5416results about "Liquid cooling" patented technology

A method of thermal management for a thermal management system in a vehicle includes the steps of selecting a thermal management function. The method also includes the steps of adjusting a temperature within the thermal management system using the thermal management function and using the adjusted temperature within the thermal management system to control a temperature within an occupant compartment of the vehicle.

Various techniques are disclosed for improving airtight two-phase heat-transfer systems employing a fluid to transfer heat from a heat source to a heat sink while circulating around a fluid circuit, the maximum temperature of the heat sink not exceeding the maximum temperature of the heat source. The properties of those improved systems include (a) maintaining, while the systems are inactive, their internal pressure at a pressure above the saturated-vapor pressure of their heat-transfer fluid; and (b) cooling their internal evaporator surfaces with liquid jets. FIG. 43 illustrates the particular case where a heat-transfer system of the invention is used to cool a piston engine (500) by rejecting, with a condenser (508), heat to the ambient air; and where the system includes a heat-transfer fluid pump (10) and means (401-407) for achieving the former property.

The disclosure relates to reciprocating fluid working devices including internal combustion engines, compressors and pumps. A number of arrangements for pistons and cylinders of unconventional configuration are described, mostly intended for use in IC engines operating without cooling. Included are toroidal combustion or working chambers, some with fluid flow through the core of the toroid, a single piston reciprocating between a pair of working chambers, tensile valve actuation, tensile links between piston and crankshaft, energy absorbing piston-crank links, crankshafts supported on gas bearings, cylinders rotating in housings, injectors having components which reciprocate or rotate during fuel delivery. In some embodiments pistons mare rotate while reciprocating. High temperature exhaust emissions systems are described, including those containing filamentary material, as are procedures for reducing emissions during cold start by means of valves at reaction volume exit. Also disclosed are improved vehicles, aircraft, marine craft, transmissions and exhaust emission systems suited to the engines of the invention.

A thermoelectric generating device has a thermoelectric element which utilizes an exhaust gas from an engine as a high temperature heat source and an engine coolant as a low temperature heat source in order to generate electricity. An introducing passage introduces a part of the exhaust gas passed through the thermoelectric element into an intake of the engine. An introducing valve opens and closes the introducing passage. A controller controls an opening degree of the introducing valve according to a load of the engine.

An integrated expansion turbine/electrical generator assembly (collectively referred to as a “turbo-generator”) suitable for use in waste heat recovery and similar applications. The turbo-generator uses a common shaft mounting a one or more stage expansion turbine and a homopolar electrical generator. Magnetic levitating axial and thrust bearings are used to hold the common shaft in its proper position with a fixed housing. The magnetic bearings minimize frictional losses, allowing the common shaft to spin at a very high rotational velocity. Sensor rings continually monitor the common shaft's position. This information is used by control electronics to regulate the magnetic bearings in order to hold the rotating shaft's position. Electrical energy is extracted from the rotating shaft in the form of a direct current. Preferably integrated power-switching electronics are used to generate single or three-phase AC power, which can be phase-matched to an existing power grid or other application.

In a front end structure of a vehicle, a heat exchanger is arranged at a position lower than a bumper reinforcement member, so a position of an engine hood is lowered. Electric auxiliary devices such as a radar, electronic control units for lights, and an air cleaner are arranged at a position higher than the bumper reinforcement member or at the rear of the bumper reinforcement member. By this arrangement, the electric auxiliary devices are arranged at a position which is less likely to be affected by the bumper reinforcement member in a case of light frontal crush.

An energy recovery system and method using an organic rankine cycle is provided for recovering waste heat from an internal combustion engine, which effectively controls condenser pressure to prevent unwanted cavitation within the fluid circulation pump. A coolant system may be provided with a bypass conduit around the condenser and a bypass valve selectively and variably controlling the flow of coolant to the condenser and the bypass. A subcooler may be provided integral with the receiver for immersion in the accumulated fluid or downstream of the receiver to effectively subcool the fluid near the inlet to the fluid pump.

In an internal combustion engine for a motor vehicle, having a cylinder head and an engine block, each with a coolant inlet port and a coolant outlet port which is common to the cylinder head the engine block, a main coolant pump having an intake side connected to the coolant outlet port and a pressure side connected to a first control valve via which coolant reaches the inlet port of the cylinder head and the inlet port of the engine block depending on the temperature of the coolant, and to a method for operating such an internal combustion engine, wherein the main coolant pump is selectively actuated to pump the coolant through at least one of the cylinder head and the engine block or is shut down depending on the engine operating state.

Disclosed herein is a heat transfer fluid comprises: a freezing point-depressant; an aliphatic carboxylic acid, a salt thereof, or a combination of the foregoing; an inorganic phosphate; a magnesium compound; deionized water; and a component selected from the group consisting of azole compounds, copper alloy corrosion inhibitors, phosphonocarboxylates, phosphinocarboxylates, and combinations of two or more of the foregoing components. Also described is a heat transfer system comprising the heat transfer fluid.

