EP0119793A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Driveline for regenerative braking
Assignee: Leyland Vehicles Ltd
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Filing: 1984-03-09
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Granted: —
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Expires: 2004-03-09
Abstract
Abstract A diesel engine (1) drives an axle (4) through a continuously-variable-ratio transmission (3), e.g. of the toroidal race rolling friction type. A flywheel system (5) is coupled to the input of the transmission (3) by reduction gearing (8, 9). Sprag clutches (2, 6) ensure that the transmission selects whichever is the faster of the engine or the flywheel, and a multiplate clutch (7) parallel with the flywheel sprag clutch (6) is engaged for regenerative braking. Parasitic losses during flywheel drive are reduced by operating the flywheel in a referred speed range coinciding with the engine speed range.
Inventors
- 👤 Christopher John Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 03:07
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/08; B60K6/10; B60K6/105; B60T; B60T1/00; B60T1/02; B60T1/10; F; F02; F02B; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
1) A driveline for a vehicle, comprising a continuously-variable-ratio transmission (3), an engine (1) for driving the transmission, a flywheel system (5) for the regenerative braking of the vehicle, an engine clutch (2) for coupling the engine to an input of the transmission only when its speed on the engine side would exceed that on the transmission side, and characterized by a first flywheel clutch (6) coupling the flywheel system to the transmission input only when its speed on the flywheel side would exceed that on the transmission side, and a second flywheel clutch (7) parallel to the first, and operable to couple the flywheel to the transmission input for regenerative braking.
Claim 2
Dependent Claim
112 words
1) A driveline for a vehicle, comprising a continuously-variable-ratio transmission (3), an engine (1) for driving the transmission, a flywheel system (5) for the regenerative braking of the vehicle, an engine clutch (2) for coupling the engine to an input of the transmission only when its speed on the engine side would exceed that on the transmission side, and characterized by a first flywheel clutch (6) coupling the flywheel system to the transmission input only when its speed on the flywheel side would exceed that on the transmission side, and a second flywheel clutch (7) parallel to the first, and operable to couple the flywheel to the transmission input for regenerative braking.
Claim 3
Dependent Claim
37 words
2) A driveline in accordance with Claim 1, wherein the engine clutch (2) is an over-running clutch which is arranged automatically to disengage when the speed on its transmission side would exceed that on its engine side.
Claim 4
Dependent Claim
40 words
3) A driveline in accordance with Claim 1 or 2, wherein the first flywheel clutch (6) is an over-running clutch which is arranged automatically to disengage when the speed on its transmission side would exceed that on its flywheel side.
Claim 5
Dependent Claim
34 words
4) A driveline in accordance with Claims 1, 2 or 3 wherein the second, parallel flywheel clutch (7) comprises a multiplate clutch and control means for engaging the clutch when regenerative braking is required.
Claim 6
Dependent Claim
48 words
5) A driveline in accordance with Claim 4, wherein the control means responds to the speeds on, the flywheel side and on the transmission side to engage the multiplate clutch (7) only when those speeds are equal and disengages the clutch when the flywheel is to be disengaged.
Claim 7
Dependent Claim
47 words
6) A driveline in accordance with Claim 4, or 5, wherein the multiplate clutch (7), when disengaged, still transmits, by means of an hydraulic coupling, sufficient power from the transmission input to maintain a minimum flywheel speed during cruising with the engine coupled to the transmission input.
Claim 8
Dependent Claim
47 words
7) A driveline in accordance with claim 4, or 5, comprising means for modulating the engagement of the multiplate clutch (7) in order to transmit sufficient power from the transmission input to maintain a minimum flywheel speed during cruising with the engine coupled to the transmission input.
Claim 9
Dependent Claim
52 words
8) A driveline in accordance with any of Claims 1 to 7, comprising a further clutch (10) in series with the first (6) and second (7) parallel clutch means, independently for disconnecting the flywheel from the transmission input, at any desired flywheel speed, the further clutch including means for modulating its re-engagement.
Claim 10
Dependent Claim
43 words
9) A driveline in accordance with any of Claims 1 to 8, wherein the first and second, parallel clutches are connected to the transmission input through a drive transfer gearing arrangement (8, 9), the engine clutch being connected directly to the transmission input.
Claim 11
Dependent Claim
60 words
10) A driveline in accordance with any of Claims 1 to 9, wherein the upper working ranges of the engine and flywheel speeds referred to the transmission input substantially coincide, a minimum working flywheel speed being within the range of the referred engine speeds, and the maximum referred working flywheel speed substantially coinciding with the maximum referred working engine speed.
Claim 12
Dependent Claim
25 words
11) A driveline in accordance with any of Claims 1 to 10, wherein the continuously-variable-ratio transmission (3) is of the toroidal race rolling traction type.
References Cited (Backward Citations)
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