Abstract: A vehicle control device includes a controller configured to allow cranking of an engine by increasing clutch torque at a time a deceleration request is detected during free running in which a vehicle is allowed to run in a state in which a clutch is disengaged and the engine is stopped, and makes an increasing rate of the clutch torque larger at a time when a negative pressure of a brake booster is small than at a time when the negative pressure of the brake booster is large.

Abstract: A vehicle control device includes a controller configured to allow cranking of an engine by increasing clutch torque at a time a deceleration request is detected during free running in which a vehicle is allowed to run in a state in which a clutch is disengaged and the engine is stopped, and make an increasing rate of the clutch torque larger at a time a negative pressure of a brake booster is small than at a time the negative pressure of the brake booster is large.

Abstract: A hydraulic shovel including a selection means for an engine which is capable of arbitrarily selecting either of an isochronous control and a droop control, and a traveling detection means for detecting the traveling state of a traveling device. The hydraulic shovel further includes a control means for the engine which selects the isochronous control when the traveling detection means detects the traveling state to maintain the rotational speed of the engine during rated operation while an output is increased, and selects the droop control when the traveling detection means does not detect the traveling state to set the rotational speed of the engine lower than that during the rated operation while the output is increased.

Abstract: An object is to provide a construction machine containing an engine (30) and a heat exchanger (31) in a bonnet (14), adapted for easy cleaning of a side of the heat exchanger (31) toward a cooling fan. A space (29) into which a hand can be put is provided between a cooling fan 33 attached to the engine (30) and the heat exchanger (31) arranged so as to face to the cooling fan (33). A part covering a region from the cooling fan (33) to the heat exchanger (31) in the bonnet (14) from above and sides includes a separate cover (34). An opening part having a guard (36) is provided through a portion of the cover (34), the portion facing to the heat exchanger (31). The cover (34) is configured to be openable and closable. The cooling fan (33) is adapted to be of a discharge type. A plurality of the heat exchangers are arranged in a same plane.

Abstract: An object is to provide a construction machine containing an engine (30) and a heat exchanger (31) in a bonnet (14), adapted for easy cleaning of a side of the heat exchanger (31) toward a cooling fan. A space (29) into which a hand can be put is provided between a cooling fan 33 attached to the engine (30) and the heat exchanger (31) arranged so as to face to the cooling fan (33). A part covering a region from the cooling fan (33) to the heat exchanger (31) in the bonnet (14) from above and sides includes a separate cover (34). An opening part having a guard (36) is provided through a portion of the cover (34), the portion facing to the heat exchanger (31). The cover (34) is configured to be openable and closable. The cooling fan (33) is adapted to be of a discharge type. A plurality of the heat exchangers are arranged in a same plane.

Abstract: [PROBLEMS] To easily realize an improvement in fuel economy and a reduction in noise during the operation of a hydraulic shovel while securing traveling performance. [MEANS FOR SOLVING THE PROBLEMS] This hydraulic shovel (1) includes a selection means (28) for an engine (2) which is capable of arbitrarily selecting either of an isochronous control and a droop control, and a traveling detection means (4) for detecting the traveling state of a traveling device (20). The hydraulic shovel further includes a control means (3) for the engine (2) which selects the isochronous control when the traveling detection means (4) detects the traveling state to maintains the rotational speed of the engine during rated operation while an output is increased, and selects the droop control when the traveling detection means (4) does not detect the traveling state to set the rotational speed of the engine lower than that during the rated operation while the output is increased.

Abstract: A hydraulic circuit of a excavating-and-slewing working vehicle, comprising: actuators for a boom, a bucket, slewing and an arm; directional control valves for the respective actuators; a pair of first and second hydraulic pumps for supplying pressure oil to the actuators through the respective directional control valves; a delivery oil passage of the first hydraulic pump tandem-connecting the boom directional control valve for boom to the bucket directional control valve for bucket on the downstream side of the boom directional control valve; a delivery oil passage of the second hydraulic pump tandem-connecting the slewing directional control valve for slewing to the arm directional control valve for arm.

Abstract: In an excavating/slewing work truck, the boom falls freely at the time of lowering operation without requiring any power but the flow rate of a pump increases excessively when the speed is balanced with other acutuators and power loss is inevitable for enhancing the operability. In order to eliminate this inconvenience, a first oil path (41) connecting a bottom side cylinder port (CB) and a tank port (T2), a second oil path (42) connecting a pump port (P2) and a rod side cylinder port (CR), and a third oil path (43) connecting a pump port (P1) and a tank port (T1) are provided, respectively, with first, second and third restrictors (61), (62) and (63) at the boom down position of a change-over valve (51) for the boom cylinder of an excavating/slewing work truck, wherein the first restrictor (61) restricts by such an amount as the work machine lowers gravitationally an the second restrictor (62) restricts by such an amount as the pressure on the boom side is not exceeded.

