ELECTRONIC SPEED REGULATOR FOR INTERNAL COMBUSTION ENGINES

• US 3,777,174 A
• Filed: 02/23/1972
• Issued: 12/04/1973
• Est. Priority Date: 03/02/1971
• Status: Expired due to Term

• Current Assignee: Franz Butscher, Werner Bader
• Original Assignee: Franz Butscher, Werner Bader
• Inventors: Butscher, Franz, Bader, Werner
• Primary Examiner(s): Simmons, G. R.
• Application Number:
  US05/228,685
• Time in Patent Office: 650 Days
• Field of Search: 123/32EA,102 290/40,51
• US Class Current: 290/40.00R
• CPC Class Codes: F02D 2200/0406 Intake manifold pressure
• CPC Class Codes: F02D 41/407 of the in-line type
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An electronic rotational speed control device for internal combustion engines of large power output with a desired-value adjustment for the rotational speed and filling of the internal combustion engine, a desired-actual-value comparison of the rotational speed, a control stage, an amplifier, and adjusting member with a servo-valve for the filling control which is provided with a motion pickup and a feedback; a pure rotational speed control stage with P-I-D behavior or a filling-rotational speed control stage can be selectively engaged while between the control stage and amplifier a filling-limit signal intended to limit the engine filling is compared with the filling-signal produced by the control stage whereby the respective smaller signal is transmitted to the amplifier; two measuring systems are provided for the rotational speed measurements which are utilized selectively for the supply of the rotational-speed existing-value and which can be connected by way of an OR-circuit so as to act, in case of excess rotational speed, on a stoppage mechanism of the internal combustion engine.

Claims

1. An electronic control device for internal combustion engines with high-power output, characterized by a first desired value means for setting a desired rotational speed for the internal combustion engine, a second desired value means for setting a desired fuel quantity filling value for the internal combustion engine, means for comparing the desired-value and actual-value of the rotational speed, first pure rotational-speed control means with P-I-D behavior responsive to the output of said rotational speed comparing means, second fuel quantity filling-rotational speed control means responsive to the output of said second desired-value means, means for selectively engaging as a control stage one of said first and second control means, means for providing a fuel quantity filling limit signal, second means for comparing the output signal of the selected first and second control means with the fuel quantity filling signal, and providing an output of the respective smaller signal, and adjusting means responsive to the second comparing means for controlling the fuel quantity filling of the internal combustion engine in accordance with the smaller signal.

2. An electronic control device according to claim 1, characterized in that amplifier means are provided between said second comparing means and said adjusting means, said adjusting means including a servo-valve for controlling the fuel quantity filling of the internal combustion engine, motion pick-up means providing an output signal indicative of the actual fuel quantity filling value, and feed-back means for feeding back to actual filling value.

3. An electronic control device according to claim 2, characterized in that two measuring means are provided for the rotational speed measurement which can be utilized selectively for the supply of the actual-value of the rotational speed, and means selectively connecting the two measuring means by way of an OR-circuit with a stopping means of the internal combustion engine to render the stopping means effective in case of excess rotational speed.

4. An electronic rotational speed control device according to claim 3, with a control stage having a P-I behavior, characterized by means for obtaining the P-behavior with adjustable proportionality range by changing the rotational speed desired value in dependence on the actual-value of the filling signal.

5. An electronic rotational speed control device according to claim 2, with limit control means at maximum possible output at the desired rotational speed, characterized by means forming from the sum of the filling-limit signal and filling-actual-value signal a new signal for adding to the rotational speed-desired value signal and including a further substantially constant signal corresponding to a maximum filling-signal.

6. An electronic rotationAl speed control device according to claim 5, characterized by parallel operation of several internal combustion engines, and a single common guide control means with a control stage are operatively connected with said several internal combustion engines to provide a filling signal therefor.

7. An electronic rotational speed control device according to claim 6, in which the internal combustion engines are operatively connected with generators which operate on a common network, and characterized in that a signal taking into consideration the effective load of a respective generator driven by the corresponding internal combustion engine is added to the filling signal of the common guide control means for the individual internal combustion engine so that all engine-generator installations are operated with the prescribed load.

8. An electronic rotational speed control device according to claim 7, characterized in that the amplifier means includes operational amplifiers with diodes included in the feedback means so that the temperature influence of the diodes is eliminated.

9. An electronic rotational speed control device according to claim 8, characterized in that the filling limit signal is operable to limit the engine filling and said filling limit means provide the filling limit signal in dependence of at least one of the parameters consisting of engine rotational speed, outside air pressure, oil temperature and charging air temperature.

10. An electronic rotational speed control device according to claim 9, characterized in that the filling limit signal is operable to limit the engine filling as a function of all of said parameters.

11. An electronic rotational speed control device according to claim 2, with a control stage having a P-I behavior, characterized by means for obtaining the P-behavior with adjustable proportionality range by changing the rotational speed desired value in dependence on the actual-value of the filling signal.

12. An electronic rotational speed control device according to claim 2, with limit control means at maximum possible output at the desired rotational speed, characterized by means forming from the sum of the filling-limit signal and filling-actual-value signal a new signal for adding to the rotational speed desired-value signal and including a further substantially constant signal corresponding to a maximum filling-signal.

13. An electronic rotational speed control device according to claim 2, characterized by parallel operation of several internal combustion engines, and a single common guide control means with a control stage are operatively connected with said several internal combustion engines to provide a filling signal therefor.

14. An electronic rotational speed control device according to claim 13, in which the internal combustion engines are operatively connected with generators which operate on a common network, characterized in that a signal taking into consideration the effective load of a respective generator driven by the corresponding internal combustion engine is added to the filling signal of the common guide control means for the individual internal combustion engine so that all engine-generator installations are operated with the prescribed load.

15. An electronic rotational speed control device according to claim 2, characterized in that the filling limit signal is operable to limit the engine filling and said filling limit means provide the filling limit signal in dependence of at least one of the parameters consisting of engine rotational speed, outside air pressure, oil temperature and charging air temperature.

16. An electronic rotational speed control device according to claim 15, characterized in that the filling limit signal is operable to limit the engine filling as a function of all said parameters.

17. An electronic rotational speed control device according to claim 2, characterized in that the amplifier means includes operational amplifiers with diodes included in the feedbAck means so that the temperature influence of the diodes is eliminated.