An engine capable of operating on compressed air includes one or more first pressurized air tanks, one or more second pressurized air tanks, a first motor including a casing, a transmission shaft disposed within the casing, a first motor entry port coupled to the one or more first pressurized air tanks for receiving compressed air, and a first motor exit port for exhausting the received compressed air, a second motor including a turbine housing, a crankshaft, and a turbine for rotating the crankshaft disposed within the turbine housing, a second motor entry port coupled to the one or more second pressurized air tanks for receiving compressed air, and a second motor exit port for exhausting the received compressed air, and an auto clutch for selectively coupling the transmission shaft to the crankshaft.

An electric vehicle (1) includes a charging circuit (11), a battery (12) and a driving electric motor (13), and an air compressor (14), an air storage tank (15), a turbine (16) and a generator (17). Air is compressed and stored in the air storage tank when the air compressor starts up. The air storage tank is provided with a switch valve, and under the control of the switch valve the air stored in the air storage tank is fed to the turbine. By means of providing an air compressor, an air storage tank, a turbine and a generator, and using air energy to generate power and using the battery to supply power in parallel, the continuous mileage of the electric vehicle is increased. In addition, the service life of the battery is prolonged, because the battery is used in a low depth of charge/low depth of discharge manner.

A hybrid system for a vehicle that can capture, convert, and store the kinetic energy of the vehicle slowing down the vehicle. The hybrid system includes an electric machine that can be switched between a motor mode and a generator mode, in the motor mode the electric machine can drive the vehicle using energy stored in a battery and in the generator mode the electric machine is driven by the kinetic energy of the vehicle. An air compressor is operably coupled with the electric machine, such as the electric machine drives the air compressor in the generator mode but not in the motor mode. Air compressed by the air compressor can be stored in a tank and the compressed air can be later converted to electrical energy by an air motor for charging the battery.

A hybrid system for a vehicle that can capture, convert, and store the kinetic energy of the vehicle slowing down the vehicle. The hybrid system includes an electric machine that can be switched between a motor mode and a generator mode, in the motor mode the electric machine can drive the vehicle using energy stored in a battery and in the generator mode the electric machine is driven by the kinetic energy of the vehicle. An air compressor is operably coupled with the electric machine, such as the electric machine drives the air compressor in the generator mode but not in the motor mode. Air compressed by the air compressor can be stored in a tank and the compressed air can be later converted to electrical energy by an air motor for charging the battery.

A power system including a pump drive having a first side and a second side, a motor that is operationally connected to the first side of the pump drive, an engine that is operationally connected to the second side of the pump drive, and a pump that is operationally connected to the pump drive. The preferred power system is adapted to power the item of equipment with either the motor or the engine. A method for providing power to an item of equipment by engaging the pump drive with the engine and/or the motor.

A hydrostatic drive has a hydrostatic pump (3) driven by a drive motor (2) and connected in a closed circuit with a hydrostatic motor (4). The closed circuit is formed by a first hydraulic connection (6a) and a second hydraulic connection (6b). Each of the hydraulic connections (6a, 6b) can form the high-pressure side or the low-pressure side of the closed circuit. A high pressure accumulator device (20) can be connected with the respective high-pressure side hydraulic connection (6a, 6b) and, simultaneously, the respective low-pressure side hydraulic connection (6b, 6a) can be connected with a hydraulic balancing device (30). A valve device (50) is provided for this simultaneous connection. The valve device (50) is a hydraulically controlled shuttle valve device (51) connected to the two hydraulic connections (6a, 6b), the high pressure accumulator device (20) and the hydraulic balancing device (30). The shuttle valve device (30) has a high pressure accumulator path (51a) and a hydraulic balancing path (51b), and is in communication with the two hydraulic connections (6a, 6b) of the closed circuit.

A drive system, in particular for a self-propelled construction machine, in particular a soil compactor, comprising an internal combustion engine comprising a drive unit, at least one hydraulic circuit with a hydraulic pump that can be driven by the drive unit, as well as a hydraulic-drive support unit with a hydraulic pump/motor assembly and at least one pressure fluid reservoir, wherein the hydraulic pump/motor assembly is or can be drivingly coupled with the drive unit or/and at least one hydraulic circuit, wherein the hydraulic pump/motor assembly can be operated in a charging operating mode by the drive unit or/and at least one hydraulic circuit as a pump to charge at least one pressure fluid reservoir and be operated in an drive support operating mode as a motor to provide a drive support torque for the hydraulic pump of at least one hydraulic circuit, characterized in that the hydraulic pump/motor assembly can be operated in a recirculation operating mode as a motor to start the drive unit.

A power system including a pump drive having a first side and a second side, a motor that is operationally connected to the first side of the pump drive, an engine that is operationally connected to the second side of the pump drive, and a pump that is operationally connected to the pump drive. The preferred power system is adapted to power the item of equipment with either the motor or the engine. A method for providing power to an item of equipment by engaging the pump drive with the engine and/or the motor.

Power systems, heat exchanger systems, electrical regeneration systems and air drag reduction systems for a wheeled vehicle are provided. The systems comprise a vehicle that includes a compressed air system and electrical system. The power and drag reduction system also comprises a plurality of pneumatic motors, one each connected to each wheel, the pneumatic motors using compressed air to drive each wheel and a plurality of electric motors, two each connected to each wheel, the electric motors using electric power to drive each wheel. Based on operator action, the vehicle is propelled by one of compressed air system operation and electrical system operation. Motors associated with each of the compressed air system and electrical system are attached to and drive each wheel separately. The compressed air system and electrical system operate separately and recharge battery systems.

Power systems, heat exchanger systems, electrical regeneration systems and air drag reduction systems for a wheeled vehicle are provided. The systems comprise a vehicle that includes a compressed air system and electrical system. The power and drag reduction system also comprises a plurality of pneumatic motors, one each connected to each wheel, the pneumatic motors using compressed air to drive each wheel and a plurality of electric motors, two each connected to each wheel, the electric motors using electric power to drive each wheel. Based on operator action, the vehicle is propelled by one of compressed air system operation and electrical system operation. Motors associated with each of the compressed air system and electrical system are attached to and drive each wheel separately. The compressed air system and electrical system operate separately and recharge battery systems.