US5808367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for vehicle generator and control method therefor
Assignee: Hitachi Ltd
•
Filing: 1996-04-11
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Granted: 1998-09-15
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Expires: 2016-04-11
Abstract
Abstract A method for controlling a vehicle generator, by obtaining a first correction volume of an opening of an ISC valve (ISCPI) based on a deviation of a rotation number of an internal combustion engine from a target rotation number, obtaining a driving volume of an excitation coil of a generator based on a deviation of a battery voltage from a target voltage, and obtaining a second correction volume of an opening of the ISC valve (EL) that takes account of an electrical load variation based on a driving volume of the excitation coil and a rotation number of the internal combustion engine, to obtain a driving volume of the ISC valve (ISCDTY) based on the first and second correction volumes of the opening of the ISC valve.
Inventors
- 👤 Yoshihiko Akagi
- 👤 Masakatsu Fujishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:24
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/08; F02D41/083; F02D31/00; F02D31/001; F02D31/002; F02D31/003; F02D31/005; H; H02; H02J; H02J7/00; H02J7/14; H02J7/1446; H02P; H02P9/00; H02P9/04; H02P9/10; H02P9/107; H02P9/14; H02P9/26; H02P9/30; H02P9/305; F02D2200/00; F02D2200/50; F02D2200/503; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/70
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
254 words
A control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; driving status detecting means for detecting a driving status of said internal combustion engine by detecting at least a rotation number of said internal combustion engine, an opening of a throttle valve and a temperature of a cooling water; intake air quantity adjusting means for adjusting a quantity of an intake air during an idling; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; means for driving said excitation coil; a battery to be charged by power generated by said generator; and means for detecting a voltage of said battery, wherein said operating unit includes: means for setting a driving volume of said intake air quantity adjusting means; means for calculating a target generation voltage according to a driving status of said internal combustion engine; means for calculating driving volume (ALTDTY, 224) of said excitation coil so that a voltage of said battery comes close to said target generation voltage by comparing said target generation voltage with said battery voltage; and means for correcting a driving volume of said intake air quantity adjusting means by a first correction volume (ISCPI, 209) based on a rotation number of said internal combustion engine and a second correction volume (EL, 210) based on a driving volume of said excitation coil and said detected driving status.
Claim 2
Dependent Claim
254 words
A control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; driving status detecting means for detecting a driving status of said internal combustion engine by detecting at least a rotation number of said internal combustion engine, an opening of a throttle valve and a temperature of a cooling water; intake air quantity adjusting means for adjusting a quantity of an intake air during an idling; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; means for driving said excitation coil; a battery to be charged by power generated by said generator; and means for detecting a voltage of said battery, wherein said operating unit includes: means for setting a driving volume of said intake air quantity adjusting means; means for calculating a target generation voltage according to a driving status of said internal combustion engine; means for calculating driving volume (ALTDTY, 224) of said excitation coil so that a voltage of said battery comes close to said target generation voltage by comparing said target generation voltage with said battery voltage; and means for correcting a driving volume of said intake air quantity adjusting means by a first correction volume (ISCPI, 209) based on a rotation number of said internal combustion engine and a second correction volume (EL, 210) based on a driving volume of said excitation coil and said detected driving status.
Claim 3
Dependent Claim
46 words
A control system for a vehicle generator according to claim 1, wherein said means for correcting said intake air quantity adjusting means includes means (210) for multiplying a driving volume of said excitation coil with a value obtained from load characteristics of said internal combustion engine.
Claim 4
Dependent Claim
35 words
A control system for a vehicle generator according to claim 1, further including means (225, 226) for changing a speed of changing a driving volume of said excitation coil according to a detected driving status.
Claim 5
Dependent Claim
59 words
A control system for a vehicle generator according to claim 3, wherein said means for changing a speed of changing a driving volume of said excitation coil includes: means (225) for detecting an electrical load status; and means (226) for changing a speed of changing a driving volume of said excitation coil based on said detected electrical load status.
Claim 6
Dependent Claim
58 words
A control system for a vehicle generator according to claim 3, wherein said means for changing a speed of changing a driving volume of said excitation coil includes means for setting a speed of increasing a driving volume of said excitation coil to be smaller than a maximum speed of decreasing a driving volume of said excitation coil.
