Heat exchanger system for charge forming apparatus

Claim 2

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member having an elongated fuel circulating channel therein, the channel in the heat exchanger member being a perforate region of undulated configuration, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 3

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member being a planar laminate having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 4

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member being a planar laminate having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 5

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member being of gasket material having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 6

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member being of gasket material having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 7

Charge forming apparatus, in combination, a body construction, said body construction including a first body section and a second body section, a fuel and air mixing passage in one body section, a fuel chamber in the other body section, aperture means for discharging fuel into the mixing passage, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, a cover member for the body section providing the fuel chamber, said fuel flow regulating means being mounted by the cover member, a fuel inlet passage in the cover member, means for conveying fuel under pressure from a supply to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, said fuel outlet passage being in the body section providing the fuel chamber, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 8

Charge forming apparatus, in combination, a body construction, said body construction including a first body section and a second body section, a fuel and air mixing passage in one body section, a fuel chamber in the other body section, aperture means for discharging fuel into the mixing passage, passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, a cover member for the body section providing the fuel chamber, said fuel flow regulating means being mounted by the cover member, a fuel inlet passage in the cover member, means for conveying fuel under pressure from a supply to the fuel flow regulating means, a heat exchanger member secured to said body construction in heat-transferring relation with a surface of the body construction, said heat exchanger member having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, said fuel outlet passage being in the body section providing the fuel chamber, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 9

Charge forming apparatus according to claim 2 wherein the body construction includes a first body section and a second body section, the fuel and air mixing passage being in one body section, and the fuel chamber being in the other body section, the fuel inlet passage and fuel outlet passage being in the body section provided with the fuel chamber.

Claim 10

Charge forming apparatus according to claim 2 including a second heat exchanger member having an elongated fuel circulating channel therein in heat-transferring relation with another surface of the body construction, means in the body construction for conveying fuel from the inlet passage to the channel in said second heat exchanger member, and means in said body construction in communication with the channel in said second heat exchanger member and said outlet passage for returning fuel circulating in the channel in said second heat exchanger member to the outlet passage.

Claim 11

Charge forming apparatus according to claim 2 wherein the body construction includes a first body section and a second body section, the fuel and air mixing passage being in the first body section, the fuel chamber being in the second body section, the heat exchanger member being in contiguous heat-transferring relation with one surface of the second body section, a second heat exchanger member in contiguous heat-transferring relation with another surface of the second body section, a fuel circulating channel in the second heat exchanger member, and means in the second body section establishing communication between the fuel channel in the second heat exchanger member and the fuel inlet and outlet passages.

Claim 12

Charge forming apparatus, in combination, a body construction, said body construction including a first body section and a second body section, a fuel and air mixing passage in the first body section, a fuel chamber in the second body section, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction, said heat exchanger member being in contiguous heat-transferring relation with a surface of the second body member, said heat exchanger member having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, a plurality of laminar members disposed between the heat exchanger member and the first body section, said laminar members and the heat exchanger member having perforate regions in communication with the passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means securing the body sections, the laminar members and the heat exchanger member in assembled relation, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 13

Charge forming apparatus, in combination, a body construction, said body construction including a first body section and a second body section, a fuel and air mixing passage in the first body section, a fuel chamber in the second body section, aperture means for discharging fuel into the mixing passage, a fuel chamber in the body construction, passages in the body construction, means associated with the fuel chamber for regulating flow of liquid fuel into the fuel chamber, means for conveying fuel under pressure from a supply through an inlet passage to the fuel flow regulating means, a heat exchanger member secured to said body construction, said heat exchanger member being in contiguous heat-transferring relation with a surface of the second body member, said heat exchanger member having an elongated fuel circulating channel therein, passage means for delivering fuel from the inlet passage to the channel in said heat exchanger member, a fuel outlet passage in communication with the channel, a plurality of laminar members disposed between the heat exchanger member and the first body section, said laminar members and the heat exchanger member having perforate regions in communication with the passages in the body construction for conveying fuel from the fuel chamber to the aperture means, means securing the body sections, the laminar members and the heat exchanger member in assembled relation, and means connected with the outlet passage for returning fuel circulating in said channel to the fuel supply.

