JP2011074847A5 - - Google Patents

Description

It is a longitudinal cross-sectional view of the LPG fuel pressure reducing valve. It is the longitudinal cross-sectional view which made the cut surface different from FIG. 1 of the LPG fuel pressure-reduction valve. It is a perspective view of a pressure reducing valve for LPG fuel. It is the 4 arrow part enlarged view of FIG. It is a perspective view of a PTC heater unit. FIG. 14 is a perspective view sequentially illustrating the process of assembling the PTC holding member and the PTC element to the inner case. It is a figure which shows the assembly process of the electricity_supply part side assembly sequentially. It is the eight arrow part enlarged view of FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. It is a perspective view in the state where the cover member for gas passages was removed from the body. It is a perspective view in the state where the heating fluid passage cover member was removed from the body. FIG. 5 is a perspective view schematically showing the arrangement and communication of a plurality of passage chambers in a low pressure gas passage. FIG. 5 is a plan view schematically showing the arrangement and communication of a plurality of passage chambers in a low pressure gas passage.

Moreover, one of the inner peripheral surface of the base cylindrical portion 42a and the outer peripheral surface of the insertion cylinder 61, in this embodiment, the inner peripheral surface of the base cylindrical portion 42a and the outer periphery of the insertion cylinder 61 On the other side of the surface, in this embodiment, a plurality of ribs 62, which have their tips in contact with the inner peripheral surface of the base cylindrical portion 42a, are spaced apart in the circumferential direction, Clearance passages 60 are respectively formed.

Moreover, the gas passage cover member 18 is provided with a gas outlet pipe 99 communicating with the end point PE of the low pressure gas passage 93. Further, the gas passage cover member 18 is provided with a relief valve 100 which is inserted into the low pressure gas passage 93 near the end point PE, and the relief valve 100 has a valve hole communicating with the low pressure gas passage 93. The valve housing 102 is integrally formed with the gas passage cover member 18 so as to have a cylindrical shape with a bottom 101 and have a cylindrical shape with a bottom 101 and to be inserted into the low pressure gas passage 93; a valve body 104 slidably fitted in the valve housing 102 has a seal 103 that may close on the tip, press-fitting the open end of the valve housing 102 a connecting pipe portion 105a has one body In the state where the valve hole 101 is opened, the valve member 104 is composed of a lid member 105 fitted and fixed at a position of the valve member 104 and a spring 106 compressed between the lid member 105 and the valve member 104. Is formed to a LPG fuel discharged from the bore 101 may then flow to the connecting tube portion 105a side.

The other surface of the body 17 is provided with a recess 112 having a diameter larger than that of the gas passage groove 92, and the body 17 has a circle at a position substantially corresponding to the outer periphery of the gas passage groove 92. An outer arc wall 113 formed in an arc shape and disposed in the recess 112, and an inner arc formed in an arc at a position substantially corresponding to the inner periphery of the gas passage groove 92 and disposed in the recess 112 One end 114 a of the inner circular arc wall 114 is disposed at a position shifted in the circumferential direction to one side of the one end 113 a of the outer circular arc wall 113, and is circumferentially larger than the other end 113 b of the outer circular arc wall 113. The other end 114 b of the inner circular arc wall 114 is disposed at a position shifted in one direction.

Thus, in this embodiment, the passage longitudinal direction projecting wall 125 projects from the bottom wall 92a of the gas passage groove 92 and the bottom wall 92a of the gas passage groove 92 which is one of the gas passage cover members 18. is, the bottom wall 92a and the other a is pre-outs scan path cover member 1 8 of the gas passage cover member 1 8 of the gas passage groove 92 is formed so as to straddle the passageway longitudinal projecting wall 125 The passage width direction projecting wall 126...

A first communication passage 128 is formed between the tip of the passage longitudinal direction projecting wall 125 and the gas passage cover member 18, and the gas passage groove 92 is formed at the tip of the passage width direction projecting wall 126. The notch 130 ... for forming 2nd communication path 129 ... with the bottom wall 92a of is provided. That said passage longitudinally protruding wall 125 will be protruding from the bottom wall 92a of the gas passage grooves 92 on the side second communication passage 129 ... are arranged.

The length of each passage chamber 127 in the reference flow direction 124 is set to be larger than the width of each passage chamber 127 in the width direction of the low pressure gas passage 93, and the engine cooling water is circulated. heated fluid passage 110, out of the passageway longitudinally projecting wall 125 the low-pressure gas passage 93 to face the pair of gas passage cover member 18 and the gas passage grooves 9 2 is a gas passage wall in the protruding direction of the bottom wall 92a The bottom wall 92a, which is the gas passage wall on the second communication passage 129...

