71results about How to "Improve control response" patented technology

A flow rate ratio control device having: a main channel (RM); branch channels (R1, R2) branching from the end of the main channel (RM); control valves (31, 32) respectively provided in the branch channels (R1, R2); flow rate measurement means for measuring the flow rate of the main channel (RM) and the flow rate of each of the branch channels (R1, R2); a valve control section (5) for controlling the a control valve (31) provided in one branch channel (R2) so that the pressure on the upstream side of the control valve (31) is a given target pressure and, only when the upstream-side pressure is near or not less than the target pressure, starting control of the other control valve (32) so that the flow rate ratios of the branch channels (R1, R2) are predetermined ratios; and a target pressure setting section (6) for setting the target pressure such that the smaller the flow volume is in the main channel (RM), the lower is the target pressure.

In a suspension control system, accelerations detected by acceleration sensors are differentiated by a differentiator to calculate acceleration derivative values. Based on these values, a target electrical current calculating section calculates a target electrical current that is supplied to an actuator which controls a damping force of a damper. Before a rolling or pitch angle occurs in the vehicle, the change of the rolling or pitch angle is predicted to control the damping force of the damper, thereby improving the response of rolling angle and pitch angle control to achieve, simultaneously, an accurate posture control and a satisfactory riding comfort. Because the target electrical current calculating section corrects the target electrical current of the actuator based on a damper speed obtained by differentiating a damper displacement, even when a large input is applied to the damper due to an unevenness of the road surface, a proper posture control is performed.

A vehicle-mounted electronic control apparatus can perform a variety of abnormality detections while reducing the control load of a microprocessor in the abnormality detection of a volatile backup memory that is backed up by an on-board battery. The apparatus includes a control CPU which is fed with power from a main power supply circuit upon closure of a power switch, a nonvolatile control memory and a backup memory. Even if the power switch is opened, the backup memory, being a partial area of a RAM memory, is fed with power through an auxiliary power supply circuit connected directly to the battery. When the battery is replaced with a new one and connected again, a power supply interruption monitoring memory is reset. At the start of operation of the control CPU, the backup memory is initialized based on reset information, and the power supply interruption monitoring memory is rewritten into a set state.

A vehicle stabilizing system, for motor vehicles in particular, includes a control unit in which a stabilization control algorithm is stored, a sensor system for detecting present actual values of vehicle state variables, and at least one actuator for implementing a stabilizing intervention when an unstable situation is detected. In order to be able to adapt the vehicle stabilizing system to different types of surfaces, a device is provided which supplies the control unit with information concerning the nature of the surface and at least one controller variable of the stabilization control algorithm is changed as a function of the supplied surface information.

A current load rate of an engine 10 is computed and a maximum absorption torque of at least one hydraulic pump 1, 2 is controlled so that the load rate is held at a target value. Engine stalling can be prevented by decreasing the maximum absorption torque of the hydraulic pump under a high-load condition. When an engine output lowers due to environmental changes, the use of poor fuel or other reasons, the maximum absorption torque of the hydraulic pump can be decreased without a lowering of the engine revolution speed. Further, the present invention is adaptable for any kinds of factors causing a lowering of the engine output, such as those factors that cannot be predicted in advance or are difficult to detect by sensors. In addition, because of no necessity of sensors, such as environment sensors, the manufacturing cost can be reduced.

A device for metering fluid flow is disclosed. The device includes a variable sized orifice defined by a fluid flow conduit and an element movable relative to the fluid flow conduit to vary a size of the orifice, a pressure sensor configured to determine a pressure differential across the orifice and generate a pressure signal, a positioning device configured to determine a position of the element relative to the conduit and generate a position signal, and a processor configured to determine the fluid flow rate using the pressure signal and the position signal. The system can directly control the adjustable valve or orifice. Alternatively, the system can move back and forth between a direct mode and a PID mode. When in a PID mode, the system employs a standard PID algorithm with a variable gain term. The system switches to direct mode when it is advantageous for the controller to directly change the valve position based upon the setpoint, and the input and output pressures.

A control apparatus used in a control system in which the cycle time of a time proportioning signal is long, for example, a temperature control system using a cooler. Even if a manipulation value MV with respect to the cooler is drastically changed along with change of a control target value SP, the activation timing of a time proportioning output section is reset with the changing timing, so that a time proportioning signal Ton is newly generated. Alternatively, with the changing timing, the time proportioning output section is reactivated to generate the deficiency of the time proportioning signal Ton according to an increasing amount of the manipulation value MV. As a result, the time proportioning signal Ton is changed with an excellent follow-up ability.

