Saturn S series Twin Cam cylinder head had now featured a new roller-rocker setup with hydraulic tappets and roller cams replacing the conventional bucket lifter setup of the previous engine in the S series. Also introduced for the 1999 model year S-series vehicles that were sold in California was a different type of an exhaust manifold that housed an upstream catalytic converter (this converter had heated up much faster than the conventional unit, and it had also decreased exhaust emissions faster as well), and it also had provisions for an air-injection reaction system (This had injected fresh air into the exhaust to reduce
Exhaust heat recovery system generally geared toward larger equipment such as large on-highway trucks, diesel generators, large buses and motor-homes, marine vessels, medium duty trucks, etc. IFPEN, Enogia and Alstom are developing a system called Trenergy dedicated to improve train fuel efficiency. Fuel efficiency, reduction of CO2 emissions, reliability and costs are necessary parts of Formula 1 manufacturers’ strategies. Automobile sport competitions is a good place to try and assess technologies that, once reliable, are adapted to private cars. As much as kinetic energy recovery system, Formula 1 constructors have produced one of the first exhaust heat recovery systems. Nowadays these devices are essential