Normal Braking Hydraulic Circuit, Solenoid Valve, And Shuttle Valve Function (Abs With Traction Control)
| 1 - OUTLET VALVE |
| 2 - PUMP PISTON |
| 3 - PUMP/MOTOR (OFF) |
| 4 - SUCTION VALVE |
| 5 - LOW PRESSURE ACCUMULATOR |
| 6 - NORMALLY CLOSED VALVE (OFF) |
| 7 - TO WHEEL BRAKE |
| 8 - NORMALLY OPEN VALVE (OFF) |
| 9 - NORMALLY OPEN TC (ASR) VALVE (OFF) |
| 10 - FROM MASTER CYLINDER |
| 11 - HYDRAULIC SHUTTLE VALVE |
| 12 - MASTER CYLINDER PRESSURE |
| 13 - NOISE DAMPER CHAMBER |
The hydraulic diagram shows a vehicle with traction control in the normal braking mode. See Fig 1. The diagram shows no wheel spin or slip occurring relative to the speed of the vehicle. The driver is applying the brake pedal which builds pressure in the brake hydraulic system to engage the brakes and stop the vehicle. The hydraulic shuttle valve closes with every brake pedal application so pressure is not created at the inlet to the pump/motor.