Control apparatus for vehicular charging generator

• US 4,651,081 A
• Filed: 02/06/1986
• Issued: 03/17/1987
• Est. Priority Date: 02/25/1985
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Wada, Hifumi, Nishimura, Shinji, Komurasaki, Keiichi
• Primary Examiner(s): Salce, Patrick R.
• Assistant Examiner(s): Simpson, Mark D.
• Application Number:
  US06/826,875
• Time in Patent Office: 404 Days
• Field of Search: 322/29, 322/14, 322/15, 322/28, 322/38, 322/59, 123/339, 320/64, 320/30, 320/31, 320/32, 320/39, 320/40
• US Class Current: 320/123
• CPC Class Codes: H02J 7/1446 in response to parameters of a vehicle
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

A control apparatus for a vehicular charging generator utilizing various sensors which detect an unstable rotation during the starting of an engine, the acceleration/deceleration condition of the engine, an overload condition of the engine etc. to regulate the output voltage of the generator by a micro-computer, whereby the rotation of the engine is stabilized and the acceleration performance is enhanced due to a reduction of the load of the generator while and over-discharge of the battery is effectively compensated. Also, various abnormal conditions are detected by the sensors and indicated.

Claims

1. A control apparatus for a vehicular charging generator driven by an engine and for supplying electrical power to a battery and electrical loads comprising:

a driving portion for controlling the field current of said genrator to regulate the output voltage of said generator;

at least one sensing means for sensing a predetermined operating condition of said engine and for generating an output representative thereof; and

control means for controlling said driving portion by determining said operating condition of said engine according to the output of said sensing means, said control means causing said generator to stop the power generation when the output of said sensing means indicates the predetermined operating condition including at least one of an underspeed rotation condition, an acceleration condition, and an overload condition of said engine, and for temporarily increasing the regulated ouput voltage of said generator as compared with a normally regulated voltage thereof for a predetermined period after said sensing means have not sensed the predetermined condition to compensate for battery overdischarge.

2. A control apparatus for a vehicular charging generator driven by an engine and for supplying electrical power to a battery and electrical loads comprising:

a driving portion for controlling the field current of said generator to regulate the output voltage of said generator;

sensing means for sensing the rotational speed of said engine; and

,

control means for stopping the power generation of said generator by determining that said rotational speed is lower than a predetermined speed according to the output of said sensing means;

said control means measuring a time interval for which said generator stops generating and controlling said driving portion so that the output voltage of said generator is made higher than a normally regulated voltage thereof for a time interval having as a parameter said measured time interval when said rotational speed becomes higher than said predetermined speed.

3. A control apparatus for a vehicular charging generator as claimed in claim 2 wherein said control means re-starts the power generation of said generator at said normally regulated voltage if said measured time interval is longer than a predetermined time interval, and controls said driving portion so that said genrator again stops generating if said rotational speed of said engine is still lower than said predetermined speed.

4. A control apparatus for a vehicular charging generator driven by an engine and for supplying electrical power to a battery and electrical loads comprising:

a driving portion for controlling the field current of said generator to regulate the output voltage of said generator;

sensing means for sensing the acceleration condition of said engine; and

,

control means for controlling said driving portion so that said field current is suppressed to restrict the regulated output voltage of said generator when said sensing means senses said acceleration condition;

said control means measuring a time interval for which the output voltage of said generator is restricted and controlling said driving portion so that the regulated output voltage of said generator is made higher than a normally regulated voltage thereof for a time interval having as a parameter said measured time interval after said sensing means has not sensed said acceleration condition.

5. A control apparatus for a vehicular charging generator as claimed in claim 4 wherein said control means controls said driving portion so that said suppression of said field current is stopped in a predetermined time interval while said sensing means senses said acceleration condition.

6. A control apparatus for a vehicular charging generator driven by an engine and for supplying electrical power to a battery and electrical loads comprising:

a driving portion for controlling the field current of said generator to regulate the output voltage of said generator;

first sensing means for sensing the rotational speed of said engine;

second sensing means for sensing the deceleration condition of said engine; and

,

control means for controlling said driving portion so that the regulated output voltage of said generator is made higher than a normally regulated voltage thereof when said rotational speed is higher than a predetermined speed and also said engine is in said deceleration condition.

7. A control apparatus for a vehicular charging generator as claimed in claim 6 wherein said second sensing means senses the throttle opening of said engine whereby said second sensing means senses said deceleration condition when said throttle opening is below a predetermined degree.

8. A control apparatus for a vehicular charging generator driven by an engine and for supplying electrical power to a battery and electrical loads comprising:

a driving portion for controlling the field current of said generator to regulate the output voltage of said generator;

sensing means for sensing the terminal voltage across said battery; and

,

control means for measuring a time interval for which said terminal voltage is lower than a predetermined voltage and for controlling said driving portion so that the output voltage of said generator is made higher than a normally regulated voltage thereof for a time interval having as a parameter said measured time interval when said terminal voltage has returned to said predetermined voltage or more.

9. A control apparatus for a vehicular charging generator driven by an engine and for supplying electrical power to a battery and electrical loads comprising:

a driving portion for controlling the field current of said generator to regulate the output voltage of said generator;

a throttle opening sensor means for sensing the throttle opening of said engine and for generating an output representative thereof;

an engine speed sensor means for sensing the rotational speed of said engine and for generating an output representative thereof;

a battery voltage sensor means for sensing the voltage across said battery and for generating an output representative thereof;

a trio-voltage sensor means for sensing the trio-voltage of said charging generator and for generating an output representative thereof; and

control means for controlling said driving portion to stop the power generation of said generator responsive to at least one of an acceleration condition, a deceleration condition, an idling condition of said engine, and a charging condition of said battery based on the outputs of said sensor means, and for temporarily increasing the regulated output voltage of said generator as compared with a normally regulated voltage thereof for a predetermined period after said sensing means have not sensed at least one of the conditions to compensate for battery overdischarge.

10. A control apparatus for a vehicular charging generator as claimed in claim 9 further including an alarm means for detecting and indicating an abnormal condition of said engine from the outputs of said sensors.