Abstract: A method disclosed herewith is a method for producing a first seamless metal tube with a first wall thickness and a second seamless metal tube with a second wall thickness by using a three-roll-type inclined rolling mill, and the method includes a first inclination rolling step (#5), a setting changing step (#10), and a second inclination rolling step (#15). At the first inclination rolling step, a first workpiece is rolled by the inclined rolling mill. At the setting changing step, a setup condition of the inclined rolling mill is changed in a manner (a) or (b) as described below. At the second inclined rolling step, a second workpiece is rolled by the inclined rolling mill under the changed condition. (a) When the second wall thickness is smaller than the first wall thickness, the cross angle of each of the inclined rolls is made greater than the cross angle set for the first inclination rolling step.

Abstract: An electronic control apparatus includes target FR calculator that calculates a target exciting current duty ratio FR based on an exciting current inputted from FR terminal of a regulator and flowing through field coil, and information of engine operating conditions. The electronic control apparatus also includes target FR limit value FRCLP calculator that calculates a FRCLP corresponding to a drive torque limit value based on an output of a correlative information detector. A comparator compares target FR and FRCLP, outputs a control signal within FRCLP to a control unit, and controls a duty ratio FR of exciting current flowing through a field coil not to be larger than FRCLP.

Abstract: An electronic control apparatus includes target FR calculator that calculates a target exciting current duty ratio FR based on an exciting current inputted from FR terminal of a regulator and flowing through field coil, and information of engine operating conditions. The electronic control apparatus also includes target FR limit value FRCLP calculator that calculates a FRCLP corresponding to a drive torque limit value based on an output of a correlative information detector. A comparator compares target FR and FRCLP, outputs a control signal within FRCLP to a control unit, and controls a duty ratio FR of exciting current flowing through a field coil not to be larger than FRCLP.

Abstract: The invention provides a fuel injection control device in which the cost is low and the fuel injection quantity is flexibly adjusted corresponding to the operating conditions.

Abstract: The invention provides a fuel injection control device in which the cost is low and the fuel injection quantity is flexibly adjusted corresponding to the operating conditions.

Abstract: A controller for a four-stroke cycle internal-combustion engine, which has a single sensor mounted on a crankshaft and employs a single sequence of position signal pulses corresponding to crank angles, achieves reduced cost and higher accuracy even for an engine with an odd number of cylinders. For each revolution of the crankshaft, a position signal pulse is issued from the sensor mounted on the crankshaft; the position signal pulse includes a reference position signal pulse in a number which is a multiple of N of the number of cylinders and a cylinder identifying signal pulse for a particular cylinder every time the crankshaft rotates.

Abstract: A spinning lubricant composition for acrylic fiber, comprising:(a) at least one wax having a melting point of 30 to 130 degree, selected from the group consisting of ester wax, paraffin wax, polyethylene wax and polyethylene oxide wax, and(b) at least one surfactant, being cationic or amphoteric, selected from the group consisting of surfactants having the respective formulae (1) to (5): ##STR1##

Abstract: A high-speed spinning oil composition is disclosed, which comprises following components (A) and (B):(A) an organophosphoric ester salt of formula (1):M.sup.30 X.sup.- (1)wherein M.sup.+ is an alkali metal ion, ammonium ion or an amine ion; X.sup.- is an organophosphoric ester anion of formula (2): ##STR1## wherein R.sub.1 is an alkyl or alkenyl group of 8 to 22 carbon atoms; A is an alkylene group of 2 to 4 carbon atoms; a is a whole number of 0 to 22; and b is equal to 1 or 2; and(B) an oxyalkylene polymer of formula (3):R.sub.11 --O--(AO).sub.n H (3)wherein R.sub.11 is a hydrogen atom, an alkyl or alkenyl group of 1 to 20 carbon atoms, an acyl group of 2 to 22 carbon atoms, an aryl group, a polyhydric alcohol group or a silyl group; A is an alkylene group of 2 to 4 carbon atoms; the oxyalkylene polymer has a molecular weight of 2,000 to 40,000.

Abstract: A fuel control device of an engine which comprises: an intake pipe pressure detecting means; a crank angle signal generating means; a transient state determining means for determining a transient state of an engine; a transient state correction fuel quantity calculating means; an averaging means for averaging the pressure data in a predetermined crank angle signal period; a basic fuel quantity selecting and calculating means for calculating a basic fuel quantity after selecting an output signal of an instantaneous value of the pressure data or an output signal of the averaging means corresponding with an output level of the transient state correction fuel quantity calculating means; a fuel injection quantity determining means for calculating a fuel injection quantity by using the transient state correction fuel quantity and the basic fuel quantity; a fuel quantity measuring means for measuring a fuel quantity for supplying by injection fuel of the fuel injection quantity by the fuel injection quantity determi

Abstract: A metal cleaning composition is provided comprising: a nonionic active agent and/or an anionic active agent having an HLB value ranging from 3 to 18; and a carboxylic acid or salt thereof represented by the formula,R--X--(CH.sub.2).sub.m --COOMin which X represents N--H, N(CH.sub.2).sub.n --COOM or CH--COOM, R represents a saturated or unsaturated aliphatic hydrocarbon group having from 4 to 18 carbon atoms, phenyl group or tolyl group, and M represents a cation; and a five-membered ring compound having either one nitrogen atom and one sulfur atom, or three nitrogen atoms, and/or a quinoline derivative having a hydroxyl group.The composition according to the invention is advantageous in washing steel or copper plates without inducing pitting corrosion on the metal surface being contacted therewith.