TWI280319B - Tilt sensitive fuel cut valve and fuel pump - Google Patents

Abstract

A tilt sensitive fuel cut valve which is compact in size but superior in fuel cutoff capability and a fuel pump provided therewith are disclosed. In a tilt sensitive fuel cut valve for blocking a fuel passage by means of a ball valve 35 (37) configured to be displaced from a valve opening position to a valve closing position in response to a tilt, there are provided a chamber 34 (36) for establishing communication between a fuel inlet and a fuel outlet through a tubular flow passage 81, the ball valve 35 (37) accommodated within the chamber 34 (36), and at least one auxiliary passage which is formed along an inner surface of the chamber 34 (36) and which is recessed into a groove extending in the direction of the flow passage.

Description

The limitation of the construction of !28〇3i9 will increase. SUMMARY OF THE INVENTION An object of the present invention is to provide a tilt-inductive fuel cut valve and a fuel which are excellent in the ability to interrupt electric power, and which are excellent in the ability to block the robber material. The tilt-inductive combustion shutoff valve and the fuel pump for sealing the fuel passage are characterized by the following means. 1) The feature of the tilt-sensing type fuel cut-off valve of the present invention. The fuel inlet and the fuel outlet are connected to the fuel inlet and the fuel outlet, and the ball is formed in the front of the container and the concave = extending in the direction of the flow path. For example, the valve is elastically resilient. Made of high polymer, a lip valve seat is formed at the side edge of the flow path of the ΐ material outlet. Cut off ^. The fuel pump of % Ming is formed into a tilt-induced plastic fuel. According to the present invention, the following effects can be achieved. The auxiliary pipe of the combustion-assisted two-break valve _ the fuel formed by the inner surface of the C-tube and the ball-shaped gap is I-stop. Since the ball valve is made of rubber, the ball valve can be closed. (3) Since the seat portion of the tilt-inductive fuel cut valve is set to 1280319 lip structure, the ball valve can be closed. (4) Since the fuel pump and the tilt-inductive fuel cut-off body, when they are respectively different components, it is not necessary to use the connecting pipe j member to fasten both. [Embodiment] Fig. 1 is a cross-sectional view showing an arrangement example of a fuel system including the present invention. The valve fuel pump 1G is a portion of the flange portion chute 20 provided in the upper portion thereof, and a main portion thereof is accommodated in the minus (four) 30 of the lift; a sense of the tilt state is generated - and the second fuel cut valve 31, 32; and residual pressure holding valve 33), and in the above-mentioned first and second fuel cut valves = f standby tubes 34, 36, for example, rubber high polymer ball type valves 35, 37. 1 King's mouth re-injection in the bottom of the fuel pump 1 (not shown, device (10) ainer) 12 'filtered, fuel pump 12 pumped fuel system = wide - fuel cut-off valve 31, The two fuel cut valves 32 and 2% are supplied to the discharge pipe 45 (see Fig. 2), and the fuel pipe 15 connected to the discharge pipe 45 is supplied to the lower portion; Fig. 2 is a partial cross-sectional view showing the structure of the fuel pump 10, and the second and second fuel cut valves 31, 32 are 1280319 built in the fuel line C through the communication path C. It is sucked or pumped to the upper part of the pump body I6 by (Biv m/motor and impeller and other components with pump function). After that, the material is: broken =: communication path 42 and pressure regulation When the vehicle is introduced to the first-combustion standby normal posture, the first L1/ball valve 35 in the first fuel cut-off chamber 31 is stopped at the upstream-side end of the open position machine tube 34 and enters the first The fuel of the fuel cut-off valve 31 is introduced into the second fuel cut-off valve 32 via the first standby k-way 43. When the first vehicle is in the normal posture, the second fuel cut-off valve 32 is in the valve position ΐ = When the ball valve 37 is stopped at the upstream end, the fuel is supplied to the second fuel shutoff valve via the second H', the communication passage 44, the check valve 33, and the discharge shirt. Supply map. Ϊ=; ί==3:, the function of 32 is ^^ 35 蚺 valve position, so it is supplied from the communication path 42 to the adjustment. The second white position is in the first standby tube 34, the communication path 43, the second To::: The valve 33 is supplied from the discharge pipe 45 to the fuel; the injection device passage 44 is laterally deflected substantially horizontally by the third _ super-seat-standby pipe 36, and the ball === 1280319 is displaced by the inertial force. The valve is abutted against the valve seat, so that the fuel passage is blocked in any case. Therefore, when the vehicle is tilted excessively beyond the limit angle Θ max, the fuel injection is prevented. Fig. 4 shows the foregoing 2 is an enlarged cross-sectional view showing a structure of a valve seat portion of the first fuel cut valve 31 surrounded by a broken-line circular frame a, and FIG. 5 is an enlarged cross-sectional view showing a conventional technical structure of the same portion.

