Abstract: An engine system includes an intake line, an exhaust line, an exhaust gas recirculation (EGR) system, a turbocharger including a turbine provided in the exhaust line, and a compressor provided in the intake line, wherein the compressor compresses outside air, an intake bypass line which branches off from the intake line at a rear end of the compressor and merges into the intake line at the front end of the compressor, a recirculation valve installed at a point at which the intake bypass line and the intake line merge together, and a controller which controls operations of opening and closing the recirculation valve so that a portion of the intake gas compressed by the compressor is supplied into the intake line at the front end of the compressor through the intake bypass line, or the intake gas is supplied into the combustion chamber through the intake bypass line.

Abstract: Systems and methods for determining when one or more cylinders of an engine may be deactivated are presented. In one example, different cylinder deactivation strategies are used to determine which engine cylinders are deactivated during an engine cycle in response to an actual total number of valve actuator state changes being greater than a first threshold.

Abstract: A speed limiting device may include a communicator configured to communicate with a tire air pressure monitor, a steering angle detector, a yaw rate detector and an engine controller of a vehicle; a storage configured to store limited speed information corresponding to slip information, in a form of a table; and a controller configured to acquire slip information based on a steering angle detected by the steering angle detector and a yaw rate detected by the yaw rate detector when abnormality information is received from the tire air pressure monitor, to check a limited speed corresponding to the acquired slip information, and to output the checked limited speed to the engine controller.

Abstract: An engine control device controls a cylinder direct fuel injection type spark ignition engine provided with a fuel injection valve configured to directly inject fuel to a cylinder and an ignition plug configured to perform spark ignition for a gas mixture inside the cylinder. In a case where it is necessary to warm up an exhaust gas purifying catalyst disposed in an exhaust passage, the engine control device executes a catalyst warm-up operation in which a fuel is injected at a timing during the compression stroke, and at a timing when the fuel spray colliding with the piston crown surface moves toward the ignition plug along the shape of the piston crown surface, and in which the ignition timing is after compression top dead center. The engine control device advances the fuel injection timing in accordance with an increase in an estimation amount of a liquid fuel remaining on the top surface of the piston during execution of the catalyst warm-up operation.

Abstract: Disclosed herein is a fuel injection control device for a direct injection engine including an engine body (engine 1) and a fuel injection control unit (engine controller 100). The fuel injection control unit injects a fuel in a predetermined injection mode into a combustion chamber (17) such that while the engine body is warm, an air-fuel mixture layer and a heat-insulating gas layer, surrounding the air-fuel mixture layer, are formed in the combustion chamber at a point in time when an air-fuel mixture ignites, and changes the injection mode of the fuel into the combustion chamber such that while the engine body is cold, the lower the temperature of the engine body is, the thinner the heat-insulating gas layer becomes.

Abstract: The present invention relates to a vehicle control unit (20). The vehicle control unit (20) comprises an input (26) for detecting a start demand and a driving condition. The vehicle control module also comprises a control module (28) arranged to control an engine start attribute according to a first profile (34) and a second profile (36). The vehicle control module (20) also comprises a selection module (30) arranged to select between the first and second profiles (34, 36) based on detecting a predetermined driving condition, in response to detecting a start demand.

Abstract: A system for correcting engine torque includes: a torque correction value generator generating a torque correction value for correcting output torque of an engine; a torque correction determination unit determining applicability of the generated torque correction value; and a torque applying unit determining a final engine output torque by applying the generated torque correction value to the output torque of the engine based on the determined applicability of the generated torque correction value.

Abstract: Various methods and systems are provided for diagnosing an engine component based on a measured engine speed during an engine shutdown event. As one embodiment, a method for an engine includes measuring an engine speed drop rate, via an engine speed sensor, during an engine shutdown event; and indicating a change in performance of one of the engine speed sensor or an additional engine component in response to the measured engine speed drop rate deviating from a reference engine speed drop rate by a pre-set or pre-defined threshold rate.

Abstract: The present disclosure provides a fuel injector for an internal combustion engine with a fuel injector body having a valve chamber, a first conduit in fluid communication with the valve chamber for a first flow of fuel having a first pressure, and a second conduit in fluid communication with the valve chamber for a second flow of fuel having a second pressure. The fuel injector further includes a valve member configured to move between the first conduit and the second conduit. Additionally, an actuator of the fuel injector is configured to move the valve member during a fuel injection cycle. The fuel injector is configured to operate in at least three modes.

