WO2013078490A1 - Drive arrangement for a generator, in particular of an electric vehicle - Google Patents

Drive arrangement for a generator, in particular of an electric vehicle Download PDF

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Publication number
WO2013078490A1
WO2013078490A1 PCT/AT2012/050174 AT2012050174W WO2013078490A1 WO 2013078490 A1 WO2013078490 A1 WO 2013078490A1 AT 2012050174 W AT2012050174 W AT 2012050174W WO 2013078490 A1 WO2013078490 A1 WO 2013078490A1
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WO
Grant status
Application
Patent type
Prior art keywords
crankshaft
piston
pistons
internal combustion
drive arrangement
Prior art date
Application number
PCT/AT2012/050174
Other languages
German (de)
French (fr)
Inventor
Franz Winkler
Roland Kirchberger
Helmut Eichlseder
Original Assignee
Technische Universität Graz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B41/00Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F02B41/02Engines with prolonged expansion
    • F02B41/06Engines with prolonged expansion in compound cylinders
    • F02B41/08Two-stroke compound engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • F02B63/042Rotating electric generators

Abstract

The invention relates to a drive arrangement for a generator, in particular of an electric vehicle, comprising a two-stroke internal combustion engine, the crankshaft output (13) of which can be coupled to the generator shaft. In order to minimise pollutant emissions, according to the invention the two-stroke internal combustion engine comprises at least one cylinder pair, the cylinders (1, 2) of which are connected to one another on the cylinder head side by a combustion chamber (6), wherein of the two pistons (3, 4) articulated via a respective connecting rod (11, 12) on the common crankshaft output (13), one piston (3) controls the inlet channels (8) and the other piston (4) controls the outlet channels (9), and the two pistons (3, 4) are articulated in a phase-shifted manner on the crankshaft output (13).

Description

Antriebsanordnunq for a generator, in particular a Elektrofahrzeuqs

technical field

The invention relates to a drive arrangement for a generator, in particular an electric vehicle, with a two-stroke internal combustion engine whose crankshaft output can be coupled to the generator shaft.

State of the art

In order to increase the range of electric vehicles equipped with traction batteries, it is known to provide the energy required for the operation of the electric motor also has a generator which is driven by means of an internal combustion engine. Due to the relatively simple structure is therefor two-stroke internal combustion engines to (DE 203 09 004 U1) offer, but have to be taken at the usual two-stroke internal combustion engines scavenging losses into account, which may adversely affect the pollutant content in the exhaust gas. The disadvantage of higher Brenn Stoff losses in mixture flushed motors can be countered by a direct injection of the fuel. By the temporal separation of the fuel supply of the air conditioner, the focal otherwise caused by the flushing can be largely avoided material losses. However, the scavenging losses from the air are retained, resulting in a very lean exhaust gas can be well treated in terms of carbon monoxide and hydrocarbons. However, a reduction of nitrogen oxides is hardly possible due to the oxygen content of the exhaust gases. In order to provide high-speed diesel engines with low weight, it is also known (DE 25 13 380 A1) to provide two mutually arranged parallel cylinder with a common combustion chamber and to connect the piston of this cylinder via connecting rods to a common crankshaft, which is perpendicular to plane of symmetry between the two cylinders is arranged. Since the connecting rods of the pistons are mounted on a common crank pin, is formed between the matching lower and upper dead centers of the piston to the piston, a different stroke characteristic. In addition, it is known (DE 1 451 934 A1) to connect two parallel cylinders together by a common combustion chamber, in order to achieve a dynamic balance the two pistons act on separate crank shafts which are coupled together via a gear pair. In addition, the connecting rods are articulated to one another connected by a rod. Such special constructions but the pollutant emissions from two-stroke internal combustion engines can not significantly influence.

Summary of the Invention

The invention is thus based on the object to design a two-cycle internal combustion engine for the generator drive, especially in a battery-powered electric vehicle, that the advantages of the electric drive can be utilized without increasing the emission of pollutants significantly by the use of a two-stroke internal combustion engine.

Starting from a drive arrangement of the kind mentioned above, the invention solves the stated object in that the two-stroke internal combustion engine having at least one pair of cylinders, the cylinder zy each other linder head side are connected by a combustion chamber, of the two via a respective connecting rod to the common crankshaft output articulated piston is a piston, the inlet channels and the other piston controls the exhaust channels, and that the two pistons are phase-displaced articulated on the crank shaft output.

The invention is based on the recognition that by the piston controlling the intake and exhaust ports in conventional two-stroke internal combustion engines is not possible independent adjustment of the control times for the intake and exhaust ducts. however, be used so-called double piston engines, which have a common combustion chamber interconnected cylinders, so can the piston of a cylinder, the inlet ducts and are controlled by the Kobeln of the other cylinder, the exhaust ports. therefore, it requires only a phase displacement of the two pistons to the control times for the intake and exhaust ports so pretending that a substantially stoichiometric combustion with the advantage can be ensured that in the waste gas no excess oxygen is present. But that the conditions exist to make an effective exhaust gas treatment not only in terms of carbon monoxide and hydrocarbon concentration, but also in terms of nitrogen oxide emissions, so that the operation of the two-stroke internal combustion engine is possible with a low environmental impact from harmful emissions. In the necessary phase displacement of the piston, however, is valid only for a narrow rpm range, but this is not a decisive role in the demand for a generator drive at a constant speed.

