Description And Operation
DESCRIPTION
The transmission oil pump (B) is driven by a chain and sprocket (A). The oil pump is located just behind the torque converter, inside of the pump housing. The pump is a double-stroke vane pump. The pump has dual chambers, two inlet and two outlet ports. The pump provides necessary lubrication and cooling throughout all phases of transmission operation.
| A | Stator Shaft |
| B | Pump Drive Chain |
| C | Pump Body |
| D | Brake A and Housing |
| E | Central Planetary Shaft for Gear 1 and 2 |
| F | Brake B Piston |
| G | Pump Drive Hub |
OPERATION
The Automatic Transmission Fluid (ATF) is sucked up from the sump underneath, which has the ATF filter in it, and is sent under pressure to the system delivery valve, to be then sent to the hydraulic valves in the mechatronics unit and to the converter pressure valve. The system delivery valve is managed through the control pressure from the EDS-SYS system pressure control solenoid valve.
| A - RETURN OF REDUNDANT OIL | D - SUMP |
| B - PRESSURE PIPE | E - SYSTEM PRESSURE VALVE |
| C - PUMP | F - INTAKE PIPE |
The excess oil is sent back to the ATF pump in the intake duct. This solution improves the noise, reducing the possibility of cavitation and increasing the pump efficiency by increasing the pressure on the intake side.
| A | Charging duct - surplus oil from the system delivery valve |
| B | Oil from the filter built into the sump |