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Sistema de Comando das Borboletas
       para Acionamento do 2º Estágio – Veículos Carburados




      O sistema funciona através de um dispositivo pneumático que aciona a
borboleta do 2º estágio; este dispositivo é comandado pela depressão formada nos
difusores do carburador.
      Nos motores a álcool, existe uma válvula eletropneumática de retardo do 2º
estágio, e uma restrição calibrada no dispositivo pneumático.
      Enquanto a lâmpada de alerta do afogador estiver acesa, a válvula
eletropneumática e a restrição calibrada farão com que a abertura da borboleta do
2º estágio seja lenta e progressiva. Isso garante uma aceleração gradual, durante a
fase de aquecimento do motor.
      Para que a abertura da borboleta do 2º estágio aconteça, é necessário que:
                  A borboleta do 1º estágio esteja, no mínimo, a 53º de abertura
      para os modelos à gasolina e a 43º para os modelos a álcool;
                  A depressão nos difusores seja suficiente para acionar o
      diafragma.
Com isso, mais economia e melhor dirigibilidade estarão garantidas, já que o
funcionamento vai depender da depressão provocada nos difusores, e não da
maneira de dirigir do motorista.

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Sistema de Comando das Borboletas para Acionamento do 2º Estágio - Veículos Carburados

  • 1. Sistema de Comando das Borboletas para Acionamento do 2º Estágio – Veículos Carburados O sistema funciona através de um dispositivo pneumático que aciona a borboleta do 2º estágio; este dispositivo é comandado pela depressão formada nos difusores do carburador. Nos motores a álcool, existe uma válvula eletropneumática de retardo do 2º estágio, e uma restrição calibrada no dispositivo pneumático. Enquanto a lâmpada de alerta do afogador estiver acesa, a válvula eletropneumática e a restrição calibrada farão com que a abertura da borboleta do 2º estágio seja lenta e progressiva. Isso garante uma aceleração gradual, durante a fase de aquecimento do motor. Para que a abertura da borboleta do 2º estágio aconteça, é necessário que:  A borboleta do 1º estágio esteja, no mínimo, a 53º de abertura para os modelos à gasolina e a 43º para os modelos a álcool;  A depressão nos difusores seja suficiente para acionar o diafragma.
  • 2. Com isso, mais economia e melhor dirigibilidade estarão garantidas, já que o funcionamento vai depender da depressão provocada nos difusores, e não da maneira de dirigir do motorista.