Heating means for the intake system of a water-cooled combustion engine
AssigneeAudi NSU Auto Union Aktiengesellschaft
InventorWolfgang Bihler
Life of this patent
Estimating the term…
Abstract
A water-cooled combustion engine has a pump-operated cooling water circuit passing through the cooler when the engine is hot. The cooler is rendered inoperative by a thermostat-controlled by-pass line when the engine is cold. The heating means for the intake system for the engine has a cooling water chamber whose supply line is fed with heated cooling water. The circuit of the heating means is arranged parallel with the cooling circuit through the by-pass line. This heating means is automatically switched off without additional aids as the engine temperature rises, when the by-pass line is shut off by the thermostat valve.
Claims3
A water-cooled combustion engine having a cooling water inlet and a cooling water outlet, a cooling water pump, a first cooling water circuit comprising a first line from said outlet to said inlet and a second cooling water circuit comprising a second line from said outlet to said inlet, a cooler in said first line, a thermostatic valve for closing said first circuit and opening said section circuit when the engine is cold, and vice versa when the engine is warm, the engine having an intake system with a heating means which comprises a cooling water flow chamber having a supply line connected to said first line upstream of the cooler and a return line connected to said second line and a non-return valve to prevent flow of cooling water from said return line through said flow chamber and supply line.
Dependencies are inferred from the claim text.