US5355849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic variator valve overlap or timing and valve section
Assignee: Individual
•
Filing: 1993-07-26
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Granted: 1994-10-18
•
Expires: 2013-07-26
Abstract
Abstract An automatic variator for use in an internal combustion engine and other engines which use valve-type distribution systems, to operate a twin set of double-effect distribution sequential valve shafts for the purpose of regulating the valve overlap or timing and the valve opening section or to operate a double overhead camshaft with poppet valves for the purpose of regulating valve overlap or timing while the engine is running. A motor reducer advances a spindle against the valve shaft with a grooved screw at one end of the same, causing the shaft to turn and move, thereby varying the valve overlap or the valve section and valve overlap.
Inventors
- 👤 Miljenko Schiattino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:04
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/34; F01L1/344; F01L13/00; F01L13/0015; F01L7/00; F01L7/02; F01L7/026; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/18; F02F; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
An automatic variator assembly for varying the valve timing in a valvular distribution system in an internal combustion engine which includes an engine block, a cylinder formed in the engine block, the cylinder having a cylinder head, a piston slidable within the cylinder, and a combustion chamber bounded by the cylinder and the piston, and a distribution system consisting of two camshafts with valves located in the cylinder head, the variator assembly comprising: an automatic mechanism controlled by a microprocessor; a spindle for moving one of said camshafts; a motor activated by said automatic mechanism which turns a number of predetermined turns or steps, causing an end of said spindle to advance and push the camshaft forward or pull it back; an axle box; and a multiple entrance grooved screw etched in at one end of said camshaft, turning inside said axle box, in such a way that a differential and controlled turn is produced in said camshaft when said spindle moves said camshaft, causing a rotation of said camshaft and longitudinal displacement of said camshaft, thereby varying the valve timing while the engine is turning.
Claim 2
Dependent Claim
186 words
An automatic variator assembly for varying the valve timing in a valvular distribution system in an internal combustion engine which includes an engine block, a cylinder formed in the engine block, the cylinder having a cylinder head, a piston slidable within the cylinder, and a combustion chamber bounded by the cylinder and the piston, and a distribution system consisting of two camshafts with valves located in the cylinder head, the variator assembly comprising: an automatic mechanism controlled by a microprocessor; a spindle for moving one of said camshafts; a motor activated by said automatic mechanism which turns a number of predetermined turns or steps, causing an end of said spindle to advance and push the camshaft forward or pull it back; an axle box; and a multiple entrance grooved screw etched in at one end of said camshaft, turning inside said axle box, in such a way that a differential and controlled turn is produced in said camshaft when said spindle moves said camshaft, causing a rotation of said camshaft and longitudinal displacement of said camshaft, thereby varying the valve timing while the engine is turning.
Claim 3
Dependent Claim
22 words
The variator assembly according to claim 1, wherein said automatic mechanism is activated by a signal from a tachometer and gas analyzer.
Claim 4
Dependent Claim
27 words
The variator assembly according to claim 1, wherein said axle box is fixed relative to said spindle and said grooved screw is screwed into said axle box.
Claim 5
Dependent Claim
27 words
The variator assembly according to claim 1, wherein said motor is a motor reducer having a worm gear and said spindle is screwed into said worm gear.
Claim 6
Dependent Claim
14 words
The variator assembly according to claim 1, wherein said motor is a step motor.
Claim 7
Dependent Claim
14 words
The variator assembly according to claim 1, wherein said motor is a servo motor.
Claim 8
Dependent Claim
208 words
An automatic variator assembly for varying the valve timing in a valvular distribution system in an internal combustion engine which includes an engine block, a cylinder formed in the engine block, the cylinder having a cylinder head, a piston slidable within the cylinder, and a combustion chamber bounded by the cylinder and the piston, and a distribution system consisting of two camshafts with valves located in the cylinder head, the variator assembly comprising: an automatic mechanism controlled by a microprocessor which is activated by a signal received from a tachometer and gas analyzer; a spindle for moving one of said camshafts; a motor reducer or a step motor or a servo motor activated by said automatic mechanism which turns a number of predetermined turns or steps, causing an end of said spindle to advance and push the camshaft forward or pull it back; a threaded sleeve; and a multiple entrance grooved screw etched in at one end of said camshaft, turning inside said threaded sleeve, in such a way that a differential and controlled turn is produced in said camshaft when said spindle moves said camshaft, causing a rotation of said camshaft and longitudinal displacement of said camshaft, thereby varying the valve timing while the engine is turning.
Claim 9
Dependent Claim
208 words
An automatic variator assembly for varying the valve timing in a valvular distribution system in an internal combustion engine which includes an engine block, a cylinder formed in the engine block, the cylinder having a cylinder head, a piston slidable within the cylinder, and a combustion chamber bounded by the cylinder and the piston, and a distribution system consisting of two camshafts with valves located in the cylinder head, the variator assembly comprising: an automatic mechanism controlled by a microprocessor which is activated by a signal received from a tachometer and gas analyzer; a spindle for moving one of said camshafts; a motor reducer or a step motor or a servo motor activated by said automatic mechanism which turns a number of predetermined turns or steps, causing an end of said spindle to advance and push the camshaft forward or pull it back; a threaded sleeve; and a multiple entrance grooved screw etched in at one end of said camshaft, turning inside said threaded sleeve, in such a way that a differential and controlled turn is produced in said camshaft when said spindle moves said camshaft, causing a rotation of said camshaft and longitudinal displacement of said camshaft, thereby varying the valve timing while the engine is turning.
Claim 10
Dependent Claim
27 words
The variator assembly according to claim 7, wherein said threaded sleeve is fixed relative to said spindle and said grooved screw is screwed into said threaded sleeve.
Claim 11
Dependent Claim
24 words
The variator assembly according to claim 7, wherein said motor reducer has a worm gear and said spindle is screwed into said worm gear.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |