| 摘要 |
<p>1,242,876. Two-stroke engines; driving-gear. AUTOMOBILES CITROEN S. A. Nov.19, 1968 [Nov.22, 1967], No.54914/68. Heading F1B. [Also in Division F2] A two-stroke engine a is connected to one element (planet carrier b) of a three-element epicyclic gear, a scavenging blower d is connected to another element (sun-wheel c), and the load (e.g. vehicle wheels) is connected to the third element (annulus wheel e) through a variable-speed power transmission T; and at least one variable-speed power transmission C is coupled between the blower shaft d and either the output shaft of the engine or, as shown, the input shaft f of the transmission T. Where two transmissions C are provided, one is coupled to the engine output shaft and the other to the shaft #. As shown, the transmission C is a torque converter but may instead be a variableratio belt drive or an electrical transmission. The epicyclic gear divides the output power of the engine between the vehicle wheels and the blower d. The torque converter C modifies this arrangement by automatically transferring power from the blower d to the shaft #, or vice-versa, the effect being to keep the blower speed substantially constant. Thus, if the blower is dimensioned for the average engine speed, power is transferred from the blower to the shaft f at high engine speeds and from the shaft f to the blower at lower engine speeds. If the blower is dimensioned for low engine speed or for high engine speed, the transference of power takes place exclusively in one direction, and the torque converter C may be designed solely for operation in that direction.</p> |
