Honda CB350 CL350 [66/219] Carburetor 55

Содержание

Похожие устройства

3 6 CARBURETOR 55 3 6 CARBURETOR The function of the carburetor is to supply fuel to the engine is already well known however the outstanding feature of the CV carburetor is a constant pressure single barrel compound carburetor brought about by the automatic changing of the venturi area by the vacuum pressure of the engine Each cylinder is equipped with a single carburetor of this type which provides the following advantages to engines having a broad speed range and a high power output 1 Because of the variable venturi design the transition between the first and second stage is exceptionally smooth 2 The construction is very simple due to the single barrel feature 3 Excellent acceleration and good economy is assured 1 Air flow Fig 3 1 18 The air which passes the air cleaner flows through the air inlet venturi throttle valve and enters the cylinder through the inlet port The vacuum piston is protruding into the venturi area and by the action of the vacuum piston spring 5 the venturi is held toward the closing side When there is only a small amount of air being taken into the engine the vacuum piston is in the lowered position forming the primary venturi The air velocity in the venturi area is maintained constant affording good atomization of the fuel With an increase in the air flow the vacuum pressure in the venturi increases causing the vacuum piston to rise due to the pressure j applied to the top of the piston The venturi area is increased by the amount of the rise of the piston which is in proportion to the vacuum pressure When the engine reaches maximum rpm the vacuum piston reaches the top as shown in Fig 3 121 and becomes the secondary venturi to provide sufficient venturi area for maximum power output A a Ai d 4 f W AAAA A W II Fuel flow The carburetor known as double nozzle type is divided into slow primary and the secondary systems a Slow system The fuel enters the primary main jet where it is metered and mixed with drawn into the engine from the pilot throttle valve The fuel flow from Fig 3 118 119 and flows through passage to the slow jet the air from the slow air jet The fuel mixture is outlet and bypass located in the vicinity of the the pilot outlet is controlled by the pilot screw i b Primary system Part of the fuel which enters the primary main jet flows to the slow speed system described above but major portion of the fuel is mixed with the air from the primary air jet within the main nozzle and is discharged from the main nozzle to the inside of the venturi c Secondary system The fuel which enters the secondary main jet is mixed with the air from the secondary air jet within the needle jet holder and is discharged however while the vacuum piston is operating the air flow hardly changes and therefore the pressure in the vicintity of all the jets are constant and the result is that fuel flow does not increase in the same AW proportion to the air volume To correct this condition a jet needle has been instilfed A 1 in the secondary system to regulate the fuel flow JS Si i A1 j I

Скачать
Случайные обсуждения

Ответы 2

Как снять сиденье
1 месяц назад