US4441573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-efficient energy storage automotive drive system
Assignee: Advanced Energy Systems Inc
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Filing: 1980-09-04
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Granted: 1984-04-10
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Expires: 2000-09-04
Abstract
Abstract A fuel-saving energy storage vehicle drive system which saves fuel, primarily under stop-and-go driving conditions, by collecting, storing and using energy normally lost in the braking or deceleration of the vehicle, by automatically controlled operation of the engine under certain conditions, and by automatically controlled use of the stored energy and engine respectively as alternative or supplemental prime movers for each other for driving the vehicle. Subsystems for preventing waste of deceleration energy and stored energy are provided, and compact transmission layout and packaging are provided which facilitate installation of the new system in existing vehicles.
Inventors
- 👤 Vincent E. Carman
- 👤 David H. Anderson
- 👤 Eugene F. Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:22
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/08; B60K6/12; B60T; B60T1/00; B60T1/02; B60T1/10; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
280 words
In a wheeled vehicle having an engine, a vehicle drive system comprising: (a) energy storage means for collecting and storing energy; (b) power transmission means mechanically coupled to at least one wheel of said vehicle for driving and being driven by said vehicle; (c) transmission control means for selectively connecting said power transmission means to said energy storage means for causing said power transmission means to deliver energy to said storage means for storage therein in response to the driving of said power transmission means by said vehicle to brake or decelerate said vehicle; (d) transmission control means for selectively connecting said power transmission means to said energy storage means for causing said power transmission means to receive energy from said storage means to drive said vehicle; (e) means for coupling said engine to said energy storage means for transmitting energy from said engine to said storage means for storage therein; (f) energy sensor means connected to said energy storage means for sensing the amount of energy stored therein; (g) control means connected responsively to said energy sensor means for stopping the transmission of energy from said engine to said storage means when the amount of energy in said storage means reaches a predetermined maximum value and for starting the transmission of energy from said engine to said storage means in response to a drop in the energy in said storage means to a predetermined minimum value; (h) vehicle speed sensor means for sensing the speed of said vehicle; and (i) means responsive to said vehicle speed sensor means for decreasing said predetermined maximum value in response to an increase in the speed of said vehicle from a predetermined speed.
Claim 2
Dependent Claim
280 words
In a wheeled vehicle having an engine, a vehicle drive system comprising: (a) energy storage means for collecting and storing energy; (b) power transmission means mechanically coupled to at least one wheel of said vehicle for driving and being driven by said vehicle; (c) transmission control means for selectively connecting said power transmission means to said energy storage means for causing said power transmission means to deliver energy to said storage means for storage therein in response to the driving of said power transmission means by said vehicle to brake or decelerate said vehicle; (d) transmission control means for selectively connecting said power transmission means to said energy storage means for causing said power transmission means to receive energy from said storage means to drive said vehicle; (e) means for coupling said engine to said energy storage means for transmitting energy from said engine to said storage means for storage therein; (f) energy sensor means connected to said energy storage means for sensing the amount of energy stored therein; (g) control means connected responsively to said energy sensor means for stopping the transmission of energy from said engine to said storage means when the amount of energy in said storage means reaches a predetermined maximum value and for starting the transmission of energy from said engine to said storage means in response to a drop in the energy in said storage means to a predetermined minimum value; (h) vehicle speed sensor means for sensing the speed of said vehicle; and (i) means responsive to said vehicle speed sensor means for decreasing said predetermined maximum value in response to an increase in the speed of said vehicle from a predetermined speed.
Claim 3
Dependent Claim
43 words
The system of claim 1 wherein said means responsive to said vehicle speed sensor means includes means for decreasing said predetermined maximum value by a predetermined amount in response to a predetermined increase in the speed of said vehicle from a predetermined speed.
Claim 4
Dependent Claim
52 words
The system of claim 1 wherein said control means includes means for stopping said engine when the amount of energy in said energy storage means reaches said predetermined maximum value and for starting said engine in response to a drop in the energy in said storage means to said predetermined minimum value.
Claim 5
Dependent Claim
41 words
The system of claim 3 wherein said control means includes selectively-actuated starter motor means connected to said engine for driving said engine, said starter motor means being connected to said energy storage means for receiving energy therefrom to drive said engine.
Claim 6
Dependent Claim
33 words
The system of claim 1 including engine governor means for maintaining the speed of said engine within a predetermined range while said engine delivers energy to said energy storage means for storage therein.
Claim 7
Dependent Claim
77 words
The system of claim 1, 2, 3, 4 or 5 wherein said energy storage means comprises hydraulic accumulator means for storing pressurized hydraulic fluid, said means for coupling said engine to said energy storage means comprising a hydraulic pump and said energy sensor means comprising means for sensing the pressure of fluid in said accumulator means, said power transmission means including hydraulic motor means for receiving pressurized hydraulic fluid from said accumulator means to drive said vehicle.
Claim 8
Independent Claim
158 words
A method for charging an energy storage device with energy for subsequent use in driving a wheeled vehicle having an engine, said method comprising: (a) transmitting energy through a power transmission from at least one wheel of said vehicle to said storage device for storage therein in response to the driving of said power transmission by said wheel to brake or decelerate said vehicle; (b) sensing the amount of energy stored in said storage device; (c) transmitting energy from said engine to said storage device for storage therein in response to a drop in the energy in said storage device to a predetermined minimum value and stopping the transmission of energy from said engine to said storage device when the amount of energy therein reaches a predetermined maximum value; (d) sensing the speed of said vehicle; and (e) decreasing said predetermined maximum value in response to an increase in the speed of said vehicle from a predetermined speed.
Claim 9
Independent Claim
158 words
A method for charging an energy storage device with energy for subsequent use in driving a wheeled vehicle having an engine, said method comprising: (a) transmitting energy through a power transmission from at least one wheel of said vehicle to said storage device for storage therein in response to the driving of said power transmission by said wheel to brake or decelerate said vehicle; (b) sensing the amount of energy stored in said storage device; (c) transmitting energy from said engine to said storage device for storage therein in response to a drop in the energy in said storage device to a predetermined minimum value and stopping the transmission of energy from said engine to said storage device when the amount of energy therein reaches a predetermined maximum value; (d) sensing the speed of said vehicle; and (e) decreasing said predetermined maximum value in response to an increase in the speed of said vehicle from a predetermined speed.
Claim 10
Dependent Claim
24 words
The method of claim 7 wherein said stopping of the transmission of energy from said engine to said storage device comprises stopping said engine.
Claim 11
Dependent Claim
36 words
The method of claim 7 or 8 wherein said energy storage device is a hydraulic accumulator for storing pressurized hydraulic fluid and said sensing step (b) comprises sensing the pressure of fluid in said hydraulic accumulator.
References Cited (Backward Citations)
US2518478A
Cited
US2628476A
Cited
US3277910A
Cited
DE1222318B
Cited
US3083800A
Cited
GB955604A
Cited
US3871235A
Cited
US3665788A
Cited
US3892283A
Cited
DE2462058A1
Cited
DE2462059A1
Cited
DE2451021A1
Cited
US4018052A
Cited
DE2454753A1
Cited
US3903696A
Cited
US4037409A
Cited
US4098085A
Cited
DE2515048A1
Cited
US4098144A
Cited
DE2551580A1
Cited
DE2637322A1
Cited
US4110982A
Cited
DE2641886A1
Cited
DE2649241A1
Cited
DE2754623A1
Cited
DE2810086A1
Cited
US4215545A
Cited
US4282947A
Cited
US4227587A
Cited
US4240515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |