Denso 4D56 - Construction; Operation

Operation Section
1
–
18
7.4 Construction
7.5 Operation
z The TWV (Two-Way Valve) solenoid valve opens and closes the outlet orifice to control both the pressure in the control chamber, and
the start and end of injection.
(1) Non injection
• When no current is supplied to the solenoid, the spring force is stronger than the hydraulic pressure in the control chamber. Thus, the
Q001240E
QR Codes
30 Alphanumeric Figures
Pressurized Fuel
(from Rail)
Seat
Leak Passage
Multiple Hole Filter
Pressurized Fuel
Command Piston
Nozzle Spring
Pressure Pin
Nozzle Needle
Control Chamber