EP0366087A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Regenerative braking system for car
Assignee: Isuzu Motors Ltd
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Filing: 1989-10-24
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Granted: —
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Expires: 2009-10-24
Abstract
Abstract A regenerative braking system regulates the pumping capacity of a pump/motor (14) by determining exhaust/engine brake equivalent torque corresponding to car speed and gear position when the car speed exceeds a predetermined speed and the exhaust brake switch is operated, decoupling the engine (1) of the car, closing the hydraulic oil circuit, controlling the pumping capacity, and coupling an electromagnetic clutch (13) to accumulate the deceleration energy of the car into the high pressure accumulator (26) as simulating deceleration by an exhaust/engine brake.
Inventors
- 👤 Tanaka Koji
- 👤 Shima Takashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 20:33
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; Y10S188/00; Y10S188/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A regenerative braking system for car comprising; a hydraulic oil circuit formed of a high pressure accumulator, a pump/motor, a circuit valve, and a low pressure accumulator, an electromagnetic clutch for connecting or disconnecting said pump/motor to or from a PTO unit, manually operating means for an exhaust brake, means for sensing the gear position of a transmission, means for sensing car speed, means for sensing the inner pressure of said hydraulic circuit, and control means for determining the pumping capacity of said pump/motor responsive to the inner pressure by determining exhaust brake equivalent torque corresponding to said car speed and said gear position when said car speed exceeds a predetermined speed and said manually operating means is operated, said control means then decoupling the engine of the car, closing said hydraulic oil circuit, controlling the pumping capacity, and coupling said electromagnetic clutch, whereby the deceleration energy of the car is accumulated into the high pressure accumulator as if an exhaust brake works.
Claim 2
Dependent Claim
163 words
A regenerative braking system for car comprising; a hydraulic oil circuit formed of a high pressure accumulator, a pump/motor, a circuit valve, and a low pressure accumulator, an electromagnetic clutch for connecting or disconnecting said pump/motor to or from a PTO unit, manually operating means for an exhaust brake, means for sensing the gear position of a transmission, means for sensing car speed, means for sensing the inner pressure of said hydraulic circuit, and control means for determining the pumping capacity of said pump/motor responsive to the inner pressure by determining exhaust brake equivalent torque corresponding to said car speed and said gear position when said car speed exceeds a predetermined speed and said manually operating means is operated, said control means then decoupling the engine of the car, closing said hydraulic oil circuit, controlling the pumping capacity, and coupling said electromagnetic clutch, whereby the deceleration energy of the car is accumulated into the high pressure accumulator as if an exhaust brake works.
Claim 3
Dependent Claim
32 words
A regenerative braking system for car according to claim 1, wherein said control means include therein a map previously storing car speed data, exhaust brake equivalent torque data, and inner pressure data.
Claim 4
Dependent Claim
40 words
A regenerative braking system for car according to claim 1, wherein said control means switch over said circuit valve so that said hydraulic circuit may have therein the hydraulic flow from said low pressure accumulator to said high pressure accumulator.
Claim 5
Dependent Claim
22 words
A regenerative braking system for car according to claim 1, wherein said control means control an engine clutch to decouple the engine.
Claim 6
Dependent Claim
41 words
A regenerative braking system for car according to claim 1, wherein said predetermined car speed at the time when said control means bigin to work is set higher than that at the time when said control means then continue to work.
Claim 7
Dependent Claim
161 words
A regenerative braking system for car comprising: a hydraulic oil circuit formed of a high pressure accumulator, a pump/motor, and a low pressure accumulator, an electromagnetic clutch for connecting or disconnecting said pump/motor to or from a PTO unit, manually operating means for an exhaust brake, means for sensing the gear position of a transmission, means for sensing car speed, means for sensing the inner pressure of said hydraulic circuit, and control means for determining the pumping capacity of said pump/motor responsive to the inner pressure by determining engine brake equivalent torque corresponding to said car speed and said gear position when said car speed exceeds a predetermined speed and said manually operating means is not operated, said control means then decoupling the engine of the car, closing said hydraulic oil circuit, controlling the pumping capacity, and coupling said electromagnetic clutch, whereby the deceleration energy of the car is accumulated into the high pressure accumulator as if an engine brake works.
Claim 8
Dependent Claim
161 words
A regenerative braking system for car comprising: a hydraulic oil circuit formed of a high pressure accumulator, a pump/motor, and a low pressure accumulator, an electromagnetic clutch for connecting or disconnecting said pump/motor to or from a PTO unit, manually operating means for an exhaust brake, means for sensing the gear position of a transmission, means for sensing car speed, means for sensing the inner pressure of said hydraulic circuit, and control means for determining the pumping capacity of said pump/motor responsive to the inner pressure by determining engine brake equivalent torque corresponding to said car speed and said gear position when said car speed exceeds a predetermined speed and said manually operating means is not operated, said control means then decoupling the engine of the car, closing said hydraulic oil circuit, controlling the pumping capacity, and coupling said electromagnetic clutch, whereby the deceleration energy of the car is accumulated into the high pressure accumulator as if an engine brake works.
Claim 9
Dependent Claim
32 words
A regenerative braking system for car according to claim 6, wherein said control means include therein a map previously storing car speed data, exhaust brake equivalent torque data, and inner pressure data.
Claim 10
Dependent Claim
40 words
A regenerative braking system for car according to claim 6, wherein said control means switch over said circuit valve so that said hydraulic circuit may have therein the hydraulic flow from said low pressure accumulator to said high pressure accumulator.
Claim 11
Dependent Claim
22 words
A regenerative braking system for car according to claim 6, wherein said control means control an engine clutch to decouple the engine.
Claim 12
Dependent Claim
41 words
A regenerative braking system for car according to claim 6, wherein said predetermined car speed at the time when said control means bigin to work is set higher than that at the time when said control means then continue to work.
References Cited (Backward Citations)
No citation records indexed.
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