An apparatus for dispensing a metered quantity of fluid, in which the fluid is stored under pressure in a container that is normally open to a metering chamber, but which, when the apparatus is actuated, has valve means closing the connection between the storage container and the measuring chamber, and the measurin chamber is then connected to a discharge outlet for the positive ejection of the fluid.
In a system for dispensing a metered quantity of starting fluid in an internal combustion engine, means for pressurizing the starting fluid reservoir from an external source of compressed air, including a valving system to accomplish this and a special check valve particularly adapted for use in the system.
An injector apparatus for injecting starting fluid into the cylinders of an internal combustion engine can be operated by an on-board compressed air system of a vehicle. A reserve air tank provides air to operate a fuel delivery mechanism so that the injector can function in the absence of air pressure in the system. Preferably, the vehicle has two air systems, a first for the starter and a second, which may be connected to the brakes, that supplies air to operate the injector. A control valve of the injector is responsive to pressure in the first system for synchronization purposes.
A fuel additive delivery system used with the fuel system of an engine. When fuel is added to a holding tank fluid pressure is reduced at a Venturi guide. The Venturi guide is connected to an additive delivery system. When the static fluid pressure in the Venturi guide falls below a level a sucking action is initiated. This action opens a normally closed valve in a meter system connected to an additive tank. When the valve opens additive flows from the additive tank into and past the Venturi guide into a fuel holding tank for the engine.
An injector apparatus particularly suited for injecting starting fluid into the cylinders of an internal combustion engine can be operated by the on-board compressed air system of a vehicle. The air, which may be taken from an air-driven starter motor or an air brake system, is used to actuate a piston causing starting fluid to be expelled from a metering chamber into the fuel cylinders of the vehicle's engine. The metering chamber is then refilled from a pressurized reservoir.
An engine system includes a starting aid which is mounted in the air inlet manifold of the engine and is supplied with fuel from a fuel chamber to assist starting of the engine. The engine includes a fuel injection nozzle which is supplied with fuel at high pressure by means of a pump. The leakage fuel from the nozzle is utilized to recharge the chamber with fuel during running of the engine and the chamber is provided with an overflow connection back to a source of fuel.