Claim 7
Dependent Claim
81 words
A control system for a vehicle generator according to claim 1, further including: failure detecting means (301) for detecting a failure of said operating unit; and auxiliary control means (302) for controlling said internal combustion engine in place of said operating unit when said failure detecting means detected a failure of said operating unit, and said auxiliary control means includes means (SW1) for interrupting a current of said excitation coil when a battery voltage has become a predetermined value or above.
Claim 8
Dependent Claim
79 words
A control system for a vehicle generator according to claim 1, further including: means (212) for detecting whether it has become necessary to raise a voltage of said battery; and means (213, 214) for raising a voltage of said battery by increasing a target rotation number of said internal combustion engine when a driving volume of said excitation coil is at least a predetermined value at a time when it becomes necessary to raise a voltage of said battery.
Claim 9
Dependent Claim
98 words
A control system for a vehicle generator according to claim 1, wherein said means for calculating said target generation voltage includes: means for sampling a temperature of a cooling water of said internal combustion engine at every predetermined time; means for carrying out a weighted average processing of a result obtained by said sampling; means for estimating a temperature of said battery liquid from a value obtained by said weighted average processing; and means (FIG. 8) for correcting said target generation voltage based on a relation between an estimated temperature of said battery liquid and a charging voltage.
Claim 10
Dependent Claim
86 words
A control system for a vehicle generator according to claim 8, wherein said means for estimating a temperature of said battery liquid includes: means for comparing a current temperature of a cooling water of said internal combustion engine with a memory value of a cooling water temperature after a weighted average processing stored at a time when said internal combustion engine stopped; and means (FIG. 17) for setting a value whichever is lower as an estimated value of a battery liquid temperature at a starting time.
Claim 11
Dependent Claim
203 words
In a control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; intake air quantity adjusting means for adjusting a quantity of an intake air during an idling; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; and a battery to be charged by power generated by said generator, a method for controlling a vehicle generator, including: a step (202) for obtaining a rotation number N of said internal combustion engine; a step (207) for obtaining a target rotation number NSET of said internal combustion engine from a temperature of a cooling water; a step (208) for obtaining a rotation number deviation .increment.N1=NSET-N; a step (209) for setting a first correction volume of an intake air quantity during an idling based on said rotation number deviation .increment.N1; a step (210) for setting a second correction volume (EL) of an intake air quantity during an idling based on an electrical load volume; and a step (211) for adjusting an intake air quantity during an idling based on said first and second correction volumes.
Claim 12
Dependent Claim
203 words
In a control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; intake air quantity adjusting means for adjusting a quantity of an intake air during an idling; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; and a battery to be charged by power generated by said generator, a method for controlling a vehicle generator, including: a step (202) for obtaining a rotation number N of said internal combustion engine; a step (207) for obtaining a target rotation number NSET of said internal combustion engine from a temperature of a cooling water; a step (208) for obtaining a rotation number deviation .increment.N1=NSET-N; a step (209) for setting a first correction volume of an intake air quantity during an idling based on said rotation number deviation .increment.N1; a step (210) for setting a second correction volume (EL) of an intake air quantity during an idling based on an electrical load volume; and a step (211) for adjusting an intake air quantity during an idling based on said first and second correction volumes.
Claim 13
Dependent Claim
60 words
A control method according to claim 10, wherein said step for setting a first correction volume of an intake air quantity includes a step for setting said first correction volume by referring to a table (FIG. 6) for showing a relation between said rotation number deviation .increment.N1 and an adjusting volume of said intake air adjusting means during an idling.
Claim 14
Dependent Claim
73 words
A control method according to claim 10, further including: a step (223) for detecting a voltage deviation between a target generation voltage and an actual battery voltage; and a step (224) for obtaining an excitation coil driving volume of a vehicle generator based on said voltage deviation, and said step for setting a second correction volume includes a step for obtaining said second correction volume based on said excitation coil driving volume obtained.
Claim 15
Dependent Claim
72 words
A control method according to claim 12, wherein said step for obtaining said second correction volume (EL) includes a step for obtaining said second correction volume based on the following expression: a second correction volume=K×ALTDTY×B×N where, K represents a conversion coefficient, ALTDTY represents an excitation coil driving volume, B represents a value based on load characteristics of an internal combustion engine and N represents a rotation number of said internal combustion engine.
Claim 16
Dependent Claim
48 words
A control method according to claim 13, wherein said step for obtaining said second correction volume includes a step for obtaining a torque of a generator determined from a rotation number of an internal combustion engine as a value based on load characteristics of an internal combustion engine.
