Abstract: A catalyst overheat prevention apparatus has a temperature obtaining portion that estimates a convergence temperature of a catalyst provided in the exhaust system of an internal combustion engine and the present temperature of the catalyst. The catalyst overheat prevention apparatus also has a fuel increment calculation portion, a comparison portion, a correction portion, and a fuel increment setting portion, which are used to execute OT fuel increase control when the convergence temperature and present catalyst temperature obtained by the temperature obtaining portion are equal to or higher than an OT determination temperature. The catalyst overheat prevention apparatus also has a present temperature correction portion that corrects the present catalyst temperature to be equal to the OT determination temperature when the present catalyst temperature is equal to or higher than the OT determination temperature and the convergence temperature is equal to the OT determination temperature.

Abstract: The invention provides a grease composition for constant velocity joint containing the components (a) to (g) below and a constant velocity joint containing said composition. (a) a diurea thickening agent having the following formula (1): R1NH—CO—NH—C6H4-p-CH2—C6H4-p-NH—CO—NHR2??(1) wherein R1 and R2 may be the same or different and represent C8-C20 alkyl groups, (b) an ester synthetic oil, (c) a mineral oil and/or a synthetic hydrocarbon oil, (d) a molybdenum dialkyldithiocarbamate, (e) molybdenum disulfide, (f) a polytetrafluoroethylene, and (g) a zinc dithiophosphate compound. The grease composition of the invention reduces variations in rotational resistance of the constant velocity joint at a low temperature.

Abstract: A grease composition for constant-velocity joints which is inexpensive and which and which has an improved anti-flaking property without using materials which have environmental burdens, and a constant-velocity joint enclosing this grease are provided. A grease composition for constant-velocity joints comprising: (a) a base oil, (b) a diurea thickener, (c) a zinc dialkyldithiophosphate, (d) a sulfurized molybdenum dialkyldithiocarbamate, (e) a zinc dialkyldithiocarbamate, and (f) a sulfur-nitrogen extreme pressure additive is provided.

Abstract: The invention provides a grease composition for constant velocity joint containing the components (a) to (g) below and a constant velocity joint containing said composition. (a) a diurea thickening agent having the following formula (1): R1NH—CO—NH—C6H4-p-CH2—C6H4-p-NH—CO—NHR2??(1) wherein R1 and R2 may be the same or different and represent C8-C20 alkyl groups, (b) an ester synthetic oil, (c) a mineral oil and/or a synthetic hydrocarbon oil, (d) a molybdenum dialkyldithiocarbamate, (e) molybdenum disulfide, (f) a polytetrafluoroethylene, and (g) a zinc dithiophosphate compound. The grease composition of the invention reduces variations in rotational resistance of the constant velocity joint at a low temperature.

Abstract: In an internal combustion engine that includes a first secondary air supply unit having a first air pump and a first air switching valve and a second secondary air supply unit having a second air pump and a second air switching valve, a time difference is provided between the operation start timing of the first air pump and the operation start timing of the second air pump, and the open timing of the first air switching valve and the open timing of the second air switching valve are set so as to be simultaneous with each other.

Abstract: A control device for an internal combustion engine with a catalyst includes: an air-fuel ratio control unit varying a fuel amount supplied to the engine in accordance with a first variation amount set such that an air-fuel ratio of air-fuel mixture coincides with a target ratio; and an exhaust gas temperature control unit varying a fuel amount supplied to the engine in accordance with a second variation amount set to decrease an exhaust gas temperature. When air-fuel ratio control is being executed at a first time point and at least exhaust gas temperature control is executed during a period from the first time point or later to a third time point thereafter, the first and second variation amounts at a fourth time point in the period are set so as to be larger than or equal to the first variation amount at the first time point.

Abstract: The present invention provides a grease composition for use in a constant velocity joint, which is excellent in the resistance to flaking. The grease composition comprises the following components (a) to (d): (a) a base oil; (b) a thickener; (c) an organic molybdenum compound; and (d) at least one compound selected from the group consisting of oxides of divalent typical metals having a Mohs hardness lower than that of the steel and compounds of the foregoing divalent typical metals, which can immediately be converted into the corresponding oxides of these metals having a Mohs hardness lower than that of the steel under the boundary lubrication conditions. In particular, the present invention relates to a grease composition for use in a constant velocity joint, wherein the component (d) is zinc oxide or zinc carbonate and wherein the component (c) is molybdenum dithiocarbamate.

