Evaporation lines for orvr systems
A technology of evaporating tubes and tube diameters, which is applied to the layout, containers, and packaging combined with the fuel supply of internal combustion engines, which can solve the problems of large VOC evaporation gas emissions, improve pressure distribution and flow, reduce diffusion, and reduce energy waste Effect
Active Publication Date: 2018-06-15
郑州日产汽车有限公司
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Problems solved by technology
[0003] The invention provides an evaporation pipeline for an ORVR system, aiming to solve the problem of large VOC evaporation gas emissions from existing fuel tanks
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[0014] like figure 1 , 2 As shown, the evaporation pipeline for the ORVR system according to the present invention includes an evaporation tube 2 extending outward from the inside of the fuel tank 1, and one end of the evaporation tube 2 is connected to the refueling shut-off valve 3 and the oil filling limit position in the fuel tank 1. The valves 4 are connected respectively, and the other end is connected with the carbon canister 5 located outside the fuel tank 1 . Specifically, inside the fuel tank 1, after the two refueling cut-off valves 3 are connected together through pipelines, they are connected to the evaporation pipe 2 through a rubber pipe through a check valve, and the oil filling limit valve 4 is also connected to the evaporation pipe 2 through a rubber pipe. , so that the evaporating pipe 2 , the refueling stop valve 3 , and the fueling limit valve 4 form a passage, and the fuel vapor in the fuel tank 1 flows to the carbon canister 5 through the evaporating pi...
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The invention discloses an evaporation pipeline for an onboard refueling vapor recovery (ORVR) system. The evaporation pipeline comprises an evaporation pipe extending from the interior of a fuel tank; one end of the evaporation pipe is connected with a refueling stop valve and an oil injection limiting valve located in the fuel tank; the other end of the evaporation pipe is connected with a carbon tank outside the fuel tank; the end, connected with the carbon tank, of the evaporation pipe is of a diameter shrinkage structure, and the pipe diameter is reduced to 6.5 mm from 13.6 mm; the evaporation pipe is communicated with a circulating pipe communicated with the lateral wall of an inlet of a refueling pipe; the pipe diameter of the refueling pipe is 25-27 mm; a limiting base is arranged at the pipe opening of the refueling pipe. Compared with a traditional fuel evaporation pipeline, the pressure distribution and flow of fuel steam in the fuel tank can be effectively improved, diffusion of the fuel steam toward the atmosphere in the refueling process is greatly reduced, energy waste is effectively reduced, and environmental pollution caused in the refueling process is reduced.
Description
technical field [0001] The invention relates to the technical field of automobile fuel systems, in particular to an evaporation pipeline for an ORVR system. Background technique [0002] The evaporation of oil and gas generated during the refueling process of automobiles will cause serious pollution emissions and energy waste. According to statistics, about 1.5g of VOC gasoline vapor will be discharged from the filling port for every 1L of gasoline added, that is, 75g of VOC vapor will be discharged for every 50L of gasoline added, and 75g of VOC vapor is equivalent to 100ml of liquid gasoline disappearing into the air middle. The oil vapor recovery of vehicles using the ORVR system has improved significantly, but the evaporation pipeline of the fuel tank still has the following problems: the filling pipe cannot properly recycle the steam generated during the refueling process; the inner diameter of the filling pipe is much larger than the inner diameter of the evaporation ...
Claims
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IPC IPC(8): B60K15/035
CPCB60K15/03504
Inventor 王桂群刘亚哲朱成辉杨世东刘强朱征王可张续升钱争豪周玉森
Owner 郑州日产汽车有限公司