FUEL INJECTION APPARATUS

• US 20100252659A1
• Filed: 04/01/2010
• Published: 10/07/2010
• Est. Priority Date: 04/03/2009
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: MIYAMOTO, Yutaka, FUJINO, Tomoki, KONDO, Jun, KAGAMI, Shu
• Granted Patent: US 8,444,069 B2
• Time in Patent Office: Days
• US Class Current: 239/585.500
• CPC Class Codes: F02M 2200/24 Fuel-injection apparatus with sensors
• CPC Class Codes: F02M 2200/9015 Elastomeric or plastic materials
• CPC Class Codes: F02M 47/027 Electrically actuated valves draining the chamber to release the closing pressure
• CPC Class Codes: F02M 51/005 Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus

Abstract

A fuel injection apparatus includes a body, a nozzle, a pressure control unit, a physical quantity measurement unit, a first terminal, a second terminal, a positioning member, and a resin connector main body portion. The pressure control unit controls opening and closing of the nozzle The physical quantity measurement unit outputs an electric signal in accordance with a physical quantity of high pressure fuel. The first terminal is connected to the pressure control unit. The second terminal connected to the physical quantity measurement unit. The positioning member integrally holds the first terminal and the second terminal and locates the first terminal and the second terminal at predetermined positions. The connector main body portion receives therein the positioning member.

Claims

1. A fuel injection apparatus comprising:

a body having a high-pressure fuel passage that allows high pressure fuel to flow therethrough;

a nozzle having an injection orifice that allows high pressure fuel to be injected therethrough when the nozzle is opened;

a pressure control unit that controls opening and closing of the nozzle by controlling pressure applied to a nozzle needle of the nozzle in accordance with an electric signal received from an exterior;

a physical quantity measurement unit that outputs an electric signal in accordance with a physical quantity of high pressure fuel;

a first terminal connected to the pressure control unit;

a second terminal connected to the physical quantity measurement unit;

a positioning member that integrally holds the first terminal and the second terminal and locates the first terminal and the second terminal at predetermined positions; and

a connector main body portion that receives therein the positioning member, the connector main body portion being made of a resin.

2. The fuel injection apparatus according to claim 1, wherein:

the first terminal has a first part connected to a first terminal of an external connector and has a second part connected to the pressure control unit, the first part of the first terminal having a thickness greater than a thickness of the second part of the first terminal; and

the second terminal has a first part connected to a second terminal of the external connector and has a second part connected to the physical quantity measurement unit, the first part of the second terminal having a thickness greater than a thickness of the second part of the second terminal.

3. The fuel injection apparatus according to claim 1, further comprising:

a cover member that covers an end portion of the body remote from the nozzle, the cover member having a projection portion, wherein;

the positioning member is a flat plate; and

the positioning member has a positioning bore that is fitted with the projection portion of the cover member.

4. The fuel injection apparatus according to claim 1, wherein:

the second part of the first terminal is curved to be connected to the pressure control unit; and

the second part of the second terminal is curved to be connected to the physical quantity measurement unit.

5. The fuel injection apparatus according to claim 1, wherein:

the first terminal is one of a plurality of first terminals that are positioned on a first plane;

the second terminal is one of a plurality of second terminals that are positioned on a second plane;

the first plane is spaced away from the second plane by a predetermined distance therebetween; and

the first plane is in parallel with the second plane.