Abstract: A catalyst overheat prevention apparatus has a temperature obtaining portion that estimates a convergence temperature of a catalyst provided in the exhaust system of an internal combustion engine and the present temperature of the catalyst. The catalyst overheat prevention apparatus also has a fuel increment calculation portion, a comparison portion, a correction portion, and a fuel increment setting portion, which are used to execute OT fuel increase control when the convergence temperature and present catalyst temperature obtained by the temperature obtaining portion are equal to or higher than an OT determination temperature. The catalyst overheat prevention apparatus also has a present temperature correction portion that corrects the present catalyst temperature to be equal to the OT determination temperature when the present catalyst temperature is equal to or higher than the OT determination temperature and the convergence temperature is equal to the OT determination temperature.

Abstract: A catalyst temperature estimating device that estimates the temperature of an upstream end of a catalyst for purifying exhaust gas of an internal combustion engine in an exhaust gas flow direction by executing a smoothing process for upstream end temperature estimation; the temperature of a downstream end of the catalyst in the exhaust gas flow direction by executing either a downstream end temperature estimation process using the estimated upstream end temperature with a smoothing process for downstream end temperature estimation; and calculates a smoothing coefficient for the estimated downstream end temperature used to smooth the estimated downstream end temperature based on the operation state of the internal combustion engine.

Abstract: A fuel injection control apparatus of the invention includes: a temperature acquisition portion that estimates the present temperature of a catalyst and the convergence temperature of the catalyst; an increase value calculation portion that calculates a base OT increase value that is an increase value for the fuel injection amount that a fuel injection valve provided in an internal combustion engine needs to inject, on the basis of the present temperature and the convergence temperature of the catalyst estimated by the temperature acquisition portion; a correction portion that calculates an OT increase correction-reflected value by correcting the base OT increase value on the basis of the present temperature and the convergence temperature if the present temperature is lower than the convergence temperature; and an increase value determination portion that selects one of the base OT increase value and the OT increase correction-reflected value as the OT increase value for the fuel injection amount that the fu

Abstract: The invention provides a grease composition that can improve the durability and the temperature control properties of constant velocity joints and reduce the rotating torque at low temperatures, and a constant velocity joint where the above-mentioned grease composition is packed. The grease composition for constant velocity joints includes (a) a base oil containing a synthetic oil, (b) a thickener, (c) zinc dithiophosphate, (d) molybdenum dialkyl dithiocarbamate sulfide, and (e) zinc dialkyl dithiocarbamate.

Abstract: A grease composition which provides, in the working range of 150° C. to ?40° C., an enhanced temperature control performance, a reduced low-temperature rotational torque and an improved boot resistance; and a constant velocity joint wherein the grease composition is filled; are provided. A grease composition for a constant velocity joint comprising the following components (A) to (E): (A) a base oil containing 10 to 95% by mass of an ester synthetic oil produced from an aliphatic alcohol and an aromatic carboxylic acid and 90 to 5% by mass of a synthetic hydrocarbon oil; (B) a thickener; (C) molybdenum disulfide; (D) molybdenum dialkyldithiocarbamate e; and (E) zinc dithiophosphate.

Abstract: During secondary air supply control, a secondary air supply system which supplies secondary air to an upstream side of an exhaust gas control apparatus obtains a secondary air flow rate supplied to an exhaust passage provided independently for each of a plurality of cylinder groups, and detects an abnormality in the secondary air supply system based on a noxious substance amount in exhaust gas discharged from the exhaust passages which is determined from the obtained secondary air flow rates.

