Abstract: A crankshaft with improved seizure resistance is provided. A crankshaft (10) is a crankshaft including journals (11) and pins (12), having a chemical composition of, in mass %: 0.35 to 0.40 % C; up to 0.70 % Si; 1.00 to 2.00 % Mn; up to 0.50 % Cr; up to 0.050 % Al; up to 0.020 % N; up to 0.020 % P; 0.005 to 0.200 % S; and balance Fe and impurities, each of the journals (11) and pins (12) having a surface microstructure containing tempered martensite in not less than 80 volume % and a surface hardness not higher than HV 450.

Abstract: A control device controls an internal combustion engine including: an elastic wave sensor arranged and configured to output a signal responsive to the strength of an acoustic emission wave produced at a sliding portion; and a variable oil pump. The control device is configured to execute an oil pressure control such that the oil pressure approaches a target oil pressure according to an engine operating condition. This oil pressure control includes a first pressure-increase processing executed where an AE correlation value correlated with the strength or occurrence frequency of the acoustic emission wave detected by the elastic wave sensor is greater than a first threshold value. The first pressure-increase processing increases the target oil pressure associated with a first engine operating condition present when the AE correlation value becomes greater than the first threshold value, as compared to when the AE correlation value is not greater than that.

Abstract: An object of this invention is to suppress the occurrence of pre-ignition by appropriately controlling a wall surface temperature of a combustion chamber based on a target temperature region in which the frequency with which pre-ignition occurs is reflected, without causing pre-ignition to actually occur. An ECU 50 acquires a wall surface temperature of a combustion chamber 14 or an engine water temperature or the like that correlates therewith as a wall temperature parameter. The ECU 50 is equipped with data for a pre-ignition suppression temperature region that is a region in which the pre-ignition occurrence frequency is smallest among temperature regions of the wall temperature parameter. In a pre-ignition susceptibility operating region A, the wall temperature parameter is controlled so as to fall within the pre-ignition suppression temperature region by operating a cooling water amount varying mechanism 38.

Abstract: An oil deterioration suppressing apparatus is provided. The apparatus may include a filtering portion including a filter element for filtering oil, and a deterioration suppressing portion including a powdery deterioration retarder which suppresses deterioration of oil. The deterioration suppressing portion may include a flow passage wall which holds the powdery deterioration retarder and defines an oil flow passage, and the powdery deterioration retarder includes mesoporous inorganic material.

Abstract: A control device controls an internal combustion engine including: an elastic wave sensor arranged and configured to output a signal responsive to the strength of an acoustic emission wave produced at a sliding portion; and a variable oil pump. The control device is configured to execute an oil pressure control such that the oil pressure approaches a target oil pressure according to an engine operating condition. This oil pressure control includes a first pressure-increase processing executed where an AE correlation value correlated with the strength or occurrence frequency of the acoustic emission wave detected by the elastic wave sensor is greater than a first threshold value. The first pressure-increase processing increases the target oil pressure associated with a first engine operating condition present when the AE correlation value becomes greater than the first threshold value, as compared to when the AE correlation value is not greater than that.

Abstract: A body of an oil jet is provided with: an oil supply port; a cylinder; and an oil injection port. A piston valve is accommodated in the cylinder. The piston valve forms in the cylinder a differential pressure room which is a closed compartment. In the piston valve, an orifice which makes the differential pressure room being communicated with a side of the oil supply port is formed. The piston valve is biased toward a position at which the oil injection port is closed by a spring. A first oil injection nozzle is connected to the oil injection port. A leak hole which allows oil to be leaked outside of the cylinder from the differential pressure room is open at the side surface of the cylinder. Further, a second oil injection nozzle is connected to the leak hole.

Abstract: An oil deterioration prevention device is provided that can prevent an increase in pressure loss by reducing oilflow resistance. The oil deterioration prevention device may include a filtering unit with a filter element that filters oil, and a deterioration prevention unit having a powdery deterioration prevention agent that prevents deterioration of oil, wherein out of oil fed from an oil containing unit, oil filtered by the filtering unit is fed to a part to be lubricated, and oil that is prevented from being deteriorated by the deterioration prevention unit is returned to the oil containing unit or sent to the part to be lubricated.

Abstract: An oil degradation suppressor according to one aspect of the present invention contains a reactant having an ability to adsorb a given component in an oil such as an acidic anion, and a gel-like material to hold the reactant. The reactant is preferably a hydrotalcite-like compound. The gel-like material contains a highly heat resistive gel and an amphiphilic solvent. A gel-like member containing the reactant and the gel-like material is disposed in a casing, and thereby an oil filter is provided. The gel-like material can work for supporting the reactant suitably.

Abstract: An oil additive includes a hydrotalcite-like compound, and a radical trapping agent having a melting point of 130° C. or higher.

Abstract: An oil deterioration suppressing apparatus for an internal combustion engine comprises a first oil filter and a second oil filter, wherein the first oil filter comprises a first filter member for filtering oil from an oil pan in which oil is stored, and the second oil filter comprises a second filter member for filtering oil from the oil pan, and wherein the second filter member is made of a ceramic material and has a mean pore size smaller than the mean pore size of the first filter member.

Abstract: Provided is a sliding bearing that has a bearing inner peripheral surface covered by a resin overlay layer configured from a binder resin and a solid lubricant and/or hard substance, reduces the running-in time during an operation start, and can obtain the effect of increasing wear resistance and the effect of reducing friction. In the sliding bearing, halved members resulting from halving a cylinder parallel to the axial direction are disposed at the top and bottom, the inner peripheral surfaces of the top and bottom halved members are covered by a resin overlay layer configured from a binder resin and a solid lubricant and/or hard substance, and a fine groove is provided to an axial-direction end of the bottom halved member in the peripheral direction from the mating surface at the downstream side in the rotational direction to a predetermined bearing angle.

