Why do ordinary cars use gasoline engines instead of diesel engines?

I think there are the following aspects.

First, gasoline engines are more suitable for the current national conditions.

The biggest advantage of diesel engine is large torque and good economy, and its fuel consumption is 30% lower than that of the same gasoline engine. Although it has many advantages, it also has many disadvantages. Cars are gasoline engines, which are in line with the current national conditions and human feelings.

Second, different ways of working.

The compression ratio of diesel engines is generally 16 ~ 22, while that of gasoline engines is only10 ~1. Diesel engine is a compression ignition engine, and there is no gasoline engine ignition system. The diesel injected into the cylinder is spontaneously ignited by the heat of high temperature and high pressure air compressed by the piston. Diesel is compression ignition, which means that as long as my parts are strong enough, I can get more power. In order to adapt to the harsh working environment with high compression ratio, the engine block must have sufficient strength. This is why the diesel engine with the same displacement is bigger and heavier than the gasoline engine, and it produces more vibration and noise when running. Tractors, for example, are a typical example. Anyone who has worked as a tractor knows this feeling. People who haven't experienced it can give it a try.

Third, the cost is huge.

For ordinary families, cars are still a huge expense, coupled with China people's mentality of keeping up with the joneses and following blindly. And because of the general bad impression of diesel engines. It is inevitable that there will be doubts when buying diesel engine models. When refueling, run and queue up for shopping carts. The feeling of being pointed at is hard to describe. Tell your friends that your car is diesel and see their reaction.

Fourth, environmental protection.

Nowadays, the emission standards are more and more strict, but the sales of diesel vehicles are very poor because they are not popular with consumers. If sales volume does not increase, manufacturers will not upgrade production or investment, and technology emissions will not meet the standards. Unqualified emissions will bring great trouble to consumers, such as the annual inspection in the future. Consumers don't want to see or affect sales, which is a vicious circle.

Both gasoline and diesel oil are extracted from petroleum, which is a scarce resource. Diesel oil is mostly used in large machinery and belongs to strategic resources. So it is difficult for them to popularize family cars to a great extent. Now gasoline is gradually decreasing, not to mention diesel. The comprehensive promotion of ethanol gasoline this year is a good example.