Claim 17
Dependent Claim
44 words
A control method according to claim 12, further including: a step (225) for monitoring a driving status of an internal combustion engine; and a step (226) for controlling a speed of changing a driving volume of said excitation coil according to a driving status.
Claim 18
Dependent Claim
109 words
A control method according to claim 15, wherein said step for monitoring a driving status includes a step for monitoring a variation of an electrical load, and said step for controlling a speed of changing a driving volume of said excitation coil includes a step for limiting a speed of changing a driving volume of said excitation coil when a variation of said electrical load has exceeded a predetermined value and for controlling said excitation coil with an excitation coil driving volume obtained at said step for obtaining a driving volume of said excitation coil when a variation of said electrical load is not higher than a predetermined value.
Claim 19
Dependent Claim
29 words
A control method according to claim 15, wherein said step for monitoring a variation of an electrical load includes a step for detecting a variation of a battery voltage.
Claim 20
Dependent Claim
55 words
A control method according to claim 15, wherein said step for controlling a speed of changing a driving volume of said excitation coil includes a step for setting a speed of increasing a driving volume of said excitation coil to be smaller than a maximum speed of decreasing a driving volume of said excitation coil.
Claim 21
Dependent Claim
66 words
A control method according to claim 12, further including: a step (212) for determining whether it is possible to increase a driving volume of said excitation coil when it becomes necessary to further raise a battery voltage; and steps (213, 214) for setting said target rotation number NSET to a higher value when it is not possible to increase a driving volume of said excitation coil.
Claim 22
Dependent Claim
99 words
A control method according to claim 12, wherein said step for detecting a voltage deviation of an actual battery voltage from a target generation voltage includes: a step for sampling a temperature of a cooling water of said internal combustion engine at every predetermined time; a step for carrying out a weighted average processing of a result obtained by said sampling; a step (220) for estimating a temperature of said battery liquid from a value obtained by said weighted average processing; and a step (221) for determining said target generation voltage from said estimated temperature of a battery liquid.
Claim 23
Dependent Claim
89 words
A control method according to claim 20, wherein said step for estimating a temperature of a battery liquid includes: a step comparing a current temperature of a cooling water of said internal combustion engine with a memory value of a cooling water temperature after a weighted average processing stored at a time when said internal combustion engine stopped; and a step (FIG. 17) for setting a value whichever is lower as a result of said comparison as an estimated value of a battery liquid temperature at a starting time.
Claim 24
Dependent Claim
155 words
In a control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; and a battery to be charged by power generated by said generator, a method for controlling a vehicle generator, including: a step (220) for obtaining a battery liquid temperature; a step (221) for obtaining a target generation voltage of said generator based on a relation between a battery liquid temperature and a charge finishing voltage of said battery; a step (222) for detecting a battery voltage; a step (223) for obtaining a voltage deviation of said battery voltage from said target generation voltage; and a step (224) for obtaining a driving volume of said excitation coil of said generator from said voltage deviation.
Claim 25
Dependent Claim
155 words
In a control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; and a battery to be charged by power generated by said generator, a method for controlling a vehicle generator, including: a step (220) for obtaining a battery liquid temperature; a step (221) for obtaining a target generation voltage of said generator based on a relation between a battery liquid temperature and a charge finishing voltage of said battery; a step (222) for detecting a battery voltage; a step (223) for obtaining a voltage deviation of said battery voltage from said target generation voltage; and a step (224) for obtaining a driving volume of said excitation coil of said generator from said voltage deviation.
Claim 26
Dependent Claim
49 words
A control method according to claim 22, further including: a step (225) for detecting a variation of an electrical load; and a step (226) for controlling a speed of changing a driving volume of said excitation coil when a variation of said electrical load has exceeded a predetermined value.
Claim 27
Dependent Claim
31 words
A control method according to claim 23, wherein said step for detecting a variation of an electrical load includes a step for detecting a variation of a voltage of said battery.
Claim 28
Dependent Claim
55 words
A control method according to claim 23, wherein said step for limiting a speed of changing a driving volume of said excitation coil includes a step for setting a speed of increasing a driving volume of said excitation coil to be smaller than a maximum speed of decreasing a driving volume of said excitation coil.
