Abstract: A volumetric fuel meter is included in a fuel system whereby the measurement is compensated to express fuel flow in units of weight such as pounds, grams or in units of energy such as BTU's or calories (grams). The meter measurement is associated with an automatic compensator which compensates the measurement for variations in the gravity of the fuel. Temperature and pressure sensing devices are associated with the measuring systems. Two separate measuring systems are employed for engine fuel systems which return unburned fuel from the injector. One system employs a single volumetric meter with a bubble remover or cooler while the second system employs two volumetric meters. The present measuring system has embodiments that provide for mechanical compensation and electrical measurement and subsequent compensation of the gravity of the fuel.

Abstract: The invention includes temperature controlled fuel systems which may or may not have measuring devices therein. Systems of the invention may be used with engines which return unburned fuel, and treatment apparatus may be included in such systems for cooling the fuel, removing bubbles or the like. In one system having the treating apparatus, a fuel line conducts fuel from the fuel supply to the engine in bypassing relation to the treatment apparatus. One concept uses a single measuring device and another concept includes two measuring devices which give a differential output of fuel measurement. Indicating or recording devices or both are responsive to single or dual measuring devices to indicate fuel flow. Also, in the fuel system which is used with engines that return unburned fuel and which uses a single measuring device, such measuring device is connected prior to the combining of the return fuel and the fuel supply for the engine.

Abstract: A fuel measuring and recording system arranged for use with a fuel system for combustion devices of the type which recirculate unburned fuel back to the fuel system. The present system includes a measuring device which measures fuel flow. Recording apparatus is responsive to the measuring device to make a record of fuel flow. Compensating structure can be used in the measuring system to compensate the measurement for variations in the physical characteristics or temperature of the fuel. Structure for treatment of the fuel may be employed with the fuel measuring system. Another concept of the invention conducts fuel from the measuring device to the combustion device in bypassing relation to the structure for treating the fuel. Also comprising a part of the present invention is a method for monitoring fuel flow whereby a measured amount is determined prior to and bypassing a treatment zone which receives excess fuel and whereby the measured amount is recorded.

Abstract: A compensated measuring system arranged for use with a fuel system for engines. The system has a volumetric measuring device measuring fuel flow in the system. Compensating structure is arranged to compensate the measurement of the measuring means for variations in the physical characteristics or temperature of the fuel. Indicating or recording devices are arranged to indicate or record the compensated measurement of fuel flow. The following concepts of the invention recite a compensating measuring structure for engines of the type which return unburned fuel. One concept includes two measuring devices, the differential of which provides accurate measurement of fuel flow for engines. Another concept includes structure for treatment of the fuel for cooling, removing bubbles, or the like. Another concept of the invention conducts fuel from the measuring device, which may or may not be volumetric, to the engine in bypassing relation to the structure for treating the fuel.

Abstract: A volumetric measuring device arranged for use with a fuel system for engines of the type which return unburned fuel. The measuring device has a movable measuring member. An electric sensor in an electric circuit senses movement of the movable member. Indicating or recording devices, or both, are responsive to the electric sensor to indicate and record fuel flow through the measuring device. One system of the invention utilizes two measuring devices to provide a differential in output of the electric sensors for accurate measurement. Structure for treatment of the fuel may be employed with the system for cooling, removing bubbles, or the like. An alternative structure for sensing movements of the movable member comprises a magnetic pickup. Another concept of the invention conducts fuel from the measuring device, which may or may not be volumetric, to the engine in bypassing relation to the structure for treating the fuel.

Abstract: A meter housing including internal metering apparatus movable by fuel flowing through the housing. The metering apparatus in its driven function operates in a rotating, reciprocating or wobbling manner, and with its operation moves a permanent type magnet. The magnet is associated with a sensing device in an electrical circuit which senses the moving functions of the magnet and transmits operating cycles to a pulse receiver in the electrical circuit which in turn operates selected types of counters or read-out devices such as digital tachometers, totalizing counters, re-set counters, or the like. Importantly, the magnet is a part of the metering apparatus operating in the fluid compartment of the housing and the sensing device is disposed in another compartment in the housing close enough for influence by the magnet but completely isolated from the fuel by a fluid impervious wall, thus preventing any possibility of explosion.

Abstract: Measuring systems arranged to measure fuel flow for fuel combustion devices of the type which recirculate unburned fuel back to the system. A measuring device has a movable member which actuates a magnetic pickup in an electric circuit. Indicating or recording devices, or both, are responsive to the magnetic pickup to indicate and record fuel flow through the measuring device. Structure for treatment of the unburned fuel may be employed. The invention includes methods for measuring fuel flow in a system where excess fuel not used in a zone of use is routed back to the zone of use.

Abstract: A meter capable of accurately measuring volume or weight of fuel consumed by an engine per unit time. The meter includes a piston driven in reciprocating movement by fluid being pumped therethrough by the engine fuel pump. The reciprocating motion is converted to rotative motion by a barrel cam the output of which drives a tachometer-like instrument calibrated to show volume or weight of fuel used per unit of time. A lever operated bypass valve is associated with the meter to bypass the latter if desired. The meter is adjustable to compensate for expansion or contraction of the fluid or for different types of fuel. It is also within the concept of the invention to combine the rate meter hereof with other recording mechanism for making a permanent record of fuel usage. Furthermore, the meter may be combined with other treating means such as temperature control means and bubble removing means.