摘要:
An air-fuel ratio control apparatus is applied to an internal combustion engine including a variable lift mechanism which changes a lift amount of an intake valve. An oxygen sensor, which outputs a signal indicating an oxygen concentration in exhaust gas, is provided downstream of an exhaust gas purification catalyst in an exhaust passage of the internal combustion engine. Air-fuel ratio control is performed to correct the fuel injection amount command value using the correction amount that is set based on the value output from the oxygen sensor. The relationship among the deviation of the correction amount from its reference value, the learned small lift value, the learned medium lift value, and the lift amount is learned. The learned deviation value is calculated based on the lift amount, using the learned relationship. Then, the fuel injection amount command value is corrected by the correction amount including the calculated learned deviation value.
摘要:
A tangential grinding resistance measuring method includes obtaining an abrasive grain section area which is at a predetermined infeed depth from the highest top surface of abrasive grains on a grinding wheel; calculating the tangent of a half vertex angle of a conical model for cutting edges of the abrasive grains which model takes the abrasive grain section area as its bottom surface and the predetermined depth as its height; setting grinding parameters; and calculating a tangential grinding resistance from the grinding parameters and the tangent.
摘要:
A grinding machine is provided with first and second grinding wheels selectively used in dependence on the steps of machining operations. The second grinding wheel is grooved so that at least one oblique groove vertically crosses a contact surface on which a grinding surface of the second grinding wheel contacts with a workpiece, and thus, is capable of releasing a dynamic pressure in coolant generated between the grinding surface and the workpiece since coolant supplied from over the contact surface flows out from both of the upper and lower sides of the contact surface through the at least one oblique groove. Since it does not occur that fluctuations in the dynamic pressure generated in coolant cause the distance between the second grinding wheel and the workpiece to be varied, the accuracy in grinding the workpiece with the second grinding wheel can be enhanced.
摘要:
An injection apparatus having a mechanism wherein an object is advanced and retracted by a plurality of shafts 23, 24, the injection apparatus includes: a plurality of axial force detection parts 27, 28 configured to detect an axial force of each of the shafts 23, 24; and a control part 40 configured to compare detection values detected by the axial force detection parts 27, 28, the control part 40 being configured to calculate an amount of operation of a position of a shaft to be operated in the plurality of the shafts 23, 24 based on a difference of the axial forces of the shafts 23, 24 indicated by the detection values so as to correct the position, the control part 40 being configured to cancel the difference of the axial forces.
摘要:
If it is determined that an engine has been started, an engine coolant temperature is detected. If the engine coolant temperature is equal to or lower than a threshold value, the catalyst quick warm-up control is started to retard ignition timing, and a signal indicating a command to increase an operate angle is transmitted to a VVLA controller. When a VVT hydraulic pressure is increased to a predetermined value, a signal indicating a command to decrease the operate angle is transmitted to the VVLA controller, and a signal indicating a command to advance open timing of an intake valve is transmitted to a VVT controller so that the open timing of the intake valve is not changed. If the engine coolant temperature is equal to or higher than a threshold value, the catalyst quick warm-up control ends, and the ignition timing is returned to normal timing.
摘要:
In a nuclear magnetic resonance spectrometer, the shape of a detection coil is changed from a conventional cage type to a solenoid type of higher sensitivity. Accordingly, differing from the conventional superconductive magnet of multilayer air core solenoids, a superconductive magnet is right and left divided to split magnets for generating 11 T, preferably, 14.1 T in the horizontal direction, and the magnetic field uniformity is set to 0.001 ppm or less and the temporal stability is set to 0.001 ppm or less.
摘要:
A magnet for an NMR analyzer includes a superconductor coil for generating a magnetic field in a magnetic space surrounded by the superconductor coil. The superconductor coil has a shim coil group disposed at least one of inside and outside of the superconducting coil. The superconducting coil provides a first access port for receiving a probe inserted into the magnetic space along a central axis thereof and a second access port having one end for receiving a sample tube containing a sample inserted into the magnetic space in a direction transverse to the central axis of the magnetic space. The second access port is open at an other end thereof.
摘要:
The present invention provides a hydraulic excavator provided with a dozer device comprising an arm having a rear end connected to a fulcrum portion provided on a lower frame of a lower traveling body, a dozer blade provided at an extreme end of the arm, and a dozer cylinder for swinging the arm in vertical direction, characterized in that the dozer cylinder and the arm are arranged in a state of forming two sides of a triangle as viewed from the side, the arm swings vertically so that the dozer cylinder does not interfere with a bottom of an upper rotating body rotatably mounted on the lower traveling body, and an approach angle when the dozer blade vertically moved by the arm is placed in the highest position is set to 35 degrees or more, thereby capable of securing travelability equal to an excavator without a dozer device.
摘要:
A superconducting magnet device configured for an NMR spectrometer includes a split type superconducting magnet having left and right solenoid superconducting magnets, wherein the split type superconducting magnet has a center space around a vertical center axis between the left and right solenoid superconducting magnets, a sample tube placed in the center space in order to enable placement of a sample therein, which is energized by the magnetic field generated by the split type superconducting magnet, a solenoid coil configured for detecting signals due to magnetic resonance from the energized sample, and a permanent current switch for holding the split type superconducting magnet to a permanent current mode.
摘要:
To access a measurement space located at the center of the magnet, an access port is provided in the direction of the magnet's axis, a clearance is provided in the coil winding portion, and another access port passes through the clearance so that a sample can be positioned perpendicularly to the coil axis. According to this configuration, an access port passing through the coil winding portion can be smaller than the access port passing through the coil axis, a sample is inserted from the access port, and a probe is inserted from the access port passing through the magnet axis, and thus the clearance can be minimized.