Abstract A carburetor system for combustion engines having a relatively long intake duct is provided with a rating system which is arranged separate from the main nozzle system. This idling system is located near the intake of the combustion engine. Under these circumstances, the formation of the idling mixture takes place before its introduction into the engine intake so that there is no possibility of mixture separation. In one proposed embodiment, a check valve is provided for preventing backflow of fuel or fuel-air mixture to affect the idler. In another embodiment, the idling system together with the throttling flap is arranged in a flange interposed between the engine and intake duct. The air nozzle of this idling system is connected to the intake duct by a passage located upstream from the throttling flap. In a further embodiment, the idling system is arranged in the engine housing or the cylinder head itself. In this regard, the idling system is connected to the inlet passage by a line thereby providing for a short route for the idling mixture to the intake chamber of the combustion engine.
In a carburetor system for combustion engines of the rotary piston engine type, comprising a carburetor having a main nozzle system and an idling system, the carburetor being connected to the inlet passage of the combustion engine and communicating with the intake chamber thereof by a relatively long intake duct having an upstream and downstream end, the idling system including fuel-air mixing means being arranged adjacent the downstream end of the intake duct a short distance ahead of the opening of the idling mixture line into the inlet passage close to the intake chamber of the engine so that idling fuel is mixed with idling air at a short distance from the inlet passage thereby minimizing air-fuel mixture separation in the idling system and accordingly assure uniform idling.
Claim 2
Dependent Claim
128 words
In a carburetor system for combustion engines of the rotary piston engine type, comprising a carburetor having a main nozzle system and an idling system, the carburetor being connected to the inlet passage of the combustion engine and communicating with the intake chamber thereof by a relatively long intake duct having an upstream and downstream end, the idling system including fuel-air mixing means being arranged adjacent the downstream end of the intake duct a short distance ahead of the opening of the idling mixture line into the inlet passage close to the intake chamber of the engine so that idling fuel is mixed with idling air at a short distance from the inlet passage thereby minimizing air-fuel mixture separation in the idling system and accordingly assure uniform idling.
Claim 3
Dependent Claim
21 words
Carburetor system according to claim 1 wherein the idling system is arranged in a flange between the engine and intake duct.
Claim 4
Dependent Claim
16 words
Carburetor system according to claim 1 wherein a throttling flap is arranged in the intake duct.
Claim 5
Dependent Claim
21 words
Carburetor system according to claim 3 wherein the throttling flap is arranged in a flange between the engine and intake duct.
Claim 6
Dependent Claim
30 words
Carburetor system according to claim 3 wherein the air nozzle of the idling system communicates by a passage with the intake duct at a point upstream of the throttling flap.
Claim 7
Dependent Claim
25 words
Carburetor system according to claim 1 wherein the fuel nozzle of the idling system is connected to the float chamber of the main nozzle system.
Claim 8
Dependent Claim
22 words
Carburetor system according to claim 1 wherein an independent idling inlet passage is provided with which the idling system is in communication.
Claim 9
Dependent Claim
24 words
Carburetor system according to claim 1 wherein a check valve opening in the direction of flow is provided in one of the idling lines.