An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

The utility model provides a gas idling transition passage structure for oil and gas dual-purpose carburetor, comprising a carburetor body f and a mixing chamber 4; a choke valve 5 and a throttle valve 9 are disposed in the mixing chamber 4 in the order of the air flow direction; a gas intake pipe 2 for supplying gas to the mixing chamber 4 is disposed on the carburetor body 1; a first air inlet pipe 7 and a second air inlet pipe 8 are disposed in the carburetor body 1 in parallel; an opening of an outlet end of the second air inlet pipe 8 is located in the mixing chamber 4 and the position of the outlet end of the second air inlet pipe 8 is at the intersection of an outer circle and the mixing chamber 4 when the throttle valve 9 is closed.

The utility model provides a gas idling transition passage structure for oil and gas dual-purpose carburetor, comprising a carburetor body f and a mixing chamber 4; a choke valve 5 and a throttle valve 9 are disposed in the mixing chamber 4 in the order of the air flow direction; a gas intake pipe 2 for supplying gas to the mixing chamber 4 is disposed on the carburetor body 1; a first air inlet pipe 7 and a second air inlet pipe 8 are disposed in the carburetor body 1 in parallel; an opening of an outlet end of the second air inlet pipe 8 is located in the mixing chamber 4 and the position of the outlet end of the second air inlet pipe 8 is at the intersection of an outer circle and the mixing chamber 4 when the throttle valve 9 is closed.

A garden tool includes a gasoline engine and a power source, the gasoline engine including a fuel supply system and an ignition system. The garden tool may further include a control system with at least one sensor used for collecting a working condition signal of the gasoline engine and a controller used for receiving the working condition signal and controlling the fuel supply system and/or the ignition system according to the working condition signal received. The power source may provide a power supply for the fuel supply system, the ignition system, and the control system through the controller.

Disclosed are example embodiments of a diaphragm carburetor. Example embodiments includes: a pressure regulator; a fuel chamber for storing fuel to be introduced into an intake channel; a diaphragm; an atmospheric-pressure chamber partitioned by the diaphragm 100; a fuel supply channel that feeds the fuel, a return channel that is connected to the fuel supply channel and returns excess fuel that is not introduced into the fuel chamber to a fuel-tank side. The fuel is supplied into the intake channel while being adjusted to a predetermined pressure by the pressure regulator. The diaphragm carburetor also includes an opening and closing mechanism that opens at engine startup to allow the fuel to pass through and closes during normal driving to prevent the fuel from passing through.

Disclosed are example embodiments of a diaphragm carburetor. Example embodiments includes: a pressure regulator; a fuel chamber for storing fuel to be introduced into an intake channel; a diaphragm; an atmospheric-pressure chamber partitioned by the diaphragm 100; a fuel supply channel that feeds the fuel, a return channel that is connected to the fuel supply channel and returns excess fuel that is not introduced into the fuel chamber to a fuel-tank side. The fuel is supplied into the intake channel while being adjusted to a predetermined pressure by the pressure regulator. The diaphragm carburetor also includes an opening and closing mechanism that opens at engine startup to allow the fuel to pass through and closes during normal driving to prevent the fuel from passing through.

An integrated ignition and electronic auto-choke module for an internal combustion engine and an internal combustion engine including the same. In one aspect, the module includes a housing that is configured to be mounted to an engine block of an internal combustion engine. The housing may contain at least a portion of a first temperature sensor that measures a first temperature indicative of an engine temperature. The housing may also contain a controller and at least a portion of an ignition circuit. The controller may be coupled to the first temperature sensor and configured to determine a starting position of a choke valve based on the first temperature and operate an actuator to move the choke valve into the starting position accordingly.

An integrated ignition and electronic auto-choke module for an internal combustion engine and an internal combustion engine including the same. In one aspect, the module includes a housing that is configured to be mounted to an engine block of an internal combustion engine. The housing may contain at least a portion of a first temperature sensor that measures a first temperature indicative of an engine temperature. The housing may also contain a controller and at least a portion of an ignition circuit. The controller may be coupled to the first temperature sensor and configured to determine a starting position of a choke valve based on the first temperature and operate an actuator to move the choke valve into the starting position accordingly.

A carburetor for the combustion engine in a handheld work apparatus has a carburetor housing in which a carburetor drum is mounted rotatably about a pivot axis. The carburetor drum has a drum body which has at least one channel which runs transversely with respect to the pivot axis and forms an intake channel portion. A sensing unit for sensing at least one rotational position of the carburetor drum is provided. The sensing unit includes a control contour and a sensing device interacting with the control contour. The control contour is formed on the carburetor drum. A method for operating a combustion engine makes provision for the control device to control the supplied quantity of fuel depending on the rotational position, sensed by the sensing unit, of the carburetor drum.