Abstract: A hydraulic circuit of an excavating and slewing working vehicle of two pump system, wherein a directional control valve for slewing and a directional control valve for arm are tandem-connected to the upstream side and downstream side of the delivery oil passage of a second hydraulic pump, respectively, a directional control valve for bucket are connected to the delivery oil passage of a first hydraulic pump, and then a bleed switching valve connected, through a check valve between the directional control valve for slewing and the directional control valve for arm and switched to connect to or disconnect from a tank on the upstream side of the check valve and the directional control valve for slewing are operated interlockingly with each other.

Abstract: A hydraulic circuit of a excavating-and-slewing working vehicle, comprising: actuators for a boom, a bucket, slewing and an arm; directional control valves for the respective actuators; a pair of first and second hydraulic pumps for supplying pressure oil to the actuators through the respective directional control valves; a delivery oil passage of the first hydraulic pump tandem-connecting the boom directional control valve for boom to the bucket directional control valve for bucket on the downstream side of the boom directional control valve; a delivery oil passage of the second hydraulic pump tandem-connecting the slewing directional control valve for slewing to the arm directional control valve for arm.

Abstract: In a working vehicle which includes left and right traveling devices, a pair of hydraulic traveling motors are installed to drive the respective traveling devices, and a pair of hydraulic directional control valves are provided for the respective hydraulic traveling motors in order to control the traveling of the vehicle. A throttle valve is provided in a pilot oil-passage, and connected to a drain oil-passage after passing serially through the pair of hydraulic directional control valves below the throttle valve. A pressure switch for warning the traveling state is operated by a pilot hydraulic pressure which is pressure of oil within an oil-passage between the throttle valve and an upstream one of the left and right hydraulic directional control valves.

Abstract: In an excavating/slewing work truck, the boom falls freely at the time of lowering operation without requiring any power but the flow rate of a pump increases excessively when the speed is balanced with other acutuators and power loss is inevitable for enhancing the operability. In order to eliminate this inconvenience, a first oil path (41) connecting a bottom side cylinder port (CB) and a tank port (T2), a second oil path (42) connecting a pump port (P2) and a rod side cylinder port (CR), and a third oil path (43) connecting a pump port (P1) and a tank port (T1) are provided, respectively, with first, second and third restrictors (61), (62) and (63) at the boom down position of a change-over valve (51) for the boom cylinder of an excavating/slewing work truck, wherein the first restrictor (61) restricts by such an amount as the work machine lowers gravitationally an the second restrictor (62) restricts by such an amount as the pressure on the boom side is not exceeded.

Abstract: A hydraulic circuit of an excavating and slewing working vehicle of two pump system, wherein a directional control valve for slewing and a directional control valve for arm are tandem-connected to the upstream side and downstream side of the delivery oil passage of a second hydraulic pump, respectively, a directional control valve for bucket are connected to the delivery oil passage of a first hydraulic pump, and then a bleed switching valve connected, through a check valve between the directional control valve for slewing and the directional control valve for arm and switched to connect to or disconnect from a tank on the upstream side of the check valve and the directional control valve for slewing are operated interlockingly with each other.

Abstract: An oiliness agent comprising a carboxylate of a composite metal hydroxide having a chemical composition represented by the following general formula (1), M2aM3x(OH)y(A)z.nH2O  (1) wherein, M2 indicates a divalent metal, M3 indicates a trivalent metal, A indicates an anion of an aliphatic carboxylic acid, a, x, y, and z are numbers satisfying the following formulas: a>0, 3x+2a−y−mz=0 (wherein m is a valency of anion A), 0.3≦a/x≦2.5 1.5≦y/(a+x)≦3.0 1.0≦(a+x)/z≦20.0, and n is a number not larger than 7. The oiliness agent exhibits excellent emulsifying properties such as dispersion stability and moisture retaining property without emitting odor and without a tendency of being colored, and is very useful for forming a water-in-oil emulsion which can be effectively used as a base material for cosmetics.

Abstract: In a working vehicle which includes left and right traveling devices, a pair of hydraulic traveling motors are installed to drive the respective traveling devices, and a pair of hydraulic directional control valves are provided for the respective hydraulic traveling motors in order to control the traveling of the vehicle. A throttle valve is provided in a pilot oil-passage, and connected to a drain oil-passage after passing serially through the pair of hydraulic directional control valves below the throttle valve. A pressure switch for warning the traveling state is operated by a pilot hydraulic pressure which is pressure of oil within an oil-passage between the throttle valve and an upstream one of the left and right hydraulic directional control valves.

Abstract: An oiliness agent comprising a carboxylate of a composite metal hydroxide having a chemical composition represented by the following general formula (1),