Abstract: To provide a multi-cylinder engine in which cam shaft linked with a plurality of intake valves and a plurality of exhaust valves for carrying out intake and exhaust operations for a plurality of combustion chambers is rotatably supported by cam bearing portions provided on the cylinder head and a cam holder fastened to the cam bearing portions. An oil passage capable of supplying oil from an oiling passage provided in the cylinder head is formed in the cam shaft. Oil can be supplied in the oil passage in the cam shaft without restriction in the location of fastening bolts for fastening the cylinder head to the cylinder block. An oiling hole is provided in the cam shaft in such a manner as to be in communication with the oil passage, and an oil groove in communication with the outer end of the oiling hole is formed in a cam bearing portion, provided in the cylinder head, at a position corresponding to one of combustion chambers, in such a manner as to face toward the outer surface of the cam shaft.

Abstract: A horizontally-opposed type engine for a motorcycle, in which a pair of left and right cylinder heads are connected to a pair of left and right cylinder blocks in such a manner that combustion chambers are formed between each of the cylinder blocks containing a plurality of cylinder bores disposed in parallel with the axial lines thereof extending substantially in the horizontal direction and pistons slidably fitted in the cylinder bores; a crank shaft is disposed in such a manner as to be perpendicular to the axial lines of the cylinder bores; and the engine is mounted on the motorcycle with the axial line of the crank shaft extending in the longitudinal direction, wherein the restriction to the bank angle of the motorcycle given by the exhaust pipes is made small and thereby the bank angle is easily ensured.

Abstract: The invention provides a method of producing alkylene glycol monosorbates which comprises reacting sorbic acid and an alkylene oxide having 2 to 4 carbon atoms in a certain system containing a solvent inactive to the alkylene glycol monosorbates, one or more iron catalysts and one or more compounds consisting of phenothiazines and alkylphenols, washing the obtained synthesized liquid with an aqueous (bi)carbonate solution, and then purifying the washed liquid by distillation, and a method of reserving the alkylene glycol monosorbates.

Abstract: A method for producing crystals of sorbic acid by recrystallization with an aqueous solution of an alcohol and wherein an alkali metal ion is employed as a crystal-modifying ion.According to this method, a recrystallized product of sorbic acid having a superior hardness, bulk density, fluidity, etc. is obtained.