Abstract: When a detection value of a temperature sensor exceeds a set temperature, an ECU increases an opening of a sub-port by controlling a solenoid valve, and as a result, an intake volume of an expander increases. The ECU then adjusts the mass flow rate of a coolant flowing through a boiler so that a detection value of a pressure sensor indicates a pressure as close as possible to an upper limit pressure, on condition that an upper limit temperature is not exceeded.

Abstract: A Rankine cycle circuit is constituted by an expander, which forms a fluid machine, a condenser, a gear pump, which forms a fluid machine, and a boiler. A discharge passage is connected to a discharge chamber of a pump chamber. A branch passage is connected to the discharge passage, and a restriction passage is provided at the end of the branch passage. The restriction passage is open to an internal space K in a generator housing. An outflow passage extends through a partition wall of a center housing member and a side plate. The internal space K in which an alternator is located communicates with an outlet chamber through the outflow passage.

Abstract: A waste heat recovery system is for use with a power unit that includes an internal combustion engine. The waste heat recovery system includes a Rankine cycle device in which working fluid circulates through a pump, a boiler, an expander and then through a condenser, heat exchange occurs in the boiler between the working fluid and intake fluid that is introduced into the internal combustion engine while being cooled, a determination device for determining required cooling load for the intake fluid, a pressure reducing device for reducing evaporation pressure in the Rankine cycle device, and a controller for controlling the pressure reducing device so as to reduce the evaporation pressure below a predetermined evaporation pressure if the required cooling load determined by the determination device exceeds a threshold.

Abstract: The waste heat recovery system includes a Rankine cycle device in which working fluid circulates through a pump, a boiler, an expander and then through a heat exchanging device, heat exchange occurs in the boiler between the working fluid and intake fluid that is introduced into an internal combustion engine while being cooled. The heat exchanging device includes a condenser condensing the working fluid, a receiver connected downstream of the condenser and storing liquid-phase working fluid, a subcooler connected downstream of the receiver and subcooling the liquid-phase working fluid, and a selector device serving to change the ratio of the condenser to the subcooler. The waste heat recovery system further includes a determination device for determining required cooling load for the intake fluid, and a controller for controlling the selector device depending on the required cooling load determined by the determination device.

Abstract: A waste heat regeneration system includes a pump, a coolant boiler, an exhaust gas boiler, an expander, a condenser, a gas-liquid separator and a supercooler. A flow control valve maintains a temperature difference (T1-T2) at a predetermined value or less by adjusting the amount of an operating fluid which flows in a bypass flow path through the control of an opening degree based on a pressure difference (P1-P2) corresponding to the temperature difference (T1-T2) between the temperature (T1) of the operating fluid on the upstream side of the supercooler and the temperature (T2) of the operating fluid on the downstream side thereof. Accordingly, the degree of supercooling is prevented from becoming excessive and the waste heat regeneration efficiency of a Rankine cycle device can be maintained.

Abstract: A waste heat regeneration system includes a pump, a coolant boiler, an exhaust gas boiler, an expander, a first condenser, a gas/liquid separator, and a supercooler. A first flow control valve adjusts the amount of an operating fluid circulating in a first bypass flow path by controlling its opening degree based on a pressure difference P1?P2 corresponding to a temperature difference T1?T2 between the temperature T1 of the operating fluid on the upstream side of the supercooler and the temperature T2 of the operating fluid on the downstream side thereof, thereby maintaining the temperature difference T1?T2 so as to be larger than or equal to a predetermined value necessary for preventing the generation of cavitation in the pump, and ensuring the degree of supercooling.

Abstract: A scroll type compressor has a housing, a rotary shaft, a fixed scroll member, a movable scroll member and a rotation preventing mechanism. The rotation preventing mechanism has a movable pin that is provided on the surface of movable end plate and extends toward end surface of the housing in parallel with an axis of the rotary shaft, a fixed pin that is provided on the end surface of the housing and extends toward the surface of the movable end plate in parallel with the axis of the movable pin, a rolling element that is disposed between the movable and the fixed pins, being contactable with the movable and the fixed pins and a retainer retaining the rolling element between the movable and the fixed pins.