The phase displacement of the two pistons of the cylinder connected to one another via a derkopfseitigen combustion chamber cylinder can be constructionally achieved in a simple manner in that the connecting rods of the two pistons are hinged to arranged angularly offset crank pin of a common crankshaft the crankshaft power take-off. This includes generally made of a mutual rotational adjustment of the crankshaft journals for adaptation to different operating conditions. However, the crank drive comprises two a pair of gears drivingly connected parallel crankshafts to which the connecting rods of the two pistons are hinged angularly offset, the result is not only due to the counter-rotating crankshafts an advantageous mass balance, but also the possibility of the mutual rotational position of the crank pin of the adjust two crankshafts, if one of the two crankshafts is mounted in a rotationally adjustable relative to the associated gear him. Thus, with the resulting productive design intent optimal combustion conditions for different operating conditions can be set, whereby the emissions can be minimized for different operating states by appropriate treatment of exhaust gases, so that the benefits of electric drive regard to the emissions not by using a two-stroke internal combustion engine is to ensure an additional electrical power supply for the electric drive can be made to drive a generator naught.

Brief Description of Drawing

In the drawing, the subject invention is shown, for example. Show it

Fig. 1 is a two-stroke internal combustion engine according to the invention for driving a generator of an electric vehicle in a schematic axial section,

Fig. 2 shows the crankshaft output of this two-stroke internal combustion engine in a

Side view on a larger scale,

Fig. 3 is a FIG. 1 representation corresponding to a construction variant of a two-stroke internal combustion engine, and

Fig. 4 shows the crank shaft output of the two-stroke internal combustion engine of FIG. 3 in a simplified top view on a larger scale.

Mode for Carrying Out of the Invention

The illustrated in FIGS. 1 and 2 two-stroke internal combustion engine has two cylinders 1, 2 each with a piston 3, 4, wherein the arrangement is such that the two cylinders 1, 2 in the region of a cylinder head 5 via a combustion chamber 6 are connected to each other, the spark plug is assigned. 7 Of the two pistons 3, 4 a piston 3 controls the inlet channels 8 and the other piston 4, the outlet channels 9. The cylinder 1 having the inlet channels 8 is associated with an injector 10 for fuel.

The two pistons 3, 4 are made in each case via a dash-dotted lines connecting rod 1 1, 12 connected to a crankshaft output 13, according to the embodiment of FIGS. 1 and 2 from a common crankshaft 14. This crankshaft 14 has, for each of the two connecting rods 1 1, 12 a crank pin 15, 16, wherein the two crank pins 15, 16 against each other α offset by an angle along the dot-dash lines crankpin circulating circuit but arranged together between two crank webs 17 of the crankshaft 14 and are connected together. By the phase displacement α of the crank pins 15, 16 for the two pistons 3, 4, the outlet channels 4 in relation to the inlet channels 8 and the fuel supply which can be controlled temporally in such a way that a substantially stoichiometric combustion is established at a predetermined operating condition with low scavenging losses, a which can effectively take on both the carbon monoxide content, as well as the concentration of hydrocarbon and nitrogen oxide content influence is possible exhaust aftertreatment.

In contrast to FIGS. 1 and 2, the two-stroke internal combustion engine according to FIGS. 3 and 4, a crankshaft driven 13 with two parallel crankshafts 18 and 19 which are opposite drive-connected by means of a gear wheel pair 20, 21. The piston rods 1 1, 12 of the pistons 3, 4 are hinged to the crank pin 15, 16 of the cylinders 1 and 2 associated crankshafts 18, 19, how this can be seen directly from Fig. 3. The crank pins 15, 16 are in turn α phase offset at an angle to take over the pistons 3, 4 accordingly affect the timing of the intake and exhaust ports 8,. 9 As can be seen from the Fig. 4, one of the two gears 20, 21 rotatably connected to the associated crank 19 is connected, while the other gear 20 is supported rotatably adjustable on the crankshaft 18. a coupling means 22 which enables a rotational adjustment of the gear 20 relative to the crankshaft 18 and thus an adjustment of the phase angle α between the crank pins 15 and 16 of the crankshafts 18, 19 serves for the rotationally fixed connection of the gear 20 to the crankshaft 18th Such known for example from a camshaft adjustment coupling devices 22 can be hydraulically adjusted during engine operation, for example, so that an adjustment of the control times of the intake and exhaust ports 8, 9 is possible during operation to secure an adaptation to different operating conditions.

Due to this adjustment of the control times of the intake and exhaust ports 8, 9 to different operating conditions the drive wheels of the electric vehicle for limited operating conditions using the two-stroke internal combustion engine can be driven when the drive wheels are coupled to the generator shaft, so that a rigid mechanical drive relationship between two-stroke internal combustion engine results in the driving wheels and the driven shaft of the electric vehicle.

