Abstract: In a method of simulating flow behavior of a resin in a process for press-molding the resin by use of a press-molding machine comprising a press apparatus equipped with a hydraulic circuit, and first and second molds at least one of which is connected to the press apparatus, disclosed is a method comprising a step of determining, from a characteristic of the hydraulic circuit, an elastic coefficient of the press apparatus, and an apparent elastic coefficient of the resin, a true compression rate imparted to the resin by the press apparatus, and a step of sequentially analyzing, based on the true compression rate, flow behavior of the resin.

Abstract: A drive system (1) for a motor vehicle is disclosed. The drive system (1) includes left and right wheels (2,3) driven by left and right hydrostatic drive units (5,6), respectively. A rear wheel (4) is used to steer the motor vehicle. A linkage system including links (9,10,12) is used to connect or disconnect the drive units (5,6) to or from their respective wheels (2,3) when the steered rear wheel (4) calls for a direction of turning.