20:
178:
411:
problem of sealing, his study of previous designs, and his particular combination of knowledge of materials, machining skills, experience with engines, perseverance and realistic expectations. No new or only recently available materials were involved. Full details of the development of the car and engine appear in the book "Ralph Watson
Special Engineer," first published 2004, ISBN O-476-01371-2 and available free and easily searchable, on the internet as of 2020. The car is currently owned by Ray Ferner.
419:
256:
267:
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parallel twin unit. This unit is still in development phase at the time of writing but is significant as it has the potential to run much higher compression ratios than even other rotary valve engines due to a significant but undisclosed new cooling method of the combustion chamber and the ability to
307:
The rotary valve combustion engine possesses several significant advantages over the conventional assemblies, including significantly higher compression ratios and rpm, meaning more power, a much more compact and light-weight cylinder head, and reduced complexity, meaning higher reliability and lower
281:
414:
Disadvantages of rotary valves in the past have come from high friction or sealing performance. For over 100 years inventors have attempted to create a sealing system that can withstand the high temperatures of combustion and the related thermal expansion of the various seals and rotary valves. This
430:
has created a compliant rotary valve sealing system that solves the friction and sealing problems of previous designs. They have built ten prototype engines from a 5.3L V-8 to a handheld 28cc four stroke. VAZTEC has also built a successful Diesel engine that contained the high compression pressures
197:
A rotary valve in the pharmaceutical, chemical and food industry is used to dose and feed solid bulk products within the processes. Valves are also commonly used in construction, plastics, recycling, agriculture and forestry, or wherever material needs to be safely and efficiently conveyed from one
190:
Rotary valves for industrial manufacturing are often used in bulk material handling, dust collection or pneumatic conveying systems, depending on the application. The valve is used to regulate the flow of a product or material by maintaining a consistent flow rate suited to the process. Controlling
285:
284:
280:
279:
415:
valve expansion causes misalignment in the valve-to-seal interface as an engine moves from room temperature to full operating temperature. If the seals are pressed against the valve with higher pressure to accommodate this expansion, high friction and power loss occurs, plus high rates of wear.
372:
gear is too heavy, large in size and too complex to time and design properly. Rotary valves could allow for a more compact and lightweight cylinder head design. They rotate at half engine speed (or one quarter) and lack the inertia forces of reciprocating valve mechanisms. This allows for higher
410:
A proven completely successful automotive rotary valve engine has been built by the late Ralph Ogden Watson of
Auckland New Zealand, during 1989. The car has covered many trouble free miles from that date and remains in use. Success was achieved as a result of Watson's academic approach to the
201:
An airlock-type rotary valve receives and dispenses material from two chambers with different pressure levels. They seal air flow between the valve’s inlet and outlet to maintain a consistent pressure differential, which promotes efficient material flow. The valve’s pressurized chamber prevents
286:
393:, which had greater torque at both low(17% increase) and high (9% increase) engine speeds, and also produced more brake horsepower up to around 30% more at functional engine speeds. The engine was also considerably smaller and lighter, as the cylinder head assembly was not as large.
283:
396:
A company in the UK called Roton Engine
Developments made some progress in 2005 with a two-rotor (one for inlet and one for exhaust) single-cylinder Husaberg motorcycle engine. They filed patents and got an example running in 2006, but were backed by
388:
Bishop
Innovations' patent for the rotary valve engine was bought out by BRV Pty Ltd, owned by Tony Wallis, one of the valves original designers. BRV has constructed several functional motors using the rotary valve technology, such as a
191:
the flow of material helps to prevent issues such as jamming, material leakage and damage to the valve itself. Typical applications are for feeding a weighed hopper or for feeding a mill that can be clogged by the product.
401:
which subsequently went bust, leaving Roton without enough funds to continue. The designs surfaced some years later in
Australia with Engine Developments Australia Pty Ltd. A prototype casting was produced in 2013 on a
341:
system. This particular design is four-stroke, with the rotary valves operated by overhead shafts in lieu of overhead camshafts (i.e. in line with a bank of cylinders). The first sale of such an engine was part of a
23:
A rotary valve in default (A) and engaged (B) positions. 1. input airflow; 2. output airflow; 3. valve tubing; 4. valve casing; 5. internal rotor; 6. valve ports, or "knuckles"; 7. rotor spindle.
