Patent EP0145546B1 successfully refreshed from Google Patents.
EP0145546B1
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Hydraulic distributor for a servo mechanism with reaction on the input member
Assignee: AlliedSignal Automotive Espana SA
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Filing: 1984-11-07
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Granted: 1988-01-20
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Expires: 2004-11-07
Abstract
No abstract record available.
Inventors
- 👤 Juan Simon Bacardit
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:27
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/08; B62D5/083; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638; Y10T137/86646; Y10T137/86662
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
264 words
Hydraulic distributor for servomechanism, more particularly for the servo-steering of a motor vehicle, incorporating a primary component (12) joined to an input actuating component (11), and a secondary component (15) which are associated through the intermediary of a coupling with dead travel allowing limited relative displacement between these primary and secondary components on each side of a central position, these primary and secondary components mutually defining at least one first pair of parallel fluid circuits (10, 10'), between a source of pressure (8) and a discharge (9), each incorporating at least first (1, 1'), second (2, 2') and third (3, 3') restrictions arranged in series, between the source of pressure (8) and the discharge (9), the second (2, 2') and third (3, 3') restriction being capable of being modulated, the first (1, 1') second (2, 2') and third (3, 3') restriction being brought into operation during the said relative displacement between these two components (12, 15) so as to control a hydraulic assistance device (V) incorporating two opposing chambers (V ll V 2 ) joined, respectively, to a circuit corresponding to the first pair of circuits (10, 10') between the second (2, 2') and third (3, 3') restrictions of this circuit, characterized in that each chamber (V l , V 2 ) of the assistance device is joined to the corresponding fluid circuit (10, 10') only between the second (2, 2') and third (3, 3') restrictions of this circuit, the first restrictions (1, 1') introducing a restriction which is substantially constant, the third restrictions (3, 3') introducing a progressive restriction which is substantially linear.
Claim 2
Dependent Claim
264 words
Hydraulic distributor for servomechanism, more particularly for the servo-steering of a motor vehicle, incorporating a primary component (12) joined to an input actuating component (11), and a secondary component (15) which are associated through the intermediary of a coupling with dead travel allowing limited relative displacement between these primary and secondary components on each side of a central position, these primary and secondary components mutually defining at least one first pair of parallel fluid circuits (10, 10'), between a source of pressure (8) and a discharge (9), each incorporating at least first (1, 1'), second (2, 2') and third (3, 3') restrictions arranged in series, between the source of pressure (8) and the discharge (9), the second (2, 2') and third (3, 3') restriction being capable of being modulated, the first (1, 1') second (2, 2') and third (3, 3') restriction being brought into operation during the said relative displacement between these two components (12, 15) so as to control a hydraulic assistance device (V) incorporating two opposing chambers (V ll V 2 ) joined, respectively, to a circuit corresponding to the first pair of circuits (10, 10') between the second (2, 2') and third (3, 3') restrictions of this circuit, characterized in that each chamber (V l , V 2 ) of the assistance device is joined to the corresponding fluid circuit (10, 10') only between the second (2, 2') and third (3, 3') restrictions of this circuit, the first restrictions (1, 1') introducing a restriction which is substantially constant, the third restrictions (3, 3') introducing a progressive restriction which is substantially linear.
Claim 3
Dependent Claim
57 words
Hydraulic distributor according to Claim 1, characterized in that each second restriction (2, 2') introduces a restriction which is at first substantially constant (60) and equal to that of the first restriction (1, 1') of the other circuit, simultaneously with the latter, then progressive (61) substantially simultaneously with the third restriction (3, 3') of the other circuit.
Claim 4
Dependent Claim
86 words
Hydraulic distributor according to Claim 1 or Claim 2, characterized in that it incorporates a reaction device with opposed chambers (R l , R 2 ) coupled to the primary component (12) and actuated by reaction pressures (P r ) supplied from the pressure source (8) through fourth restrictions (4, 4') arranged, respectively, in a second pair of parallel circuits (20, 20') defined by the primary (12) and secondary (15) components, and brought into operation first during the relative displacement between these primary and secondary components.
