Title:
FUEL PUMP
Document Type and Number:
Japanese Patent JP3843961
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel pump for improving flow of fuel between an impeller and a casing main body and a casing cover, increasing floating force of the impeller, and preventing increase of output loss.
SOLUTION: The casing main body 50 has a first plane part 55 at a position opposite to a communicating hole 44 of the impeller 40. The casing cover 60 has a second plane part 66 at the position opposed to the communicating hole 44 of the impeller 40. The fuel of a first flow passage 71 formed by a blade groove 42a and a first groove part 52 and of a second flow passage 72 formed by a blade groove 42b and a second groove part 62 flows in the communicating hole 44 through groove parts 45, 46. Therefore, the flow of the fuel between the first plane part 55 and an end surface 40a, and between the second plane part 66 and an end surface 40b is improved. Thus, the floating force is applied to the impeller 40, and the increase of the output loss in conjunction with contact and slide between the impeller 40 and the casing main body 50 and the casing cover 60 is prevented.
Inventors:
Kiyotoshi Oi
Application Number:
JP2003114272A
Publication Date:
November 08, 2006
Filing Date:
April 18, 2003
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02M37/08; F02M37/10; F04D5/00; (IPC1-7): F02M37/10
Domestic Patent References:
| JP2001115918A | ||||
| JP2002005066A | ||||
| JP7094833B2 | ||||
| JP7279881A |
Foreign References:
| WO2001081769A1 |
Attorney, Agent or Firm:
Masaki Hattori