282:
194:
Valves are part of the material exchange process and work in metering or feeding applications, function as rotary airlocks, or provide a combination of airlock and metering functions.
504:
was powered by a two-stroke, rotary valve, twin crank, square four engine displacing 498 cubic centimeters. The power output was 93.7 brake horsepower (69.9 kW) at 9,500 RPM.
512:
Rotary valves are used for loading samples on columns used for liquid or gas chromatography. The valves used in these methods are usually 6-port, 2-position rotary valves.
1062:
458:
motorcycle engines, where the arrangement helps to prevent reverse flow back into the intake port during the compression stroke. Austrian engine manufacturer
939:
894:"A Computational Fluid Dynamics Investigation Comparing the Performance of an Alternative Valvetrain Design Against a Traditional Poppet Valvetrain"
701:
1607:
39:
in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. The common
493:
RCV have developed a 125cc rotating cylinder liner engine, incorporating a rotating valve in the cylinder liner, for scooter applications.
853:
466:
two-stroke engine design and continues to use rotary intake valves in the 532's successor, the current-production 64 hp (48 kW)
302:
232:
about disadvantages of rotary valves that have prevented them from being widely used in four-stroke engines, compared with poppet valves.
490:
and small-engine line-up. RCV also use horizontal and vertical rotary valves in four-stroke engines in their current range of engines.
1055:
174:
Rotary valve was first applied to the horn in 1824 by Nathan Adams (1783-1864) of Boston and patented in 1835 by Joseph Riedl.
971:
727:
1048:
774:
382:
600:
877:
Garrett, Norman H.; Uddin, Mesbah; Bergman, Mikael; Purvis, Garrett; Vaseleniuck, Darrick; Cordier, Dan (2022-01-09).
431:
of a compression ignition engine (20:1 compression ratio, 100 bar combustion pressure). They are working with various
1173:
630:
580:
330:
developed a design with a rotary valve that rotated on the same axis as the cylinder bore, but with limited success.
1024:
432:
946:
407:
eliminate the throttle completely, making it vastly more economical at lower engine speeds, so it is claimed.
308:
cost. As inlet and exhaust are usually combined, special attention should be given to valve cooling to avoid
301:
An article explaining the basic benefits of rotary valves in IC engines was published by
Hagerty Media here:
148:, by applying rotary valves to it in the 1820s in France. An alternative to a rotary valve trumpet would be
121:
1266:
1193:
440:
43:
is the simplest form of rotary valve. Rotary valves have been applied in numerous applications, including:
878:
1089:
532:
455:
829:
596:
444:
163:
valves are usually rotary, with several variations on the basic design also in use, such as the Thayer
527:
436:
202:
foreign material from infiltrating the housing and keeps conveyed material from escaping the system.
1343:
1183:
678:
1002:
1338:
1293:
1203:
1136:
352:
Rotary valves are potentially highly suitable for high-revving engines, such as those used in
1328:
1323:
1303:
1228:
1188:
1178:
1131:
1126:
572:
377:
F1 engine used rotary valves but never raced. Between 2002 and 2004 the
Australian developer
1333:
1313:
1308:
1298:
1276:
1218:
1109:
1104:
1071:
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840:
806:
59:
337:
has developed a spherical rotary valve for internal combustion engines which replaces the
8:
1567:
1391:
1318:
1213:
1163:
766:
66:
483:
234:
Please expand the section to include this information. Further details may exist on the
19:
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1208:
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403:
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to commercialize their design. Various patents cover the compliant seal, including
369:
353:
235:
1366:
1361:
978:
905:
390:
346:
164:
117:
48:
673:
454:
A rotary valve in the form of a flat disc, also known as a disc valve, is used in
315:
Rotary valves have been used in several different engine designs. In
Britain, the
1602:
1381:
1371:
1285:
1238:
1141:
497:
of Taiwan were working with RCV in developing the engine for their applications.
