The comprehensive range of hydrostatic fan drive systems from Rexroth offers a cost-effective and energy-efficient solution for cooling engines and exhaust systems in rail vehicles. By continuously adjusting cooling effort to match changing requirements, the new systems greatly reduce energy use compared with traditional solutions, and they also occupy up to 20% less space in the engine compartment.
Rexroth hydrostatic fan drive cooling systems provide designers with a convenient and dependable way of optimising engine and combustion temperatures, which is an essential pre-requisite for satisfying today’s increasingly stringent emission requirements.
With higher exhaust gas standards such as Euro 6, Tier 4, environmental sensitivity becomes more important with higher exhuast gas standards. Radiator cooling capacity may need to rise by up to 40%, resulting in size increases of 20%. Rexroth fan drives that are applied to engines and exhaust systems compensate for this and reduce noise pollution, reducing the impact on the environment.
The robust BODAS RC controller is a flexible programmable vehicle PLC. It is used in mobile applications with hydrostatic transmissions to achieve maxmimum results from the hydraulics through sophisticated closed loop controls.
Controlled hydrostatic fan drives are superior to conventional units driven with V-belts because variable control of fan speed reduces fuel consumption and reduces exhausts and noise.
Components are compact with optional versatile mounting locations to suit application space and to provide a highly reliable cooling system. This is important for rail locomotives where intermittent reversing of the fan cleans the radiator and brings back cooling performance in dusty or dirty environments.
Rexroth provides all the components to achieve optimum temperature control of engines by use of highly sophisticated sensors. The BODAS RC controller ensures that the fan is always operating at the right speed from when the engine is cold, to ensure minimum time in the inefficient warm up phase, to maximum speed when the engine is operating at full power. In short, keeping the engine temperature and efficiency at optimum, irrespective of engine the speed.
The main components are a wide range of pumps, motors, sensors, valve modules and the controller and software, all perfectly matched and available from Rexroth.
The controller can be connected to the CAN bus of the engine thus making additional sensors unnecessary. There are options on drives, pumps and number of sensors etc to suit the particular vehicle and Rexroth will work with you to ensure the best most economical solution is chosen.
BODAS RC controllers are used for quickly and affordably creating a mobile hydraulic complete solution without time consuming and expensive hardware development providing multifunctional inputs and outputs for the control of the electro-hydraulic components in the machine and can be used for other vehicle features such as lights, instrumentation and power supplies.
In complex applications, multiple controllers can be connected via the CAN bus to form a network. The number of inputs and outputs can be extended quickly and economically and safety features are integrated in the standard version to enable simple and reliable machine diagnostics. Matched to the RC controllers, the BODAS software modules offer preconfigured application solutions for drive and working hydraulics