The cold morning wind whistled past Yang Jie's ears. He glanced outside the car and saw the gray sand quickly moving backwards.
The limbs holding up the roof of the car were slightly weak. Such an exciting scene made Yang Jie's heart beat faster involuntarily.
Withdrawing his gaze, Yang Jie continued to crawl slowly along the front hood, climbed to the edge of the hood, stretched out his feet and carefully stepped on the bumper of the off-road vehicle, steadying his center of gravity, and patted the hood to signal the bear to open it.
"Click."
A subtle locking sound came from inside the hood.
Yang Jie held on to the heavy iron plate and lifted it up, revealing everything under the hood.
Looking at the familiar mechanical structure, Yang Jie threw away the fear in his heart and leaned down to look for the source of the fault intently.
Generally speaking, there are roughly three reasons for fires in car hoods: engine failure, electrical short circuit, or oil circuit rupture.
But there is only one place that can produce a popping sound during acceleration and cause the engine to lose power - the engine.
Thinking of this, Yang Jie turned his attention to the dusty engine.
This is a classic V-shaped eight-cylinder engine with stable performance and strong power. The only drawback is high fuel consumption. It is one of the more common engines on heavy-duty off-road vehicles.
"A loud noise...a deflagration...the most likely scenario is a cylinder explosion."
Yang Jie focused his attention on the several cylinders arranged in the engine, and soon made a discovery:
A small crack as long as a finger.
"call."
Yang Jie let out a long sigh of relief.
When he first started working, he also spent a few months in the power laboratory. The most common thing he did was to help his master, a middle-aged man in his forties who was balding.
Researching engines always involves a lot of extreme load tests, so cylinder ruptures happen from time to time, which is not uncommon for Yang Jie.
What do masters usually do when encountering this kind of situation?
Yang Jie looked at the engine, biting his lip and trying to remember.
In most cases, the most common solution is to replace the cylinder. But in such a bumpy environment, dismantling the engine is obviously not a good option.
Besides, he had never heard of anyone carrying a set of spare engine parts in their car.
In addition to replacing the cylinder body, the only remaining method, which is also the most common method in small and medium-sized auto repair shops, is to cover it with polymer glue.
The cracked gap is very small, and it may be used without wrapping fabric after applying glue, making repairs relatively simple.
After confirming the repair plan, Yang Jie became more confident. He closed the hood, climbed back on the roof of the car, and got into the car along the sunroof.
"I found the problem! The engine exploded!"
Gou Xiong's reproachful words stopped on his lips. He was worried and a little surprised, and glanced at Yang Jie with a complicated expression.
"Can it be fixed?"
"Need tools."
"Switchblade!"
Gou Xiong glanced at the young man who was reloading in the rearview mirror and shouted:
"Give Yang Jie the toolbox that Mike left behind!"
A huge toolbox was stuffed into Yang Jie's arms, and Gou Xiong continued:
"This is the toolbox of our previous carmaker. See if there is anything you want."
Yang Jie nodded and opened the tool box.
The instruments in the tool box are arranged quite neatly, stacked one by one on each partition. Although all the tools have signs of use, there is no trace of dirt at all. It can be seen that the previous owner of the tool box took great care of it. cherish.
Wrenches, pliers, screwdrivers...
Yang Jie rummaged through the tools in the box bit by bit and slowly stopped.
No polymer adhesive!
"Bear, that's all, is there nothing else?"
"No!"
Gou Xiong controlled the steering wheel, carefully avoiding a raised rock, and shook his head to kill Yang Jie's last chance:
"Everything that was left behind when Mike died is here."
this……
Yang Jie was stunned by Gou Xiong's answer.
How to repair this crack without polymer adhesive?
Yang Jie continued to look through the tools in the box, his brain working rapidly, looking for ways to replace the polymer adhesive.
If other means are used to cover the gap, the material will not be able to withstand the high temperature and high pressure environment inside the cylinder. In other words, once the engine is running, the cracks should be broken or broken, and repairing them will be in vain.
Suddenly, his hand stopped and his eyes fell on the welding gun at the bottom.
Use a welding gun?
Yang Jie was startled by his crazy idea.
The strength of the welded material is definitely sufficient, but if everything only needs to be considered so simple, then there is no need for professional engineers.
Not to mention whether the high temperature of the welding gun will cause changes in the mechanical properties of the cylinder's metal, and whether you can weld correctly in a bumpy environment. The deformation of the cylinder caused by the high temperature alone is enough to completely scrap the entire engine.
The car engine is a highly precise machine, so the requirements for body size accuracy are extremely strict.
Taking a relatively simple four-cylinder engine as an example, the 100mm error on the end face cannot exceed 0.15mm, and the floating error requirement for each bearing hole is as small as ±0.02mm.
0.02mm, what is the concept? One-fourth the diameter of a human hair.
The V8 engine, which is much more complex than the four-cylinder engine, has higher requirements, and the high temperature during welding can easily cause the cylinder to deform, resulting in errors that far exceed the standard range.
By then, abnormal noise from the engine will be a trivial matter, and it is very possible for the crank rod to break.
But……
Yang Jie glanced at the other tools in the tool box again.
I have no better choice.
He decisively grabbed the welding gun, installed the welding wire, and connected the battery.
Looking at the welding gun in his hand, he couldn't help but smile bitterly to himself.
If I dare to do this in the laboratory, I'm afraid I will be scolded by my master.
Holding the battery and welding gun in his hands, Yang Jie glanced at the dashboard and asked Gou Xiong:
"How far can we drive?"
"Twelve kilometers."
In other words, I still have twelve minutes at most.
There is not enough time.
"Give me a pair of sunglasses."
The welder's mask needs to be held up with the other hand. After a while, I have to work on the front of a high-speed car. It is too dangerous to have my hands hanging in the air. Although the protection effect of sunglasses is not as good as the mask, it can be a substitute.
"Xiong, please report the remaining mileage to me as soon as possible."
Gou Xiong nodded, took off the sunglasses from his collar, handed them to Yang Jie, and then squeezed the young man's shoulders hard.
"Be careful."
Yang Jie nodded, then climbed up the sunroof again and returned to the front of the car.
The first step in welding is to ensure that the surface of the welding material is clean.
Opening the hood, Yang Jie used the cuffs of his clothes to wipe off the dust and oil on the cylinder, and briefly inspected the damaged gaps.
"Um?"
Seeing the torn section of the gap, Yang Jie was suddenly startled. He frowned and leaned down to observe carefully.
