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Automatic choke system for carburetor

A technology for choke valves and carburetors, which is applied in the direction of carburetors, charging systems, machines/engines, etc., can solve problems such as speed reduction, and achieve the effects of preventing excessive thermal degradation, avoiding increase, and stable warm-up operation

Inactive Publication Date: 2006-02-01
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in order to properly perform the engine warm-up operation, it is necessary to increase the rate of opening the choke valve immediately after the engine warm-up operation starts, and to decrease the rate as the warm-up operation approaches completion

Method used

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  • Automatic choke system for carburetor
  • Automatic choke system for carburetor
  • Automatic choke system for carburetor

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Embodiment Construction

[0046] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0047] In Figure 1 to image 3 In , reference letter E denotes a four-stroke engine used as a power source for various working machines. The engine E includes: a crankcase 2 vertically supporting a crankshaft 1; a cylinder block 3 extending horizontally from the crankcase 2 and having a cylinder bore 3a; Provided in the cylinder head 4 are: an intake port 6i and an exhaust port 6e, which are opened and closed by the intake valve 7i and the exhaust valve 7e, respectively; and the valve train 8 of the exhaust valve 7e. A cover 5 for closing the valve operating chamber 9 is joined to the end face of the cylinder head 4 .

[0048] The outer ends of the intake port 6i and the exhaust port 6e are opened on one side and the opposite side of the cylinder head 4, respectively. A carburetor C having an intake path 11 communicating with the intake port 6i is joi...

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Abstract

An automatic choke system includes: a wax-type temperature sensing section; and an output section which opens a choke valve of a carburetor in response to heat receiving operation of the temperature sensing section. Temperature sensing section includes: a bottomed cylindrical housing attached to an engine with its bottom portion directed to a high-temperature portion of the engine; a bottomed movable cylinder; a stationary piston slidably supported by the movable cylinder and having one end protruding out of the movable cylinder; and a wax contained in the movable cylinder in a sealed manner, and causing the movable cylinder and the stationary piston to move relative to each other in an axial direction. The movable cylinder is slidably housed in the housing in a state in which an outer end of the stationary piston abuts against an inner surface of the bottom portion of the housing. The output section is connected to the movable cylinder. Thus, the rate of opening of the choke valve can be increased immediately after the start of engine warming-up operation, and reduced as approaching the completion of engine warming-up operation.

Description

[0001] relevant application data [0002] The entire contents of Japanese Priority Application Nos. 2004-216996, 2004-216997, 2004-216998, 2004-216999, 2004-217000 and 2004-238748 on which this application is based are incorporated herein by reference. technical field [0003] The present invention relates to an improvement of an automatic choke system for a carburetor, which includes: a wax-type temperature detection section connected to an engine; A connection is provided between the dampers and used to open the damper in response to the heat receiving operation of the temperature detecting portion. Background technique [0004] Such an automatic choke system for a carburetor is known, for example, as disclosed in Japanese Utility Model Laid-Open No. 57-182241. [0005] In a conventional automatic choke valve system for a carburetor, the wax-type temperature detecting portion has: a cylinder; a piston slidably supported in the cylinder and having one end protruding from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M1/08
Inventor 枝松茂贵森山浩铃木卓佐藤贵纪
Owner HONDA MOTOR CO LTD
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