Por que os pneus dos carros têm a forma de círculos?
Os pneus se movem rolando. E a forma circular é a mais adequada para esse fim, poismantém um contato uniforme e suave com a superfície. Qualquer forma que não seja redonda - pense em quadrado, retangular, hexagonal, etc - tem arestas ou pontos que cavam na estrada. Isso torna o movimento mais lento.
Desgaste do pneu - também às vezes referido como fora de círculo -envolve um pneu que não é mais perfeitamente redondo. Como resultado, o equilíbrio do pneu será deslocado. Até certo ponto, o runout não afetará o desempenho de um carro.
Para diminuir a força de atrito, as rodas dos automóveis são projetadas para serem arredondadas. As rodas são feitas para serem redondas porque o atrito de rolamento é preferível ao atrito de deslizamento. O movimento de carros e outros veículos teria sido mais difícil e causaria atrito se as rodas tivessem um desenho diferente.
Radial, ou desvio para cima e para baixo, é uma condição oval, como uma forma de ovo no raio ou na circunferência da roda ou pneu. Você pode pensar nisso como uma roda que foi batida com força diretamente contra (diretamente em) um meio-fio ou buraco severo.
O círculo de atrito é literalmenteum gráfico em um gráfico que representa a aderência máxima de um pneu tanto na lateral (curvas à esquerda ou direita) quanto na longitudinal (freando e acelerando). Normalmente, embora varie, virar para a direita é uma pegada lateral positiva e virar para a esquerda é uma pegada lateral negativa.
Uma roda é um componente circularque se destina a girar em um rolamento de eixo.
Componentes de suspensão como amortecedores, suportes, buchas e outros se desgastam com os quilômetros percorridos. O resultado pode ser um pneu que não consegue mais rodar suavemente na estrada; em vez disso, salta ligeiramente. Esse ressalto cria pontos desiguais de pressão nos pneus, levando ao desgaste dos pneus.
A retificação de pneus é um processo que usa uma máquina do tipo torno para raspar suavemente o excesso de borracha, eliminando pontos planos e “ovalizados”, resultando em um pneu perfeitamente redondo que pode ser balanceado em alta velocidade adequadamente.
Rodas e pneus de carros sãogeralmente não perfeitamente redondo, mesmo quando são novos. Seu peso geralmente não é distribuído uniformemente, então eles podem ser mais pesados em alguns pontos. Por isso é importante ter os pneus balanceados para evitar problemas.
As formas circulares e quadradas que você pode ver na frente, na traseira ou possivelmente em ambos os para-choques são, na verdade,tampas de olho de reboque(também chamados de tampas de gancho de reboque). Assim que esses pequenos painéis de plástico forem retirados - não se preocupe, eles se encaixam de volta no lugar - você verá uma porca soldada, que faz parte da viga do para-choque do veículo.
O que são os círculos coloridos nos pneus?
Onde estão os pontos de tinta colocados?Os pontos amarelos identificam onde o pneu pesa menos — o ponto mais leve do pneu. O ponto amarelo deve ficar alinhado e logo ao lado da haste da válvula, que é o ponto mais pesado da roda. Os pontos vermelhos identificam onde o pneu está mais furado - o ponto mais baixo de um pneu.
Essa ilusão é conhecida como 'efeito roda de carroça' e tudo se resume à função do olho humano e à forma como o nosso cérebro consegue interpretar e processar as imagens que lhe são apresentadas.
Ponto marca o local
Os pontos amarelos podem ajudar a minimizar a quantidade de peso necessária para equilibrar um conjunto de pneu e roda montando o pneu de forma que seu ponto mais leve já esteja alinhado com o ponto mais pesado da roda. O ponto amarelo indica onde o fabricante identificou o ponto mais claro no pneu.
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