| 摘要 |
<p>1513753 Valves ROBERT BOSCH GmbH 13 May 1975 [27 Aug 1974] 19999/75 Heading F2V [Also in Division F1]. A valve 6 in a fuel-injection system comprises a diaphragm 5 carrying a closure plate 13 to co-operate with a seat 8, the periphery of the plate engaging a knife-edge ring 44 when the valve is closed. The valve receives fuel from a spool valve 37 which is supplied by a pump 23 and adjusted in response to changes in engine manifold pressure. The pressures upstream and downstream of the spool valve are applied to opposite sides of the diaphragm 5 to control the movement of the closure plate with respect to its seat, the plate having a pivotal movement about a single point of contact with the ring. The spool may be biassed by a spring 35 or by hydraulic pressure and supplies a number of pressure-equalising valves 7 in which the space below the diaphragm is connected by a passage (18) Fig. 2 (not shown) to the space above the diaphragm 5.</p> |
