CVTs or Continuously Variable Transmissions are now being widely used in many automobiles. Although CVTs were invented more than a hundred years ago, it is only in recent years that their use in cars is gaining ground.
Instead of the fixed gears as in a conventional transmission, a CVT uses a pulley and belt system to provide an unlimited range of gear ratios, allowing an engine to stay at its peak power throughout its operation. This results in stepless shifting, eliminates shift shock and negates the deceleration that occurs when an engine is in between gear shifts. Better fuel economy is also another benefit from a CVT as the engine's revs are always kept optimum, thus there is little or no wasted power.
Another technology that has become so popular is the common rail diesel engine with turbocharger and intercooler. It is a fact that diesel engines burn less fuel than gasoline engines performing the same work, are more reliable, last longer and are more resistant to the effects of humidity and dampness. A common rail diesel injection engine takes the technology further as its fuel injection pressure is generated by a high pressure pump-separate from the injector itself-and functions independently of the engine speed and the quantity of fuel injected. The high pressure atomizes the fuel and air mixture, which results in more complete combustion, increased fuel efficiency, lower noise and reduced emissions.
Turbochargers, meanwhile, allow engines with smaller displacements to generate the horsepower of bigger engines by using the exhaust gases to spin a turbine, which in turn compresses and forces a constant volume of fuel and air into the intake manifold. When an intercooler is used in conjunction with a "turbo," the compressed gases are cooled before they are forced into the intake manifold increasing the density of the charge, resulting in greater volumetric efficiency.
All of Great Wall's gasoline engines are Euro 4-compliant, while its diesel engines are Euro 3-compliant. This means that its vehicles meet the stringent standards for acceptable exhaust emissions of new vehicles sold in European Union member states.
In keeping with European, North American and Asian car companies, Great Wall Cars of China also incorporates the latest technologies it continuously develops in-house and in close collaboration with Bosch of Germany in its products such as the Wingle pickup and Hover SUV, which are fitted with CRDi engines, and the Coolbear passenger car, which is now available with a CVT.