Cub Cadet 8454 - Manual (Page 41)

ENGINE
2-19 D569-W02 May-2003
569W235A
569W236A
(1) Nozzle Holder Ass’y (6) Nozzle Body
(2) Adjusting Washer (7) Needle Valve
(3) Nozzle Spring (8) Heat Seal
(4) Push Rod (9) Packing
(5) Retaining Nut
(1) Start Spring (8) Governor Lever
(2) Governor Spring 1 (9) Fuel Camshaft
(3) Governor Spring 2 (10) Governor Ball Case
(4) Fork Lever 1 (11) Steel Ball
(5) Fork Lever 2 (12) Governor Sleeve
(6) Fork Lever Shaft (13) Steel Ball
(7) Fork Lever Holder
F. GOVERNOR AND IDLE COMPENSATING
a . Disassembled View
The governor serves to keep engine speed constant by
automatically adjusting the amount of fuel supplied to
the engine according to changes in the load. The en-
gine employs an all-speed governor which is controlled
by the centrifugal force of the steel ball (13) weights,
produced by rotation of the fuel camshaft (9), and ten-
sion of the governor spring 1 (2) and 2 (3) are balanced.
E. FUEL INJECTION NOZZLE
The nozzle is a throttle-type. It features low fuel con-
sumption and works well with DAEDONG combustion
chamber. The nozzle valve opening pressure is about
13.7 to 14.7 MPa (140 to 150 kgf/cm
2 , 1,991 to 2,134
psi), the pressure overcomes the counterforce of nozzle
valve spring, and push the valve up instantly, the fuel is
then injected in a proper quantity into the swirling air in
the combustion chamber for combustion. Addition or
reduction of adjusting shims can adjust the opening
pressure. A washer of 0.1 mm corresponds to 980 kPa
(10 kgf/cm
2 , 142 psi) change in opening pressure. The
heat seal is employed to improve the durability and
reliability of the nozzle.