Abstract: A grease composition for constant-velocity joints which is inexpensive and which and which has an improved anti-flaking property without using materials which have environmental burdens, and a constant-velocity joint enclosing this grease are provided. A grease composition for constant-velocity joints comprising: (a) a base oil, (b) a diurea thickener, (c) a zinc dialkyldithiophosphate, (d) a sulfurized molybdenum dialkyldithiocarbamate, (e) a zinc dialkyldithiocarbamate, and (f) a sulfur-nitrogen extreme pressure additive is provided.

Abstract: A grease composition which contains a large amount of thickener, and may prevent a flaking effectively for a long period of time, and machine elements in which the grease composition is filled are provided. A grease composition comprising a thickener and a base oil, characterized in that the thickener contains a diurea compound represented by the Formula (I): R1—NHCONH—R2—NHCONH—R3,??(I) wherein R1 and R3 are a phenyl group and/or a cyclohexyl group, R2 is a C6-C15 divalent hydrocarbon group, and the molar ratio of cyclohexyl group/(cyclohexyl group+phenyl group) in R1 and R3 is 0.95 to 0.10.

Abstract: The invention provides a grease composition for constant velocity joints and constant velocity joints in which the grease composition is packed. The composition comprises (a) a base oil comprising a synthetic oil; (b) a thickening agent; (c) a molybdenum sulfurized dialkyl dithiocarbamate; (d) a thiophosphate; and (e) a zinc sulfurized dialkyl dithiocarbamate. The composition can reduce low temperature rotational torque and folding torque in constant velocity joints while inhibiting deterioration of a boot material comprising a silicone rubber.

Abstract: A double sided optical disc includes a first record carrier having a light transmitting base board, a first reflecting layer formed on the base board and a first protective layer formed on the first reflecting layer; and a second record carrier having a light transmitting cover, a second reflecting layer formed on the cover and a second protective layer formed on the second reflecting layer. The first record carrier is united to the second record carrier through an adhesive layer for uniting the first protective layer to the second protective layer. The total thickness of the first record carrier and the second record carrier that are united together is not longer than 1.4 mm and the thickness of the light transmitting base board of the first record carrier is not shorter than 1.1 mm. Thus, recording surfaces having different specifications are provided on respective surfaces to improve a utility.

Abstract: The invention provides a grease composition for constant velocity joint containing the components (a) to (g) below and a constant velocity joint containing said composition. (a) a diurea thickening agent having the following formula (1): R1NH—CO—NH—C6H4-p-CH2—C6H4-p-NH—CO—NHR2 ??(1) wherein R1 and R2 may be the same or different and represent C8-C20 alkyl groups, (b) an ester synthetic oil, (c) a mineral oil and/or a synthetic hydrocarbon oil, (d) a molybdenum dialkyldithiocarbamate, (e) molybdenum disulfide, (f) a polytetrafluoroethylene, and (g) a zinc dithiophosphate compound. The grease composition of the invention reduces variations in rotational resistance of the constant velocity joint at a low temperature.

Abstract: In order to provide for a grease composition which has a good compatibility with boots made of rubber or thermoplastic elastomer, and which also gives low wear and low friction, a grease composition for use in constant velocity joints is suggested, comprising a) a base oil composition; b) at least one tri-nuclear molybdenum compound of the formula Mo3SkLnQz, wherein L are independently selected ligands having organo groups with a sufficient number of carbon atoms to render the compound soluble or dispersible in the oil, n is from 1 to 4, k varies from 4 though 7, Q is selected from the group of neutral electron donating compounds such as amines, alcohols, phosphines, and ethers, and z ranges from 0 to 5 and includes non-stoichiometric values; c) at least one urea derivative thickener.

Abstract: A double sided optical disc includes a first record carrier having a light transmitting base board, a first reflecting layer formed on the base board and a first protective layer formed on the first reflecting layer; and a second record carrier having a light transmitting cover, a second reflecting layer formed on the cover and a second protective layer formed on the second reflecting layer. The first record carrier is united to the second record carrier through an adhesive layer for uniting the first protective layer to the second protective layer. The total thickness of the first record carrier and the second record carrier that are united together is not longer than 1.4 mm and the thickness of the light transmitting base board of the first record carrier is not shorter than 1.1 mm. Thus, recording surfaces having different specifications are provided on respective surfaces to improve a utility.