Evaporated fuel processing device
A treatment device, a technology for evaporating fuel, applied in the direction of the power unit, the arrangement combined with the fuel supply of the internal combustion engine, the liquid fuel feeder, etc., can solve the problems of fuel leakage, difficult implementation methods, splashing, etc., and achieve the effect of reducing fuel leakage
Active Publication Date: 2016-06-15
YACHIYO IND CO LTD
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Problems solved by technology
However, in view of the structure of the fuel cutoff valve 33 that functions at a liquid level higher than the liquid level when the fuel is full, it is actually difficult to implement method (1).
In addition, when the method (2) is adopted, the problem of leakage of fuel from the carbon canister communication hole 34 still exists due to the need to increase the height dimension of the housing 38. Therefore, the leaked fuel may flow to the outlet hole along with the shaking of the vehicle body. 39 Splash
Method used
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Embodiment Construction
[0018] exist figure 1 Among them, the evaporated fuel processing device 1 of the present embodiment has a liquid level detection valve 2 , a fuel shutoff valve 3 , and a housing 8 as a valve housing. The liquid level detection valve 2 has a first float valve body 5 that detects the liquid level when the fuel is full during refueling and closes the canister communication hole 4 as a first valve seat. Specifically, when the liquid level of the fuel rises to a predetermined height during refueling, the opening (not shown) of the casing 8 is blocked by the fuel, so that the flow path leading to the outside of the fuel tank is blocked, and the inside of the fuel tank T is blocked. pressure rises. Accordingly, the fuel rises in the housing 8 , and the first float valve body 5 closes the canister communication hole 4 . Due to the closing of the carbon canister communicating hole 4, the pressure in the fuel tank further increases, and when the fuel rises in the filling pipe (not sh...
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An evaporated fuel processing device (1) includes the following: a liquid level detection valve (2) that detects a full-tank liquid level when refueling, and closes a canister through hole (4); a fuel shutoff valve (3) that closes an evaporation hole (6) when the liquid level is higher than the full-tank liquid level; and an outlet port (9) that communicates to a canister. In plan view, a first communication path (21) that enables communication between a second valve seat upper part (12) and a first valve seat upper part (11), and a second communication path (22) that enables communication between the first valve seat upper part (11) and the outlet port (9) are formed in a folded back shape at the first valve seat upper part (11). This configuration reduces fuel leakage from the outlet port (9).
Description
technical field [0001] The invention relates to a treatment device for evaporated fuel of a fuel tank. Background technique [0002] Patent Document 1 describes a prior art example of an evaporated fuel processing device mounted on a fuel tank of an automobile or the like. image 3 schematically represents the evaporative fuel device, image 3 (a) and (b) are respectively the top view and the side view of the evaporative fuel device. The evaporated fuel processing device 31 has a liquid level detection valve 32 and a fuel shutoff valve 33 . The liquid level detection valve 32 has a first float valve body 35 for closing the canister communication hole 34 as a valve seat when the fuel is filled up. Mark L1 (refer to Figure 4 ) indicates the liquid level when the fuel is full. The fuel shutoff valve 33 has a second float valve body 37 that is used as a valve seat to close when the vehicle body is tilted greatly and the liquid level reaches a predetermined position higher th...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M37/00B60K15/035F02M25/08
CPCF02M37/0076B60K15/03519F02M25/08
Inventor松崎彻中屋和成筱崎将人泽野大
OwnerYACHIYO IND CO LTD