EP0751602A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vehicle generator control system
Assignee: Denso Corp
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Filing: 1996-06-21
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Granted: —
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Expires: 2016-06-21
Abstract
Abstract A generator unit includes an alternator and a generator control system. The alternator is driven by an engine to achieve the power generation for charging a battery. The generator control system includes a transistor for intermitting a field current therethrough so as to control the power generation of the alternator. The system further includes a switching circuit which suppresses the duty of the transistor to a low value, where the alternator can not perform the power generation for the battery, until complete explosion of the engine is detected. On the other hand, when the complete explosion is detected, the duty of the transistor is switched to a value where the alternator can perform the power generation for the battery. The duty of the transistor is then increased gradually to 100%.
Inventors
- 👤 Toorn Aoyama
- 👤 Kouzi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:29
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/48; H02J; H02J7/00; H02J7/14; H02J7/1446; H02J7/16; H02J7/24; H02J7/2434; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A generator control system for controlling an output of a generator driven by an engine, comprising: an output control device (23) for changing the output of the generator in response to an output command value; discriminating means (25) (s4) for discriminating between an engine cranking state and an engine self-rotating state; suppressing means (26) (s5) for suppressing the output command value to said output control device so as to stop or limit the output of the generator when said engine cranking state is discriminated by said discriminating means; and increasing means (27, 28, 21) (5, s6) for gradually increasing the output command value to said output control device after said engine self-rotating state is discriminated by said discriminating means.
Claim 2
Dependent Claim
93 words
The generator control system according to claim 1, wherein said discriminating means comprises detecting means for producing a detection signal indicative of an engine speed, said discriminating means having a detection level (Vc) (Nr) which is set between an upper limit speed when the engine is cranked and a lower limit speed under idling where the engine rotates by itself, and wherein said discriminating means discriminates between said engine cranking state and said engine self-rotating state based on a comparison between said detection level and said detection signal produced by said detecting means.
Claim 3
Dependent Claim
36 words
The generator control system according to claim 2, wherein said detecting means produces said detection signal depending on the output of the generator outputted as a function of the output command value and the engine speed.
Claim 4
Dependent Claim
58 words
The generator control system according to claim 3, wherein said suppressing means (26) suppresses the output command value to said output control device to a fixed value, and wherein said discriminating means discriminates between said engine cranking state and said engine self-rotating state based on the output of the generator achieved by said suppressed fixed output command value.
Claim 5
Dependent Claim
36 words
The generator control system according to claim 4, wherein said increasing means gradually increases the output command value starting from a value which is greater than the fixed output command value given by said suppressing means.
Claim 6
Dependent Claim
112 words
The generator control system according to claim 5, wherein said increasing means comprises control means (21) (5) for giving the output command value to said output control device so that the output of the generator converges to a given target value, integrating means (27) for integrating the output command value given to said output control device, and limiting means (28) for limiting the output command value given to said output control device depending on an integration output from said integrating means, and wherein said integrating means is arranged to further integrate a control amount of said output control device determined depending on the fixed output command value given by said suppressing means.
Claim 7
Dependent Claim
37 words
The generator control system according to claim 6, wherein said integrating means is arranged to integrate a control amount of said output control device determined depending on the output command value given to said output control device.
Claim 8
Dependent Claim
29 words
The generator control system according to claim 4, wherein said detecting means is inputted with an output of the generator at one end of stator coils of the generator.
Claim 9
Dependent Claim
40 words
The generator control system according to claim 4, wherein said suppressing means feeds the fixed output command value corresponding to an exciting current which can be continuously supplied to the generator in a state where the generator is not rotated.
Claim 10
Dependent Claim
27 words
The generator control system according to claim 9, wherein said suppressing means suppresses the output command value to said output control device to no more than 20%.
Claim 11
Dependent Claim
25 words
The generator control system according to claim 9, wherein said suppressing means suppresses the output command value to said output control device to about 15%.
Claim 12
Dependent Claim
30 words
The generator control system according to claim 2, wherein said detecting means is inputted with a signal (Ne) (532) from an engine speed sensor monitoring a speed of the engine.
Claim 13
Dependent Claim
80 words
The generator control system according to claim 12, further comprising means (s2) for detecting an operation of an engine starter, and wherein said discriminating means includes first discriminating means (s4) for discriminating said engine self-rotating state when the engine speed (Ne) exceeds said detection level (Nr) during the engine starter being operated, and second discriminating means (s7) for discriminating said engine self-rotating state when the engine speed (Ne) exceeds said lower limit idling speed during the engine starter being stopped.
Claim 14
Dependent Claim
68 words
The generator control system according to claim 1, wherein said increasing means comprises control means (21) (5) for giving the output command value to said output control device so that the output of the generator converges to a given target value, and limiting means (27, 28) (5, s6) for limiting an increasing rate of the output command value given to said output control device from said control means.
Claim 15
Dependent Claim
19 words
The generator control system according to claim 14, wherein said control means (21) is provided integral with the generator.
Claim 16
Dependent Claim
16 words
The generator control system according to claim 15, wherein said control means (5) includes a microcomputer.
Claim 17
Dependent Claim
32 words
The generator control system according to claim 1, wherein said output control device (23) is an element which controls an exciting current of the generator in response to the output command value.
Claim 18
Dependent Claim
29 words
The generator control system according to claim 1, further comprising display means (3) which changes a display state when said engine self-rotating state is discriminated by said discriminating means.
References Cited (Backward Citations)
No citation records indexed.
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