Patent application number | Description | Published |
20090255323 | PROTON EXCHANGE MEMBRANE FUEL CELL HUMIDITY SENSOR - A humidity sensing device for determining the amount of humidity in at least one primary fluid stream that is passed to a fuel cell stack is provided. The sensing device includes an outer housing and an inner housing. The outer housing is positioned within at least one conduit such that the outer housing and the conduit coact with each other to generate at least one secondary fluid stream from the primary fluid stream. The inner housing is positioned within the outer housing such that the inner housing is configured to receive the secondary fluid stream and to measure an amount of water present in the secondary fluid stream to determine the amount of humidity in the primary fluid stream. | 10-15-2009 |
20100262301 | METHOD FOR CONTROLLING HEAT EXCHANGER FLUID FLOW - In an exemplary embodiment, a method to control excessive temperature changes in a coolant circuit includes providing a coolant circuit including a bypass flow pathway bypassing a heat exchanger, said coolant circuit at an elevated operating temperature; providing an adjustable coolant flow through said bypass flow pathway and said heat exchanger; providing a coolant pump in said coolant circuit; determining a temperature change in said coolant circuit in response to initiating a coolant flow from said heat exchanger into said coolant circuit, said temperature change greater than predetermined limit; and in response to said determined temperature change, adjusting at least one or more of said coolant pump speed and said coolant flow to maintain said coolant circuit within a predetermined temperature range. | 10-14-2010 |
20110132292 | COOLING FAN CONTROL - Methods and systems are provided for reducing aerodynamic drag on a moving vehicle. One example method comprises, during a first vehicle moving condition, operating the cooling fan, and during a second vehicle moving condition, selectively applying a braking torque on the fan. | 06-09-2011 |
20120061069 | Cooling In A Liquid-To-Air Heat Exchanger - In an engine coolant circuit with a radiator and an engine, a fan and a coolant pump may be provided. The fan and pump may be electrically driven, driven by a variable speed clutch, hydraulically driven, or driven by some other actively controllable means. When an increase in heat transfer rate is indicated, the fan speed or the coolant pump speed may be increased. According to an embodiment of the disclosure, the choice of increasing the fan speed or increasing the pump speed is determined so that the power consumed is minimized. The broad concept is that dQ/dP, the gradient in heat transfer rate to power, is determined for both the fan and the pump at the present operating condition. The one with the higher gradient is the one that is commanded to increase speed. | 03-15-2012 |
20140034741 | METHOD AND SYSTEM FOR REGULATING ENGINE TEMPERATURE - A system and method for operating a device at a desired temperature is described. In one example, current supplied to a heater that melts a wax medium or material controlling flow through a valve is adjusted to reduce valve opening and closing delay. The system and method may improve device temperature control, thereby reducing device emissions, enhancing device performance, and improving device durability. | 02-06-2014 |
20140216709 | ELECTRIC VEHICLE THERMAL MANAGEMENT SYSTEM - A traction battery thermal management system is provided. The thermal management system includes a battery loop for regulating the traction battery temperature. A motor loop is provided for regulating a motor temperature. The thermal management system also includes a radiator. A radiator valve selectively controls fluid flow through the radiator. A battery valve selectively couples the battery loop and the motor loops. The battery loop, the motor loop are in fluid communication and arranged in parallel to be cooled by the radiator. | 08-07-2014 |
20150089922 | METHODS AND SYSTEMS FOR UTILIZING WASTE HEAT FOR A HYBRID VEHICLE - Systems and methods for operating an engine that includes an exhaust gas heat recovery system are described. The system may reduce engine warm-up time and increase an amount of time an engine of a hybrid vehicle is deactivated while the hybrid vehicle is powered by a motor. In one example, a phase change material selectively stores and releases exhaust gas energy from and engine to improve vehicle operation. | 04-02-2015 |
20150192060 | COOLING IN A LIQUID-TO-AIR HEAT EXCHANGER - An engine cooling system includes a liquid-to-air heat exchanger having an associated fan and a pump forcing convection and a controller communicating with the fan and the pump, the controller increasing fan speed in response to a first gradient in heat transfer rate to power exceeding a second gradient in heat transfer rate to power for increasing pump speed, and increasing pump speed when the second gradient is greater than the first gradient. The controller may increase the pump speed in response to a desired increase in heat transfer rate. The first gradient may be based on a gradient in heat transfer rate to air flow from a map of heat exchanger performance. The second gradient may be based on a gradient in heat transfer rate to coolant from a map of heat exchanger performance. | 07-09-2015 |