Abstract: A method for actuating a fuel injector having a magnetic coil drive for an internal combustion engine of a motor vehicle is disclosed. The fuel injector has a first terminal and a second terminal, where the first terminal is connectable via a switch element to ground and the second terminal is connected to ground. The method includes the following: actuating the switch element to connect the first terminal to ground, acquiring a time curve of the current strength of a current flowing through the magnetic coil drive, and applying a voltage pulse to the magnetic coil drive to initiate an opening procedure of the fuel injection. A duration of the voltage pulse is established as a function of the acquired time curve of the current strength. Furthermore, an engine controller and a computer program are described.

Abstract: A piston of an internal combustion engine includes a crown surface, a first cavity, and a second cavity. The crown surface forms an internal wall surface of a combustion chamber. The first cavity is a depression provided in the crown surface. The second cavity is a depression provided inside the first cavity. The first cavity includes an upstream portion located upstream of the second cavity in a flow direction of a tumble flow flowing along the crown surface and a downstream portion located downstream of the second cavity in the flow direction. The upstream portion extends further in the flow direction than the downstream portion.

Abstract: A device for reducing the jet noise of a turbine engine includes an outer cover having an inside wall defining the outside of an annular passage for passing a bypass stream from the engine, the wall of the outer cover including a plurality of microjet circuits, each including intakes for taking a gas stream from the bypass stream flow passage and leading to a single feed duct, which in turn opens out into the trailing edge of the outer cover via at least one ejection grating suitable for splitting the intake gas stream into a plurality of gas streams of right sections of dimensions less than a right section of the feed duct.

Abstract: A thrust reverser for a nacelle of an aircraft turbojet engine is provided that includes a thrust reverser cowl movable along a direction parallel to a longitudinal axis of the nacelle and a variable section outlet nozzle extending from the thrust reverser cowl. The thrust reverser further includes an actuator, a first locking device to lock the thrust reverser cowl, a second locking device to lock the variable section outlet nozzle, and a reset lever. The reset lever is pivotally driven by a locking pin secured to the cowl and pivots from a rest position to a reset position.

Abstract: According to one aspect, an infrared suppression system that utilizes a primary airflow and a secondary air flow for a gas turbine engine is provided. The infrared suppression system includes an exit flap configured to control a flow of exhaust air out of the gas turbine engine and a secondary flow door that is configured to selectively control the secondary air flow into the gas turbine engine. The mixture of the secondary air flow and the primary air flow from the gas turbine engine suppresses an infrared signature produced by the gas turbine engine.

Abstract: A gas turbine engine includes a fan section and a core turbine engine. The fan section includes a fan and a fan shaft, with the fan including a plurality fan blades rotatable with the fan shaft. The core turbine engine includes a turbine section having a first turbine and a second turbine. The core turbine engine additionally includes a spool rotatable with the second turbine. An epicyclic power gearbox is also provided including a sun gear rotatable with the spool, a ring gear, and a total of four or less planet gears engaged between the sun gear and the ring gear. The power gearbox is configured such that a fan pressure ratio defined by the fan is greater than about 1.05 and less than about 1.50 during operation of the gas turbine engine.

Abstract: Rotating detonation engines are provided with various improvements pertaining to performance and reliability. Improvements pertain to, for example, a fluidic valve/premixing chamber, injection/swirl, flow control and turning, ignition, and cooling.

Abstract: A fuel supply device for supplying fuel into a combustion chamber of an internal combustion engine is provided. The device includes: a low pressure fuel supply pipe to which a low pressure fuel is supplied; a high pressure fuel supply pipe to which high pressure fuel to be supplied into the combustion chamber is supplied; fuel supply units provided between the low pressure fuel supply pipe and the high pressure fuel supply pipe, each of the fuel supply units being configured to boost the fuel in the low pressure fuel supply pipe and supply the boosted fuel to the high pressure fuel supply pipe; and a control unit configured to control the fuel supply units. The control unit controls the fuel supply units such that a total amount of ejection of the fuel ejected from the fuel supply units per unit time is close to a constant value.

Abstract: Methods and systems are provided for adjusting an amount of friction brake effort and an air conditioning compressor load to collect water for water injection into an engine. In one example, a method may include adjusting the AC compressor load of a mechanical air conditioning system and an amount of friction brake effort based on a water level in a water storage tank of the water injection system. Further, the method may include adjusting a ratio of the AC compressor load to friction brake effort to deliver a driver demanded brake effort.

