EP0345366A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Eight cycle or diesel type internal combustion engine
Assignee: Individual
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Filing: 1988-06-08
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Granted: —
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Expires: 2008-06-08
Abstract
Abstract Eight cycle or diesel type internal combustion carburation engine having the capacity of automatically varying the compression ratio in order to increase engine efficiency, without varying the amount of fuel consumed, wherein the axis (B) of the crankshaft (29) is carried by supports (30, 41) rotating around an axis (A), and said axis (A) is staggered with respect to the axis (B). The compression ratio will undergo a cyclic increase at each engine revolution so that, when the piston (12) reaches the top dead point, the resulting ratio will be higher than that achieved by a traditional engine.
Inventors
- 👤 Alfredo Buffoli
- 👤 Renzo Buffoli
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 10:39
CPC Classifications
F; F02; F02D; F02D15/00; F02D15/04; F02B; F02B75/00; F02B75/04; F02B75/047; F02B3/00; F02B3/06; F02B75/02; F02B75/021
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
1) Eight cycle or Diesel type internal combustion engine which allows the automatic and controlled variation of the compression ratio, comprising: at least a piston movable within a compression chamber fed by a fuel mixture and connected, through a connecting rod, to a crankshaft rotated by a drive shaft; at least one fuel intake valve and at least one valve for the expulsion of gases produced in the combustion and explosion chamber of the cylinder, said valves being driven by a shaft with at least one cam, characterized in that the axis (B) of the crankshaft (29) is carried by supports (30, 41) rotating around an axis (A) in order to produce a corresponding movement of the crankshaft (29), the axis (A) being staggered with respect to the axis (B), thereby the rotation causes an eccentric rotation of crankshaft (29), in relation to the connecting road (13), such eccentricity modifying the piston (12) stroke, so that the piston can reach the top dead point near the bottom surface of the cylinder head (3); the above being programmable through an electronic control system installed on board of the motor vehicle, which provides for varying the above-mentioned drive shaft or camshaft (B) movement with respect to the connecting road (13).
Claim 2
Dependent Claim
208 words
1) Eight cycle or Diesel type internal combustion engine which allows the automatic and controlled variation of the compression ratio, comprising: at least a piston movable within a compression chamber fed by a fuel mixture and connected, through a connecting rod, to a crankshaft rotated by a drive shaft; at least one fuel intake valve and at least one valve for the expulsion of gases produced in the combustion and explosion chamber of the cylinder, said valves being driven by a shaft with at least one cam, characterized in that the axis (B) of the crankshaft (29) is carried by supports (30, 41) rotating around an axis (A) in order to produce a corresponding movement of the crankshaft (29), the axis (A) being staggered with respect to the axis (B), thereby the rotation causes an eccentric rotation of crankshaft (29), in relation to the connecting road (13), such eccentricity modifying the piston (12) stroke, so that the piston can reach the top dead point near the bottom surface of the cylinder head (3); the above being programmable through an electronic control system installed on board of the motor vehicle, which provides for varying the above-mentioned drive shaft or camshaft (B) movement with respect to the connecting road (13).
Claim 3
Dependent Claim
83 words
2) Internal combustion engine according to claim 1, wherein the supports (30) (41) are connected to a shaped plate (16) on which the clutch casing (20) is mounted; the clutch casing rotating around the axis (A) of the supports (30) and (41) and the shaped plate (16) being provided with at least one toothed part (16a) engaging with a gear (55) the rotation of which is programmed and modified by proximity switches (17), (18), (19) cooperating with corresponding position detector (58), (59), (60).
Claim 4
Dependent Claim
118 words
3) Internal combustion engine according to claim 1 or 2, characterized in that by rotating the supports (30, 41) of the drive shaft (B) in one direction, the drive axis (B) rises upward so that the top of the piston (12), when this latter reaches the top dead point, is near the bottom surface of the cylinder head (3), thereby causing an increase in the compression ratio (Rc); while, when the supports (30, 41) of the drive shaft (B) are rotated in the opposite direction, the top of the piston (12), when it reaches top dead point, will be further away from the bottom surface of the cylinder head (3), thereby causing the compression ratio (Rc) to decrease.
Claim 5
Dependent Claim
37 words
4) Internal combustion engine according to any of the preceding claims, characterized by the fact that a direct current motor (56), by an undirectional reducer (69), drives the gear (55) which induces rotation of the plate (16).
References Cited (Backward Citations)
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