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US 6,722,638 B2Granted
Control system for choke valve of carburetor
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsHiroaki Kojima, Hiroshi Moriyama, Ryuhei Tamamoto
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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsHiroaki Kojima, Hiroshi Moriyama, Ryuhei Tamamoto
Estimating the term…
A choke valve control system includes a choke-operating lever for opening and closing a choke valve of a carburetor, a choke spring for biasing the valve in an opening direction, and a damper for controlling the opening motion of the valve to a lower speed, when the choke valve is opened from its fully closed position by a biasing force of the choke spring. The choke-operating lever, the choke spring and the damper are connected to the choke valve of the carburetor. In this choke valve control system, the damper includes a damper housing, a rotor, and a damper oil which is accommodated in a sealed manner in the damper housing and applies a viscosity resistance to the rotation of the rotor, which resistance increases as the viscosity increases with decreasing temperature. Thus, the time required for opening the choke valve can be controlled in accordance with the level of the environmental temperature of an engine, thereby providing the stabilization of the warming operation of the engine and a reduction in fuel consumption.
A control system for a choke valve of a carburetor, including a choke-operating lever for opening and closing the choke valve of the carburetor, a choke spring for biasing said valve in an opening direction, and a damper for controlling opening motion to a lower speed, when said choke valve is opened from a fully closed position by a biasing force of said choke spring, said choke-operating lever, said choke spring and the damper being connected to said choke valve of said carburetor,
A control system for a choke valve of a carburetor in a power working machine including an engine which has a cooling fan mounted at an upper end of a crankshaft disposed vertically, a working device connected to a lower end of said crankshaft, and an engine cover which has a cooling-air intake port opposed to the cooling fan and covers an upper surface of the engine so that cooling air drawn through the cooling-air intake port by the cooling fan is guided to the engine,
Dependencies are inferred from the claim text.