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The Valveless was an English automobile manufactured, after lengthy development, from 1908 until 1915 in Huddersfield, Yorkshire. The successor to the Ralph Lucas Valveless, the car marked the entry of the David Brown & Sons group into the manufacture of motors. Its engine was a 20 or 25 hp duplex two-stroke model which was advertised as having "only six working parts"; these included two pistons, two connecting rods, and two crankshafts, which were geared together and counter-rotated. This is a type of engine configuration known as a split single since it is effectively a single cylinder split into two.

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  • Valveless (de)
  • Valveless (es)
  • Valveless (en)
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  • Valveless war ein englischer Hersteller von Automobilen aus Huddersfield in West Yorkshire, der 1908 von Ralph Lucas gegründet wurde. Lucas hatte bereits seit 1901 Fahrzeuge unter diesem Markennamen hergestellt, ohne ein Unternehmen zu gründen. Später übernahm die David Brown Group den Betrieb. 1915 endete die Produktion. (de)
  • The Valveless was an English automobile manufactured, after lengthy development, from 1908 until 1915 in Huddersfield, Yorkshire. The successor to the Ralph Lucas Valveless, the car marked the entry of the David Brown & Sons group into the manufacture of motors. Its engine was a 20 or 25 hp duplex two-stroke model which was advertised as having "only six working parts"; these included two pistons, two connecting rods, and two crankshafts, which were geared together and counter-rotated. This is a type of engine configuration known as a split single since it is effectively a single cylinder split into two. (en)
  • El Valveless fue un automóvil inglés fabricado, después de un largo desarrollo, desde 1908 hasta 1915 en Huddersfield, Yorkshire. Su nombre (en inglés, valveless significa "sin válvulas") hace referencia a que el diseño de su motor de dos tiempos carecía de válvulas. Sucesor del Valveless, el automóvil marcó la entrada del grupo David Brown & Sons en la fabricación de motores. Utilizaba un modelo de motor de pistón doble de dos tiempos de 20 o 25 CV. En la publicidad se anunciaba que este motor "solo tiene seis partes funcionales": dos pistones, dos bielas y dos cigüeñales, que estaban engranados juntos y giraban en sentido contrario. Este es un tipo de configuración de motor conocido como motor de pistón doble, ya que es efectivamente un solo cilindro dividido en dos, compartiendo una ún (es)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Valveless_Car.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Two_stroke_Valveless_engine,_working_cycle_(Autocar_Handbook,_Ninth_edition).jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/US952706-0.png
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  • Valveless war ein englischer Hersteller von Automobilen aus Huddersfield in West Yorkshire, der 1908 von Ralph Lucas gegründet wurde. Lucas hatte bereits seit 1901 Fahrzeuge unter diesem Markennamen hergestellt, ohne ein Unternehmen zu gründen. Später übernahm die David Brown Group den Betrieb. 1915 endete die Produktion. (de)
  • El Valveless fue un automóvil inglés fabricado, después de un largo desarrollo, desde 1908 hasta 1915 en Huddersfield, Yorkshire. Su nombre (en inglés, valveless significa "sin válvulas") hace referencia a que el diseño de su motor de dos tiempos carecía de válvulas. Sucesor del Valveless, el automóvil marcó la entrada del grupo David Brown & Sons en la fabricación de motores. Utilizaba un modelo de motor de pistón doble de dos tiempos de 20 o 25 CV. En la publicidad se anunciaba que este motor "solo tiene seis partes funcionales": dos pistones, dos bielas y dos cigüeñales, que estaban engranados juntos y giraban en sentido contrario. Este es un tipo de configuración de motor conocido como motor de pistón doble, ya que es efectivamente un solo cilindro dividido en dos, compartiendo una única cámara de combustión. (es)
  • The Valveless was an English automobile manufactured, after lengthy development, from 1908 until 1915 in Huddersfield, Yorkshire. The successor to the Ralph Lucas Valveless, the car marked the entry of the David Brown & Sons group into the manufacture of motors. Its engine was a 20 or 25 hp duplex two-stroke model which was advertised as having "only six working parts"; these included two pistons, two connecting rods, and two crankshafts, which were geared together and counter-rotated. This is a type of engine configuration known as a split single since it is effectively a single cylinder split into two. (en)
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