US 2008/0246170 A1 · CARBURETOR START-STOP MECHANISM

Abstract

The present invention relates to a carburetor of an internal combustion engine having a manually activated start position. The carburetor comprises at least a choke valve and a throttle valve both located in the carburetor's main air passage which are able to move between an open and a closed position, each valve having at least one respective lever that cooperates during the manual activation to give at least one start position of the choke and throttle valves. The carburetor further usually comprises at least one thermally responsive member arranged to affect the start position. Further a handle is arranged to provide a two stage draw—lift motion to attain the start position.

Claims20

Dependent claims

A carburetor of an internal combustion engine having a manually activated start position, said carburetor comprising:

a choke valve and a throttle valve both located in the carburetor's main air passage and both being able to move between an open and a closed position, each valve having a respective lever, choke valve lever and throttle valve lever that cooperates during the manual activation to give a start position of the choke and throttle valve;
at least one thermally responsive member, wherein said member influences the air through-flow resistance in said passage when the choke is made active by arranging the member so that at certain temperatures said member affects said start position by restricting said movement of said choke valve towards the closed position.

A method for adjusting a choke actuator of an internal combustion engine the method comprising the steps of:

controlling the choke valve of a carburetor of the engine by pivoting the choke actuator, the choke valve cooperating with a throttle valve through at least one respective lever, wherein a base position of opened choke valve and a closed throttle valve corresponds to the choke actuator being in a first choke actuator position, and a first start position of closed choke valve and a partly opened throttle valve corresponds to the choke actuator being in second choke actuator position, in the first start position the choke valve and the throttle valve are interlocked through cooperation of the levers;
actuating the choke according to the followings steps in order for the throttle and choke valves to move from the base position to the first start position:
a) pulling an choke actuator handle of the choke actuator outwards;
b) releasing a locking sprint, the locking sprint in locked position preventing pivoting in a first rotational direction (53);
and
c) pushing the choke actuator to the second choke actuator position thereby closing the choke valve which closing choke valve interacts with the throttle valve to interlock providing the first start position.

3 more elements

Dependencies are inferred from the claim text.

Carburetor start-stop mechanism

Life of this patent

Carburetor start-stop mechanism

Life of this patent

Abstract

Claims20