{"id":4003,"date":"2014-04-12T19:30:39","date_gmt":"2014-04-12T17:30:39","guid":{"rendered":"http:\/\/www.pudenitroz.se\/blogg\/?p=4003"},"modified":"2014-04-14T15:22:21","modified_gmt":"2014-04-14T13:22:21","slug":"nar-enkrets-blev-tvakrets","status":"publish","type":"post","link":"https:\/\/www.pudenitroz.se\/blogg\/?p=4003","title":{"rendered":"N\u00e4r enkrets blev tv\u00e5krets?"},"content":{"rendered":"<p>F\u00e5r n\u00e5gra m\u00e5nader sedan s\u00e5 diskuterades det p\u00e5 forumet p\u00e5 <a title=\"Hundkoja.com\" href=\"http:\/\/hundkoja.com\/j\/f\" target=\"_blank\">hundkoja.com<\/a> n\u00e4r lagen om krav p\u00e5 tv\u00e5krets bromssystem tr\u00e4dde i kraft.<\/p>\n<p>Jag har om inte legat s\u00f6mnl\u00f6s s\u00e5 \u00e5tminstone f\u00f6rs\u00f6kt skingra fr\u00e5getecknen omkring detta, personligen s\u00e5 var jag ganska s\u00e4ker p\u00e5 att lagen kom 1974 och g\u00e4llde fr\u00e5n modell\u00e5ret 1975.<\/p>\n<p>Anledningen till min tr\u00e5ngsynthet var helt enkelt att den f\u00f6rsta koja jag haft med tv\u00e5kretssystem var just en 75:a och sen 25 \u00e5r senare s\u00e5 blev det ett likhetstecken med tv\u00e5kretssystemet introduktion p\u00e5 hundkoja. Men med lite mer eftertanke s\u00e5 l\u00e4t det sent och p\u00e5 forumet kom ocks\u00e5 r\u00e4tt svar n\u00e4mligen modell\u00e5ret 1972.<\/p>\n<p>Men hur l\u00e5g det d\u00e5 till? Trots ganska omfattande googlande s\u00e5 var bilden fortfarande inte helt klart.<\/p>\n<p>S\u00e5 jag fr\u00e5gade en &#8221;gammal&#8221; motorjournalist jag k\u00e4nner och som var med och aktiv n\u00e4r tv\u00e5kretssystem introducerades, nedan kan ni l\u00e4sa hans svar i sin helhet.<\/p>\n<p><em>S\u00e5 h\u00e4r \u00e4r det:<\/em><\/p>\n<p><em>Redan p\u00e5 50-talet d\u00f6k Citroen D-serien (\u201dPaddan\u201d) och Jensen upp med axelvis, tv\u00e5krets bromssystem.<\/em><br \/>\n<em>P\u00e5 60-talet kom Saab 96 med diagonalt och \u2013 det vet Du redan \u2013 Volvo med triangeldelat bromssystem. (1966 red anm\u00e4rkning)<br \/>\n<\/em><\/p>\n<p><em>I Sverige inf\u00f6rdes krav p\u00e5 tv\u00e5 av varandra oberoende kretsar p\u00e5 1972 \u00e5rs modell, vilket innebar att det i praktiken g\u00e4llde fr\u00e5n augusti 1971 (d\u00e5 man bytte \u00e5rsmodell p\u00e5 den tiden)<\/em><\/p>\n<p><em>N\u00e4r Sverige gick med i EU harmoniserades kraven p\u00e5 systemet och numera g\u00e4ller att det skall finnas p\u00e5 \u00e5rsmodell 1974 och fram\u00e5t (enligt Transportstyrelsens f\u00f6reskrifter 2013: 63 kapitel 12, \u00a7 26, f\u00f6rsta stycket)<\/em><\/p>\n<p>S\u00e5 1974 var ju inte helt upp\u00e5t v\u00e4ggarna \u00e4nd\u00e5 \ud83d\ude09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>F\u00e5r n\u00e5gra m\u00e5nader sedan s\u00e5 diskuterades det p\u00e5 forumet p\u00e5 hundkoja.com n\u00e4r lagen om krav p\u00e5 tv\u00e5krets bromssystem tr\u00e4dde i kraft. Jag har om inte legat s\u00f6mnl\u00f6s s\u00e5 \u00e5tminstone f\u00f6rs\u00f6kt skingra fr\u00e5getecknen omkring detta, personligen s\u00e5 var jag ganska s\u00e4ker &hellip; <a href=\"https:\/\/www.pudenitroz.se\/blogg\/?p=4003\">Forts\u00e4tt l\u00e4sa <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-4003","post","type-post","status-publish","format-standard","hentry","category-mini-relaterat"],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p30Qc6-12z","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=\/wp\/v2\/posts\/4003","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4003"}],"version-history":[{"count":3,"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=\/wp\/v2\/posts\/4003\/revisions"}],"predecessor-version":[{"id":4025,"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=\/wp\/v2\/posts\/4003\/revisions\/4025"}],"wp:attachment":[{"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pudenitroz.se\/blogg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}