prompt: Can you explain to me how an internal combustion engine works and how have they improved over the years?
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: Can you explain to me how an internal combustion engine works and how have they improved over the years?
chosen.role: assistant
chosen.content: Internal combustion engines are found in all sorts of machines ranging from lawnmowers to large freighters that navigate the oceans. These engines run on a large variety of fuels which include the usual gas and diesel, but they can also run on fuels like natural gas, propane, biodiesel, or even ethanol. All these fuels have one thing in common, they are all combustible. The process of combustion, or burning, results in an energy release from a mixture of fuel and air. 
  
  An internal combustion engine contains various components, but for simplicity's sake, let's focus on the fixed cylinder, pistons, crankshaft, powertrain, and ultimately the wheels. In an internal combustion engine, combustion happens within the engine by the ignition from a spark plug where that energy release is partially converted to do work. These expanding combustion gases will push the pistons which will then rotate the crankshaft, and, ultimately through a system of gears within the powertrain, will spin the wheels of the vehicle causing it to move. 
  
  Since its creation, the internal combustion engine has been improved upon in several ways. For one, it has been integrated with hybrid electric powertrains to increase fuel economy by sharing the burden of moving the vehicle with the electric engine along with working side-by-side with plug-in hybrid electric systems where the electric motor will move the vehicle on its own up to certain speeds and distances to increase the range. Additionally, through years of R&D, manufacturers can reduce ICE emissions of certain pollutants like nitrogen oxide and particulate matter by more than 99%. Also, ICE performance has been drastically improved over the years in terms of overall horsepower and acceleration time along with using less fuel and increasing efficiency.
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: Can you explain to me how an internal combustion engine works and how have they improved over the years?
rejected.role: assistant