Abstract: The server switching controller system of the present invention includes a first server (2) and a second server (3) connected to a common controller (30, 20) installed in a vehicle (50) via communication means (14, 15, 8, 9, 10, and 11) to freely communicate with each other with said first server (2) and said second server (3) each having a server ID and an address (ID1 and ID2) for identifying itself; and with the controller (30, 20) having a controller ID and an address ID3 corresponding to the first server ID or an address ID4 corresponding to the second server ID, respectively such that the controller (30, 20) in the vehicle 50 will be connected either to first server (2) or to the second server (3) based on the address of the first server (2) or second server (3) respectively and program means for switching the address setting in the controller to permit the controller to selectively communicate with either the first or second server so as to operate either in a normal mode or in an overwrite mode.

Abstract: A rewrite control apparatus capable of saving data which should not be reset, and rewriting a program of a large capacity on a memory of a small capacity. For this purpose, a data area (23b) for storing vehicle condition data is provided in a storage medium (23) of an onboard controller (35). When rewriting an onboard program, the apparatus writes the vehicle condition data into a storage area (23a) different from the data area, or a storage medium different from the storage medium (23) and save it, and executes the rewrite, and after finishing the rewrite, it writes the saved vehicle condition data back into the data area.

Abstract: The server switching controller system of the present invention includes a first server (2) and a second server (3) connected to a common controller (30, 20) installed in a vehicle (50) via communication means (14, 15, 8, 9, 10, and 11) to freely communicate with each other with said first server (2) and said second server (3) each having a server ID and an address (ID1 and ID2) for identifying itself; and with the controller (30, 20) having a controller ID and an address ID3 corresponding to the first server ID or an address ID4 corresponding to the second server ID, respectively such that the controller (30, 20) in the vehicle 50 will be connected either to first server (2) or to the second server (3) based on the address of the first server (2) or second server (3) respectively and program means for switching the address setting in the controller to permit the controller to selectively communicate with either the first or second server so as to operate either in a normal mode or in an overwrite mode.

Abstract: A rewrite control apparatus capable of saving data which should not be reset, and rewriting a program of a large capacity on a memory of a small capacity. For this purpose, a data area (23b) for storing vehicle condition data is provided in a storage medium (23) of an onboard controller (35). When rewriting an onboard program, the apparatus writes the vehicle condition data into a storage area (23a) different from the data area, or a storage medium different from the storage medium (23) and save it, and executes the rewrite, and after finishing the rewrite, it writes the saved vehicle condition data back into the data area.

Abstract: An inspection object imaging device, which images a plurality of objects to be inspected that are located at different imaging distances from imaging means, in which a light transmitting optical member which has a predetermined refractive index and a thickness and which absorbs the differences of the imaging distances is provided in an optical path between the objects to be inspected and the imaging means. When the objects whose optical path lengths from the imaging means are different are imaged by one imaging means, all the objects can be focused simultaneously, so that the time required for the imaging can be reduced and, further, a high quality image can be obtained over the whole imaged region.

Abstract: The present invention relates to an electrodeposited reamer tool (1) for use in precision bore processing.In this electroplated reamer tool (1), a work processing portion (3) in a reamer body is constituted by a finishing portion (4) having a cylindrical outer peripheral surface and a cutting portion (5) provided on the distal end side of the finishing portion (4) and having a tapered configuration, and abrasive grains (6) are electrodeposited on the outer peripheral surfaces of the finishing portion (4) and the cutting portion (5).In the electrodeposited reamer tool (1) is inserted into a prepared hole provided in a work, the prepared hole is enlarged by the cutting portion (5), and the inner surface of the bore is finished by the finishing portion (4).Accordingly, it is possible to form a precision bore of a predetermined inner diameter in a work without preprocessing the prepared hole with precision.

Abstract: A hydrostatic transmission with a pair of pump/motor connected in a closed loop state by a pair of hydrostatic circuit. The hydrostatic transmission comprises a differential pressure detecting means which detects the differential pressure between the circuits and a displacement correcting means which, in case an operation to establish a neutral status has been carried out, controls the displacement volume of the pump/motor on the side where the pumping action is carried out toward a direction in which the magnitude of this differential pressure is held within a set range.In case the set range is set to a value with which a vehicle cannot run, the phenomenon of creep running will not occur.

Abstract: A stepless speed reducer includes the mechanical power transmission lines for high speed and low speed, the two lines being selectively concluded to effect power transmission. When the working speed ratio comes near a predetermined critical speed ratio, the operation is maintained at the critical speed ratio while the pump motor for low speed is kept inoperative and no pressure difference exists between the transmission circuits, thereby transmitting power through the line for high speed.

Abstract: A hydromechanical transmission that can be used as an efficient, continuously variable transmission has a differential mechanism, a hydraulic transmission mechanism, a mode selector mechanism, a locking mechanism, and a clutch mechanism. The hydraulic transmission mechanism has two pump/motors one of which acts as a hydraulic pump when the other serves as a hydraulic motor, and vice-versa. The mode selector establishes either a low-speed more or a high-speed mode. When one of the two pump/motors operates at a low speed in a given range of higher speeds in the high-speed mode, the input/output shaft of the pump/motor is locked by the locking mechanism. When the locking mechanism is in operation, the other pump/motor operating at a higher speed is disconnected from the differential mechanism by the clutch mechanism.