Carburetor and method of operating the same
First Claim
1. A carburetor comprising:
- an intake channel;
a throttle element movably mounted in said intake channel;
a choke element movably mounted in said intake channel upstream of said throttle element;
said choke element being displaceable between an operating position wherein said choke element is open and at least one start position wherein said choke element reduces the cross section of said intake channel relative to the cross section thereof in said operating position;
a first fuel path for supplying fuel to said intake channel in dependence upon the underpressure present in said intake channel;
a first valve mounted in said first fuel path for controlling the quantity of the supplied fuel;
a second fuel path defining a bypass line to said first controllable valve; and
, a second valve mounted in said second fuel path.
1 Assignment
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Accused Products
Abstract
A carburetor (1, 51) has an intake channel (2) wherein a throttle element and a choke element are arranged with the choke element being upstream of the throttle element. The choke element is displaceable between an operating position (8) and at least one starting position (9). A first fuel path is provided which supplies fuel to the intake channel section (2) in dependence upon the underpressure present therein. A first controllable valve (20) for controlling the supplied fuel quantity is mounted in the first fuel path. In order to achieve an adapted fuel supply in different operating states, a second fuel path is provided which defines a bypass line to the first valve (20). A second valve (44, 54) is mounted in the second fuel path. A method for operating the carburetor (1, 51) provides that the second valve (44, 54) is actuated in dependence upon at least one operating parameter of the carburetor (1, 51).
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Citations
25 Claims
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1. A carburetor comprising:
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an intake channel; a throttle element movably mounted in said intake channel; a choke element movably mounted in said intake channel upstream of said throttle element; said choke element being displaceable between an operating position wherein said choke element is open and at least one start position wherein said choke element reduces the cross section of said intake channel relative to the cross section thereof in said operating position; a first fuel path for supplying fuel to said intake channel in dependence upon the underpressure present in said intake channel; a first valve mounted in said first fuel path for controlling the quantity of the supplied fuel; a second fuel path defining a bypass line to said first controllable valve; and
, a second valve mounted in said second fuel path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for operating a carburetor for an internal combustion engine;
- the carburetor including;
an intake channel;
a throttle element pivotally mounted in said intake channel;
a choke element pivotally mounted in said intake channel upstream of said throttle element;
said choke element being displaceable between an operating position wherein said choke element is open and at least one start position wherein said choke element reduces the cross section of said intake channel relative to the cross section thereof in said operating position;
a first fuel path for supplying fuel to said intake channel in dependence upon the underpressure present in said intake channel; and
, a first valve mounted in said first fuel path for controlling the quantity of the supplied fuel;
the method comprising the steps of;displacing said choke element into said one start position for starting said engine; providing a second fuel path defining a bypass line to said first valve; arranging a second valve in said second fuel path; and
, actuating said second valve in dependence upon at least one operating parameter of said carburetor. - View Dependent Claims (23, 24, 25)
- the carburetor including;
Specification