462:
used rotary intake valves in their now out-of-production 64 hp (48 kW)
309:
270:
259:
177:
1151:
597:"Corliss' Demonstration Model of a Steam Engine Valve Gear and Spring Dash Pot"
398:
73:
1536:
1531:
1506:
1501:
763:
Internal
Combustion Engines: Improving Performance, Fuel Economy and Emissions
418:
1596:
1562:
1552:
1409:
1198:
1116:
1075:
542:
319:
advertised its rotary valve engine for use in early aircraft, at a time when
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168:
647:
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501:
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374:
361:
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320:
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55:
1353:
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1099:
789:
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327:
137:
125:
110:
87:
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engine speeds, offering approximately perhaps 10% more power. The 1980s
1526:
1521:
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1483:
1478:
1473:
1468:
1463:
1458:
1453:
1441:
1429:
1168:
1121:
83:
972:"The Rotating Cylinder Valve 4-stroke Engine (SAE Paper 2002-32-1828)"
910:
893:
1511:
1448:
1436:
1424:
1419:
1414:
467:
463:
1577:
1572:
1557:
1493:
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as a specialized form of rotary valve in some of their four-stroke
145:
133:
40:
16:
Valve where rotation of passages in a plug controls flow direction
522:
153:
129:
220:
90:
76:
105:
702:"Don't overstuff your pockets and 3 other material flow tips"
459:
36:
1070:
879:
Development of a Rotary Valve Engine for
Handheld Equipment
141:
65:
Periodically reversing the flow of air and fuel across the
876:
427:
422:
ASME of the VAZTEC rotary valve concept with twin valves
96:
Most hydraulic automotive power steering control valves.
443:
model of the VAZTEC rotary valve can be viewed at this
854:"Is this the next great leap for internal combustion?"
648:"Trumpet Vs. Cornet: What's The Real Difference?"
1594:
1022:
620:
940:"RCV Engines Ltd - UK (India – AutoExpo 2004)"
881:(Report). Warrendale, PA: SAE Technical Paper.
800:
798:
323:were prone to failure by sticking or burning.
1056:
1025:"PGO working on rotary valve scooter engine"
761:Institution of Mechanical Engineers (2011).
473:
928:, pages 6-105. Leading Edge Airfoils, 1995.
812:(Special ed.). AutoTechnology Magazine
795:
100:
54:Controlling the steam and exhaust ports of
1063:
1049:
385:tested rotary valves for a F1 V10 engine.
909:
891:
507:
417:
276:
265:
254:
176:
104:
18:
969:
918:
851:
728:"Are rotary airlocks supposed to leak?"
671:
566:
205:
1608:Brass instrument parts and accessories
1595:
804:
625:. London: Penguin Books. p. 195.
210:
1044:
645:
449:
156:players tend to favor rotary valves.
699:
214:
181:Tuba with 4 rotary valves, by Yamaha
623:The New Penguin Dictionary of Music
614:
601:National Museum of American History
368:and spring resonance and where the
13:
830:2020 Leadfoot Festival competitors
725:
484:rotating cylinder liner technology
441:Computational Fluid Dynamics (CFD)
360:racing cars, on which traditional
185:
14:
1619:
892:Robinson, Clay (August 2, 2022).
646:Steen, Alecia (January 6, 2022).
898:ASME Open Journal of Engineering
219:
1016:
995:
963:
937:
931:
885:
870:
845:
834:
823:
783:
754:
745:
719:
693:
665:
639:
589:
560:
144:. The cornet derived from the
1:
852:Gerould, Bryan (2023-02-08).
554:
364:with springs can fail due to
291:
290:Darracq rotary-valve engine (
7:
841:Youtube: Watson-BSA Special
751:Flight magazine, April 1911
515:
317:National Engine Company Ltd
262:rotary valve engine (1912).
