an increasing flow cross section, and the high-pressure flow channel area and the negative pressure flow channel area are formed with a throat with the smallest flow section, and a natural gas main pipe is processed in the natural gas nozzle. , and the natural gas nozzle is symmetrically machined with two rows of injection holes inclined to the corresponding negative pressure flow channel area, each injection hole is connected with the natural gas main pipe; the air in the air intake pipe is used to flow through the high pressure flow channel area. The size of the pressure difference formed in the negative pressure flow channel area when the throat is accelerated, and the amount of gas in the injection orifice is inhaled to realize the automatic adjustment and control of the optimal air-fuel ratio of the mixture after air and gas are mixed.
Description
technical field [0001] The invention relates to the technical field of air-fuel ratio control, in particular to an air-fuel ratio control device used in a diesel / natural gas dual-fuel engine or a natural gas engine, in particular to a gas air-fuel ratio control device. Background technique [0002] For medium and high-power diesel / natural gas dual-fuel engines, injecting intake air at the intake manifold or the intake port of the cylinder head is a relatively advanced air intake method that is widely used, but the traditional air-fuel ratio control device system is complicated, and the service life and reliability There are great limitations, and it is only suitable for medium and high pressure natural gas, and it is not suitable for low-pressure natural gas close to the air pressure of the intake pipe. This makes many low-pressure natural gas sources very inconvenient in actual use, and even cannot be effectively utilized. Contents of the invention [0003] The technical ...
Claims
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IPC IPC(8): F02M35/104F02M43/00
Inventor 徐玉国沈建华刘清明吴杰
Owner NINGBO C S I POWER & MASCH GRP CO LTD