Apparatus and methods for controlling attention and training of autonomous robotic devices. In one approach, attention of the robot may be manipulated by use of a spot-light device illuminating a portion of the aircraft undergoing inspection in order to indicate to inspection robot target areas requiring more detailed inspection. The robot guidance may be aided by way of an additional signal transmitted by the agent to the robot indicating that the object has been illuminated and attention switch may be required. Responsive to receiving the additional signal, the robot may initiate a search for the signal reflected by the illuminated area requiring its attention. Responsive to detecting the illuminated object and receipt of the additional signal, the robot may develop an association between the two events and the inspection task. The light guided attention system may influence the robot learning for subsequent actions.

An oil supply device for an engine includes a first oil suction passage, a second oil suction passage, a first pump for sucking and discharging oil from the first oil suction passage, a second pump arranged in series with the first pump, the second pump for sucking and discharging oil from at least one of the first pump and the second oil suction passage, a check valve for blocking oil circulation, a first oil passage, a second oil passage, a third oil passage for establishing communication between the first oil passage and the second oil passage, and a supply volume control device for varying oil supply volume to a lubrication system portion, to a cooling system portion, or to the lubrication system portion and the cooling system portion in accordance with a change in at least one of an engine oil temperature, an engine rotation speed, and an engine load.

A thermoelectric generator has a high temperature heat source part provided on a first passage through which a first fluid for cooling an engine flows, a low temperature heat source part provided on a second passage through which a second fluid having a temperature lower than that of the first fluid flows, and a thermoelectric element for producing electric power by a temperature difference produced between the high temperature heat source part and the low temperature heat source part. The first passage is included in a first circuit in which the engine and a first radiator for cooling the first fluid are connected in loop through a main passage. Further, the first passage is in parallel to the first radiator in the first circuit. The second passage is included in a second circuit that is separate from the first circuit and includes a second radiator for cooling the second fluid.

A cooling system for an internal combustion engine incorporating a heat accumulator to temporarily store heat during peak heat loads. In automotive vehicles, the heat accumulator may store excess heat generated during vehicle acceleration or hill climbing and it may dissipate stored heat during vehicle cruise, deceleration, or engine idle. The heat accumulator contains phase change material with a solid-to-liquid transition temperature higher than the normal operating temperature of the cooling system. The invention enables reducing the size and weight of engine cooling system without compromising its performance. This is particularly important for improving fuel economy and reduction of emission in automotive vehicles. In addition, the invention enables reducing the coolant inventory in the system thereby allowing for faster engine warm-up and reduced emissions of harmful pollutants during a cold engine start. The invention may be also used for thermal management of engine oil, transmission fluid, or hydraulic fluid.

An apparatus including a reciprocating internal combustion engine and a thermochemical recuperator in which a fuel is reformed. The thermochemical recuperator is heated by exhaust gases from the reciprocating internal combustion engine and steam for the reforming process is produced by passing feed water through an engine lubricating oil heat exchanger, an engine cooling system heat recovery system and an exhaust gas heat recovery system arranged in series.

An object of the invention is to provide a waste heat collecting system having an expansion device, in which an over expansion of refrigerant is prevented so that a loss to be caused by the over expansion is eliminated. A volume ratio of expansion for the expansion device is selected at a value, at which proper expansion of the refrigerant is achieved when the pressure difference between the high pressure and the low pressure is minimum.

The present invention provides a waste heat recovering device capable of recovering waste heat with good efficiency from various heat sources in an internal combustion engine. The waste heat recovering device for driving an expander 14 by evaporating a working fluid by waste heat of an internal combustion engine 11 includes: a working fluid circulation flow path 15 in which the working fluid of the expander 14 is caused to circulate; a high-temperature heat exchanger 12 for heating the working fluid flowing in the working fluid circulation flow path 15 by a high-temperature fluid such as exhaust gas of the internal combustion engine 11; a low-temperature heat exchanger group 16 having, for each of low-temperature fluids such as cooling water and oil of the internal combustion engine 11, a low-temperature heat exchanger 13a, 13b for heating the working fluid flowing in the working fluid circulation flow path 15 by any one of the low-temperature fluids, the low-temperature heat exchangers 13a, 13b being disposed in parallel with each other; a flow rate control valve 17 that controls a flow rate of the working fluid flowing into each low-temperature heat exchanger 13a, 13b of the low-temperature heat exchanger group 16; and control means 18 for controlling the flow rate control valve 17.

In a construction machine comprising an engine, hydraulic device, and heat exchanger for cooling the engine and the hydraulic device, which are all disposed in an upper rotating body of the construction machine, there is formed a maintenance passage along which maintenance portions of the engine and the hydraulic device are disposed so as to cross the upper rotating body. Exhaust air from cooling fans for sending air to the heat exchanger is discharged to the exterior of the machine body through the passage. Thus, the passage is utilized as an exhaust air passage for the heat exchanger, whereby it is possible to provide a construction machine improved in cooling efficiency for the heat exchanger.