US871602A - Mechanism for changing a four-stroke cycle-motor into a two-stroke cycle-motor. - Google Patents

Mechanism for changing a four-stroke cycle-motor into a two-stroke cycle-motor. Download PDF

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Publication number
US871602A
US871602A US30816306A US1906308163A US871602A US 871602 A US871602 A US 871602A US 30816306 A US30816306 A US 30816306A US 1906308163 A US1906308163 A US 1906308163A US 871602 A US871602 A US 871602A
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United States
Prior art keywords
motor
stroke cycle
lever
changing
rod
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Expired - Lifetime
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US30816306A
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Samuel Loeffler
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
    • F02B69/06—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different cycles, e.g. convertible from two-stroke to four stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/026—Gear drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L2001/054—Camshafts in cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • My invention relates to a mechanism for changing a four-stroke cycle motor into a two-stroke cycle motor. 7
  • the mechanism is particularly adapted for starting motors used for instance with automobile cars which, as it will be known, are working in the four-stroke cycle for starting and then changed into a two-stroke cycle explosion motor.
  • a valve of the motor as, for example, the air valve
  • w1th means for shifting the arts to change the engine from a fourstro re cycle to a two-stroke cycle, at will.
  • Figure 1 is an elevation of a motor showing a valve equipped'with mechanism adapted to the purpose described.
  • Fig. 2 is a view of Fig. 1 from the left, and
  • Fig. 3 is a detail view showingthevalve shifting mechanism in elevation.
  • the shaft a which is driven at onehalf the speed of the main shaft through the reducing gears shown in Figs. 1 and 2, is provided with a cam having two projections b and 0 arranged in different planes and working on a rod d, which operates the valve of the engine as shown in Fig. 2.
  • a lever f Between the cam projection b and a roller fixed at the lower end of the rod d is a lever f, which is pivoted on an axis 6 and rests on the surface of the cam, in the path of movement of the projection b.
  • a second lever g is arranged under the rod (1 in the plane of the cam projection c and supports also the rod (1.
  • the lever g is pivotally connected at h with the outer end of an arm which can be rocked round the axis i.
  • the lever g is provided with a prolongation 7: by which the lever is held against the axis e so that it can not be depressed by the rod (Z under the position shown in the drawing. If this lever g by rocking the arm 7' is shifted in the direction of the arrows shown in the drawing it will come into the way of the rotating cam projection c.

Description

N No. 871,602. I
. s. LOFFLER.
PATENTED NOV. 19, 1907.
MECHANISM FOR CHANGING A FOUR STROKE CYCLE MOTOR INTO A TWO STROKE CYCLE MOTOR. APPLICATION nun MAR. as. 1906.
\A ITN ESSES UNITED SAMUEL LOFFLER, OF WITKOWITZ, AUSTRIA-HUNGARY.
MECHANISM FOR CHANGING- A FOUR-STROKE CYCLE-MOTOR INTO A TWO-STROKE CYCLE-MOTOR.
No..s71,eo2.
T0 allwhom itmay concern:
Be it known that I, SAMUEL LoFFLnR, engineer, a subject of the Austrian Emperor, residing at 60 Mariengasse, l/Vitkowitz, Moravia, Austria-Hungary, have invented certain new and useful Improvements in a Mechanism for Changing a Four-Stroke Cycle-Motor into a Two-Stroke Cycle-Motor; and I do hereby declare the following to be a full, clear, and
exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.
My invention relates to a mechanism for changing a four-stroke cycle motor into a two-stroke cycle motor. 7
The mechanism is particularly adapted for starting motors used for instance with automobile cars which, as it will be known, are working in the four-stroke cycle for starting and then changed into a two-stroke cycle explosion motor.
I have shown in the accompanying drawings a mechanism by which a valve of the motor, as, for example, the air valve, may be opened on each stroke of the engine, thus givin the'engine a two-stroke cycle, or it may e opened on each alternate stroke of the engine, thus givin the engine a fourstroke cycle, together w1th means for shifting the arts to change the engine from a fourstro re cycle to a two-stroke cycle, at will.
In the accompanying drawings, Figure 1 is an elevation of a motor showing a valve equipped'with mechanism adapted to the purpose described. Fig. 2 is a view of Fig. 1 from the left, and Fig. 3 is a detail view showingthevalve shifting mechanism in elevation.
The shaft a which is driven at onehalf the speed of the main shaft through the reducing gears shown in Figs. 1 and 2, is provided with a cam having two projections b and 0 arranged in different planes and working on a rod d, which operates the valve of the engine as shown in Fig. 2. Between the cam projection b and a roller fixed at the lower end of the rod d is a lever f, which is pivoted on an axis 6 and rests on the surface of the cam, in the path of movement of the projection b. Each rotation of the cam, there- Specification of Letters Patent.
Application filed March 26,1906. Serial No. 308,163-
Patented Nov. 19, 1907.
fore, will lift the lever f and the rod (1 supported by the said lever. Thus the motor will work as a four-strokecycle engine.
Independently of the lever f a second lever g is arranged under the rod (1 in the plane of the cam projection c and supports also the rod (1. The lever g is pivotally connected at h with the outer end of an arm which can be rocked round the axis i. The lever g is provided with a prolongation 7: by which the lever is held against the axis e so that it can not be depressed by the rod (Z under the position shown in the drawing. If this lever g by rocking the arm 7' is shifted in the direction of the arrows shown in the drawing it will come into the way of the rotating cam projection c. It is obvious, that in such a position of the parts the rod (1 is lifted not only when the cam projection b strikes the lever f but also if the cam projection c strikes the lever g, that is to say two times in each revolution of the shaft a. Thus the motor works as a two-stroke cycle engine. As it will be seen the part producing the working of the motor in a two-stroke cycle is independent of the part causing the motor to work as a four-stroke cycle engine. The changing of the mode of working can be effected by simply shifting a lever. The mechanism is simple and cheap in construction and easy to be operated.
Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I declare that what I claim is 1. In a mechanism for changing a fourstroke cycle motor into a two-stroke cycle motor the combination with a rod adapted to operate a valve of the machine, of two cam projections arranged in different planes, a lever arranged between the said rod and one of the cam projections, a second lever arranged in the plane of the other cam projection and means for shifting this second lever between the last mentioned cam projection and the said rod, substantially as described and for the purpose set forth.
2. In a mechanism for changing a fourstroke cycle motor into a two-stroke cycle motor the combination with a rod adapted to operate a valve of the machine, of two said rod, substantially as described and for 10 earn projections arranged in different planes, the purpose set forth.
a lever arranged between the said rod and In testimony whereof I have affiXed my one of the cam projections, a second lever signature, in presence of two witnesses.
arranged in the plane of the other cam pro- 1ect1on andv having a prolongation, with SAMUEL LOFFLER' which it is held against a fixed part, and of Witnesses: means for shifting this second lever between OHYsIR WILLKAU, the last mentioned cam projection and the AnoLF SoHwAoHULEN.
US30816306A 1906-03-26 1906-03-26 Mechanism for changing a four-stroke cycle-motor into a two-stroke cycle-motor. Expired - Lifetime US871602A (en)