A flow ratio controller having: a main channel; branch channels branching from the end of the main channel; control valves respectively provided in the branch channels; a plurality of flow rate meters for measuring the flow rate of the main channel and the flow rate of each of the branch channels; a valve control section for controlling the control valve provided in one branch channel so that the pressure on the upstream side of the control valve is a given target pressure and, only when the upstream-side pressure is near or not less than the target pressure, starting control of the other control valve so that the flow rate ratios of the branch channels are predetermined ratios; and a target pressure setting section for setting the target pressure such that the smaller the flow volume is in the main channel, the lower is the target pressure.

Methods and systems for adaptively controlling process parameters in semiconductor manufacturing equipment. An embodiment provides for gain scheduling of PID controllers across recipe steps. One embodiment provides a method for controlling a chuck temperature during a semiconductor manufacturing process, the method employing a first set of proportional-integral-derivative (PID) values in a PID controller to control the chuck temperature at a first setpoint in a first step of a process recipe and employing a second set of PID values in the PID controller to control the chuck temperature at a second setpoint, different than the first setpoint, in a second step of the process recipe. The methods and systems provide reduced controller response times where process parameter setpoint between steps of a process recipe span a wide range.

A vehicle behavior control apparatus that generates a gyro moment based on the behavior of the vehicle includes i) a gyro which has a rotating body that is rotatably supported on a rotating shaft and a rotating body rotating portion that rotates the rotating body, ii) a vehicle speed detecting portion that detects the vehicle speed of the vehicle, and iii) a controller that changes the centrifugal force generated in the rotating body based on the detected vehicle speed.

In a vehicular driving force distribution system, a left or right torque distribution clutch is selectively engaged to lock a carrier member or a sun gear of a planetary gear mechanism, whereby torque can be distributed between left and right wheels. Also, if a differential limitation clutch is engaged to control relative rotation of the sun gear and the carrier member of the planetary gear mechanism, the planetary gear mechanism enters a locked state, so that the left and right wheels are integrated to perform differential limitation. By the arrangement of merely providing the differential limitation clutch, the differential limitation can be performed by simple control and moreover the control response is improved, as compared with the case where differential limitation is performed by controlling engagement forces of the left and right torque distribution clutches.

In a suspension control system, accelerations detected by acceleration sensors are differentiated by a differentiator to calculate acceleration derivative values. Based on these values, a target electrical current calculating section calculates a target electrical current that is supplied to an actuator which controls a damping force of a damper. Before a rolling or pitch angle occurs in the vehicle, the change of the rolling or pitch angle is predicted to control the damping force of the damper, thereby improving the response of rolling angle and pitch angle control to achieve, simultaneously, an accurate posture control and a satisfactory riding comfort. Because the target electrical current calculating section corrects the target electrical current of the actuator based on a damper speed obtained by differentiating a damper displacement, even when a large input is applied to the damper due to an unevenness of the road surface, a proper posture control is performed.

A curved passage constituting part of an exhaust gas recirculation passage is installed inside a suction passage in the downstream of an electronic control throttle valve, of which initial position is the fully opened position, and an exhaust gas recirculation flow control valve is installed in the cylindrical portion extending coaxially from the curved passage into a suction passage. The control valve is a butterfly valve driven by a motor via a reduction gear mechanism. In addition, the control valve opening is sensed by a sensor and cooled exhaust gas flow is sensed by a flow sensor at the outlet of an exhaust gas cooler, and the control of the control valve is based on these sensor signals.

A current load rate of an engine 10 is computed and a maximum absorption torque of at least one hydraulic pump 1, 2 is controlled so that the load rate is held at a target value. Engine stalling can be prevented by decreasing the maximum absorption torque of the hydraulic pump under a high-load condition. When an engine output lowers due to environmental changes, the use of poor fuel or other reasons, the maximum absorption torque of the hydraulic pump can be decreased without a lowering of the engine revolution speed. Further, the present invention is adaptable for any kinds of factors causing a lowering of the engine output, such as those factors that cannot be predicted in advance or are difficult to detect by sensors. In addition, because of no necessity of sensors, such as environment sensors, the manufacturing cost can be reduced.

