The technical term 'lean-burn' originally refers to less polluting versions of what energy technology?
Petroleum engine Internal-combustion engine Fossil fuel vehicle Charge (engine) Internal combustion engine vehicle AFFICEV I c engines Engine idling Internal combustion engine Reciprocating internal combustion engine Traditional vehicle Internal combustion Vehicle with an internal combustion engine Internal Combustion Engines Car Motor Engine type IC engine Internal Combustion Car engines Internal combustion gasoline engine Internal Combustion Engine Internal combustion engines Petroleum fuel engine Conventional car Internal combustion piston engine APICEV Car engine Internal-Combustion Engine Fossil fuel internal combustion engine Combustion engines Fossil fuel engine Gasoline/Petrol engine ICEV Internal-combustion Combustion car All-petroleum internal combustion engine vehicle
fossil fuel vehicle icev petroleum fuel engine ic engine internal combustion piston engine traditional vehicle reciprocating internal combustion engine internal combustion gasoline engine i c engines afficev petroleum engine car engine apicev charge engine conventional car car engines car motor combustion car engine type engine idling vehicle with internal combustion engine internal combustion engines fossil fuel engine internal combustion engine internal combustion gasoline petrol engine all petroleum internal combustion engine vehicle internal combustion engine vehicle fossil fuel internal combustion engine combustion engines
internal combustion engine
WikipediaEntity
Internal combustion engine