Abstract:
The invention concerns a method for controlling the fuel supply to an internal combustion engine at start-up, the engine having a fuel supply system. The invention also concerns a carburetor having a fuel supply system including a main fuel path connecting a diaphragm controlled regulating chamber to a main outlet in the region of the venturi section, the main fuel path including an actively controlled fuel valve, and an idling fuel path branching off from the main fuel path downstream of the valve and ending in at least one idling outlet in the region of a throttle valve, the fuel supply system further including a start fuel line starting upstream or downstream of the fuel valve and ending in at least one start fuel outlet to the intake channel.
Abstract:
The invention concerns a method for controlling the fuel supply to an internal combustion engine at start-up, the engine having a fuel supply system. The invention also concerns a carburetor having a fuel supply system including a main fuel path connecting a diaphragm controlled regulating chamber to a main outlet in the region of the venturi section, the main fuel path including an actively controlled fuel valve, and an idling fuel path branching off from the main fuel path downstream of the valve and ending in at least one idling outlet in the region of a throttle valve, the fuel supply system further including a start fuel line starting upstream or downstream of the fuel valve and ending in at least one start fuel outlet to the intake channel.
Abstract:
A fixture configured to file a chain of a chain saw. The fixture includes at least one pair of flanges, wherein each of the flanges has a first end and a second end. Further, a first connecting portion connects the flanges at their first ends, and a second connecting portion connects the flanges at their second ends. Further, the first connecting portion includes a pair of counter holds configured to provide area contact with a guide bar of the chain saw. The fixture also includes a cam portion pivotally coupled to the second connecting portion, wherein the cam portion and at least one of the counter holds simultaneously secure the fixture to the guide bar.
Abstract:
A fuel supply system for small two-stroke internal combustion engines for e.g. chain saws, line trimmers and similar hand-held power-tools including a diaphragm carburetor (20) equipped with a purging system (80a, 81a) or priming system (80b, 81b) for facilitating starting of the engine (1). Downstream of the diaphragm (30), the carburetor has a fuel valve (60) with a fuel cavity (73), which when the valve is not closed being connected via a fuel conduit (37) to a fuel nozzle (35, 36) in a main air passage (21) in the carburetor. The purging system or priming system including a fuel line (80a; 80b), which is provided with a manually operated pump (81a; 81b) and is connected between a fuel tank (26) and either the fuel cavity (73) or the fuel conduit (37).
Abstract:
A fuel supply system for small two-stroke internal combustion engines for e.g. chain saws, line trimmers and similar hand-held power-tools including a diaphragm carburetor (20) equipped with a purging system (80a, 81a) or priming system (80b, 81b) for facilitating starting of the engine (1). Downstream of the diaphragm (30), the carburetor has a fuel valve (60) with a fuel cavity (73), which when the valve is not closed being connected via a fuel conduit (37) to a fuel nozzle (35, 36) in a main air passage (21) in the carburetor. The purging system or priming system including a fuel line (80a; 80b), which is provided with a manually operated pump (81a; 81b) and is connected between a fuel tank (26) and either the fuel cavity (73) or the fuel conduit (37).
Abstract:
The present invention discloses a fixture (100) configured to file a chain (202) of a chain saw. The fixture (100) includes at least one pair of flanges (102A, 102B), wherein each flange of the at least one pair of flanges (102A, 102B) has a first end (104A, 104B) and a second end (106A, 106B). Further, a first connecting portion (111) connects the flanges (102A, 102B) at their first ends (104A, 104B), and a second connecting portion (113) connects the flanges (10A, 102B) at their second ends (106A, 106B). Further, the first connecting portion (111) includes a pair of counter holds (112, 114) configured to provide area contact with a guide bar (208) of the chain saw. The fixture (100) also includes a cam portion (116) pivotally coupled to the second connecting portion (113), wherein the cam portion (116) and at least one of the counter holds (112, 114) simultaneously secure the fixture (100) to the guide bar (208).