Abstract: A pressure sensor is provided in a purge pipe connecting a fuel tank to a canister, so that the pressure sensor outputs an electrical signal of a first sensor value depending on an inside pressure of the canister. A control unit calculates an estimated sealed pressure, which corresponds to the inside pressure of the canister in a condition that the canister and the fuel tank are in a sealed condition. The control unit determines that there is no leakage of fuel vapor, when the first sensor value is out of a first pressure range. The control unit determines that there is a small leakage of the fuel vapor, when the first sensor value is within the first pressure range but out of a second pressure range, wherein the second pressure range is smaller than the first pressure range. The control unit determines that there is a large leakage or a blocked-up condition in the purge pipe when the first sensor value is within the second pressure range.

Abstract: An apparatus for purging fuel vapor includes: a turbocharger; a recirculation valve; a canister connected with a fuel tank through a vapor line and collecting fuel vapor of fuel stored in the fuel tank; a purge control solenoid valve installed in a main purge line connected with the canister and selectively blocking the fuel vapor collected in the canister; a first check valve; a second check valve; and a differential pressure creating valve installed in the intake line at the upstream portion of the compressor, and creating negative pressure.

Abstract: A method for an engine is presented, wherein during a first condition, pressurized gas from an engine coolant degas bottle to an ejector positioned in a vent line coupled to a fuel vapor canister; and the contents of the fuel vapor canister are purged to an engine intake. The ejector may draw atmospheric air into the fuel vapor canister, thus enabling purging of the fuel vapor canister even when an engine intake vacuum is below a threshold. In this way, boosted engines and other engines configured to operate with reduced intake vacuum may execute canister purging events that are independent of engine intake pressure.

Abstract: A method for an engine is presented, wherein purge air is routed through a fuel vapor canister during a first condition such that desorbed fuel vapor traverses a canister purge port en route to an engine intake, and wherein purge air is routed through a fuel vapor canister during a second condition such that desorbed fuel vapor traverses a canister load port en route to the engine intake. Bypassing the canister purge port during a canister purge event allows for cleaning adsorbed fuel vapor from the canister even if flow through the canister purge port is restricted. In this way, vehicle emissions may be mitigated during conditions where a carbon dust filter at the canister load port is clogged.

Abstract: An air box assembly attached to an outdoor power tool for reducing sound generated by an engine is provided. The air box assembly includes a casing formed as an upper and lower housing attached to each other to define an enclosed space. The casing includes at least one air inlet and an air outlet. At least one filter is positioned within the casing. An air guide assembly is positioned within the casing such that the flow of air to the engine passes through the air guide assembly as it travels to the engine and sound from the engine passes through the air guide assembly as it exits the air box assembly. The air guide assembly includes a plurality of fluid pathways therein, wherein the fluid pathways are in fluid communication with the air outlet of the air box assembly.

Abstract: A fuel injection valve includes: a housing that includes an injection hole and a valve seat; a needle that includes a flange at a radially outer side of the needle and opens or closes the injection hole; a movable core that is installed on the valve seat side of the flange; a first spring that urges the needle toward the valve seat side; a second spring that urges the movable core toward an opposite side, which is opposite from the valve seat; and a limiting member that is installed on a radially outer side of the needle such that the limiting member enables movement of the movable core between the limiting member and the flange on the valve seat side of the flange. The limiting member includes an outside projection, which supports the second spring; and a tubular portion and an inside projection, which are contactable with the movable core.

Abstract: A bush is disposed on an inner wall of a fixed core. A second spring, which biases a movable core in a valve-closing direction, has one end abutting the bush. The bush is formed separately from the fixed core, and is formed to be movable relative to the fixed core when adjusting a biasing force of the second spring. When a needle is abutting a valve seat, a gap is formed between a movable core first abutting face of the movable core and a flange end face of a flange portion included in the needle. Accordingly, during valve-opening, a relatively large force in a valve-opening direction is applied to the needle. Further, by changing the position of the bush relative to the movable core, the biasing force of the second spring may be adjusted without changing a length of the gap in a central axis direction.

Abstract: A fuel injector, comprising a nozzle body having a proximal end and a distal end, an upper row of nozzle holes being equally spaced about a first circumference of the nozzle body, and a lower row of nozzle holes located between the distal end and the upper row of nozzle holes, wherein the upper row has a first number of holes that is greater than a second number of holes in the lower row and wherein one of the first number of holes and the second number of holes is odd.