Not shown, the seat portion of the second fuel cut valve 32 is also the same as that of Fig. 4. In the conventional technique of Fig. 5, the communication path 43 and the first standby tube 34 are arranged concentrically. On the other hand, in the embodiment of the present invention shown in Fig. 4, when the vehicle is tilted, the communication passage 43 is opened eccentrically with respect to the standby pipe 34, and the edge portion of the opening portion 6G is annular. The front end is protruded at an acute angle (4) into a lip-shaped structure. As described above, in the present embodiment, the opening of the communication passage 43 (44) to which the standby pipe 34 and the branch are connected is not only eccentric in the downward direction but also in the case of The annular shape is formed at the opening portion == the page is slanted 61' and the fuel breaking ability is improved when the ball valve is made of rubber 3. Fig. 6(a) and Fig. 6(b) are diagrams showing the cross-sectional structure of the machine tube 34 in the second drawing B, and Fig. 7 is a cross-sectional structural view showing the conventional and I. Further, although not shown, the same portion of the second portion in the second configuration also has the same configuration. f蜮官36, in the first embodiment shown in Fig. 6(a), in the t-serving officer 34 (36) 10

Claims (1)

L28〇3i9 Months 曰 repair (cool) is replacing page +, the scope of application for patents: 1 - a kind of tilt-inductive fuel cut-off valve, which is shifted from the open position to the closed position by applying the tilting state 2 a ball valve for sealing a fuel passage, comprising: a standby pipe that connects the fuel inlet and the fuel outlet by a cylindrical flow path; a ball valve that is received in the standby pipe; formed on the inner side of the standby pipe a surface, and at least one auxiliary passage recessed in a groove shape and extending in the k-way direction; and an annular valve seat formed on a side edge portion of the flow path of the fuel outlet. 2. A tilt-inductive fuel cut-off valve according to the scope of the patent application, wherein the ball valve is a high polymer having elastic recovery. 3. The tilt-inductive fuel cut valve of claim 2 or 2, wherein the front end of the annular valve seat protrudes at an acute angle. 4. The tilt-inductive fuel cut-off valve of claim 3, wherein the annular valve seat has a lip-like structure. 5. The tilt-inductive fuel cut valve of the first aspect of the patent application scope wherein the two standby pipes are connected in series and are bent at a predetermined angle. 6. The fuel pump is integrally formed to induce an inclination state. _^月(3⁄4修(更)正换页1280319 ==The ball-type 阙 plugging fuel passage that is displaced to the closed position, the standby pipe that connects the fuel inlet and the fuel outlet with the cylindrical flow path, · Contains a ball valve in the standby tube; & ' formed on the inner side surface of the standby tube, and recessed in a groove shape and extending in at least one auxiliary passage in the flow path direction; and a flow path side edge formed in the fuel outlet The annular valve seat of the department. 7. The fuel pump of claim 6, wherein the ball valve is a polymer having elastic recovery. 8·If the patent application scope is the sixth item or the The fuel pump of the seventh aspect, wherein the front end of the annular valve seat protrudes at an acute angle. 9. The fuel pump of claim 8, wherein the annular valve seat has a lip structure. The fuel of the sixth item of the patent scope, wherein the two standby pipes are connected in series to bend a predetermined angle.