Thus, the passage longitudinal direction projecting wall 125 and the passage lateral direction projecting wall 126 are inserted into the low pressure gas passage 93 as described above, and the body 17 and the gas passage cover member 18, the passage longitudinal direction projecting wall The low pressure of the plurality of passage chambers 127 and the plurality of first and second communication passages 128 communicating with each other are made by the cooperation of the passage 125 and the passage width direction projecting wall 126. by being formed in the gas passage 93, LPG fuel, as shown by a hollow arrow in FIG. 12 and FIG. 13, the flow along the width direction of the low-pressure gas passage 93, in the width direction of the low-pressure gas passage 93 The low-pressure gas passage 93 circulates in a zigzag manner through a three-dimensional circulation path formed by combining the flow in the orthogonal direction.

By the way, in the valve mechanism 15, a back pressure chamber 132 is formed between the end wall 32 and the valve body 29 in the central cylindrical portion 17b of the body 17 so that the back surface of the valve body 29 faces. A communication hole 133 for communicating the chamber 132 to the low pressure gas passage 93 is provided in the body 17 so as to penetrate the low pressure gas passage 93, and the outer end opening of the communication hole 133 is a lid member 134. Airtightly closed. Moreover, the communication hole 133 also penetrates the passage longitudinal direction projecting wall 125, and the passage longitudinal direction projecting wall 125 is basically formed in a hollow shape so as to introduce engine cooling water into the passage longitudinal direction projecting wall 125. However, only the portion of the passage longitudinal direction projecting wall 125 where the communication hole 133 is provided is formed solid.

The PTC heater unit 41 includes an inner case 42 having the base cylindrical portion 42a, a plurality of PTC elements 43 arranged on the outer peripheral surface of the base cylindrical portion 42a, and the PTC elements 43 individually and as a bullet. The inner peripheral surface holds the plurality of electrode portions 44a sandwiching the respective PTC elements 43 between the current-carrying member 44 having the plurality of electrode portions 44a which contact in a spontaneous manner and the outer peripheral surface of the base cylindrical portion 42a. The conductive member 44 includes an annular assembly portion 44b for connecting the plurality of electrode portions 44a and the electrode portions 44a in common, and the assembly portion 44b. It consists of the terminal part 44c to which one end is connected. The collecting portion 44b commonly connected to the plurality of electrode portions 44a arranged inside the outer case 45 is arranged on one axial end side of the outer case 45 and a part of the terminal portion 44c. In a state where the current-carrying member 44 is disposed such that the current-carrying member 44 is positioned outside the outer case 45, one end side of the outer case 45 is covered with a mold portion 47 made of synthetic resin. The inner case 42 in a state in which the PTC elements 43 are arranged on the outer peripheral surface of the base cylindrical portion 42a is fitted to the current-carrying-portion-side assembly 48 including the 45 and the molded portion 47.

Moreover, since the annular fifth and sixth seal members 56 and 57 are respectively interposed between the outer peripheral portions at both ends of the inner case 42 and the both ends of the conductive portion side aggregate 48, the connector portion 47a is waterproof. By doing this, it is possible to prevent the entry of water or the like between the inner case 42 and the current collector side assembly 48 if the connector on the power supply side is connected to the connector portion 47a.

Therefore, the spring load of the diaphragm spring 83 which exerts a spring force urging the diaphragm 16 to the side of reducing the volume of the pressure application chamber 80 is a tool for the engagement recess 85 to change the axial position of the spring receiving member 87. the by rotating the adjustment screw 86 engages, but the spring receiving member 87 is moved in a direction along the axis of the adjusting screw 86 is of it Re be adjusted by stretching the diaphragm spring 83, adjusting screw A tool insertion hole 88 is provided in the diaphragm cover 22 at a position opposite to the end face provided with the engagement recess 85 of 86, and a cap 89 for closing the tool insertion hole 88 is attached to the diaphragm cover 22. That adjustment screw 86 is housed in the spring chamber 82, since the tool insertion hole 88 is closed by a cap 89, the adjusting screw 8 6 not be visible on the exterior, the adjustment screw 8 6 by the end user It is less likely to be manipulated undesirably.

Moreover, the length of the passage chamber 127 in the reference flow direction 124 is set larger than the width of the passage chamber 127 in the width direction of the low pressure gas passage 93, and the heat source in the earthenware pots by sandwiching the bottom wall 92a is a second communication passage 129 side of the bottom wall 92a of the gas passage cover member 18 and the gas passage grooves 92 face the low-pressure gas passage 93 between the low-pressure gas passage 93, Since the heating fluid passage 110 for circulating the engine cooling water is disposed, the LPG fuel flowing through the second communication passage 129 in the reference circulation direction 124 is made to be closer to the bottom wall 92a to further increase the heat transfer efficiency. It can be enhanced.