What Emission Standard Does the Prado Meet?
1 Answers
The emission standard of the Prado is as follows: The Prado meets the China V emission standard. 1. The China V emission standard is the fifth stage national standard for motor vehicle pollutant emissions, also known as "China V Standard". 2. From China I to China V, each upgrade in the standard reduces vehicle pollution by 30%-50%. The China V Standard was implemented nationwide on January 1, 2017. Below is an introduction to vehicle exhaust emissions: 1. Vehicle emissions refer to harmful gases such as CO, hydrocarbons, nitrogen oxides (NOx), and PM (particulate matter) discharged from the exhaust. 2. These harmful gases are produced during the combustion process in the engine. The reasons for their production vary: CO is an intermediate product of incomplete fuel oxidation, occurring when oxygen is insufficient. High fuel mixture concentration and uneven mixture distribution can increase CO in the exhaust. 3. HC (hydrocarbons) are unburned substances from the fuel, caused by uneven mixture distribution or cold combustion chamber walls, leading to some fuel being emitted without complete combustion. 4. NOx is produced during the combustion process of fuel. PM is also a substance generated when fuel burns under oxygen-deficient conditions, most notably in diesel engines. This is because diesel engines use compression ignition, and diesel fuel is more prone to cracking under high temperature and pressure, producing visible carbon soot.
