Abstract: An auxiliary power unit having internal combustion engine(s) in driving engagement with an engine shaft, a generator having a generator shaft drivingly engaged to the engine shaft, a compressor having an outlet in communication with the internal combustion engine inlet, and a turbine having an inlet in communication with the internal combustion engine outlet. The turbine may be a first stage turbine, and the assembly may include a second stage turbine having an inlet in communication with the first stage turbine outlet. A method of providing electrical power to an aircraft is also discussed.

Abstract: A coolant circuit for an internal combustion engine includes: a coolant pump; at least one coolant line; a radiator; and a coolant cavity delimited in the internal combustion engine. The coolant pump, the coolant line, the radiator and the coolant cavity are filled with a coolant. One or more sensors, configured to monitor the coolant concentration, are fixedly and permanently arranged in and/or on the coolant circuit.

Abstract: A method for controlling a water pump of a vehicle moving a coolant circulating through a cooling load generating heat and a radiator includes calculating a rotation speed command based on a control reference temperature of the coolant. A water pump suction pressure is set and compared with a preset control reference pressure to control the rotation speed command. A system for controlling the water pump includes a first temperature sensor for detecting a temperature of a coolant exhausted from the cooling load and a second temperature sensor for detecting a temperature of the coolant to be supplied to the cooling load. A water pump pressure sensor detects a water pump suction pressure, and a water pump driver drives the water pump. A controller controls the water pump driver based on signals received from the first temperature sensor, the second temperature sensor, and the water pump pressure sensor.

Abstract: A modular cooling unit is configured with a heat exchanger having a tunnel port extending at least part way through the core of the heat exchanger. A cooling fan motor is mounted within the tunnel port, so as to minimize the overall length of the cooling unit.

Abstract: A method and cruise control system for controlling a vehicle cruise control includes driving the vehicle with the cruise control active and set to maintain a vehicle set target speed, and registering a current vehicle condition, which includes at least a current vehicle position, a currently engaged gear ratio, available gear ratios, current vehicle speed, available maximum propulsion torque and road topography of coming travelling road comprising a next coming uphill slope. Based on the current vehicle condition a downshift is predicted at a coming vehicle position in the coming uphill slope due to vehicle speed decrease and at least one activity is selected which results in that the downshift can be postponed or avoided. The cruise control is controlled according to the selected activity in order to postpone or avoid, for example a downshift from a direct gear and thereby saves fuel.

Abstract: A valve arrangement for venting a coolant circuit of an internal combustion engine having several subcircuits includes a valve which is in fluid communication with a primary vent line extending from one of the subcircuits. At least one secondary vent line is in fluid communication with the valve and extends from another one of the subcircuits. The primary and secondary vent lines are connectable to a shared third vent line which feeds into a compensating reservoir arranged at a geodetically highest point in the coolant circuit. The valve is constructed to establish a continuous fluid communication of the primary vent line with the compensating reservoir via the third vent line and to establish a fluid communication of the secondary vent line with the compensating reservoir via the third vent line only in the presence of air bubbles in the secondary vent line.

Abstract: A thermal management system is disclosed for a hybrid vehicle having an electrochemical power source (battery/fuel cell) and an internal combustion engine. In cooling mode, the system will flow liquid refrigerant over an evaporator attached to the battery/fuel cell, a two-phase mixture will then flow to the condenser where the heat is dissipated to ambient. In cold conditions where the battery/fuel cell needs to be warmed, the system will pick up heat from the engine and pump the warm fluid back to the battery/fuel cell until its optimal operating temperature is reached.

Abstract: A water over air intercooler for use in a reciprocating air compressor includes a central core unit having an interior which contains a plurality of air passage tubes, a cooling water inlet and at least one cooling water outlet. A first manifold has at least one air inlet and is in communication with the plurality of air passage tubes so as to receive air from the at least one air inlet and direct the air to the plurality of air passage tubes. A second manifold has an air outlet and is in communication with the plurality of air passage tubes so as to receive air from the plurality of finned air passage tubes and direct the air to the at least one air outlet. The central core unit, the first manifold and the second manifold are integrally connected by welding to form a single piece.

Abstract: A cooling system for a work vehicle is disclosed that includes first and second heat exchangers disposed one above the other to create two discrete flow paths. The upper heat exchanger is an engine water cooler and the lower heat exchanger may be an intercooler, an oil cooler or a refrigerant condenser. The lower heat exchanger is disposed forward of the upper heat exchanger. Additional heat exchangers may be positioned in front of the first and second heat exchangers to provide additional cooling. The first and second heat exchanger may be cross-flow heat exchangers conducting the fluid to be cooled laterally through the core of the heat exchanger.

Abstract: A cooling system for an internal combustion engine in which bubbles are not transferred to the water pump, and thereby the efficiency of the water pump is maintained. The interior of a water outlet mounted on a cylinder head is divided by a partition wall to form a feeding chamber to feed the coolant introduced from the cylinder head to a first path provided with a radiator, and a receiving chamber forming a second path to receive the coolant returned from a heater core. Between the receiving chamber and the feeding chamber is a channel making one or both chambers communicate with the other. As a result, bubbles in the coolant running through the second path are introduced into the feeding chamber through the channel and removed from the radiator.

Abstract: A vehicle engine cooling system includes a primary cooling circuit having a primary radiator and a coolant pump. A secondary cooling circuit includes a secondary radiator, an EGR cooler, and a liquid/air charge air pre-cooler receiving engine inlet air from a turbocharger compressor. The coolant pump circulates coolant through the EGR cooler, through the charge air pre-cooler, and through the primary and secondary radiators. A fan blows cooling air through the primary and secondary radiators. The secondary radiator is downstream of the primary radiator in the fan airflow. The cooling system also includes an air-to-air charge air cooler which receives engine inlet air from the liquid/air charge air pre-cooler. The air-to-air charge air cooler is upstream of the primary radiator with respect to flow of cooling air. The cooling system also includes an auxiliary engine fluid cooler which is located between the air-to-air charge air cooler and the primary radiator.

Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.

Abstract: An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach.