EP0339576A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Charging control apparatus for vehicle
Assignee: Offta Pubco Licza Uso Non Esclusivo Offerta Lic
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Filing: 1989-04-25
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Granted: —
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Expires: 2009-04-25
Abstract
Abstract In a charging control apparatus for a vehicle for controlling generation of electric power from a vehicle's generator charging a battery, the rate of increase in field current supplied to the generator is increased when an electrical load is connected to the generator. A switch is connected in series with the field winding, and a conduction rate detector detects the conduction rate of the switch and generates an output signal having a value which is a function of the conduction rate of the switch. A maximum signal generator generates an output signal having a value larger by a predetermined value than that of the output signal of the conduction rate detector, and a comparator is enabled to operate while the maximum signal generator is generating the maximum signal. The comparator is preferably enabled again when the value of the output signal of the conduction rate detector exceeds a setting. The predetermined value is preferably increased with the increase in the conduction rate of the switch. By enabling the comparator depending on the value of the maximum signal, the conduction rate of the switch can be gradually increased after it is increased by a predetermined value. The comparator is enabled when the value of the output signal of the conduction rate detector attains its setting, and the battery can be quickly charged when the conduction rate exceeds the setting. Because the predetermined value is increased with the increase in the conduction rate, the battery can be quickly charged according to the conduction rate while decreasing the burden on the engine.
Inventors
- 👤 Hidetoshi Kato
- 👤 Hiroshi Shibata
- 👤 Tooru Aoyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:50
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/24; H02J7/2434; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
176 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to generate an output voltage for charging a battery; switching means connected in series with said field winding; conduction rate detecting means for detecting the conduction rate of said switching means to generate an output signal having a value which is a function of the conduction rate of said switching means; maximum signal generating means for generating a maximum signal having a value larger by a predetermined value than that of the output signal of said conduction rate detecting means; comparing means receiving the output voltage of said vehicle's a.c. generator as an input for comparing said output voltage with a predetermined reference voltage applied as the other input, thereby controlling said switching means on the basis of the result of comparison; and enable control means for enabling said comparing means to generate its output signal depending on the value of the maximum signal generated from said maximum signal generating means.
Claim 2
Dependent Claim
176 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to generate an output voltage for charging a battery; switching means connected in series with said field winding; conduction rate detecting means for detecting the conduction rate of said switching means to generate an output signal having a value which is a function of the conduction rate of said switching means; maximum signal generating means for generating a maximum signal having a value larger by a predetermined value than that of the output signal of said conduction rate detecting means; comparing means receiving the output voltage of said vehicle's a.c. generator as an input for comparing said output voltage with a predetermined reference voltage applied as the other input, thereby controlling said switching means on the basis of the result of comparison; and enable control means for enabling said comparing means to generate its output signal depending on the value of the maximum signal generated from said maximum signal generating means.
Claim 3
Dependent Claim
47 words
A charging control apparatus according to Claim 1, wherein said maximum signal generating means includes a comparator receiving the output signal of said conduction rate detecting means as one of inputs and a triangular waveform output signal of a triangular wave generating circuit as the other input.
Claim 4
Dependent Claim
43 words
A charging control apparatus according to Claim 1, wherein the predetermined reference voltage applied to said comparing means is decreased to a second predetermined voltage under control of said enable control means while said maximum signal generating means is generating the maximum signal.
Claim 5
Dependent Claim
30 words
A charging control apparatus according to Claim 3, wherein said second predetermined reference voltage is a minimum voltage required for preventing complete consumption of the charged voltage of said battery.
Claim 6
Dependent Claim
40 words
A charging control apparatus according to Claim 2, further comprising control means for enabling said comparing means in lieu of said enable control means when the value of the output signal of said conduction rate detecting means exceeds a setting.
Claim 7
Dependent Claim
39 words
A charging control apparatus according to Claim 1, wherein said predetermined value in the maximum signal generated from said maximum signal generating means is increased with the increase in the conduction rate detected by said conduction rate detecting means.
Claim 8
Dependent Claim
138 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means for controlling current supplied to said field winding; voltage responsive means for detecting the voltage of said battery thereby controlling said switching means so as to maintain the battery voltage at a predetermined value; load detecting means for detecting connection of an electrical load to said vehicle's a.c. generator; and field current control means responsive to the connection of said electrical load, said field current control means initially setting said field current at a value larger by a predetermined value than that of said field current supplied at the time of the connection of said electrical load and then gradually increasing the value of said field current.
Claim 9
Dependent Claim
138 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means for controlling current supplied to said field winding; voltage responsive means for detecting the voltage of said battery thereby controlling said switching means so as to maintain the battery voltage at a predetermined value; load detecting means for detecting connection of an electrical load to said vehicle's a.c. generator; and field current control means responsive to the connection of said electrical load, said field current control means initially setting said field current at a value larger by a predetermined value than that of said field current supplied at the time of the connection of said electrical load and then gradually increasing the value of said field current.
Claim 10
Dependent Claim
41 words
A charging control apparatus according to Claim 7, wherein said field current control means increases said predetermined value in an accelerating fashion depending on the value of said field current supplied at the time of the connection of said electrical load.
Claim 11
Dependent Claim
40 words
A charging control apparatus according to Claim 7 or 8, wherein said field current control means includes disable control means for disabling the operation of said field current control means when the value of said field current exceeds a setting.
