SYSTEM FOR INJECTING LIQUID VAPOUR

摘要

System (1) for injecting a vapour wich is liquid under pressure, such as L. P. G. The system comprises a storage tank (2), pump (3), supply line (5), one or more injectors (6) and a return line (11) extending from the injectors to the tank. In order, as far as possible, to prevent the fuel from heating up, the amount of liquid vapour through the return line (11) as to be limited to the greatest possible extent. On the other hand, the pressure of the injectors (6) has to be within the prescribed range. According to the invention, this is achieved by no longer using a pressure regulator for the injector which is located furthest downstream and by controlling the delivery of the fuel punmp on the basis of the intended amount of fuel to be injected. If desired, a restriction (12) may be provided in the return line (11) but during operation supply and discharge are in open communication with one another. The respective restriction (12) can be designed in such a manner that it provides a constant flow of fuel.