Abstract:
The cap has an adjustment prevention device (330) and a guiding nose. A portion of a set screw (200) is surrounded by the cap for positive locking. The screw is rotated relative to the cap to attach the cap in an installation position. The cap is locked to the screw in another installation position. Transition area between a screw head and a screw needle extends in a ring shape around an outer circumference of the needle. Independent claims are also included for the following: (A) an internal combustion engine comprising a carburetor (B) a method for adjusting fuel flow through a carburetor
Abstract:
PROBLEM TO BE SOLVED: To provide an adjustment locking device for an adjusting screw of a carburetor, which is disabled to apply, to the adjusting screw, an adjusting moment larger than a restricting rotation moment to break the adjusting locking device.SOLUTION: In a cap (20), there is formed a through hole (40) for making an access possible to engaging holes (14, 15) formed in heads (12, 13) of adjusting screws (10, 11). The through hole (40) is restricted in its shape and open width (D) by a metallic material. In order to restrict the maximum allowable adjusting moment, the engaging holes (14, 15) formed in the heads (12, 13) of the adjusting screws (10, 11) are made flexible in the points of their shapes and/or open widths.
Abstract:
PROBLEM TO BE SOLVED: To provide a two-stroke engine having improved rotational behavior in idling.SOLUTION: A throttle valve (22) is arranged, in an idling position, adjacent to an upstream inlet (60) in a secondary passage (37). The throttle valve (22) has an opening (59). The opening (59) is arranged, in the idling position of the throttle valve (22), in the region of the inlet (60) and connects the secondary passage (37) with a region of an intake passage (61), located upstream of the throttle valve (22).
Abstract:
Engine control assemblies for use with internal combustion engines, engines having such assemblies, and methods for operating such engines and assemblies are disclosed. In one example embodiment of an engine control assembly encompassed herein, the assembly includes a lever structure configured to rotate to any of a plurality of positions ranging from a first position to a second position. The assembly also includes at least one linking structure configured to allow rotational movement of the lever structure to influence at least indirectly an engine choking operation, where the at least one linking structure including a rod (250) that includes a bend portion (256) along its length, and the lever structure includes a formation (254) with an orifice (252) through which the rod (250) extends. The rod (250) and formation (254) are configured so that at least some other rotational movement of the lever structure does not cause any corresponding movement of the choke actuation input structure.
Abstract:
Engine control assemblies for use with internal combustion engines, engines having such assemblies, and methods for operating such engines and assemblies are disclosed. In one example embodiment of an engine control assembly encompassed herein, the assembly includes a lever structure configured to rotate to any of a plurality of positions ranging from a first position to a second position. The assembly also includes at least one linking structure configured to allow rotational movement of the lever structure to influence at least indirectly an engine choking operation, where the at least one linking structure including a rod (250) that includes a bend portion (256) along its length, and the lever structure includes a formation (254) with an orifice (252) through which the rod (250) extends. The rod (250) and formation (254) are configured so that at least some other rotational movement of the lever structure does not cause any corresponding movement of the choke actuation input structure.
Abstract:
An intake control device for an internal combustion engine comprises, in an intake passage (2) downstream of a throttle valve (5), a secondary valve (6). Said secondary valve is bypassed by a low speed air passage (7) of small cross-section. Within said low speed air passage, an intake opening-closing valve (9) is provided which is to be closed while the intake valve (3) of the internal combustion engine is open. The intake opening-closing valve (9) is controlled via an engine crankshaft.
Abstract:
An intake control device for an internal combustion engine comprises, in an intake passage (2) downstream of a throttle valve (5), a secondary valve (6). Said secondary valve is bypassed by a low speed air passage (7) of small cross-section. Within said low speed air passage, an intake opening-closing valve (9) is provided which is to be closed while the intake valve (3) of the internal combustion engine is open. The intake opening-closing valve (9) is controlled via an engine crankshaft.
Abstract:
A fuel supply device for carburetors in which a first level sensor (10) for maintaining a reference fuel liquid level in a fuel chamber (7) is provided separate from the fuel chamber; a second level sensor (20) used to maintain properly a fuel flow rate in a slow operation zone (6) and a third level sensor (16) used to maintain properly a fuel flow rate in a main operation zone (1) are arranged close by the first level sensor; and a mixture with a proper air-fuel ratio can always be supplied to an engine even if the fuel liquid level in the fuel chamber fluctuates and the entire carburetor inclines, without being affected thereby.