EP0445873A1
Expired / Lapsed
EP
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Hybrid propulsion system for vehicles, in particular for road vehicles
Assignee: Piaggio Veicoli Europei SpA
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Filing: 1991-03-01
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Granted: —
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Expires: 2011-03-01
Abstract
Abstract In a hybrid propulsion system for vehicles in which a first propulsion unit, of internal combustion type (10) transmits motion to at least one wheel (26) of the vehicle via transmission members including at least one clutch (14), a second propulsion unit (20) of electrical type, is connected to the driven element of said clutch via means such that the motion generated by one of said propulsion units when the other is deactivated is transmitted only to the transmission members located downstream of said clutch.
Inventors
- 👤 Lucio Masut
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 03:57
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/36; B60K6/38; B60K6/383; B60K6/42; B60K6/48; B60K6/50; B60K6/54; B60K6/543; B60Y; B60Y2200/00; B60Y2200/10; B60Y2200/12; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A hybrid propulsion system for vehicles, in particular for road vehicles, comprising a first propulsion unit connected to a transmission unit arranged to transmit the motion generated by said propulsion unit to at least one wheel of said vehicle, said transmission unit including at least one clutch, characterised in that a second propulsion unit is connected to a driven element of said clutch, said connection being effected by means such that the motion generated by one of said propulsion units, when the other is deactivated, is transmitted only to those members of said transmission unit located downstream of said clutch.
Claim 2
Dependent Claim
32 words
A hybrid propulsion system as claimed in claim 1, wherein said first propulsion unit is an internal combustion engine and said second propulsion unit is an electric motor powered by electric batteries.
Claim 3
Dependent Claim
65 words
A hybrid propulsion system as claimed in claim 1 or 2, wherein said clutch is of automatic engagement type, the output shaft of said first propulsion unit being connected to a primary pulley of an infinitely variable speed transmission, a secondary pulley of said transmission being connected to said clutch, the driven element of which is connected to at least one wheel of said vehicle.
Claim 4
Dependent Claim
38 words
A hybrid propulsion system as claimed in claim 3, wherein the output shaft of said second propulsion unit is connected to said driven element of said automatic engagement clutch via a mechanism comprising a unidirectional motion transmission device.
Claim 5
Dependent Claim
53 words
A hybrid propulsion system as claimed in claim 3, wherein said automatic engagement clutch comprises two series of centrifugal weights, a first series of weights being connected to the secondary pulley of said infinitely variable transmission and the second series of weights being connected to the output shaft of said second propulsion unit.
Claim 6
Dependent Claim
25 words
A hybrid propulsion system as claimed in claim 1, comprising means for preventing simultaneous activation of said first propulsion unit and said second propulsion unit.
References Cited (Backward Citations)
GB993185A
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GB2013149A
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US4405029A
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US4469187A
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EP0082932A2
Cited
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