An additional advantage consists in the ability to install electric cooling pumps individually and outside of the engine. They are relatively light and maintenance-free, thanks to the brushless installation. At an operating voltage of 12-360 volts, it currently reaches outputs of 15 to 1000 watts. Coolants reduce the temperature of the coolant pump's electric motor. A pulse width-modulated (PWM) signal control makes flexible adjustment possible. This, in turn, enables controlling the transported volume according to the actual needs and independent of engine rotation, thus allowing keeping the cooling temperature constant as required by the respective system. Thanks to their inclusion in the wiring system electronics, electric coolant pumps can also be diagnosed. Depending on the drive type (internal combustion engine, hybrid, electric) and the system, one or even several pumps can be installed in the vehicle.
Electrical coolant pumps have many areas of application:
- Engine cooling
- Charge air cooling
- Cooling of the exhaust gas recirculation
- Drive and battery cooling in hybrid and electric vehicles
- Transmission cooling
- Cooling of diverse power take-offs