Internal-combustion engines – Engine speed regulator – Having condition responsive means with engine being part of...
Patent
1988-09-26
1990-06-26
Dolinar, Andrew M.
Internal-combustion engines
Engine speed regulator
Having condition responsive means with engine being part of...
123352, F02D 3100
Patent
active
049362747
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to heat engines and, more particularly, the invention relates to a heat engine speed governor.
DESCRIPTION OF THE PRIOR ART
The most important technical characteristics of a machine with a heat engine are reliability, output capacity, low fuel consumption, quality of performing the technological operations by the machine, content of smoke in the exhaust and toxicity of the flue gases under transient operating conditions, amount of operations performed by the driver and a force applied to the accelerator pedal of the vehicle, fitness of the heat engine to different kinds of fuel, high mountain conditions, low ambient temperatures and other parameters. The above characteristics largely depend on the properties of the speed governor of the heat engine.
The present-day heat engines, in particular tractor and automotive engines, are equipped mainly with mechanical governors having a centrifugal-type sensing element. In order to improve the automatic control of the vehicle, these governors are equipped with special-purpose electric drives including a reversible electric motor for controlling the speed of the heat engine, an electric motor for limiting the fuel supply, an electric magnet device for increasing the fuel supply when starting the heat engine, and an electrohydraulic valve to cut off the fuel supply when stopping the heat engine.
The prior art mechanical, hydraulic and pneumatic governors do not meet the permanently increasing requirements to the level of automation of controlling the fuel supply of a heat engine. Furthermore, the modern governors must maintain a preset speed of the heat engine with a high accuracy under steady-state conditions (with permissible tolerance within .+-.0.25% of the rated value), which cannot be maintained by means of the above governors. Therefore, studies are being conducted to develop an electrical governor capable of improving the automatic control of a heat engine and providing a high accuracy of maintaining a preset speed of the heat engine due to flexible adjustment of the control elements of the governor and application of corrective feedback. The static, dynamic and functional characteristics of the automatic speed control system of a heat engine are set by forming a program of control of an actuating electric drive. The type of this program depends on the application of the machine unit with a heat engine, nature of the machine load and some other technological factors.
Known in the art is a large group of electrical governors for controlling the speed of a heat engine based on a positioning electric drive having alternating direction of rotation of the armature comprising an electric drive kinematically connected to a fuel dosing device and electrically connected to a unit comparing the real speed of the heat engine with a preset speed, a unit for forming the program for controlling the heat engine, and a unit for forming a program for controlling the electric drive. The electric drive in these governors may be made in the form of a moment electric motor or a proportional electric magnet (materials of the symposium of "Robert Bosch" Company BRD, published on May 16,1984 (Moscow): report by K. Zimmerman "Diesel Equipment of the "Bosch" Company" (FIGS. 17 and 22), or in the form of a step motor (materials of the "Fridman-Mayer" symposium, Austria, published on Apr. 16, 1984 (Lenigrad): report by F. Pashke "Development of Electronic Governor", pp. 4-5, FIG. 17).
Later on the entire group of positioning electric drives providing alternating rotation of the armature in the process of control will conventionally be called electric motors.
The process of controlling the speed of a heat engine having electric governors of this group is effected as follows. Under steady state conditions, when the heat engine speed is equal to a required speed, no control signal is present at the output of the unit comparing these speeds. As a result, the electric motor armature and the fuel dosing device are in an equilibrium state corre
REFERENCES:
patent: 4304202 (1981-12-01), Schofield
patent: 4461254 (1984-07-01), Pfalzgraf
"Fridman-Mayer", Symposium, Austira pub. 01/16/84 (Leningrad): Report by F. Pashke, Development of Electronic Governor, P4-5, FIG. 17.
Symposium of "Robert Bosch", Company BRD, pub. 05/16/84 (Moscow): Report by K. Zimmerman, Diesel Equipment of the Bosch Company (FIGS. 17 & 22).
Khaimin Jury F.
Kozlov Anatoly V.
Marakin Vladimir I.
Vainshtein Grigory Y.
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