252 results about "Hybrid fuel" patented technology

A fuel cell system that employs a super capacitor and battery electrically coupled in series with each other and in parallel with a fuel cell stack on a power bus line. As the voltage on the power bus line changes over the operating requirements of the system, the super capacitor is charged and discharged over a relatively large voltage swing, such as an 85% SOC swing. The super capacitor equalizes or voltage matches the voltage variation on the power bus line as set by the stack voltage to the voltage of the battery. Therefore, the battery, while providing the majority of the energy and power during charge and discharge, has a relatively small defined SOC swing, which acts to maintain the battery life. The system can also include a diode electrically coupled in parallel with the super capacitor that provides reverse voltage protection and electrical power by-pass.

An apparatus and accompanying method for controlling a fuel cell power system having a fuel cell stack with a connected energy storage medium. A voltage monitoring circuit is connected to the individual fuel cells forming a fuel cell stack. A regulating circuit receives signals from the voltage monitoring circuit and outputs a control signal to a DC-DC converter connected between the fuel cell stack and an output bus and energy storage medium. The regulating circuit controls the DC-DC converter voltage output to a maximum power that the fuel cell stack can provide.

An ultracapacitor based power storage device suitable for use in hybrid fuel cell systems and other power systems includes circuitry for simulating the response of a battery. A voltage current limiting circuit may be employed with a variety of electrical storage devices, for example, ultracapacitors and batteries.

Combined aircraft hybrid fuel cell auxiliary power unit and environmental control system and methods are disclosed. In one embodiment, an auxiliary power unit includes a fuel cell component which chemically converts combustible fuel into electrical energy. Unutilized fuel emitted by the fuel cell component is combusted by a burner to generate heated gas. The heated gas is received by and drives a turbine, which in turn drives a drive shaft. A compressor, coupled to the drive shaft, compresses a source of oxidizing gas for supplying compressed oxidizing gas to the fuel cell component and to an environmental control system. A heat exchanger controls the temperature of the pressurized air leaving the environmental control system to provide the cabin air supply. Finally, a generator is coupled to the drive shaft to be driven by the turbines to generate additional electrical energy.

A hybrid fuel cell system having a fuel cell and a heat engine having an expansion cycle and a compressor cycle and which is further adapted to include a bypass assembly for segmenting expanded oxidant supply gas from the expansion cycle of the heat engine into a first expanded oxidant supply gas portion and a second expanded gas portion and in which the first expanded oxidant supply gas portion is used for the fuel cell and the second expanded gas portion bypassed around the fuel cell.

A service station is provided with a plurality of vehicle servicing islands including liquid fuel blending pumps for dispensing and blending fuel components from underground storage tanks for refueling standard gasoline engine driven vehicles, standard diesel engine vehicles, vehicles with engines requiring dual fuels, vehicles with HCCL engines require low octane gasoline blended with standard diesel fuel, and fuel cell powered vehicles having onboard reformers. Other service islands include pumps for dispensing compressed hydrogen to fuel cell powered vehicles that do not include onboard reformers. In addition, service islands are provided for recharging the batteries of pure electric powered vehicles. A service station is further provided with a wireless communicator for receiving signals indicative of a vehicle's fuel requirements and transmitting signals to direct the vehicle to a service island capable of servicing the vehicle.

A hybrid fuel cell / battery including at least one cathode, at least one anode, and at least one auxiliary electrode. The auxiliary electrode works in combination with the anode to provide a current as a rechargeable battery while the anode and cathode work in combination to provide an electrical current as a fuel cell. The cathode and the auxiliary electrode may operate alone or in tandem to provide an electrical current.

A self-regulating system for reducing concentration of hydrocarbon vapor in a container may be performed by introducing air into the container and extracting a mixture of air and vapor from the container. The extracted mixture may be compressed with a compressor to produce a flow of compressed mixture of air and vapor. The compressed mixture may be passed through an oxidation reactor that may be either catalytic or thermal to produce a flow air and CO2. A turbine may be driven with the flow of air and CO2. The compressor may be driven with the turbine. Extraction from the container may continue until vapor concentration is low enough so that flow of CO2 and air from the reactor is insufficient to drive the turbine.