Abstract: An atomizer of a fuel electro-injector is equipped with a nozzle and a valve needle having a head, which is coupled to a sealing seat of the nozzle, and stem, which engages an inner seat of the nozzle; the stem and the nozzle define an annular passageway with a chamber that axially terminates at the sealing seat; the stem has an intermediate portion coupled in an axially sliding manner in the inner seat and defining a plurality of channels, the outlets of which are arranged on the annular chamber; the sealing seat and the head of the valve needle define a discharge section, which is annular and has a width that increases as the opening stroke of the valve needle proceeds; the ratio between the depth and the outer chord of the minimum cross-section of the channels is greater than or equal to two.

Abstract: A method of controlling fuel delivery to an engine includes providing a fluid atomizer, a mechanically driven air compressor, a start up air source, and an air valve coupled between the mechanically driven air compressor and the start up air source, charging the start up air source, delivering compressed air from the start up air source to the fluid atomizer, providing an initial air/fluid mixture with the fluid atomizer, and operating the air valve to direct compressed air from the mechanically driven air compressor to the fluid atomizer.

Abstract: A restart control device is applied to a vehicle which is provided with an internal combustion engine, an electric motor, a driving wheel, and a clutch. The restart control device has a restart-condition determining portion which determines whether a restart condition for restarting the internal combustion engine is established while the vehicle is coasting; a push-start portion which starts the internal combustion engine by a push-start; a start-up portion which starts the internal combustion engine by use of an electric motor; and a doubly start-up portion which tries to start the internal combustion engine by one of the push-start portion and the start-up portion when the restart-condition determining portion determines that the restart condition is established. The doubly start-up portion tries to start the internal combustion engine by another one of the push-up portion and the start-up portion when the internal combustion engine has not been started.

Abstract: In a steer by wire and idle stop vehicle, the idle stop is terminated if the steering wheel (11) is turned by more than a prescribed threshold value. For the purpose of preventing consumption of power by a steering actuator and preventing an unexpected steering action upon termination of the idle stop, the engine restart threshold value (??th) is varied depending on the direction of the change of the steering angle from the start of the idle stop operation. In particular, if the change (??) of the steering angle is in the direction to increase the steering angle from the value (?s) at the start of the idle stop operation, the engine restart threshold value is raised. If the change of the steering angle is in the direction to decrease the steering angle from the value at the start of the idle stop operation, the engine restart threshold value is lowered.

Abstract: Methods, apparatus, and computer readable media are disclosed for deterrence of ignition of a vehicle engine ignition when a fuel nozzle is in a fuel intake area. An example vehicle includes a fuel intake area, a camera, and a processor. The example processor, in response to an ignition switch being in an on-position, is to detect, via the camera, whether a fuel nozzle is in the fuel intake area. The example processor is to deter ignition of a vehicle engine when the fuel nozzle is in the fuel intake area.

Abstract: An induction cleaning analyzing system includes a pressure sensor, an ignition event detector, and a control module. The pressure sensor measures airflow pressures of intake air and/or exhaust from cylinders in a common airflow pathway of a vehicle. The ignition event detector determines ignition events of the cylinders. The control module obtains pressure waveforms representative of the airflow pressures and divides the pressure waveforms into waveform segments. The control module associates different subsets of the waveform segments with different ones of the cylinders using the ignition events. The control module also identifies cyclic variations in the airflow pressures flowing in the common airflow pathway and caused by at least one of the cylinders by examining the waveform segments associated with the at least one of the cylinders.

Abstract: An engine has an ignition source in a combustion chamber of the engine. An inner housing is provided that includes one or more jet apertures and defines an inner chamber containing the ignition source. An outer housing (or pre-chamber) is provided that includes one or more jet apertures in communication with the main combustion chamber and defines an outer chamber containing the inner housing.

Abstract: An integrated turbomachine is described, comprising: a casing; an electric motor and a driven turbomachine component housed in the casing; a rotating shaft drivingly connecting the electric motor and the driven turbomachine component; a thrust bearing and a radial bearing rotatingly supporting the shaft; an axial locking device housed inside the casing, for applying a thrust to the shaft, parallel to the rotation axis (A-A) of the shaft, and comprised of an actuator member, configured to selectively activate and/or deactivate the axial locking device.