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Application Number Priority Date Filing Date Title
US30816306A US871602A (en) 1906-03-26 1906-03-26 Mechanism for changing a four-stroke cycle-motor into a two-stroke cycle-motor.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30816306A US871602A (en) 1906-03-26 1906-03-26 Mechanism for changing a four-stroke cycle-motor into a two-stroke cycle-motor.

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5158044A (en) * 1990-09-10 1992-10-27 Isuzu Ceramics Research Institute Co., Ltd. Engine selectively operable in two- and four-cycle modes
US20050205019A1 (en) * 2004-03-17 2005-09-22 Reinhard Burk Two-stroke and four-stroke switching mechanism
DE102007002802A1 (en) * 2007-01-18 2008-07-24 Audi Ag Valve train changing method for internal combustion engine, involves shifting cam carrier between axial position, which is assigned to two stroke operation, and another axial position, which is assigned to four-stroke operation
WO2012113424A1 (en) * 2011-02-24 2012-08-30 Daimler Ag Internal combustion engine valve drive device
WO2015052196A1 (en) * 2013-10-09 2015-04-16 Eaton Srl A valve train assembly
EP3184779A1 (en) * 2015-12-24 2017-06-28 C.R.F. Società Consortile per Azioni System for variable actuation of a valve of an internal-combustion engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5158044A (en) * 1990-09-10 1992-10-27 Isuzu Ceramics Research Institute Co., Ltd. Engine selectively operable in two- and four-cycle modes
US20050205019A1 (en) * 2004-03-17 2005-09-22 Reinhard Burk Two-stroke and four-stroke switching mechanism
US7036465B2 (en) 2004-03-17 2006-05-02 Ricardo, Inc. Two-stroke and four-stroke switching mechanism
DE102007002802A1 (en) * 2007-01-18 2008-07-24 Audi Ag Valve train changing method for internal combustion engine, involves shifting cam carrier between axial position, which is assigned to two stroke operation, and another axial position, which is assigned to four-stroke operation
DE102007002802B4 (en) * 2007-01-18 2009-04-09 Audi Ag Method for switching a valve train of an internal combustion engine between a two-stroke and a four-stroke operation and valve train
WO2012113424A1 (en) * 2011-02-24 2012-08-30 Daimler Ag Internal combustion engine valve drive device
WO2015052196A1 (en) * 2013-10-09 2015-04-16 Eaton Srl A valve train assembly
EP3184779A1 (en) * 2015-12-24 2017-06-28 C.R.F. Società Consortile per Azioni System for variable actuation of a valve of an internal-combustion engine
US10487704B2 (en) 2015-12-24 2019-11-26 C.R.F. Societa Consortile Per Azioni System for variable actuation of a valve of an internal-combustion engine

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