Tutorial: Physics Topic: Cooling engine system Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován.

Prezentace na téma: "Tutorial: Physics Topic: Cooling engine system Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován."— Transkript prezentace:

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2 Tutorial: Physics Topic: Cooling engine system Prepared by : RNDr. Ondřej Jeřábek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

3 Cooling engine system

4 General information:  Provides heat transfer from engine valves  Ensures constant temperature of engine  Provides quicker reaching of operation temperature  Provides car heating  Types of cooling system:  Liquid cooling system  Air cooling system

5  Engine  Heat source  Thermostat  Opens and closes cooling liquid cycle  Cooler  Provides cooling of cooling liquid  Cooling liquid  Provides heat conduction of engine valves

6  Technical system used to keeping constant temperature  Thermostat output can influence cooling, heating or air-conditioning  Mechanical thermostats  They are controlled by heat expansion of liquids or gases  For regulation of car cooling system there are used thermostats with wax charge  Wax expanses when it is heated and it shrinks when it is cooled

7  Technical system used to heating exchange  For coolers´ production there are used materials with high temperature conductance e.g. aluminium and copper  Metal piping usually goes through cooler which is covered by aluminium material  Active cooler  Cooler with fan  Fan provides air flow when the car is not running  Fan provides quick heat removal

8  Requirements:  Take as much heat as possible to weight unit  Not to cause corrosion of cooling system – corrosion generally comes when pH falls down below value 8  Provide cooling at low temperatures - cooling liquid is filled with anti-freezing mixture  The shortest exchange interval – cooling liquids of modern cars have the same durability as engine durability

9  Heat source  Cooling liquid flows through places with the highest heat loading, it means through engine block and engine head  Engine valves are washed by cooling liquid directly or indirectly  Operation engine temperature is about 90°C  Keeping operation temperature is important because of engine efficiency and lubrication

10  Describe parts of engine liquid cooling

11  Find out on the Internet thermostat and cooler and explain their function

12  JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 1. Brno : Avid, 2004. 211 s.  JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 2. Brno : Avid, 2004. 120 s.  JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 3. Brno : Avid, 2004. 220 s.  JAN, Zdeněk; ŽDÁNSKÝ, Bronislav ; ČUPERA, Jiří. Automobily 4. Brno : Avid, 2004. 350 s. Translation:  www.seznam.cz www.seznam.cz  www.slovnik.cz www.slovnik.cz  JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, 2000. ISBN 80-7238-075-3  Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický. 2010.