Chapter 105 Subversive design, becoming an irreplaceable classic
“The so-called light wheeled high-mobility vehicles or all-terrain wheeled off-road vehicles equipped in most countries generally refer to Jeeps. "
"Be it the German Mercedes-Benz G series, our BJ212, or the American M151 military vehicle, they are all very similar."
"Jeeps cannot be used due to their size. The main purpose of adding a large number of weapons is to carry people. Even the derivative version has a relatively small carrying capacity. "
"With the changes in the shape of war and the upgrade of weapons, all countries in the world actually need one. An off-road vehicle with bigger size, more power and better performance.”
Jiang Hui plans to finalize some major plans related to the Hummer project today.
Anyway, Zhu Jiansheng has been discussing it within the department for a week, and he put together a plan over the weekend, which is considered reasonable.
“Cars in the general sense only emphasize two factors, people and things, but our car is actually completely the opposite. Carrying things is the first, and carrying people is the second. You two, and the items carried here are not ordinary items, but authentic military weapons and military supplies. "
"At this time, the first thing we need to consider is the layout of the engine."
For military vehicles, appearance is definitely not the first thing to consider, so Jiang Hui has not yet provided Zhu Jiansheng with an appearance picture of the Hummer.
The chassis and power system are the key to the problem. Without determining these things, it will be meaningless to talk about the appearance.
“Our BJ212 has a front engine. What do you mean, this car is not suitable for a front engine?”
Zhu Jiansheng is not stupid, he knew it from Jiang Hui’s tone. His plan is definitely special.
“Yes, the engine of this all-terrain wheeled off-road vehicle is not suitable for being placed on the front of the vehicle, which can easily lead to an unstable center of gravity and reduced maneuverability.”
Jiang Hui just finished speaking, Zhu Jiansheng immediately retorted: "The engine is not placed in the front. If it is placed at the rear, although it can reduce the size of the front of the vehicle, it will not be convenient for the vehicle to install weapons and equipment or load cargo. At the same time, the heat dissipation system is not easy to arrange."
In terms of professional knowledge, Zhu Jiansheng is actually no worse than Jiang Hui.
I just can't compare to the well-informed Jiang Hui in terms of divergent thinking.
Even if it were to draw a specific part, Zhu Jiansheng might be faster.
“Yes, the rear-mounted four-wheel drive form is not suitable for it, so we can consider placing the engine at the rear of the front of the car. This layout is generally called a front-mid-mounted four-wheel drive, and Place the transmission and transfer case in the middle."
Jiang Hui did not argue with his father-in-law, but took advantage of the situation and proposed the mid-engine plan.
"The mid-mounted four-wheel drive structure does have many advantages. After all, the weight distribution of the front and rear axles is very good, and it is very convenient to arrange transmission components. But the shortcomings are also obvious, right?"
Zhu Jiansheng raised his glass and took a sip. After taking a sip, he continued: "The huge size of the mid-mounted engine and transmission components takes up a lot of space in the cabin, making the effective use space of the passengers smaller."
"Yes, but I think for this car It's not a big problem, because in combat, soldiers don't have that much time to appreciate the distance between their thighs and the cockpit, or they have to shake hands with the person on the co-pilot. For them, "The most important thing is a car that can improve the survival rate."
Jiang Hui filled his father-in-law's glass while expressing his opinion.
"Dad, our multi-functional all-terrain wheeled off-road vehicle was born for combat. Its positioning is different from jeeps such as the BJ212."
"According to my vision, it can climb 60% of the slope and pass 40% of the slope. After adding a wading hose, it can easily cross 1.5 meters of water. This performance alone requires a chassis layout that is not an ordinary layout. It’s satisfying.”
Hearing what Jiang Hui said, Zhu Jiansheng took a breath.
The indicator is set so high?
Will you dig a big hole for yourself by then?
The military representative was happy, but he would feel uncomfortable if he couldn't do it. "Okay, the engine will be front-mid mounted as you said."
"But what about other layouts of the chassis?"
Zhu Jiansheng is still very confident in Jiang Hui's design capabilities. Since he has chosen to listen to his suggestions, he might as well listen more.
“In the chassis layout of off-road vehicles, in addition to the leaf spring structure of the BJ212, there is also a very classic structural front and rear integral axle suspension.”
“The front and rear integral axle suspension is also used We call it truck suspension. Its advantage is that its load-bearing capacity is very good, and the tension and compression distance of the suspension is relatively large. Therefore, in many harsh terrains, the four wheels of the vehicle can effectively ground to improve passing performance. "< br>
"But our car is not going to use an integral bridge structure."
When Jiang Hui said this, Zhu Jiansheng couldn't help but frowned and asked, "Why?"
In his words It seems that all-terrain wheeled off-road vehicles must pay attention to high trafficability, right?
“The overall bridge has good load-bearing capacity and off-road capability, but it will lead to a decrease in vehicle handling performance and is inconvenient for high-speed driving.”
“Our new generation of military off-road vehicles must It has high maneuverability. For civilian vehicles, high maneuverability may refer to very good off-road capabilities.”
"But in terms of military use, I think high mobility refers to various indicators such as flexibility, passability, marching speed, etc. After all, the shorter the time to reach the target on the battlefield, the greater the advantage."
< br>Although Zhu Jiansheng did not fully agree with Jiang Hui's explanation, he knew that what he said was not unreasonable.
Whether the front-line users care most about these performances needs further confirmation.
“What about the suspension?”
“You don’t use an integral axle, and it seems you don’t plan to use the BJ212’s leaf spring suspension, so how do you plan to design it?”
Although most consumers in China in later generations do not care so much about chassis performance such as suspension, as an expert in the automotive industry, it is impossible for Zhu Jiansheng not to care about suspension.
To a certain extent, if the suspension is not designed well, then the car will be a failure.
“I plan to equip this car with a four-wheel independent suspension to ensure that the vehicle can maintain very good stability when running at high speeds, making it a veritable high-mobility all-terrain wheeled off-road vehicle.”< br>
Hearing what Jiang Hui said, Zhu Jiansheng’s brows wrinkled again.
A military all-terrain off-road vehicle actually uses independent suspension?
It sounds unreliable!
We can’t just make it an independent suspension in order to take into account the needs of civilians in the future, right?
Jiang Hui felt Zhu Jiansheng's doubts and was ready to explain it to him.
On this issue, it is estimated that representatives from the Fifth Machinery Department and the military will also have questions after the project application letter is submitted.
(End of this chapter)