Claim 5
Dependent Claim
87 words
Hydraulic distributor according to one of the preceding claims, characterized in that the primary component (12) is a flat star-shaped rotor mounted so as to rotate in a complementary disc- shaped housing (14) of a cylindrical stator (15) forming the secondary component, the said restrictions (1, l' ; 2, 2' ; 3, 3' ; 4, 4') being defined by cooperating edges, which extend substantially radially, from openings (30 ; 40 ; 43 ; 41) formed in the axially facing surfaces of the rotor and of the stator.
Claim 6
Dependent Claim
50 words
Hydraulic distributor according to Claim 3 or Claim 4, characterized in that the reaction chambers (R i , R 2 ) are formed by portions which are offset radially outwards of the said housing (14) of the stator (15) on each side of each arm (13) of the star-shaped rotor.
Claim 7
Dependent Claim
40 words
Hydraulic distributor according to Claim 5, characterized in that the first (1, 1') second (2, 2') and third (3, 3') restrictions of the first pair of circuits (10, 10') are formed in the arms (13) of the star-shaped rotor (12).
Claim 8
Dependent Claim
35 words
Hydraulic distributor according to Claim 6, characterized in that the fourth restrictions (4, 4') of the second pair of circuits (20, 20') are formed in the base of the arms of the star-shaped rotor (12).
Claim 9
Dependent Claim
38 words
Hydraulic distributor according to Claim 7, characterized in that the circuits of the second pair of circuits (20, 20') each incorporate a fifth restriction (5, 5') situated between the associated fourth restriction (4, 4') and the discharge (9).
Claim 10
Dependent Claim
128 words
Hydraulic distributor according to Claim 7 or Claim 8, characterized in that the first restrictions (1, 1') are formed between a supply opening (30) of the stator (15) and two intermediate closed openings (40) of the rotor (12) on each side of the supply opening (30), the second restrictions (2, 2') being formed between each of the said intermediate openings (40) of the rotor and a corresponding distribution opening (43) of the stator (15), joined to a chamber (V 1 , V 2 ) of the assistance device (V), the third restrictions (3, 3') being formed between each of these distribution openings (43) of the stator and a return opening (41) of the rotor extending radially inwards and opening into the central return passage (42) of the distributor.
Claim 11
Dependent Claim
95 words
Hydraulic distributor according to Claim 8 and Claim 9, characterized in that the fourth restrictions (4, 4') are formed between a closed inner opening (50) of the rotor, offset radially inwards from the intermediate openings (40) of the rotor, and two reaction openings (r 1 , r 2 ) of the stator situated on each side of the inner opening (50) of the rotor, communicating permanently with the associated reaction chambers (R 1 , R 2 ) and selectively with the corresponding return openings (41) of the rotor via the said fifth restrictions (5, 5').
Claim 12
Dependent Claim
38 words
Hydraulic distributor according to any one of Claims 3 to 10, characterized in that it incorporates a restriction capable of being modulated externally (6) between the source of pressure (8) and the second pair of circuits (20, 20').
Claim 13
Dependent Claim
38 words
Hydraulic distributor according to Claim 11, characterized in that it incorporates a valve for limiting the reaction pressure (7) between the restriction which is capable of being modulated externally (6) and the second pair of circuits (20, 20').
Claim 14
Dependent Claim
31 words
Hydraulic distributor according to Claim 12, linked to one of Claims 10 and 11, characterized in that the valve for limiting the reaction pressure (7) is built into the stator (15).
Claim 15
Dependent Claim
52 words
Hydraulic distributor according to Claim 13, characterized in that the pressure limiting valve (7) incorporates a ring forming. a valve (83) pushed axially by elastic washers (84) and situated facing the inner openings (50) of the rotor (12) and the reaction openings (r 1 , r 2 ) of the stator (15).
References Cited (Backward Citations)
No citation records indexed.
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