Auto Home Alternative Test] When encountering an emergency, the reaction of ordinary people is to slam on the brakes, have you ever thought, if there is a front wheel air pressure is insufficient, then what will be the result of emergency braking? Will the braking distance be extended? Is there any change in body posture? These issues are related to daily driving safety, we have done a simulation experiment, hope to show the results as intuitive as possible, I believe you will be very interested.

• Test car: 2012 Dongfeng Citroën Sega 2.0 Automatic
• Why choose it?

The size of the car belongs to the compact category and the driving method is front-wheel drive. This is representative of the most popular model category in the Chinese market today.

• Test site:Professional test site, dry asphalt road.
• The first group test: four tyres adjusted to 2.4Bar standard air pressure, brake performance test.

We pumped up the pressure of all four tyres to the manufacturer's standard value:2.4Bar, after which we performed 5 sets of full-force braking tests. This set of data serves as a standard value for comparison with the later test data. In order to avoid the effects of heat fade, a rest period of about 15 minutes was also reserved after each set of brake tests to allow the braking system to cool down properly before proceeding to the next set of tests.

The first group of five measured results were 39.41 metres, 39.95 metres, 39.89 metres, 40.34 metres and 40.17 metres, with an average result of 39.95 metres.The difference between the maximum value (40.34 metres) and the minimum value (39.41 metres) in the five results was 0.93 metres, with relatively small fluctuations, and the braking system played steadily, and we entered the braking test path with insufficient tyre pressure below.

We pumped up the pressure of all four tyres to the manufacturer's standard value:2.4Bar, after which we performed 5 sets of full-force braking tests. This set of data serves as a standard value for comparison with the later test data. In order to avoid the effects of heat fade, a rest period of about 15 minutes was also reserved after each set of brake tests to allow the braking system to cool down properly before proceeding to the next set of tests.

The first group of five measured results were 39.41 metres, 39.95 metres, 39.89 metres, 40.34 metres and 40.17 metres, with an average result of 39.95 metres.The difference between the maximum value (40.34 metres) and the minimum value (39.41 metres) in the five results was 0.93 metres, with relatively small fluctuations, and the braking system played steadily, and we entered the braking test path with insufficient tyre pressure below.