Claim 14

Charge forming apparatus according to claim 2 wherein the body construction includes a first body section and a second body section, the fuel and air mixing passage being in the first body section, the fuel chamber being in the second body section, the heat exchanger member being in heat-transferring relation with the second body section, a second heat exchanger member having a fuel circulating channel therein in heat-transferring relation with the first body section, a laminate in contiguous engagement with the second heat exchanger member, the fuel inlet passage and the fuel outlet passage being in the second body section providing the fuel chamber, said inlet and outlet passages being in communication with the fuel circulating channels in the heat exchanger members.

Claim 15

Charge forming apparatus according to claim 2 wherein the body construction includes a first body section and a second body section, the fuel and air mixing passage being in the first body section, the fuel chamber being in the second body section, the heat exchanger member being in heat-transferring relation with the second body section, a second heat exchanger member having a fuel circulating channel therein in heat-transferring relation with the first body section, a laminate in contiguous engagement with the second heat exchanger member, the fuel inlet passage and the fuel outlet passage being in communication with the fuel circulating channal in the first heat exchanger member, and second fuel inlet and outlet passages in said laminate in communication with the fuel circulating channel in the second heat exchanger member.

Claim 16

Charge forming apparatus including, in combination, a body construction having a first body section and a second body section, a fuel and air mixing passage in the first body section, aperture means for delivering fuel into the mixing passage, said second body section having a fuel chamber, means associated with the fuel chamber for regulating fuel flow into the chamber, a cover member for the fuel chamber having a fuel inlet passage, a heat exchanger laminate in contiguous relation with a surface of the second body section, a plurality of laminar members disposed between the heat exchanger laminate and the first body section, means securing the body sections, the laminar members and the heat exchanger laminate in assembled relation, said laminar members and heat exchanger laminate having perforate regions through which fuel flows from the fuel chamber to the orifice means, said heat exchanger laminate having an elongated channel therein spaced from the perforate regions, said fuel inlet passage adapted to receive fuel under pressure from a supply, means in communication with the fuel inlet passage for conveying fuel to one end region of the channel in the heat exchanger laminate, and a fuel outlet passage in said second body section in communication with the other end region of the channel in the heat exchanger laminate, said outlet passage adapted to be connected with means for returning circulating fuel from the channel to the fuel supply.

Claim 17

Charge forming apparatus including, in combination, a body construction having a first body section and a second body section, a fuel and air mixing passage in the first body section, aperture means for delivering fuel into the mixing passage, said second body section having a fuel chamber, means associated with the fuel chamber for regulating fuel flow into the chamber, a cover member for the fuel chamber having a fuel inlet passage, a heat exchanger laminate in contiguous relation with a surface of the second body section, a plurality of laminar members disposed between the heat exchanger laminate and the first body section, means securing the body sections, the laminar members and the heat exchanger laminate in assembled relation, said laminar members and heat exchanger laminate having perforate regions through which fuel flows from the fuel chamber to the orifice means, said heat exchanger laminate having an elongated channel therein spaced from the perforate regions, said fuel inlet passage adapted to receive fuel under pressure from a supply, means in communication with the fuel inlet passage for conveying fuel to one end region of the channel in the heat exchanger laminate, and a fuel outlet passage in said second body section in communication with the other end region of the channel in the heat exchanger laminate, said outlet passage adapted to be connected with means for returning circulating fuel from the channel to the fuel supply.

Claim 18

A fuel system for an internal combustion engine including charge forming apparatus and a fuel supply therefor, said charge forming apparatus having a body construction providing a fuel bowl, means associated with said fuel bowl for regulating fuel flow into the fuel bowl, a fuel pump connected with the fuel supply and adapted to pump fuel in excess of the fuel requirements for the engine, a heat exchanger laminar member secured to the body construction in heat-transferring relation therewith, said heat exchanger laminar member having a fuel circulating channel therein, means conveying fuel from the fuel pump to the fuel bowl and to the channel in the heat exchanger laminar member, and means establishing communication between the channel in said heat exchanger laminar member and the fuel supply for continuously returning circulating fuel in said channel to the fuel supply during operation of the fuel pump.