Abstract: A waste heat recovery mechanism and a waste heat recovery apparatus generate electricity even when an expander, which is coupled to a combustion engine outputting rotational drive force, is locked. The waste heat recovery mechanism includes an alternator having a rotary shaft, which is coupled to and driven to rotate by a combustion engine, and an expander having an output shaft, which is coupled to the rotary shaft of the alternator. The output shaft applies a rotational drive force to the rotary shaft, thereby assisting rotation of the rotary shaft. A torque limiter is located between the rotary shaft of the alternator and the output shaft of the expander.

Abstract: The present invention provides a Rankine cycle apparatus that is mounted in a vehicle and includes a Rankine cycle circuit and a refrigeration cycle circuit. The Rankine cycle circuit and the refrigeration cycle circuit each include a condenser for cooling a corresponding type of working fluid and a receiver, which is connected to the condenser. The two condensers are arranged side by side in the upward-downward direction and each have a first end and a second end in the vehicle width direction. A first receiver, which is one of the receivers, is arranged outward of the first end in the vehicle width direction. A second receiver, which is the other one of the receivers, is located outward of the second end in the vehicle width direction.

Abstract: When a detection value of a temperature sensor exceeds a set temperature, an ECU increases an opening of a sub-port by controlling a solenoid valve, and as a result, an intake volume of an expander increases. The ECU then adjusts the mass flow rate of a coolant flowing through a boiler so that a detection value of a pressure sensor indicates a pressure as close as possible to an upper limit pressure, on condition that an upper limit temperature is not exceeded.

Abstract: A Rankine cycle apparatus includes a circuit having a pump for working fluid, a heat exchanger for causing heat exchange between the working fluid and fluid supplied from an exhaust heat source, and an expanding portion that expands the working fluid that has been exposed to the heat exchange to produce mechanical energy. The expanding portion includes a fixed scroll, a movable scroll that orbits with respect to the fixed scroll, and a back pressure chamber arranged at the side corresponding to a backside of the movable scroll opposite to the surface facing the fixed scroll. The Rankine cycle apparatus further includes an inlet mechanism for introducing the working fluid from a high pressure zone that extends from the outlet side of the pump to the inlet of the heat exchanger to the back pressure chamber to produce back pressure that presses the movable scroll against the fixed scroll.

Abstract: A Rankine cycle system mounted on a vehicle includes a Rankine cycle circuit, a pressure detector, a temperature detector and a controller. The Rankine cycle circuit includes a fluid expansion device, a fluid transferring device, first and second passages, a heater, a cooling device, a bypass passage and a flow regulating valve. The bypass passage connects the first passage and the second passage, and in which the flow regulating valve is provided for opening and closing the bypass passage. The controller is connected to the flow regulating valve for controlling an operation of the flow regulating valve and to the pressure and temperature detectors and for receiving signals of pressure and temperature from the pressure and temperature detectors, respectively. The controller controls the operation of the flow regulating valve based on a superheat degree of the working fluid calculated from the signals of the pressure and temperature.

Abstract: A Rankine cycle system mounted on a vehicle has a Rankine cycle circuit through which working fluid circulates, a power generator, a power storage and a controller. The Rankine cycle circuit includes a fluid expansion device, a fluid transferring device, first and second passages, a heater, a cooling device, a bypass passage and a flow regulating valve. The bypass passage connects the first passage to the second passage. The flow regulating valve is provided in the bypass passage for opening and closing the bypass passage. The power generator converts the work generated by the fluid expansion device into electric power. The controller monitors charge rate of the electric power charged in the power storage and controls an operation of the flow regulating valve based on the monitored charge rate. The controller causes the flow regulating valve to be opened when the monitored charge rate is greater than a predetermined value.