A hybrid fuel cell vehicle with a multi-power source and a multi-drive system includes: a plurality of primary power sources sharing a single main bus terminal and connected in parallel to each other; a plurality of drive systems receiving power from the main bus terminal to generate output torque so as to drive vehicle wheels and connected in parallel to each other; and an auxiliary power source sharing the main bus terminal and disposed between the primary power sources and the drive systems to supplement power shortage of the primary power sources.

A hybrid fuel cell-gas turbine system and method efficiently generates power using a combination of separate power generating components. The system includes a turbine system having an air compressor and a turbine, and a fuel cell. By-product waste heat from the fuel cell is used within the fuel cell to heat the cathode air.

A fuel cell system that employs a super capacitor and battery electrically coupled in series with each other and in parallel with a fuel cell stack on a power bus line. As the voltage on the power bus line changes over the operating requirements of the system, the super capacitor is charged and discharged over a relatively large voltage swing, such as an 85% SOC swing. The super capacitor equalizes or voltage matches the voltage variation on the power bus line as set by the stack voltage to the voltage of the battery. Therefore, the battery, while providing the majority of the energy and power during charge and discharge, has a relatively small defined SOC swing, which acts to maintain the battery life. The system can also include a diode electrically coupled in parallel with the super capacitor that provides reverse voltage protection and electrical power by-pass.

A hybrid fuel injection and carburetor assembly for delivering a fuel and air mixture into an intake manifold of an engine is provided. The assembly includes a housing and a plurality of inserts with Venturi-shaped bores to establish low pressure regions in the flow of air. The housing and inserts cooperate with one another to present cavities, and the inserts include apertures extending between the cavities and the low-pressure regions. The assembly also includes fuel injectors in fluid communication with the cavities. In operation, fuel is injected at a high pressure into the cavities to the point, and the pressurized fuel is delivered into the low pressure air via the apertures. Because of the large pressure difference between the pressurized fuel in the cavities and the low pressure air, the fuel becomes very atomized.

A spark-ignition type internal combustion engine, including a main tank for storing a to-be-determined fuel having an unknown self-ignition property, an auxiliary tank for accumulating a reference fuel having a known self-ignition property, and a controller. The controller is programmed to supply to a combustion chamber a blended fuel prepared by blending the to-be-determined fuel and the reference fuel at a predetermined ratio, measure a self-ignition property of the blended fuel, and determine the unknown self-ignition property of the to-be-determined fuel based on the measured self-ignition property of the blended fuel, the known self-ignition property of the reference fuel and the ratio of the blended fuel. The controller is also programmed to introduce the to-be-determined fuel after the determination from the main tank to the auxiliary tank, and store the to-be-determined fuel in the auxiliary tank such that the to-be-determined fuel serves as a next reference fuel having a known self-ignition property.

The invention discloses a flexible dual-fuel high pressure combustion chamber (HPCC) engine combustion and discharge control method and deivce. An engine comprises an air inlet channel oil injector, an air inlet valve, an air cylinder direct injection oil injector, a spark plug, an exhaust valve, a variable valve actuation (VVA) mechanism and an electronic control unit (ECU). The ECU respectively reads engine rotation speed signals and accelerator position signals, judges the engine current operation conditions according to the received engine rotation speed signals and accelerator position signals, determines the combustion mode, and further controls oil injection times, oil injection time and oil injection pulse width of two fuels, spark plug ignition time and VVA actions. According to the flexible dual-fuel HPCC engine combustion and discharge control method and deivce, different combustion modes are adopted for different loads, namely the combustion modes can be controlled timely and flexibly, and the characteristics of fuels in a cylinder can be controlled timely and flexibly; and the device has the advantages of various fuel flexibility and various fuel mode adaptability, and the purpose of effective and clean combustion in the normal working condition range of passenger vehicles can be achieved simply by adopting a diesel engine oxidation and catalyzing postprocessor DOC.