HELLA introduces top-end UP5.0 electric vacuum pump for brake systems; increased fuel efficiency
Green Car Congress
MAY 17, 2016
hybrid vehicles, downsizing, plug-ins)—or under some specific operating conditions (e.g. during the cold start/warm-up phase, driving at extreme altitudes or when using the air-conditioning system)—the vacuum produced by the engine is no longer sufficient—or sometimes even available.
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