Abstract: The waste heat recovery system of an engine includes a Rankine cycle, a first bypass passage, a first valve and a control unit. The Rankine cycle allows a working fluid to circulate therethrough. The Rankine cycle has a first heat exchanger, a second heat exchanger, an expander and a condenser. The first heat exchanger exchange heat between the working fluid and the engine or a first intermediate medium exchanging heat with the engine. The first bypass passage allows the working fluid to pass therethrough. One end of the first bypass passage is located at an upstream side of the condenser and the other end is located at a downstream side of the condenser. The first valve opens and closes the first bypass passage. When temperature of the engine or the first intermediate medium is lower than a first predetermined value, the control unit opens the first valve.

Abstract: A waste heat regeneration system for a vehicle having a vehicle engine actuated by a start-stop switch includes Rankine cycle circuit, a motor generator, a by-pass circuit and a control device. The Rankine cycle circuit includes a pump, a boiler heating the heat medium by heat exchanging with waste heat generated by the vehicle engine, an expansion device and a condenser. The by-pass circuit is connected to the Rankine cycle circuit at the upstream and downstream sides of the condenser and the communication of the heat medium is openable and closable therethrough. When the start-stop switch of the vehicle engine is turned off, the control device controls the by-pass circuit to communicate the heat medium therethrough and keeps controlling of the rotational speed of the motor generator until pressure difference between the upstream and downstream of the expansion device is decreased to a predetermined level, and then stops the control.

Abstract: A vehicle with a Rankine cycle system and a refrigerating cycle system for air-conditioning includes a Rankine condenser forming a part of the Rankine cycle system which converts waste heat of a vehicle into power and an air-conditioning condenser forming a part of the refrigerating cycle system. The Rankine condenser and the air-conditioning condenser are disposed one above the other in the vehicle as viewed from a front of the vehicle.

Abstract: A scroll type compressor has a housing, a rotary shaft, a fixed scroll member, a movable scroll member and a rotation preventing mechanism. The rotation preventing mechanism has a movable pin that is provided on the surface of movable end plate and extends toward end surface of the housing in parallel with an axis of the rotary shaft, a fixed pin that is provided on the end surface of the housing and extends toward the surface of the movable end plate in parallel with the axis of the movable pin, a rolling element that is disposed between the movable and the fixed pins, being contactable with the movable and the fixed pins and a retainer retaining the rolling element between the movable and the fixed pins.

Abstract: A scroll-type fluid machine includes a mechanism for driving a movable scroll relative to a fixed scroll. The mechanism includes a drive shaft rotatable on a first axis, an eccentric pin and a bearing. The eccentric pin revolves around the first axis with the rotation of the drive shaft and has an outer peripheral surface centered on a second axis that is parallel to and eccentric to the first axis. The bearing is mounted to the movable scroll and has an inner peripheral surface centered on a third axis that is parallel to and eccentric to the first and second axes. The inner peripheral surface is in contact with the outer peripheral surface of the eccentric pin. Pressing force is applied to the bearing from the eccentric pin due to the arrangement of the first, second and third axes so as to press the movable scroll to the fixed scroll.

Abstract: A compressor, which is cooled by cooling medium, includes a compression chamber, a first cooling chamber and a second cooling chamber. In the compression chamber, gas is compressed and then discharged therefrom. The first cooling chamber, in which the cooling medium flows, is provided so as to adjoin the compression chamber for cooling the gas in the compression chamber. The second cooling chamber adjoins the first cooling chamber. The second cooling chamber has a gas passage in which the discharged gas flows and a medium passage in which the cooling medium flows. The medium passage is arranged so as to restrain transmission of heat of the discharged gas in the gas passage to the cooling medium in the first cooling chamber.

Abstract: An optical semiconductor device includes an optical semiconductor element, a semiconductor region, and a buried layer. The optical semiconductor element is formed on a semiconductor substrate. The semiconductor region opposes the optical semiconductor element and essentially surrounds the optical semiconductor element to form walls. The buried layer is arranged between the walls of the semiconductor region and the optical semiconductor element and formed by vapor phase epitaxy. In this optical semiconductor device, a distance between the wall of the semiconductor region and a side wall of the optical semiconductor element is larger in a portion in which the growth rate of the vapor phase epitaxy in a horizontal direction from the side wall of the optical semiconductor element and the wall of the semiconductor region is higher.