Claim 19

A fuel system for an internal combustion engine including charge forming apparatus and a fuel supply therefor, said charge forming apparatus having a body construction providing a fuel bowl, means associated with said fuel bowl for regulating fuel flow into the fuel bowl, a fuel pump connected with the fuel supply and adapted to pump fuel in excess of the fuel requirements for the engine, a heat exchanger laminar member secured to the body construction in heat-transferring relation therewith, said heat exchanger laminar member having a fuel circulating channel therein, means conveying fuel from the fuel pump to the fuel bowl and to the channel in the heat exchanger laminar member, and means establishing communication between the channel in said heat exchanger laminar member and the fuel supply for continuously returning circulating fuel in said channel to the fuel supply during operation of the fuel pump.

Claim 20

A fuel system for an internal combustion engine including charge forming apparatus and a supply of liquid fuel therefor, said charge forming apparatus having a body construction providing a fuel bowl, means associated with said fuel bowl for regulating fuel flow into the fuel bowl, a fuel pump connected with the fuel supply and adapted to pump fuel in excess of the fuel requirements for the engine, a plurality of heat exchanger laminar members secured to the body construction in heat-transferring relation therewith, each of said heat exchanger members having a fuel circulating channel therein, means conveying fuel from the fuel pump to the fuel bowl and to the channels in the heat exchanger laminar members, and means establishing communication of the channels in said heat exchanger laminar members with the fuel supply for returning fuel circulating in each of said channels to the fuel supply during operation of the fuel pump.

Claim 21

A fuel system for an internal combustion engine including charge forming apparatus and a supply of liquid fuel therefor, said charge forming apparatus having a body construction providing a fuel bowl, means associated with said fuel bowl for regulating fuel flow into the fuel bowl, a fuel pump connected with the fuel supply and adapted to pump fuel in excess of the fuel requirements for the engine, a plurality of heat exchanger laminar members secured to the body construction in heat-transferring relation therewith, each of said heat exchanger members having a fuel circulating channel therein, means conveying fuel from the fuel pump to the fuel bowl and to the channels in the heat exchanger laminar members, and means establishing communication of the channels in said heat exchanger laminar members with the fuel supply for returning fuel circulating in each of said channels to the fuel supply during operation of the fuel pump.

Claim 22

A fuel system for an internal combustion engine including charge forming apparatus and a supply of liquid fuel therefor, said charge forming apparatus having a body construction providing a fuel bowl, means associated with the fuel bowl for regulating fuel flow into the fuel bowl, a fuel pump connected with the fuel supply and adapted to pump fuel in excess of the fuel requirements for the engine, a heat exchanger means for the charge forming apparatus, said heat exchanger means including a heat exchanger laminar member having an open area providing an elongated fuel circulating channel, one major surface of the laminar member being in contiguous heat-transferring relation with a surface of the body construction, a laminate engaging the other major surface of the laminar member, means conveying fuel from the fuel pump to the fuel bowl and to the channel in the laminar member, and means establishing communication between the channel in the laminar member and the fuel supply for returning fuel circulating in said channel to the fuel supply during operation of the fuel pump.

Claim 23

A fuel system for an internal combustion engine including charge forming apparatus and a supply of liquid fuel therefor, said charge forming apparatus having a body construction providing a fuel bowl, means associated with the fuel bowl for regulating fuel flow into the fuel bowl, a fuel pump connected with the fuel supply and adapted to pump fuel in excess of the fuel requirements for the engine, a heat exchanger means for the charge forming apparatus, said heat exchanger means including a heat exchanger laminar member having an open area providing an elongated fuel circulating channel, one major surface of the laminar member being in contiguous heat-transferring relation with a surface of the body construction, a laminate engaging the other major surface of the laminar member, means conveying fuel from the fuel pump to the fuel bowl and to the channel in the laminar member, and means establishing communication between the channel in the laminar member and the fuel supply for returning fuel circulating in said channel to the fuel supply during operation of the fuel pump.