10:
1624:
109:Rotary valve for a double
1545:
1492:
1400:
1352:
1284:
1275:
1237:
1082:
807:"The Bishop Rotary Valve"
474:Use in production engines
792:Accessed on 3rd Mar 2011
679:Arizona State University
621:Griffiths, Paul (2006).
573:McGraw Hill Professional
567:Skousen, Philip (2004).
335:Coates International Ltd
101:Use in brass instruments
152:trumpet. Many European
1204:Single-acting cylinder
1137:Double-acting cylinder
672:Ericson, John (1992).
423:
298:
274:
263:
230:is missing information
182:
113:
58:, most notably in the
47:Changing the pitch of
24:
1072:Engine configurations
1023:Jeremy Korzeniewski.
805:Wallis, Tony (2007).
674:"Early Valve Designs"
508:Use in chromatography
437:U.S. Patent 9,903,239
426:A U.S. company named
421:
326:In the end of 1930s,
289:
273:valve cooling (1919).
269:
258:
180:
108:
22:
1174:Oscillating cylinder
1027:. Green.autoblog.com
790:Coates International
502:Suzuki RG500 "Gamma"
206:Use in engine design
60:Corliss steam engine
1267:Two-and four-stroke
1169:Intake over exhaust
767:Woodhead Publishing
211:Four-stroke engines
67:open hearth furnace
33:rotary-motion valve
924:Raisner, William:
450:Two-stroke engines
424:
404:Kawasaki Ninja 300
299:
275:
264:
198:point to another.
183:
116:In the context of
114:
72:Loading sample on
25:
1590:
1589:
1586:
1585:
1286:Inline / straight
1184:Overhead camshaft
1003:"rcv_engines_ltd"
911:10.1115/1.4054966
776:978-0-85709-205-2
700:Thompson, Megan.
379:Bishop Innovation
370:desmodromic valve
354:racing sportscars
287:
253:
252:
118:brass instruments
82:Certain types of
49:brass instruments
1615:
1282:
1281:
1277:Cylinder layouts
1065:
1058:
1051:
1042:
1041:
1036:
1035:
1033:
1032:
1020:
1014:
1013:
1011:
1010:
1005:. Rcvengines.com
999:
993:
992:
990:
989:
983:
977:. Archived from
976:
967:
961:
960:
958:
957:
951:
945:. Archived from
944:
935:
929:
922:
916:
915:
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883:
882:
874:
868:
867:
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593:
587:
586:
564:
433:OE manufacturers
347:engine-generator
296:
293:
288:
248:
245:
239:
223:
215:
165:axial flow valve
1623:
1622:
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846:
839:
835:
828:
824:
815:
813:
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803:
796:
788:
784:
777:
769:. p. 135.
759:
755:
750:
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736:
734:
724:
720:
710:
708:
698:
694:
684:
682:
670:
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656:
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619:
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603:
595:
594:
590:
583:
571:(2d ed.).
565:
561:
557:
552:
518:
510:
480:RCV Engines Ltd
476:
452:
310:engine knocking
294:
277:
249:
243:
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188:
186:Use in industry
103:
35:) is a type of
17:
12:
11:
5:
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1234:
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1191:
1189:Overhead valve
1186:
1181:
1179:Opposed-piston
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1171:
1166:
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1080:
1079:
1076:piston engines
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726:Bowman, Paul.
718:
692:
664:
652:primesound.org
638:
631:
613:
588:
581:
575:. p. 11.
569:Valve Handbook
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383:Mercedes-Ilmor
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74:chromatography
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6:
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1239:Stroke cycles
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1004:
998:
984:on 2011-11-12
980:
973:
970:Keith Lawes.