Abstract: A system is provided. The system includes a body having at least two surfaces. The body is configured to be located at least partially below a surface of a body of water moving in a first direction. The system includes a mechanical system connected to the body. The mechanical system is configured to allow the movement of the body of water in the first direction to move the body back and forth in a plane parallel to the surface of the body of water in a second direction and a third direction. The second and the third directions are substantially perpendicular to the first direction. The mechanical system is configured to translate the movement of the body to a rotor of an electrical generator.

Abstract: The invention relates to a rotor blade of a wind power plant having two rotor blade half-shells (1, 21) with in each case a leading-edge periphery and a trailing-edge periphery (8a, 22a), which rotor blade half-shells are adhesively fastened to each other along the leading-edge and trailing-edge peripheries (8a, 22) and which in case have a trailing-edge girder (3, 25), and each of the trailing-edge girders (3, 25) at least in certain sections is of rectangular design in a cross section along its longitudinal extent.

Abstract: An advertising board-type sail-type rail-type pneumatic device comprises four portions: the first portion is a driving body portion including blades (1) and fixed seats (5); the second portion is a control portion including angle locks (6), bearings (3), one-way gears (4), one-way guide teeth (7), synchronous rods (8) and synchronous gears (9); the third portion is a transmission portion including chains (12) and rolling wheels (13); the fourth portion is a supporting portion including rails (11), synchronous rod brackets (10) and supporting columns (14). The pneumatic device has the function of outdoor advertising board and wind power generation, so that it can both supply daily power to buildings and produce advertising income. The components of blades (1), fixed seats (5), rails (11), synchronous devices, chains (12), angle locks (6), one-way guide teeth (7) and the like of the pneumatic device are also disclosed.

Abstract: The present subject matter is directed to a system and method for detecting lifting of a ground brush of a generator of an electrical power system connected to a power grid so as to prevent damage to the electrical power system (e.g. bearing failure). The method includes monitoring, via at least one sensor, a voltage signal of a rotor shaft of the generator. The method also includes determining at least one characteristic (e.g. amplitude and/or frequency) of the voltage signal for a predetermined time period. Further, the method includes determining whether the at least one characteristic of the voltage signal is above a predetermined threshold, wherein the at least one characteristic of the voltage signal being above the predetermined threshold is indicative of the ground brush being lifted.

Abstract: A wind power generator system includes: a generator including a generator cavity; a separation device configured to perform multi-phase flow separation on an upwind direction flow and including an air inlet configured to introduce the upwind direction flow and an air outlet in communication with the generator cavity; and an exhaust fan in communication with the generator cavity and configured to exhaust hot air flow in the generator cavity. A fluid transfer device includes: a power equipment including an overheated cavity; a separation device configured to perform multi-phase flow separation on an upwind direction flow and including an air inlet and an air outlet; and an exhaust fan. With the wind power generator system and the fluid transfer device, the overheated cavity can be cooled by using air in the natural environment and the overheated cavity is prevented from being damaged.

Abstract: Solar power collection systems characterized by using a collimated or otherwise concentrated beam (201) of solar radiation to directly heat a porcelain or other high-heat capacity ceramic heating element (202) by contact with an absorption surface on the element, which element in turn heats a thermal storage medium (205) by conduction, methods of using the systems for collecting solar energy, and applications of the systems are disclosed.

Abstract: A variable-stiffness actuator, installed in a flexible member and capable of providing different stiffnesses for the flexible member, includes a shape-memory member that can transit in phase between first and second phases and an inducing member that causes phase transition between the first and second phases into the shape-memory member. The shape-memory member takes, in the first stare, a flexible state in which it is easily deformable by an external force, so as to provide lower stiffness for the flexible member, and, in the second stare, a rigid state in which it tends to take a memorized shape against an external force, so as to provide higher stiffness for the flexible member. The actuator further includes a stiffness calculator that calculates the stiffness of the actuator.

Abstract: A propulsion system for spacecraft is based on an electric engine that expels propellant to achieve thrust. The propellant is first ionized to generate a plasma. Plasma particles are selectively accelerated via a pulsed laser that accelerates predominantly the electrons in the plasma. The electrons are expelled first, forming a space charge that acts as a virtual cathode to accelerate the positive ions. Interactions between the laser beam and plasma electrons are predominantly through the ponderomotive force.

