Patent
Fuel evaporator for internal combustion engine
| العنوان: | Fuel evaporator for internal combustion engine |
|---|---|
| Patent Number: | 4,593,670 |
| تاريخ النشر: | June 10, 1986 |
| Appl. No: | 06/671,614 |
| Application Filed: | November 15, 1984 |
| مستخلص: | A fuel evaporator comprises a ring-shaped heater element made of PTC ceramic, a pipe made of heat conductive metal and disposed within an air-fuel passage of an internal combustion engine therealong and a pair of terminal members for supplying power to the heater element. The heater element is disposed closely in contact with the outer periphery of the upper end of the pipe. One end of each of the pair of terminal members is closely in contact with each of the upper and under surfaces of the heater element. The fuel evaporator further comprises a plate-shaped compact made of electricity insulating rubber or synthetic resin and formed around the upper end of the pipe. Within the compact, the heater element, the upper end of the pipe and the terminal members are embedded. |
| Inventors: | Nara, Akio (Okazaki, JPX); Yazawa, Akio (Obu, JPX); Akiyama, Yoshinori (Okazaki, JPX) |
| Assignees: | Nippondenso Co., Ltd. (Kariya, JPX) |
| Claim: | What is claimed is |
| Claim: | 1. A fuel evaporator disposed in an air-fuel mixture passage of an internal combustion engine for promoting the evaporation of fuel within an air-fuel mixture, comprising |
| Claim: | (1) a ring-shaped heater element made of PTC ceramic; |
| Claim: | (2) a pipe through which the air-fuel mixture passes; said pipe being made of heat conductive metal and being disposed within said air-fuel passage therealong; said pipe comprising a flange projecting outwardly from an upper end thereof; |
| Claim: | said heater element being disposed under and closely in contact with said flange of said pipe; |
| Claim: | (3) a pair of terminal members for supplying power to said heater element, which is composed of a first terminal member and a second terminal member, said first terminal member comprising a ring portion disposed above said heater element so as to be closely in contact therewith, and a lead portion of which one end is connected to said ring portion and the other end extends outwardly in the radial direction and is connected to a power supply line; said second terminal member comprising a ring portion disposed under said heater element so as to be closely in contact therewith, and a lead portion arranged along said lead portion of said first terminal member, one end of said lead portion of said second terminal member being connected to said ring portion thereof while the other end of said lead portion of said second terminal member being connected to another power supply line; |
| Claim: | said flange of said pipe comprising said ring portion of said first terminal member; |
| Claim: | (4) an electricity insulating casing for accommodating and closely sandwiching said flange of said pipe, said heater element and said ring portion of said second terminal member, said casing being composed of a ring-shaped bottom plate having an inner hole and a lid member having an opening of a shape corresponding to said inner hole of said bottom plate; and |
| Claim: | (5) a compact made of electrically insulating rubber or synthetic resin and formed into a plate shape around said casing by moulding so that said casing is embedded within said compact. |
| Claim: | 2. A fuel evaporator disposed in an air-fuel mixture passage of an internal combustion engine for promoting the evaporation of fuel within an air-fuel mixture, comprising |
| Claim: | (2) a pipe made of heat conductive metal, which is disposed along the air-fuel mixture passage and has a cylindrical portion through which the air-fuel mixture passes and a flange portion extending in a direction of an outer periphery of said cylindrical portion from an end portion of said cylindrical portion; |
| Claim: | said ring-shaped heater element being closely adhered to said flange portion; |
| Claim: | (3) a pair of terminal members for supplying power to said heater element, which is composed of a first terminal member and a second terminal member, said first terminal member being in contact with an upper surface of said heater element and being connected to a power supply line and said second terminal member being in contact with an under surface of said heater element and being connected to another power supply line; |
| Claim: | (4) a casing made of an electrically insulating material for accommodating said heater element, said flange portion of said pipe, an end portion of said first terminal member and an end portion of said second terminal member so as to be closely adhered to one another, said casing being composed of a ring-shaped bottom plate having an inner hole corresponding to the air-fuel mixture passage and a lid member having an opening of a shape corresponding to said inner hole; and |
| Claim: | (5) a compact made of electrically insulating rubber or synthetic resin and formed into a plate shape around said casing by moulding so that said casing is embedded within said cmpact. |
| Claim: | 3. A fuel evaporator according to claim 1, wherein said the other end of said first terminal member and said the other end of said second terminal member project out of said compact outwardly. |
| Claim: | 4. A fuel evaporator according to claim 1, wherein said the other end of each of said first and second terminal members and one end of each of said power supply lines, which is connected to each of said first and second terminal members are embedded within said compact. |
| Claim: | 5. A fuel evaporator according to claim 1, wherein the outer periphery of said compact is interposed between an end of a carburetor and an end of an intake manifold which are opposed and connected to each other; whereby said fuel evaporator is retained within said air-fuel mixture passage. |
| Current U.S. Class: | 123/545; 123/546; 123/549; 261/142; 219/206 |
| Current International Class: | F02M 3100 |
| Patent References Cited: | 4361125 November 1982 Igashira et al. 4377148 March 1983 Ishida 4390000 June 1983 Igashira et al. 4463737 August 1984 Berg |
| Primary Examiner: | Lazarus, Ronald H. |
| Attorney, Agent or Firm: | Cushman, Darby & Cushman |
| رقم الانضمام: | edspgr.04593670 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |