Abstract: A travel motor hydraulic control system for a construction machine having a plurality of hydraulic pumps which supply individually pressurized fluid for a plurality of hydraulic travel motors and a plurality of flow control valves which control the flow rate of the pressurized fluid to be supplied to the motor during an ordinary work. A controller receives a control signal representative of a travel control lever stroke sensed by a position sensor and a control signal detected by a pressure sensor, determines if the vehicle is traveling up a slope, and transmits a command signal to a solenoid operated valve to move a pilot operated shut off valve toward a valve-closing position, thereby the travel hydraulic motors are individually supplied the pressurized fluid from the hydraulic pumps.

Abstract: A hydraulic excavating mobile machine comprises a working implement at least two parts of which is operated by respective hydraulic actuators (hydraulic cylinders 2 and 3), pressure control valves 6 and 7 provided in pressurized fluid supply lines 4 and 5 to the actuators and connected to operating levers 11 and 12, respectively, pressure compensating valves 10 and 10a provided between the pressure control valve 6 and the one hydraulic actuator (the hydraulic cylinder 2) and between the pressure control valve 7 and the other actuator (the hydraulic cylinder 3), respectively, an operation mode selecting unit (a monitor 18) provided in a cab of the mobile machine, a controller 14 providing a control signal, and a variable pressure compensating value function storing unit provided in the controller 14.

Abstract: Disclosed herein are an imidazole derivative represented by the following general formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom, or an alkyl, alkoxy or alkoxycarbonyl group, and R.sup.2, R.sup.3 and R.sup.4 are the same or different from one another and are independently a hydrogen or halogen atom, an alkyl, halogenoalkyl, hydroxyl or alkoxy group, or the like, or a salt thereof, and a medicine comprising such a compound. The compound specifically suppresses the production of particular cytokine and is hence useful as an active ingredient for immune function modulators and the like.

Abstract: Described is a pyridine derivative represented by the following formula (1): ##STR1## wherein R.sup.1 and R.sup.2 individually represent H, an alkyl group, a cycloalkyl group, a hydroxyalkyl group, an alkoxyalkyl group which may have a substituent, a carboxyalkyl group, an alkoxycarbonylalkyl group, an aralkyl group which may have a substituent, a phenacyl group or an acyl group, R.sup.3 represents an alkyl group, a phenyl group which may have a substituent, a heteroaryl group or a cyclic amino group, X represents O or combination of OH and H, or a salt thereof; and a medicament, such as cytokine production suppressant, comprising the derivative or salt thereof as an effective ingredient. The invention compound has potential, highly specific and highly safe immunoregulating capacity so that it can suppress the excessive production of a specific cytokine in various diseases related to the immune system.

Abstract: A system for controlling fuel injection in an internal combustion engine such that when the target air-fuel ratio is switched from a rich value to a lean value, the air-fuel ratios are switched to the lean value by sequentially decreasing the amount of fuel injected into the cylinders, for example in a four cylinder engine into the #1, #2, #3 and #4 cylinders, with predetermined time differences. During this time, an electronic air control valve (EACV) is controlled in such a manner that it is stepwise opened with the switching of the air-fuel ratio s for the #1, #2, #3 and #4 cylinders, thereby causing the engine torque to remain the same to prevent the generation of a torque shock. When the target air-fuel ratio has been switched from the lean level to the rich level, the amounts of fuel injected into the #1, #2, #3 and #4 cylinders are controlled in such a manner that they are sequentially increased with predetermined time differences, and the EACV is controlled in such a manner that it is stepwise closed.

Abstract: A valve operating system in an internal combustion engine, that can be readily assembled and installed on the engine, including a casing coupled to an upper surface of a cylinder head, an armature, a pair of electromagnets for exerting electromagnetic forces on the armature in directions of opening and closing of an engine valve, and a pair of resilient means for biasing the engine valve in the opening and closing directions, respectively, and for retaining the armature at a predetermined neutral position by cooperation with each other during deenergization of both the electromagnets. The resilient means for closing the engine valve is mounted between a retainer fixed to the valve stem and a fixed position on the cylinder head, and the electromagnets are fixed within the casing which is constructed so that an upper portion of the stem can be inserted into the casing.

Abstract: A system for controlling fuel injection in an internal combustion engine such that when the target air-fuel ratio is switched from a rich value to a lean value, the air-fuel ratios are switched to the lean value by sequentially decreasing the amount of fuel injected into the cylinders, for example in a four cylinder engine into the #1, #2, #3 and #4 cylinders, with predetermined time differences. During this time, an electronic air control valve (EACV) is controlled in such a manner that it is stepwise opened with the switching of the air-fuel ratios for the #1, #2, #3 and #4 cylinders, thereby causing the engine torque to remain the same to prevent the generation of a torque shock. When the target air-fuel ratio has been switched from the lean level to the rich level, the amounts of fuel injected into the #1, #2, #3 and #4 cylinders are controlled in such a manner that they are sequentially increased with predetermined time differences, and the EACV is controlled in such a manner that it is stepwise closed.

Abstract: A system for controlling fuel injection in an internal combustion engine such that when the target air-fuel ratio is switched from a rich value to a lean value, the air-fuel ratios are switched to the lean value by sequentially decreasing the amount of fuel injected into the cylinders, for example in a four cylinder engine into the #1, #2, #3 and #4 cylinders, with predetermined time differences. During this time, an electronic air control valve (EACV) is controlled in such a manner that it is stepwise opened with the switching of the air-fuel ratios for the #1, #2, #3 and #4 cylinders, thereby causing the engine torque to remain the same to prevent the generation of a torque shock. When the target air-fuel ratio has been switched from the lean level to the rich level, the amounts of fuel injected into the #1, #2, #3 and #4 cylinders are controlled in such a manner that they are sequentially increased with predetermined time differences, and the EACV is controlled in such a manner that it is stepwise closed.

Abstract: The present invention is concerned with an apparatus for controlling a straight excavating operation with a hydraulic excavator such as a power shovel or the like machine including three working units, i.e., a boom, an arm and a bucket. When the straight excavating operation is performed, a hydraulic pressure of hydraulic oil in a hydraulic chamber on the boom lowering side of a boom cylinder is conducted to a drain tank while maintaining a predetermined set pressure, and a hydraulic pressure of hydraulic oil in a hydraulic chamber on the boom raising side of the boom cylinder is conducted to the drain tank via a check valve which serves to inhibit the hydraulic oil from flowing from the hydraulic chamber on the boom raising side of the boom cylinder to the drain tank, whereby the boom is held in the so-called floated state so as to enable a straight excavating operation to be performed merely by actuating the arm and bucket.

Abstract: A copying machine equipped with an automatic document feeding device has a document stacker on which a plurality of documents can be stacked, a feeding section in which a sheet of document is separated from plural documents stacked on the document stacker and is fed to an image reading section, a conveyance section in which the document fed to the image reading section is conveyed and is stopped at a predetermined image reading position and then the document, after being read, is conveyed, and a sheet-ejecting section which is located at the downstream side in the conveyance direction from the image feeding section and ejects the document fed out of the conveyance section to a delivery tray. A document trailing edge detector is provided on the document stacker, a pass of the trailing edge of the last document on the document stacker is detected, and detection signals therefrom are sent to a main body of the copying machine to control a sheet feeding of the sheet feeding section of the copying machine.

Abstract: An engine cooling system comprises a cooling water circulation circuit interconnecting an engine body and a radiator, a bypass circuit connected to the cooling water circulation circuit to bypass the radiator, an electric-powered water pump disposed in the cooling water circulation circuit adjacent an engine inlet, a flow rate control valve for controlling the flow rate of cooling water flowing through the radiator, an outlet water temperature detector for detecting an engine outlet water temperature in the cooling water circulation circuit, an inlet water temperature detector for detecting an engine inlet water temperature in the cooling water circulation circuit, and a control means for controlling the operation of the water pump in accordance with at least the engine outlet water temperature and controlling the operation of the flow rate control valve in accordance with at least the engine inlet water temperature to thereby properly control the temperature of the cooling water in accordance with the operat

Abstract: A plurality of pulse signals (trigger signals) responsive to driving of a power plant are directly supplied to respective adaptive control circuits each having an adaptive digital filter for controlling components of periodic or semi-periodic vibrations and noises ascribed to related component parts of a vibration/noise source. Further, the adaptive control is performed while varying a sampling frequency in response to changes in parameters of operating conditions of the power plant. Optionally, a control signal from the adaptive digital filter is corrected for gain. Further, periodic signal-eliminating means is provided for determining a transfer characteristic of a system to which the adaptive control is applied, based on a residual component signal from the periodic signal-eliminating means, a random signal having a low amplitude level, etc.

Abstract: Hydraulically-operated equipment such as travelling equipment or working equipment for use in construction machinery such as a power shovel, shoveldozer and bulldozer. The hydraulically-operated equipment comprises a hydraulic driving mechanism actuated by hydraulic pressure, a hydraulic pressure supplying device for supplying hydraulic pressure to a hydraulic pipeline system for the hydraulic driving mechanism and a controller for controlling the hydraulic pressure supplying device such that the supplying rate at which hydraulic pressure is supplied to the hydraulic pipeline system according to the supply of hydraulic pressure is decreased in a specified period after a dead zone period in which hydraulic pressure starts to rise. This arrangement prevents an operational lag in the hydraulic driving mechanism as well as a shock at the time of start-up and shut-down.

Abstract: A teaching and playback method for a work machine that is applicable to construction equipment such as a hydraulic excavator to automatize operation. Data on the operator's operation of work machine actuators is stored, and the stored data is reproduced so that the same operation as that by the operator is automatically performed. The method is adapted to effect exactly the same operation as what has been taught even when, during playback, the load on the actuators has varied from the level applied during the teaching. For this purpose, the pump discharge amount and the amounts of flow supplied to the actuators which are present during the teaching are stored. During playback, when the load has varied, and the pump discharge has changed, the engine output is controlled in such a manner that the actual pump discharge becomes equal to the amount stored during the teaching.

Abstract: Compositions suitable for use in the preparation of dosage-form active vitamins D.sub.3 are disclosed. Each composition comprises an active vitamin D.sub.3 and a stabilizer selected from polyvinylacetal diethylaminoacetate and hydroxypropylcellulose. Also disclosed are processes for the preparation of stable dosage-form active vitamins D.sub.3. Each process comprises adding the above stabilizer to an active vitamin D.sub.3 and then adding a pharmaceutically-acceptable carrier to the resultant mixture.

Abstract: A fuel injection control system is provided for use in a cylinder injection/spark ignition type internal combustion engine in which fuel is injected directly into cylinders through respective fuel injection valves mounted in the cylinder heads. An ECU determines a desired fuel injection amount based upon the engine rotational speed and an engine load condition, determines desired fuel pressure to be supplied to the fuel injection valves and controls the actual fuel supply pressure relative to the desired fuel pressure. The ECU causes fuel to be supplied under the desired fuel pressure to each of the fuel injection valves, based upon the engine rotational speed and injected thereby into the corresponding cylinder when the crank angle of the engine falls within a predetermined range in the vicinity of a top dead point of the cylinder corresponding to a compression stroke thereof. The predetermined crank angle range is set to a range of 20.degree. BTDC to 5.degree. ATDC.

Abstract: A composition for foaming preparation comprising (a) an organic acid of which the crystal surface is coated with a sugar and (b) a carbonate is disclosed. In the composition, an organic acid is completely shut off from a carbonate by a sugar coating so that the acid does not react with the carbonate over a prolonged storage time. When the composition is put into mouth, the sugar which covers the acid is readily dissolved, allowing the acid and the carbonate to react and to generate carbon oxide gas. An excellent foaming calcium preparation can be produced by using calcium carbonate as the carbonate or by adding other salt of calcium to the composition. Such a calcium preparation gives a good taste and favorable feeling upon administration. It is especially suitable for regular administration of calcium over an extended period of time.

Abstract: A hydraulic apparatus for a construction machine, which is adapted to prevent the number of revolutions of an engine from increasing when the flow of the fluid discharged by a variable displacement hydraulic pump driven by the engine is cut off. The hydraulic apparatus comprises a proportional solenoid (11) connected to a fuel supply control lever (13) so as to vary the horsepower characteristics of the engine, which are set by the action of a governor (12) based on manipulated variable of the fuel supply control lever (13) when the flow of the fluid discharged by said pump is cut off, and a controller (10) for controlling the proportional solenoid (11). In this apparatus, a decrement (.DELTA.Nr) in a target number of revolutions per minute (Nr) of the engine, which can be obtained by subtracting a target number of revolutions per minute (Nrb) of the engine at the desired engine horsepower characteristics (l.sub.

Abstract: An apparatus for controlling hydraulic pumps for a construction machine wherein the construction machine includes first and second hydraulic pumps adapted to be driven by an engine and hydraulic actuators hydraulically connected to the first and second hydraulic pumps via first and second actuating valves is disclosed. A controlling section calculates extra horse powers .DELTA.HP.sub.1 and .DELTA.HP.sub.2 based on reference allowable absorptive horse powers set relative to the first and second hydraulic pumps and actual absorptive horse powers (HP.sub.01) and (HP.sub.02) derived from the first and second hydraulic pumps. In addition, the controlling section calculates allowable discharge capacities (V.sub.1P) and (V.sub.2P) based on the number (N) of revolutions of the engines, pressures (P.sub.1) and (P.sub.2) of hydraulic oils discharged from the first and second hydraulic pumps, the extra horse powers .DELTA.HP.sub.1 and .DELTA.HP.sub.2 and allowable discharge capacities (V.sub.1P) and (V.sub.2P).

Abstract: A service valve circuit of a hydraulic excavator connected beforehand for use in controlling a special attachment in addition to a prescribed actuator control valve. The service valve circuit comprises a confluence valve 17 for performing electromagnetic proportional flow rate control, disposed in a confluence circuit 16 in communication with the section between inflow circuits 3F and 3R of two variable pumps 2F and 2R, an electrical switch 21 for switching the confluence valve 17 on or off according to a required flow rate and a volume 22 for adjusting the quantity of flow after passing through a confluence valve 17 in a range of flow for a maximum of one to two pumps. Since the requirement of confluence with respect to a required quantity of flow for a special attachment e and the quantity of confluence are set in advance, there will be no excess or shortage of the quantity of confluence.