Throttle device for multipurpose engine

• US 20060112930A1
• Filed: 09/26/2005
• Published: 06/01/2006
• Est. Priority Date: 09/28/2004
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Tamechika, Takao, Fukushima, Tomoki, Matsuda, Hayato, Katsuragawa, Shinichi
• Granted Patent: US 7,171,945 B2
• Time in Patent Office: Days
• US Class Current: 123/399
• CPC Class Codes: F02D 11/10 of the electric type
• CPC Class Codes: F02D 2400/18 Packaging of the electronic circuit in a casing
• CPC Class Codes: F02D 2400/22 Connectors or cables specially adapted for engine management applications
• CPC Class Codes: F02D 31/004 by controlling a throttle stop
• CPC Class Codes: F02D 9/1035 Details of the valve housing
• CPC Class Codes: F02D 9/105 having a throttle position sensor detection of actuation F02D11/106
• CPC Class Codes: F02D 9/1065 Mechanical control linkage between an actuator and the flap, e.g. including levers, gears, springs, clutches, limit stops of the like

Abstract

In a multipurpose engine throttle device having a throttle body disposed at an intake pipe of the engine and housing a throttle valve, a case is integrally attached to the throttle body and housing an electric motor moving the throttle valve, a speed reducer connecting an output shaft of the motor with the throttle valve, an electronic circuit board having an electronic control unit that controls operation of the motor and a connector mounted thereon, and a harness connecting the motor with the connector, thereby reducing in overall size by efficient layout of these components.

Claims

1. A throttle device for a multipurpose engine, comprising:

a throttle body disposed at an intake pipe of the engine and housing a throttle valve that regulates air drawn in the intake pipe; and

a case integrally attached to the throttle body and housing an electric motor moving the throttle valve, a speed reducer connecting an output shaft of the motor with a throttle shaft of the throttle valve, an electronic circuit board having an electronic control unit that controls operation of the motor and a connector mounted thereon, and a harness connecting the motor with the connector.

2. The throttle device according to claim 1, wherein the case is configured to bend along a shape of the throttle body.

3. The throttle device according to claim 2, wherein the case is configured in an L-like shape to form a first space in which the speed reducer is installed and a second space in which the electronic circuit board is installed.

4. The throttle device according to claim 3, wherein the motor is installed at a region where the two spaces meet at right angles to be situated at an intermediate location between the speed reducer and the electronic circuit board.

5. The throttle device according to claim 1, wherein the case is imparted with waterproofing and dustproofing capability.