Particularly advantageous constructional conditions are obtained for two-stroke internal combustion engines, when two pairs of cylinders 1, 2 are lined up ready, because a more compact engine block with four at least substantially arranged in a square or rectangular cylinders is obtained in this case.

Claims

claims
1 . Drive arrangement for a generator, particularly an electric car emits, with a two-stroke internal combustion engine whose crankshaft drive (13) is coupled to the generator shaft, characterized in that the two-stroke internal combustion engine having a pair of cylinders at least the cylinder (1, 2) the cylinder head side to each other by a combustion chamber are connected (6), hinged by the two via a respective connecting rod (1 1, 12) to the common crankshaft output (13) piston (3, 4), a piston (3), the inlet channels (8) and the other piston (4) controls the outlet (9), and that the two pistons (3, 4) out of phase at the output crankshaft (13) are hinged.
2. A drive arrangement according to claim 1, characterized in that the connecting rods (1 1, 12) of the two pistons (3, 4) arranged angularly offset crank pins (15, 16) a common crankshaft (14) of the crankshaft power take-off (13) are hinged.
3. A drive arrangement according to claim 1, characterized in that the crankshaft output (13) two through a pair of gears drivingly connected parallel crankshafts (20, 21) (18, 19) on which the connecting rods (1 1, 12) (of the two pistons 3, 4) are hinged angularly offset.
4. A drive arrangement according to claim 3, characterized in that one of the two crankshafts (18, 19) relative to the associated him gear (20) of the gear pair (20, 21) is rotatably adjustable.
PCT/AT2012/050174 2011-11-30 2012-11-05 Drive arrangement for a generator, in particular of an electric vehicle WO2013078490A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT17722011A AT511600B1 (en) 2011-11-30 2011-11-30 Drive arrangement for a generator, in particular an electric vehicle
ATA1772/2011 2011-11-30

Publications (1)

Publication Number Publication Date
WO2013078490A1 true true WO2013078490A1 (en) 2013-06-06

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457322A (en) * 1920-10-05 1923-06-05 Sproule Albert Howell Internal-combustion engine
DE614347C (en) * 1933-01-24 1935-06-06 Edwin Enzian Double piston engine
FR1009138A (en) * 1950-01-26 1952-05-26 Device for changing the rate of compression during operation in a 2-stroke engine or petrol in a diesel engine injection pump without
DE1451934A1 (en) 1965-02-11 1969-01-30 Mini Ind Constructillor Engine in constant dynamic equilibrium
US3961607A (en) * 1972-05-12 1976-06-08 John Henry Brems Internal combustion engine
DE2513380A1 (en) 1975-03-26 1976-10-07 Geurt Pleyzier Low weight oil engine of short stroke - has light alloy housing with one injector for two cylinders
US4876992A (en) * 1988-08-19 1989-10-31 Standard Oil Company Crankshaft phasing mechanism
WO1994021905A1 (en) * 1993-03-19 1994-09-29 Avermaete Gilbert Improvements to compression or spark ignition four-stroke internal combustion engines having a variable compression ratio enabling high supercharging pressure levels
DE20309004U1 (en) 2003-06-10 2004-02-05 DÖRING, Manfred Unit for drive tasks and current generation has high speed two-stroke diesel engine with one or more crank guides and charging pump between each crank drive separating wall bearing and each piston floor
US20090107139A1 (en) * 2007-10-30 2009-04-30 Berger Alvin H Variable compression ratio dual crankshaft engine
WO2011129714A1 (en) * 2010-04-15 2011-10-20 Gabdullin Rivener Musavirovich Method for operating an internal combustion engine

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1457322A (en) * 1920-10-05 1923-06-05 Sproule Albert Howell Internal-combustion engine
DE614347C (en) * 1933-01-24 1935-06-06 Edwin Enzian Double piston engine
FR1009138A (en) * 1950-01-26 1952-05-26 Device for changing the rate of compression during operation in a 2-stroke engine or petrol in a diesel engine injection pump without
DE1451934A1 (en) 1965-02-11 1969-01-30 Mini Ind Constructillor Engine in constant dynamic equilibrium
US3961607A (en) * 1972-05-12 1976-06-08 John Henry Brems Internal combustion engine
DE2513380A1 (en) 1975-03-26 1976-10-07 Geurt Pleyzier Low weight oil engine of short stroke - has light alloy housing with one injector for two cylinders
US4876992A (en) * 1988-08-19 1989-10-31 Standard Oil Company Crankshaft phasing mechanism
WO1994021905A1 (en) * 1993-03-19 1994-09-29 Avermaete Gilbert Improvements to compression or spark ignition four-stroke internal combustion engines having a variable compression ratio enabling high supercharging pressure levels
DE20309004U1 (en) 2003-06-10 2004-02-05 DÖRING, Manfred Unit for drive tasks and current generation has high speed two-stroke diesel engine with one or more crank guides and charging pump between each crank drive separating wall bearing and each piston floor
US20090107139A1 (en) * 2007-10-30 2009-04-30 Berger Alvin H Variable compression ratio dual crankshaft engine
WO2011129714A1 (en) * 2010-04-15 2011-10-20 Gabdullin Rivener Musavirovich Method for operating an internal combustion engine

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