All cars need energy for propulsion. When they decelerate and stop, the energy is wasted in braking. Why not recapture the braking energy, store it and use it for acceleration later on? That is ...

Launched together with the mighty Porsche 959 supercar in 1987, Porsche-Steuer Kupplung (PSK) was probably the world's first electronic-controlled 4WD system. Incredibly, even after 30 years, it is ...

As many people know, mechanical superchargers are good for low-end output but short of high-end efficiency, while exhaust turbochargers work strongly at high rev but reluctantly at low rev. For ...

The close partnership between French car maker Peugeot and famous Italian design house Pininfarina produced many beautiful cars in the 1980s and 1990s, including 205 Cabriolet, 306 Cabriolet, 405 and ...

Combining cam-changing VVT and cam-phasing VVT may satisfy the requirement of both top-end power and flexibility throughout the whole rev range, though it is inevitably more complex. At the time of ...

The earliest road-worthy electric cars emerged in 1880s, about the same time as motor cars. However, they failed to catch the public because the batteries then were very heavy, stored little energy ...

Continuously Variable Transmission is getting more and more popular on small to mid-size cars, eating the market share of manual and low-end automatic transmissions. In 2015, the world produced 11.3 ...

The first time I heard about twin-scroll turbo was in 1989, when the updated Mazda RX-7 Mk2 introduced this feature. It was employed to seperate the exhaust gas from the Wankel engine's two rotors in ...

A refined engine should be smooth running, free of vibration and quiet. These qualities also help the engine to spin freer at high rpm, lifting red line hence power output. Engine smoothness depends ...

First introduced by Mercedes 300SL in 1954, tuned intake manifold is not exactly a new technology. It is discussed here just because its principle is useful to our further study of variable intake ...

Having read the True Story of 959, I believe you have already got a clear view of this supercar, no matter the bright side or dark side. To me, 14 years after reading the first article about 959, I ...

As shown in the picture, straight-6 engine is simply a pair of 3-cylinder engines mated together symmetrically, thus piston 1 is always in the same position as piston 6, piston 2 the same as piston 5.