A speed change control system for a hybrid vehicle comprised of a first motor-generator, a differential mechanism that distributes a power of an engine to the first motor-generator and to an output member and that changes an engine speed in accordance with a speed of the first motor-generator, and a second motor-generator that exchanges a torque with any of wheels. The speed change control system comprises: a first power control means that outputs a command for changing an engine power in a direction to expedite a change in an engine speed, at the beginning of a speed change for changing the engine speed stepwise; a first speed control means that continues controls of the first and the second motor-generators as before the speed change, during a period from a point at which the first power control means outputs the command for changing the engine power to a point at which a response delay of the engine elapses; a second speed control means that controls the first motor-generator in a manner such that the engine speed is changed in a direction to be changed by the change in the engine power, after a lapse of the response delay of the engine; and a second power control means that outputs a command for changing the engine power to a power to be achieved after the speed change, when the engine speed is changed substantially to a target speed to be achieved after the speed change.

A curved passage constituting part of an exhaust gas recirculation passage is installed inside a suction passage in the downstream of an electronic control throttle valve, of which initial position is the fully opened position, and an exhaust gas recirculation flow control valve is installed in the cylindrical portion extending coaxially from the curved passage into a suction passage. The control valve is a butterfly valve driven by a motor via a reduction gear mechanism. In addition, the control valve opening is sensed by a sensor and cooled exhaust gas flow is sensed by a flow sensor at the outlet of an exhaust gas cooler, and the control of the control valve is based on these sensor signals.

A damper includes a cylindrical housing, a rotor rotatably disposed in the housing and having a cylindrical shaft portion and a wing portion radially outwardly extending from the shaft portion, a control valve member disposed between the housing and the shaft portion to cover the wing portion, and a viscous fluid filled inside the housing. The wing portion has an asymmetric shape with respect to a rotational direction of the rotor relative to a straight line extending radially from the shaft portion. The wing portion includes a tip side surface, and a back end side surface. The control valve member includes a first inner surface facing a sloping surface parallel thereto, and a second inner surface facing a flat surface parallel thereto.

A vehicle-mounted electronic control apparatus can perform a variety of abnormality detections while reducing the control load of a microprocessor in the abnormality detection of a volatile backup memory that is backed up by an on-board battery. The apparatus includes a control CPU which is fed with power from a main power supply circuit upon closure of a power switch, a nonvolatile control memory and a backup memory. Even if the power switch is opened, the backup memory, being a partial area of a RAM memory, is fed with power through an auxiliary power supply circuit connected directly to the battery. When the battery is replaced with a new one and connected again, a power supply interruption monitoring memory is reset. At the start of operation of the control CPU, the backup memory is initialized based on reset information, and the power supply interruption monitoring memory is rewritten into a set state.

An electronic thermostat apparatus for controlling a temperature of a coolant of an engine in a vehicle may include a housing connected to a plurality of flow paths through which the coolant of the engine flows, a wax case installed inside the housing and provided with a wax accommodation space therein, a glow plug heater inserted in a wax filled inside the wax accommodation space and configured to generate heat by receiving an external power, a driving body engaged to the wax case and moving according to deformation of the wax by the heat of the glow plug heater, a main valve engaged to the driving body and configured to open / close a radiator-side flow path by a movement of the driving body, and an elastic member elastically biasing the main valve to the radiator-side flow path.

In a control system and a control method, an electronic control unit is configured to crank an engine by setting a clutch to a half engaged state in a state where operation of the engine is stopped during traveling. The half engaged state is a state where the clutch is engaged with a slip. The electronic control unit is configured to, after a rotation speed of the engine has reached an ignition permission rotation speed or higher, increase a transmitted torque capacity of the clutch to a transmitted torque capacity that satisfies the following conditions i) and ii): i) the transmitted torque capacity is larger than a transmitted torque capacity before the rotation speed of the engine has reached the ignition permission rotation speed; and ii) the transmitted torque capacity allows the clutch to be kept in the half engaged state.

In order to provide an engine oil supply apparatus including a second oil pump (12) which can draw in and discharge oil quickly regardless of whether or not a first oil pump (11) is driven and which does not need to be large, an engine oil supply apparatus (Y) includes a first oil pump (11) drawing oil through a first oil passage (21) from an oil holder (13) holding oil, a second oil pump (12) connected in series with the first oil pump (11) through a connection oil passage (26) and driven independently of the first oil pump (11), a first supply oil passage (23) for supplying oil to a first circulation section (41) from the first oil pump (11), and a second supply oil passage (24) for supplying oil to a second circulation section (42) from the second oil pump (12). In the engine oil supply apparatus (Y), a first oil reservoir (15) holds oil to be supplied to the second oil pump (12) and is provided independently of the oil holder (13) is provided.

