Internal-combustion engines – Engine speed regulator – Having condition responsive means with engine being part of...
Patent
1989-05-26
1991-01-22
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Having condition responsive means with engine being part of...
123361, F02D 4114, G05D 1362
Patent
active
049862375
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to heat engines, and more specifically, it deals with a heat engine speed governor.
2. Description of the Related Art
Among most important characteristics of engineering standards of a machine unit incorporating a heat engine are reliability, capacity, fuel consumption, quality of performance, fuming and toxicity of exhaust gases under transient conditions, operative involvement of a driver and force applied to the accelerator pedal, adaptivity of a heat engine to different fuel grades, mountainous conditions, subzero temperatures and other characteristics. All the above-listed characteristics depend to a large degree on static and dynamic characteristics of a heat engine speed governor.
Mechanical speed governors with a flyweight (more rarely pneumatic or hydraulic) sensor member are mainly used in existing heat engines, in particular in tractor and automobile diesel engines. In addition to the ensurance of high performance of heat engine speed control, such governors should form the external and part-load speed control characteristics of fuel supply with such an accuracy that power capabilities of a heat engine could be used to the maximum extent on the one hand and specific fuel consumption, temperature, fuming and toxicity of exhaust gases and other parameters of the heat engine should not reach critical values resulting in the impairment of the engineering standards of machine units on the other hand.
For forming external and part speed control characteristics of fuel supply, various kinds of correcting devices and mechanisms are installed in mechanical speed governors. To enhance automation of heat engine control and control of a machine unit as a whole, such speed governors are provided with special electrical actuators including a reversible electric motor for adjusting speed mode of a heat engine, electromagnets for limiting and interrupting fuel supply, an electromagnetic device for enriched fuel supply during starting of a heat engine, an electrohydraulic valve for shutting-off fuel supply in a fuel supply system for an emergency stop of a heat engine.
Also known in the art are electrical heat engine speed governors featuring a wide range of capabilities in enhancing automation of a heat engine control owing to the use of an integrated electrically actuated device for controlling position of a fuel metering member of a heat engine.
The type of program of operation of a speed governor, static, dynamic and functional properties incorporated therein depend on use of a machine unit, operating conditions, nature of load, kind of operations performed by the machine unit and on a number of other factors associated with different operations to be performed by the machine unit.
Known in the art is a large class of electrical heat engine speed governors built around a positioning electric actuator with an alternating direction of armature rotation, comprising an electric actuator proper which is operatively connected to a fuel metering member of a heat engine and electrically connected to a unit for comparing current value of the heat engine speed with the desired speed, a device for forming a program of a heat engine speed control, and a unit for forming an electric actuator control signal.
The electric actuator in such speed governors may be in the form of an electric torque motor or in the form of a proportional electromagnet (cf. Proc. of Symp. "R. Bosch", FRG. Ed. Moscow, May 16, 1984. K. Tsimmerman. Standards of Technology of "Bosch" Diesel Equipment (FIGS. 17 and 22), or in the form of a step motor (cf. Proc. Symp. "Friedman-Mayer" Austria. Ed. Leningrad, Apr. 16, 1984. F. Pashke. Development of Electronic Speed Governor. pp. 4, 5, FIG. 17). The above group of electric positioning actuators with alternating direction of armature movement during control will be hereinafter referred to as electric motors.
Process of speed control in a heat engine with the above-mentioned electrical speed governors occurs in the following man
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Standards of Technology of "Bosch" Diesel Equipment, Mar. 16, 1984.
Friedman-Mayer Austria, Development of Electronic Speed Governor (no date).
Khaimin Jury F.
Kozlov Anatoly V.
Marakin Vladimir I.
Vainshtein Grigory Y.
Argenbright Tony M.
Mates Robert E.
Nauchno-Proizvodstvennoe Objedinenie Po, etc.
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