Claim 24

A fuel system including charge forming apparatus comprising a body construction having a fuel bowl adapted to be supplied with liquid fuel from a supply, fuel passage means in said body construction, means associated with said fuel bowl for regulating fuel flow from the passage means into the fuel bowl, said passage means adapted to receive liquid fuel under pressure from the supply, a heat exchanger means including a laminar member secured to the body construction and in heat-transferring relation therewith, said laminar member having an undulated fuel circulating channel, said passage means being in communication with one end of said channel for conveying fuel from the passage means into the channel, and fuel conveying means in communication with the other end of the channel and the fuel supply for returning circulating fuel from the channel to the fuel supply.

Claim 25

A fuel system including charge forming apparatus comprising a body construction having a fuel bowl adapted to be supplied with liquid fuel from a supply, fuel passage means in said body construction, means associated with said fuel bowl for regulating fuel flow from the passage means into the fuel bowl, said passage means adapted to receive liquid fuel under pressure from the supply, a heat exchanger means including a laminar member secured to the body construction and in heat-transferring relation therewith, said laminar member having an undulated fuel circulating channel, said passage means being in communication with one end of said channel for conveying fuel from the passage means into the channel, and fuel conveying means in communication with the other end of the channel and the fuel supply for returning circulating fuel from the channel to the fuel supply.

Claim 26

Charge forming apparatus according to claim 6 including a third heat exchanger member having an elongated fuel circulating channel therein in heat transferring relation with a third surface of the body construction.

Claim 27

Charge forming apparatus according to claim 16 including means in the body construction for conveying fuel from the first passage means to the channel in the third heat exchanger member, and means in communication with the outlet passage and the channel in the third heat exchanger member for returning circulating fuel from the channel in the third heat exchanger member to the outlet passage.

Claim 28

The combination according to claim 1 wherein the heat exchanger member is of substantial thickness and has the elongated fuel channel in one surface region thereof, said channel being of a depth approximately the same as its width, the surface of the heat exchanger member provided with the elongated channel being in heat-transferring relation with the body construction.

Claim 29

The combination according to claim 18 wherein the heat exchanger member is of resinous material.

Claim 30

The combination according to claim 19 wherein the heat exchanger member has an opening therein and a transverse passage in communication with the opening accommodating fuel flow from the fuel chamber to the orifice means, said opening having a threaded portion, a valve member extending into the opening and having a threaded body portion cooperating with the threaded portion of the opening, said valve member having a tenon portion and a needle valve portion, said valve member being adjustable for controlling fuel flow to the orifice means, and a portion of the opening having inwardly extending projections snugly engaging the tenon portion of the valve means for guiding the tenon portion.

Claim 31

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage and a fuel chamber, aperture means for discharging fuel from the fuel chamber into the mixing passage, said body construction having a planar surface, a planar heat exchanger member having a fuel circulating channel therein, said heat exchanger member being in contiguous heat-transferring relation with the planar surface of the body construction, a laminate in contiguous engagement with the heat exchanger member, fuel inlet and outlet passages in said laminate, said fuel inlet and outlet passages being in communication with the fuel circulating channel in the heat exchanger member, and means securing said body construction, heat exchanger member and laminate in assembled relation.

Claim 32

Charge forming apparatus including, in combination, a body construction having a fuel and air mixing passage and a fuel chamber, aperture means for discharging fuel from the fuel chamber into the mixing passage, said body construction having a planar surface, a planar heat exchanger member having a fuel circulating channel therein, said heat exchanger member being in contiguous heat-transferring relation with the planar surface of the body construction, a laminate in contiguous engagement with the heat exchanger member, fuel inlet and outlet passages in said laminate, said fuel inlet and outlet passages being in communication with the fuel circulating channel in the heat exchanger member, and means securing said body construction, heat exchanger member and laminate in assembled relation.