An engine air intake manifold has two main body sections that are divided along an airflow direction and mated tightly against each other at oppositely facing mating parts so as to form an air intake passage therein. A gas passage is formed along the mating parts. The gas passage opens into a downstream portion of the air intake passage and supplies a secondary additive gas thereto. Preferably, the engine air intake manifold has air intake branch pipes with valve mounting blocks for mounting air intake control valves to a downstream portion of the air intake branch pipes.

According to a control device for a hydraulic winch of the present invention, a regulator controls a motor capacity of a hydraulic motor having variable capacity functioning as a driving source of the hydraulic winch in response to a load pressure, a negative brake stops and retains the hydraulic motor at an automatic shutoff for prevention of overloading, and a controller sends signals to the regulator via a regulator-controlling valve at the automatic shutoff to set the motor capacity at a large value. Thus, the delay to recover the motor capacity at the time of returning from the automatic shutoff that is activated during winding-up of a load does not occur, and a control response is increased.

A clutch control device is provided for a 4-wheel drive vehicle. The clutch control device includes a 4WD control unit that controls the engagement and release of a friction clutch and a dog clutch which are arranged separately in the two paths. The 4WD control unit has a synchronization speed control unit, and at a time of transition from a disconnected, two-wheel drive mode, in which the friction clutch and the dog clutch are released, to a connected, four-wheel drive mode, in which the friction clutch and the dog clutch are engaged, the synchronization speed control unit reduces a synchronization speed of the dog clutch more during vehicle deceleration than when the vehicle is not decelerating.

In a vehicular driving force distribution system, a left or right torque distribution clutch is selectively engaged to lock a carrier member or a sun gear of a planetary gear mechanism, whereby torque can be distributed between left and right wheels. Also, if a differential limitation clutch is engaged to control relative rotation of the sun gear and the carrier member of the planetary gear mechanism, the planetary gear mechanism enters a locked state, so that the left and right wheels are integrated to perform differential limitation. By the arrangement of merely providing the differential limitation clutch, the differential limitation can be performed by simple control and moreover the control response is improved, as compared with the case where differential limitation is performed by controlling engagement forces of the left and right torque distribution clutches.

Methods and systems for adaptively controlling process parameters in semiconductor manufacturing equipment. An embodiment provides for gain scheduling of PID controllers across recipe steps. One embodiment provides a method for controlling a chuck temperature during a semiconductor manufacturing process, the method employing a first set of proportional-integral-derivative (PID) values in a PID controller to control the chuck temperature at a first setpoint in a first step of a process recipe and employing a second set of PID values in the PID controller to control the chuck temperature at a second setpoint, different than the first setpoint, in a second step of the process recipe. The methods and systems provide reduced controller response times where process parameter setpoint between steps of a process recipe span a wide range.

A hydraulic control unit is provided. A valve is comprised of a piston having a valve element, a cylinder holding the piston while allowing to reciprocate axially, a positive pressure chamber formed on one side of the piston to which pressure to open the valve is applied, a back pressure chamber formed on the other side of the piston to which the pressure to close the valve is applied, and a connection passage for differentiating pressures in the positive pressure chamber and the back pressure chamber. A pilot valve selectively connects the back pressure chamber with a site where the pressure is lower than that of the back pressure chamber. Hydraulic pressure lower than that applied to positive pressure chamber is applied to a low pressure section. The hydraulic control unit comprises a means to deliver the fluid from the low pressure section to the back pressure chamber if an opening motion of the valve is slower than a predetermined reference value, by opening the pilot valve to connect the back pressure chamber with the low pressure section.

A control apparatus for a vehicular power transmitting system includes a power transmission switching portion configured to selectively establish a first drive mode by placing one of the first and second coupling elements in an engaged state, a second drive mode by placing the other of the first and second coupling elements in an engaged state, or a third drive mode by placing both of the first and second coupling elements in the engaged states. The power transmission switching portion switches the vehicular power transmitting system between the first and second drive modes through the third drive mode, where a predetermined condition is not satisfied, and switches the vehicular power transmitting system between the first and second drive modes with concurrent engaging and releasing actions of the first and second coupling elements, where the predetermined condition is satisfied.