초록 ▼

An air/fuel control system (including apparatus and method for a Stirling engine is disclosed. A signal generated by deviation of the temperature of the heater head gas temperature from a set-point is used to control an air flow throttle valve. Variations in the air flow of the external combustion c

An air/fuel control system (including apparatus and method for a Stirling engine is disclosed. A signal generated by deviation of the temperature of the heater head gas temperature from a set-point is used to control an air flow throttle valve. Variations in the air flow of the external combustion circuit is sensed by way of a vortex-shedding device which delivers a D.C. electrical signal. The signal is shaped and amplified and used to control operation of one or more fuel injectors which feed into a common outlet manifold leading to the fuel nozzle serving the external combustion circuit. The fuel injectors are solenoid operated, one sized to provide a fuel flow rate of 0.4-2.0 g/sec., and at least two others are sized to provide a combined fuel flow rate of 2-15 g/sec., but 180°out of phase with each other. The series of injectors provide an effective fuel control range of 0.4-15 grams/sec. to achieve an air/fuel ratio range of 37.5 to 1.

대표청구항 ▼

In an apparatus for maintaining the temperature of a heater head of a hot gas engine at a substantially constant temperature, the engine having a combustion chamber and the apparatus having a temperature responsive element giving a signal in accordance with the temperature of the heater head, said a

In an apparatus for maintaining the temperature of a heater head of a hot gas engine at a substantially constant temperature, the engine having a combustion chamber and the apparatus having a temperature responsive element giving a signal in accordance with the temperature of the heater head, said apparatus further having a servo-system governed by said signal and a regulating means including a combustion air blower driven by the engine governing the rate of delivery of combustion air from the blower operable by said servo-system, the improvement comprising: (a) means responsive to the rate of flow of combustion air from the blower including a plurality of differentially sized fuel injectors effective to continuously introduce fuel through one or more of said injectors to the air delivered by said blower for combustion, said injectors being effective to meter fuel over a range of 0.4-15 grams per second; and (b) a pressure regulator to regulate the pressure of said fuel delivered to said plurality of fuel injectors, whereby a constant uniform pressure drop is experienced across all said fuel injectors.