Abstract: Provided is a slide bearing with which friction can be reduced and the total amount of effluent oil can be reduced. In the slide bearing in which the halved members made by dividing the cylinder in two in the direction parallel to the axial direction are disposed vertically, the narrow grooves are provided at an end of the lower halved member in the circumferential direction from a mating surface on a downstream side of a rotation direction to a predetermined bearing angle and peripheral edge parts are provided outside the narrow grooves in an axial direction.

Abstract: An oil deterioration prevention device is provided that can prevent an increase in pressure loss by reducing oilflow resistance. The oil deterioration prevention device may include a filtering unit including a filter element that filters oil, and a deterioration prevention unit including a powdery deterioration prevention agent that prevents deterioration of oil, wherein the deterioration prevention unit includes a passage wall that retains the deterioration prevention agent and forms an oil passage.

Abstract: A lubricating oil composition for internal combustion engines of passenger and commercial four-wheeled vehicles is provided which can exhibit excellent fuel efficiency performance and wear resistance reliability. The lubricating oil composition includes a base oil and a complex polyester mixture. The base oil includes at least one of poly-?-olefin, an ester-based base oil, or a partially hydrogenated mineral oil. The complex polyester mixture includes a polyester obtained by condensing a polyhydric alcohol, a polycarboxylic acid, and a monohydric alcohol having an oxyalkylene group. The content of the complex polyester mixture is 0.01% by mass or more with respect to the total mass of the lubricating oil composition, the high-temperature shear viscosity (HTHS viscosity) at 150° C. is 1.0 mPa·s to 2.6 mPa·s, and the NOACK evaporation amount is 40% or less.

Abstract: Provided is a slide bearing with which friction-reducing effects are obtained and the total volume of effluent oil is limited. In a slide bearing an end of the narrow groove on a downstream side of the rotation direction is disposed at the position which is adjacent to a mating surface on the downstream side of the rotation direction and not communicated with the mating surface on the downstream side of the rotation direction and an end of the narrow groove on an upstream side of the rotation direction is disposed at the position which is the upstream side from the end on the downstream side of the rotation direction and is rotated by an angle no more than 90 degrees from the mating surface on the downstream side of the rotation direction.

Abstract: Provided is a sliding bearing that has a bearing inner peripheral surface covered by a resin overlay layer configured from a binder resin and a solid lubricant and/or hard substance, reduces the running-in time during an operation start, and can obtain the effect of increasing wear resistance and the effect of reducing friction. In the sliding bearing, halved members resulting from halving a cylinder parallel to the axial direction are disposed at the top and bottom, the inner peripheral surfaces of the top and bottom halved members are covered by a resin overlay layer configured from a binder resin and a solid lubricant and/or hard substance, and a fine groove is provided to an axial-direction end of the bottom halved member in the peripheral direction from the mating surface at the downstream side in the rotational direction to a predetermined bearing angle.

Abstract: Provided is a slide bearing with which friction-reducing effects can be obtained and the total volume of effluent oil can be limited. A slide bearing in which halved members made by dividing a cylinder in two in a direction parallel to the axial are disposed vertically, wherein narrow grooves are provided at the ends of the slide bearing in the axial direction, the narrow grooves extending in the circumferential direction from the mating surface on the downstream side of the rotation direction to a specified bearing angle is an angle rotated in the range of ?0 degree to ?90 degrees from the mating surface on the downstream side in the rotation direction (bearing angle of 180 degrees) towards the upstream side in the rotation direction. In other words, the bearing angle is the range of 180 degrees to 270 degrees.

Abstract: A method of producing a GaAs single crystal having high carrier concentration and high crystallinity and to provide a GaAs single crystal wafer using such a GaAs single crystal. In the method of producing a GaAs single crystal, a vertical boat method is performed with a crucible receiving a seed crystal, a Si material, a GaAs material serving as an impurity, solid silicon dioxide, and a boron oxide material, thereby growing a GaAs single crystal.

Abstract: A lubricating oil composition for internal combustion engines of passenger and commercial four-wheeled vehicles is provided which can exhibit excellent fuel efficiency performance and wear resistance reliability. The lubricating oil composition includes a base oil and a complex polyester mixture. The base oil includes at least one of poly-?-olefin, an ester-based base oil, or a partially hydrogenated mineral oil. The complex polyester mixture includes a polyester obtained by condensing a polyhydric alcohol, a polycarboxylic acid, and a monohydric alcohol having an oxyalkylene group. The content of the complex polyester mixture is 0.01% by mass or more with respect to the total mass of the lubricating oil composition, the high-temperature shear viscosity (HTHS viscosity) at 150° C. is 1.0 mPa·s to 2.6 mPa·s, and the NOACK evaporation amount is 40% or less.

Abstract: Provided is a control apparatus for an internal combustion engine which can favorably achieve a good balance between the prevention of an excessive increase in the piston temperature and the prevention of deterioration of various performances of the internal combustion engine as a result of execution of abnormal combustion suppression control, even when abnormal combustion occurs continuously or substantially continuously over a plurality of cycles. An in-cylinder pressure sensor (34) is provided to obtain the in-cylinder pressure P of an internal combustion engine (10). When continuous pre-ignition is detected using the in-cylinder pressure sensor (34), the control apparatus makes it more difficult for continuous pre-ignition suppression control to be executed when the Pmax at the time of pre-ignition is low than when the Pmax at the time of pre-ignition is high.