| 摘要 |
<p>924,015. Adjusting vehicles' weight. FABBRICA ITALIANA MAGNETI MARELLI S.p.A. July 14, 1960 [Aug. 3, 1959], No. 24541/60. Class 108(2). A vehicle has at least two main axles 1, 2, an auxiliary axle 3 suspended on a pneumatic spring 6 and an air control valve 9, responsive to the loading on the vehicle, which supplies air to spring 6 as the vehicle is loaded. As the vehicle is loaded a cam 20 is rotated through linkage 16, 17 and pushes piston 10<SP>1</SP> to the right and hence the phase valve 13 through spring 11, piston 10 and hollow piston rod 12 to allow compressed air to enter chamber 8 and bellows 6 through pipe 15 from air reservoir 14. When the air pressure on the right hand side of piston 10 and the force of spring 23 acting through push rod 12 exceeds the force of spring 11 valve 13 closes. As vehicle load is further reduced the force in spring 11 is reduced until it is exceeded by the air pressure on the righthand side of piston 10 when piston 10 and push rod 12 move to the left and air escapes from bellows 6 through the hollow push rod 12 and opening 26 in valve 9 to atmosphere until once again the force of spring 11 exceeds the air pressure on piston 10 and push rod 12 seats against valve 13.</p> |