966:
952:on 2011-11-12
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858:Hagerty Media
855:
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582:9780071501422
578:
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543:Rotary feeder
541:
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391:Honda CRF 450
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362:poppet valves
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321:poppet valves
318:
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228:This section
226:
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170:
169:Hagmann valve
166:
162:
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127:
124:are found on
123:
122:rotary valves
119:
112:
107:
95:
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81:
78:
75:
71:
68:
64:
61:
57:
56:steam engines
53:
50:
46:
45:
44:
42:
38:
34:
31:(also called
30:
21:
1568:Split-single
1354:Flat / boxer
1214:Swing-piston
1029:. Retrieved
1018:
1007:. Retrieved
997:
986:. Retrieved
979:the original
965:
954:. Retrieved
947:the original
933:
926:LEAF catalog
925:
920:
901:
897:
887:
872:
861:. Retrieved
857:
847:
836:
825:
814:. Retrieved
785:
762:
756:
747:
735:. Retrieved
731:
721:
709:. Retrieved
705:
695:
685:February 24,
683:. Retrieved
677:
667:
657:February 24,
655:. Retrieved
651:
641:
622:
616:
606:February 24,
604:. Retrieved
591:
568:
562:
538:Poppet valve
533:Piston valve
511:
499:
495:PGO Scooters
492:
488:model engine
479:
477:
453:
425:
413:
409:
395:
387:
378:
351:
339:poppet valve
334:
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316:
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241:
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200:
196:
193:
189:
173:
161:F attachment
158:
150:piston valve
115:
32:
29:rotary valve
28:
26:
1257:Five-stroke
1252:Four-stroke
1209:Split cycle
1147:Free-piston
1090:Atmospheric
548:Slide valve
478:UK company
366:valve float
344:natural gas
333:US company
328:Frank Aspin
295: 1919
271:Italarotary
138:flugelhorns
88:four-stroke
1597:Categories
1262:Six-stroke
1247:Two-stroke
1164:Heron head
1122:Cam engine
1031:2014-04-18
1009:2014-04-18
988:2012-01-03
956:2012-01-03
863:2024-06-03
816:2011-12-26
732:ACS Valves
706:ACS Valves
555:References
528:Itala cars
456:two-stroke
84:two-stroke
468:Rotax 582
464:Rotax 532
236:talk page
159:Trombone
134:trombones
1194:Pentroof
1142:Flathead
1132:Compound
1110:Rotative
516:See also
399:MG Rover
244:May 2022
167:and the
146:posthorn
130:trumpets
41:stopcock
1402:V / Vee
1219:Uniflow
1152:Stelzer
1127:Camless
1105:Cornish
737:21 July
711:21 July
523:Airlock
375:MGN W12
154:trumpet
91:engines
77:columns
1603:Valves
1563:Radial
1553:Deltic
1199:Rotary
1117:Bourke
773:
629:
579:
428:VAZTEC
140:, and
1546:Other
1229:Wedge
1095:Axial
982:(PDF)
975:(PDF)
950:(PDF)
943:(PDF)
938:RCV.
810:(PDF)
482:uses
460:Rotax
445:link.
260:Itala
142:tubas
126:horns
37:valve
1224:Watt
1159:Hemi
1100:Beam
1083:Type
1074:for
771:ISBN
739:2021
713:2021
687:2022
659:2022
627:ISBN
608:2022
577:ISBN
500:The
439:. A
381:and
356:and
303:link
111:horn
86:and
1537:W30
1532:W24
1527:W18
1522:W16
1517:W12
1484:V24
1479:V20
1474:V18
1469:V16
1464:V14
1459:V12
1454:V10
1442:VR6
1430:VR5
1392:F16
1387:F12
1382:F10
1344:I14
1339:I12
906:doi
470:.
1599::
1512:W8
1507:W6
1502:W3
1449:V8
1437:V6
1425:V5
1420:V4
1415:V3
1410:V2
1377:F8
1372:F6
1367:F4
1362:F2
1334:I9
1329:I8
1324:I7
1319:I6
1314:I5
1309:I4
1304:I3
1299:I2
1294:I1
904:.
900:.
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797:^
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599:.
358:F1
349:.
312:.
292:c.
171:.
136:,
132:,
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27:A
1578:X
1573:U
1558:H
1494:W
1064:e
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297:)
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242:(
238:.
93:.
79:.
69:.
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51:.
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