Claim 12
Dependent Claim
163 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means connected in series with said field winding; voltage control means for detecting the voltage of said battery thereby controlling said switching means so as to regulate current supplied to said field winding for maintaining the battery voltage at a desired value; current detecting means for detecting the current supplied to said field winding to generate an output signal having a value which is a function of the detected current; load detecting means for detecting connection of an electrical load to said vehicle's a.c. generator; and field current control means responsive to the detection of the connection of said electrical load by said load detecting means, said field current control means acting to gradually increase said field current until the value of the output signal of said current detecting means attains a setting.
Claim 13
Dependent Claim
163 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means connected in series with said field winding; voltage control means for detecting the voltage of said battery thereby controlling said switching means so as to regulate current supplied to said field winding for maintaining the battery voltage at a desired value; current detecting means for detecting the current supplied to said field winding to generate an output signal having a value which is a function of the detected current; load detecting means for detecting connection of an electrical load to said vehicle's a.c. generator; and field current control means responsive to the detection of the connection of said electrical load by said load detecting means, said field current control means acting to gradually increase said field current until the value of the output signal of said current detecting means attains a setting.
Claim 14
Dependent Claim
185 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means connected in series with said field winding; voltage control means for detecting the voltage of said battery thereby controlling on-off of said switching means so as to regulate current supplied to said field winding for maintaining the battery voltage at a desired value; integrator means connected to said switching means and including a resistor and a capacitor repeatedly charged and discharged in response to the on-off of said switching means, said integrator means detecting the conduction rate of said switching means and generating an output signal having a value which is a function of the conduction rate of said switching means; maximum signal generating means for generating an output signal representing an on-period ratio larger by a predetermined value than that of the output signal of said integrator means; and enable control means for enabling the operation of said voltage control means in response to the output signal of said maximum signal generating means.
Claim 15
Dependent Claim
185 words
A charging control apparatus for a vehicle, comprising: a vehicle's a.c. generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means connected in series with said field winding; voltage control means for detecting the voltage of said battery thereby controlling on-off of said switching means so as to regulate current supplied to said field winding for maintaining the battery voltage at a desired value; integrator means connected to said switching means and including a resistor and a capacitor repeatedly charged and discharged in response to the on-off of said switching means, said integrator means detecting the conduction rate of said switching means and generating an output signal having a value which is a function of the conduction rate of said switching means; maximum signal generating means for generating an output signal representing an on-period ratio larger by a predetermined value than that of the output signal of said integrator means; and enable control means for enabling the operation of said voltage control means in response to the output signal of said maximum signal generating means.
Claim 16
Dependent Claim
73 words
A charging control apparatus according to Claim 11, wherein said maximum signal generating means includes a comparator receiving the voltage of said capacitor in said integrator means as one of inputs and a triangular waveform output voltage of a triangular wave generating circuit as the other input, and said comparator generates a rectangular waveform output signal representing the on-period ratio larger by the predetermined value than the conduction rate of said switching means.
Claim 17
Dependent Claim
166 words
A charging control apparatus for a vehicle, comprising: a vehicle's generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means connected in series with said field winding; comparing means receiving the output voltage of said vehicle's a.c. generator as an input for comparing said output voltage with a predetermined reference voltage applied as the other input, thereby controlling said switching means on the basis of the result of comparison; integrator means for detecting the conduction rate of said switching means to generate an output signal having a value which is a function of the conduction rate of said switching means; maximum signal generating means for generating a maximum signal having a value larger by a predetermined value than that of the output signal of said integrator means; and enable control means for enabling said comparing means to generate its output signal depending on the value of the maximum signal generated from said maximum signal generating means.
Claim 18
Dependent Claim
166 words
A charging control apparatus for a vehicle, comprising: a vehicle's generator including a stator winding and a field winding and driven by an engine to charge a battery; switching means connected in series with said field winding; comparing means receiving the output voltage of said vehicle's a.c. generator as an input for comparing said output voltage with a predetermined reference voltage applied as the other input, thereby controlling said switching means on the basis of the result of comparison; integrator means for detecting the conduction rate of said switching means to generate an output signal having a value which is a function of the conduction rate of said switching means; maximum signal generating means for generating a maximum signal having a value larger by a predetermined value than that of the output signal of said integrator means; and enable control means for enabling said comparing means to generate its output signal depending on the value of the maximum signal generated from said maximum signal generating means.
Claim 19
Dependent Claim
72 words
A charging control apparatus according to Claim 13, wherein said maximum signal generating means includes a comparator receiving the output signal of said integrator means as one of inputs and a triangular waveform output signal of a trianguiar wave generating circuit as the other input, and said comparator generates a rectangular waveform output signal having the value larger by the predetermined value than that of the output signal of said integrator means.
Claim 20
Dependent Claim
44 words
A charging control apparatus according to Claim 13, wherein the predetermined reference voltage applied to said comparing means is decreased to a second predetermined reference voltage under control of said enable control means while said maximum signal generating means is generating the maximum signal.
Claim 21
Dependent Claim
30 words
A charging control apparatus according to Claim 15, wherein said second predetermined reference voltage is a minimum voltage required for preventing complete depletion of the charged voltage of said battery.
Claim 22
Dependent Claim
38 words
A charging control apparatus according to Claim 13, further comprising control means for enabling said comparing means in lieu of said enable control means when the value of the output signal of said integrator means exceeds a setting.
References Cited (Backward Citations)
No citation records indexed.
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