The demands for engine cooling systems are constantly increasing. Today more than ever, new solutions aim to have a positive impact on fuel consumption, emissions, driving comfort and driving safety via heat transfer.
Coolant radiator
Dissipating the heat in commercial-vehicle and high-power passenger car engines requires not only high-capacity radiators, but fans (i.e. Visco® fan) and fan drives capable of providing an efficient supply of cooling air as well.
Controlling the cooling air flows as needed reduces fuel consumption and causes less impact on the environment, including minimizing noise levels and maximizing efficiency.
The Visco® fan drive is designed to form a frictional connection to the fan wheel and to influence its speed, dependent on the temperature.
If no cooling air is required, the Visco® fan drive shuts down and rotates at a lower speed. Cooling on demand improves the coolant temperature level, engine noise level and fuel consumption.
Using oil coolers to cool engine oils that are under a high thermal load, i.e. ensuring a near constant temperature spectrum, has significant advantages. Particular benefits include longer oil change intervals and improved engine longevity.
Hydrodynamic retarders are used in commercial vehicles as wear-free hydrodynamic brakes to support the actual braking system. As a part made exclusively of aluminum or steel, the oil cooler is directly flange-mounted to the retarder, and transfers the kinetic energy converted to heat, to the coolant circuit of the vehicle.
The cabin heat exchanger is located in the vehicle cabin beneath the dashboard.
The air flow produced by the cabin fan is routed through the cabin heat exchanger, which has coolant flowing through it. The heated air is then discharged into the vehicle cabin, to achieve the required temperatures.
On account of the high efficiency of modern, direct injection engines (e.g. TDI), dissipated heat is no longer sufficient for heating up the inside of the vehicle quickly on cold days.
Auxiliary electric heaters, which are installed in the direction of travel in front of the heat exchanger, make it possible to heat up the vehicle cabin more quickly. They are made up of several temperature-dependent, electrically controlled resistors. Without delay, energy is taken from the vehicle electric system and directly transferred to the passenger compartment as heat via the blower air flow.
The water pumps are often powered mechanically, and transport the coolant through the circuit and build up the system pressure. More often than not, the water pumps are powered mechanically with the use of a belt. Behr Hella Service offers easy-to-install complete kits including water pump (including O-rings or other seals), toothed belts, and, if needed, tension, deflection and guide rollers, seals and dampers.
Water pumps and kits from Behr Hella Service fulfill the most stringent requirements. Our thermal management expertise sets true standards for functionality and fit.
