There is a paper on "Automobile and Accessories", "Design and Analysis of Automobile Fuel Tank", which says so. The space shape design of fuel tank has great freedom, good formability and low priority in the whole automobile design process. The shape is generally determined according to the clearance reserved for the assembly of surrounding parts. That is: what does the fuel tank look like? It's not the square, flat or barrel we thought of.
It may protrude here and sink there. It's like taking a piece of plasticine and grabbing it with your hand like this. The bottom may also be uneven. Therefore, the design that the oil at the bottom of the oil tank cannot be sucked away by the oil pump may still be relatively common.
There is a paper on internal combustion engines and their accessories. Analysis of Working Principle and Design Strategy of Automobile Fuel Gauge, which reads: There are 2 to 5 liters of oil at the bottom of the fuel tank, which is unusable oil. The fuel tank of our family car is relatively small, and the unusable oil is generally around 2L. That is to say: when the fuel gauge light is on, the car has removed this 2L oil, and there is still about 4 to 5L oil. So, can this oil support our car to the next gas station?
The downtown area is basically no problem.
If you are in the city, there is basically no problem. According to GB/T 5 1328-20 18 Urban Comprehensive Transportation System Planning Standard issued by the Ministry of Housing and Urban-Rural Development, the service radius of urban public filling stations is 1 to 2km. It is the linear distance between two gas stations, which is usually about 2 to 4 kilometers. Even if you don't consider the straight distance, you may have to take a detour. Generally speaking, in the city, you won't say 10km, and there is no gas station, which is unlikely. Therefore, as long as the fuel consumption per 100 kilometers is not 40L or 50L, the subgrade of 10km is sustainable.
Expressway is generally no problem, but there are special circumstances.
After talking about the situation in the city, let's talk about the expressway. The distance between high-speed gas stations actually depends on the distance between service areas. There is a paper "Research on the Design Scheme of Expressway Service Area" in Western Transportation Science and Technology, which contains a data: the average distance between the first-class and second-class expressway service areas is 50km.
The fuel gauge light is on. How much oil is left in the tank?
The oil gauge lamp we are talking about should be called "low oil alarm lamp" professionally. How much oil is left when the light is on? In fact, many models are marked in the user manual. As long as the fuel consumption of the car we drive is not particularly outrageous, 4 to 5 liters of oil, driving 50km at high speed, is basically ok. But on the highway, the probability of encountering some unexpected situations is actually very small. For example, several gas stations along the way can't refuel.
What if you can't stick to the gas station?
If the fuel gauge light is on, the gas station will really close as soon as you enter the first service area. Don't rush to the next service area at this time. Check the nearest high-speed toll station exit and the next service area on your mobile phone to see which one is closer. If the toll booth is close, go to the toll booth first. Because there are generally gas stations within 3 kilometers of the toll station, and there are few cases of closure, it may be a better choice.
Of course, if the car is completely out of gas, it will break down soon, so don't panic at this time. Drive into the emergency lane, flash the lights twice and put up a warning triangle. All the people in the car are evacuated to the outside of the guardrail, which is equivalent to the guardrail can help us block it. What if I hit it? Then contact the high-speed traffic police 12 122 to ensure the safety of people first. Don't stop in the middle of the road and wait there because there is no gas, that is, being "played billiards" by other cars.