Claim 29
Dependent Claim
187 words
A control method according to claim 23, wherein said step for limiting a speed of increasing a driving volume of said excitation coil includes, when an intake air quantity has been set to zero by said intake air quantity adjusting means: a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a first value when a rotation number of said internal combustion engine is higher than a predetermined value; a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a second value when a rotation number of said internal combustion engine is not higher than a predetermined value and an electrical load exceeds a predetermined value; and a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a third value when a rotation number of said internal combustion engine is not higher than a predetermined value and an electrical load is not higher than a predetermined value, where, said first value>said second value>said third value (FIG. 10).
Claim 30
Dependent Claim
234 words
In a control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; intake air quantity adjusting means for adjusting a quantity of an intake air during an idling; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; and a battery to be charged by power generated by said generator, a method for controlling a vehicle generator (FIG. 10), including: a step of setting a limit value of a speed of changing a driving volume of said excitation coil to a first value when a rotation number of said internal combustion engine is higher than a predetermined value; a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a second value when a rotation number of said internal combustion engine is not higher than a predetermined value and an electrical load exceeds a predetermined value; and a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a third value when a rotation number of said internal combustion engine is not higher than a predetermined value and an electrical load is not higher than a predetermined value, where, said first value>said second value>said third value.
Claim 31
Dependent Claim
234 words
In a control system for a vehicle generator, comprising: an internal combustion engine mounted on a vehicle; an operating unit for controlling a driving of said internal combustion engine; intake air quantity adjusting means for adjusting a quantity of an intake air during an idling; a generator driven by said internal combustion engine, for generating power; an excitation coil incorporated in said generator, for controlling a generation volume; and a battery to be charged by power generated by said generator, a method for controlling a vehicle generator (FIG. 10), including: a step of setting a limit value of a speed of changing a driving volume of said excitation coil to a first value when a rotation number of said internal combustion engine is higher than a predetermined value; a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a second value when a rotation number of said internal combustion engine is not higher than a predetermined value and an electrical load exceeds a predetermined value; and a step for setting a limit value of a speed of changing a driving volume of said excitation coil to a third value when a rotation number of said internal combustion engine is not higher than a predetermined value and an electrical load is not higher than a predetermined value, where, said first value>said second value>said third value.
Claim 32
Independent Claim
130 words
A method for controlling a vehicle generator, including: a step (209) for obtaining a first correction volume of an opening of an ISC valve based on a deviation of a rotation number of an internal combustion engine from a target rotation number; a step (224) for obtaining a driving volume of an excitation coil of a generator based on a deviation of a battery voltage from a target voltage; a step (210) for obtaining a second correction volume of an opening of said ISC valve based on a driving volume of said excitation coil and a rotation number of said internal combustion engine; and a step (211) for obtaining a driving volume of said ISC valve from said first and second correction volumes of an opening of said ISC valve.
Claim 33
Independent Claim
130 words
A method for controlling a vehicle generator, including: a step (209) for obtaining a first correction volume of an opening of an ISC valve based on a deviation of a rotation number of an internal combustion engine from a target rotation number; a step (224) for obtaining a driving volume of an excitation coil of a generator based on a deviation of a battery voltage from a target voltage; a step (210) for obtaining a second correction volume of an opening of said ISC valve based on a driving volume of said excitation coil and a rotation number of said internal combustion engine; and a step (211) for obtaining a driving volume of said ISC valve from said first and second correction volumes of an opening of said ISC valve.
References Cited (Backward Citations)
JPS5986431A
Cited
JPS59103935A
Cited
JPS59128943A
Cited
JPS59211741A
Cited
JPS59229030A
Cited
JPS627339A
Cited
JPS6439306A
Cited
US4919096A
Cited
JPH01277650A
Cited
US4951627A
Cited
JPH02241399A
Cited
US5263447A
Cited
JPH03127458A
Cited
US5256959A
Cited
JPH04133700A
Cited
JPH05180047A
Cited
JPH05180055A
Cited
JPH0622468A
Cited
JPH06117288A
Cited
JPH06197472A
Cited
US5545928A
Cited
US5623903A
Cited
JPH07227047A
Cited
US5592918A
Cited
JPH0874619A
Cited
US5703410A
Cited
US5685285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-14 | 2002-03-16 | 2002-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-14 | 2006-03-16 | 2006-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-14 | 2010-03-16 | 2010-09-15 | $7700.00 | Window Closed / Lapsed |