Abstract: A hydraulic pump system includes a power source that generates power at a level and is capable of modifying the level. A hydraulic pump is coupled to the power source to receive power and includes an output through which fluid can be displaced at a rate that can be controlled by a solid-state actuator coupled to the hydraulic pump. A fluid line is in fluid communication with the output of the hydraulic pump and fluid can be displaced through the fluid line in a direction, which can be reversed.

Abstract: An electric control valve for a coolant compressor comprises a valve housing, an electric actuating drive, a valve body displaceable by the electric actuating drive between a first position and a second position inside the valve housing, a position sensor determining a position of the valve body, a suction-pressure sensor, and a control system. The control system is adapted to control a coolant flow from a high-pressure region into a crankcase-chamber-pressure region of the coolant compressor by controlling the position of the valve body via the electric actuating drive based on the suction pressure received from the suction-pressure sensor. The control system moves the valve body to the first position to connect the high-pressure region and the crankcase-chamber-pressure region if the suction pressure is below a predetermined threshold.

Abstract: A method of compressing a gas includes pumping, using a pump, at least a portion of a liquid contained in a first chamber to a second chamber containing a gas at a first pressure such that the portion of the liquid pumped into the second chamber compresses the gas in the second chamber to a second pressure greater than the first pressure, wherein the portion of the liquid pumped into the second chamber is admitted into the second chamber so that the admitted liquid flows along an internal surface of the second chamber.

Abstract: A pump system includes a positive displacement pump, such as a diaphragm pump, an electric motor directly coupled to the positive displacement pump, and a programmable controller configured to maintain a desired current to the electric motor. The programmable controller is adapted to sense the current to the motor and to maintain constant current. It has been found that constant current provides constant torque and constant torque achieves constant fluid discharge pressure from the pump. The programmable controller utilizes an absorbed power formula to determine the correct current to achieve the necessary torque for a desired fluid discharge pressure. The programmable controller includes a power saving mode with minimal current and the pump is “dead headed” with no flow. The system is operated with a method that maintains constant fluid discharge pressure as well as having a power saving mode.

Abstract: A control system and method of a VFD-based pump are disclosed. The control system controls an electric motor via a VFD, and the electric motor drives the pump. The control system comprises: an anti-ripple injection module for injecting an anti-ripple signal into a control path, the anti-ripple signal causing pressure ripples in the pump output to he at least partially cancelled. Further disclosed is a pump system, comprising: a VFD, an electric motor, and a pump, wherein the VFD comprises the control system stated above.

Abstract: A method for high fluid shear processing of a fluid uses an isolator that has a first sub-chamber for containing a first fluid and a second sub-chamber for containing a second fluid defined by a separator positioned in the chamber and movable between a first end of the chamber and a second end of the chamber. The two sub-chambers are in pressure communication with each other but are not in fluid communication with each other. A first fluid is pumped at an ultrahigh pressure into the first-sub chamber, and the pressure in the first sub-chamber causes a second fluid to be processed to be discharged from the second sub-chamber into a processing valve. A system is also provided for performing the steps of this method.

Abstract: A co-rotating scroll compressor is provided in which a bearing configured to support a scroll is displaced by a torque repulsive force, which is applied to the bearing due to compression repulsion of a compressed fluid, the torque repulsive force is converted into a sealing force of compression pockets, which are defined by wraps of co-rotating scrolls such that the sealing force of the compression pockets is increased, and in which a bearing housing is rotatably installed in a housing accommodation hole, a rotational center of a second scroll is positioned at a position eccentric from a rotational center of a bearing housing, the bearing housing is rotated by the torque repulsive force applied to the second scroll, some of the torque repulsive force is converted into the sealing force against a sealing disturbing force, and thus, the wrap of the second scroll is pressed against the wrap of the first scroll by the sealing force.

Abstract: A co-rotating scroll compressor is provided in which pressure differences between inner and outer portions of a suction chamber are maintained, back pressures are applied to rear surfaces of end plates of a drive scroll and a driven scroll in directions in which the two scrolls are moved toward each other to prevent compression leakage of a fluid, and a lubricant oil is easily supplied to the two scrolls using the back pressures. The co-rotating scroll compressor may include pressure seals between the rear surfaces of the end plates of the drive scroll and the driven scroll and an inner wall of the suction chamber such that the two scrolls are pressed in directions to be moved toward each other by the back pressures, and the oil is supplied to rotary supports and close contact portions of the two scrolls using the back pressures.