Hydraulic Flow; Forward Start And Acceleration (4Wdi); Forward Driving Ot Constant Speed (2Wd) - Honda CR-V 1997 Service Manual

Description
Hydraulic Flow
Forward Start and Acceleration (4WDI
During a forward start and forward acceleration, the dual pump system can engage four wheel drive.
If the front wheels spin faster than the rear wheels. the front oil pump spins faster than the rear oil pump. The front pump
draws fluid through check valve B and discharges it. Some of the discharged fluid is drawn in the by the rear oil pump.
The remaining fluid will pass through check valve E into the clutch piston. There, hydraulic pressure is regulated by two
orifices.
The regulated hydraulic pressure at the clutch piston pushes the plates and discs of the clutch together to form a
connec~
tion. The engaged clutch then passes driving force from the transfer assembly to the rear wheels, producing 4WD.
CLUTCH
ORIFICES OIL PUMP
REAR OIL PUMP
Forward Driving ot Constant Speed (2WD)
When driving forward at a constant speed (cru ising), the dual pump system functions in two wheel drive mode,
The rotation speed of the front and rear wheel s is the same, so the speed of the front and rear pumps is also the same.
Fluid discharged by th e front oil pump is drawn in by the rear oil pump and is circulated through the system , Because
there is no pressure built up at the clutch piston, the clutch does not engage, and the vehicle remains in 2WD (front wheel
drive),
FRONT OIL PUMP
"~M". UOL
PUMP
15-6