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Allowing an engine to warm up before driving is no longer needed. Today's engines are designed with much tighter tolerances and use lubricants that flow (in most cases) like water, per Shelton ...
The engine temperature on modern cars is primarily controlled by a wax-pellet type of thermostat, a valve that opens once the engine has reached its optimum operating temperature. When the engine is cold, the thermostat is closed except for a small bypass flow so that the thermostat experiences changes to the coolant temperature as the engine ...
Carfax said modern cars use electronic fuel injection instead of a carburetor. The system helps promptly deliver the right air-fuel mixture, and your vehicle is ready to hit the road within ...
This most common modern form of thermostat now uses a wax pellet inside a sealed chamber. [6] Rather than a liquid-vapour transition, these use a solid-liquid transition, which for waxes is accompanied by a large increase in volume. The wax is solid at low temperatures, and as the engine heats up, the wax melts and expands.
The 2016 Chevrolet Malibu Hybrid car features an Exhaust gas Heat Recovery (EGHR) system to accelerate coolant heat up time. This gives faster heat up of the engine coolant which in turn heats up the engine faster. Less fuel is used giving reduced emissions. This will also quicken cabin heating warm up for passenger comfort and window defrosting.
[34] [35] It was an early type of automobile air conditioner [36] and is not used in modern cars relying on refrigerative systems to cool the interior. To cool the air it used latent heat (in other words, cooling by water evaporation). [37] Water inside the device evaporates and in the process transfers heat from the surrounding air.
However, all common antifreeze additives also have lower heat capacities than water, and do reduce water's ability to act as a coolant when added to it. [2] Because water has good properties as a coolant, water plus antifreeze is used in internal combustion engines and other heat transfer applications, such as HVAC chillers and solar water heaters.
All modern cars are now equipped with catalytic converters to further reduce vehicle emissions. Leading up to the 1981 model year in the United States, passenger vehicle manufactures were faced with the challenges in its history of meeting new emissions regulations, how to meet the much more restrictive requirements of the Clean Air Act (United ...