Abstract: A heavy-duty vehicle includes a chassis, a wheel supporting the chassis, a drive system, a service brake, a drive system controller, and a service brake controller. The drive system includes a motor associated with the wheel. The motor is configured to propel the wheel and to apply a dynamic brake torque to the wheel. The service brake is associated with the wheel and configured to apply a service brake torque to the wheel. The drive system controller controls operation of the motor. The drive system controller selectively modulates the dynamic brake torque to the wheel based on traction conditions. The service brake controller controls operation of the service brake. The service brake controller may selectively modulate the service brake torque to the wheel based on the traction conditions. Modulation of the dynamic brake torque may be disabled during modulation of the service brake torque.

Abstract: This disclosure relates generally to fan shrouds for machine fans, and, more particularly, to the structure and design of double bell mouth shrouds and placement of double bell mouth shrouds relative to a machine fan. In some examples, a fan shroud encircling a circular fan having a plurality of fan blades can be provided. Some example fan shrouds can include an inlet adapted to receive air and an outlet adapted to outlet air. The inlet can include an inlet radius, and the outlet can include an outlet radius. In some examples, the outlet radius can each be about 10% of the fan diameter.

Abstract: A climate control system is provided for use with a machine. The climate control system may have a compressor electrically powered to compress refrigerant, a condenser configured to dissipate heat from compressed refrigerant, and an evaporator configured to dissipate heat from chilled refrigerant to air directed into a cabin. The climate control system may also have at least one blower configured to selectively direct ambient air, cabin air, or a combination of ambient and cabin air through the evaporator, and a controller in communication with the engine, the compressor, and the at least one blower. The controller may be configured to determine a status of an engine, to determine existence of an operator in the cabin, and to selectively cause the at least one blower to direct only cabin air through the evaporator into the cabin when the engine is shut down and the operator is present in the cabin.

Abstract: This disclosure relates generally to fan shrouds for machine fans, and, more particularly, to the structure and design of double bell mouth shrouds and placement of double bell mouth shrouds relative to a machine fan. In some examples, a fan shroud encircling a circular fan having a plurality of fan blades can be provided. Some example fan shrouds can include an inlet adapted to receive air and an outlet adapted to outlet air. The inlet can include an inlet radius, and the outlet can include an outlet radius. In some examples, the outlet radius can each be about 10% of the fan diameter.