[News-Oxcart Network]
A modified 600-horsepower RB26DETT engine, 100 km of fuel consumption is only 5L, can you believe this? I believe that many people have been blinded, how can a 600 horsepower engine be only 5L, not to mention a modified RB26DETT, impossible, absolutely impossible!
However, Japan's HKS released the "HKS Advance Heretage" statement in 2021, saying that many customers reacted that they have a lot of old cars that they want to treasure and have feelings, but they are worried about the age of the car and the modification can not meet the increasingly stringent emission standards, and eventually these old cars will become a pile of scrap iron that has no value. Therefore, HKS aims to make the customer's old car more attractive, more secure and longer to use, and has introduced the latest development technology, which will conduct in-depth research on how more old engines can obtain the high power and low fuel consumption performance of today's engines through modification, and provide customers with more advanced customized modification services so that these old cars can better stay with the owners.
As for how to achieve this? HKS also offers specific solutions, including five solutions to optimize intake efficiency, new turbochargers, continuously variable V camshafts, double injection and finally the secondary combustion chamber.
1: Optimize intake efficiency
How to improve the combustion efficiency of the engine, it is impossible not to mention the "intake efficiency". It's like we do aerobic exercise to burn fat to achieve weight loss, and you can only get better combustion if you breathe in smoothly. And the RB26 is an in-line six-cylinder engine, and the air intakes that are lined up will encounter problems such as unbalanced intake and excessive intake temperatures.
Therefore, HKS optimized the intake manifold, after the air enters the intake manifold from the throttle, the height of the intake pipe gradually shrinks and gradually widens, at this time the air accumulated at the throttle can quickly enter the nearby cylinder, and the remaining air is faster through the tightened intake manifold to make the air flow faster, and can also quickly enter the distant cylinder. And this optimized intake manifold is also made of carbon fiber, which is not only lighter in weight but also smoother inside, which can reduce the friction of air on the inner wall to generate more heat, affecting the intake air temperature.
Optimized carbon fiber intake manifold
Simulated test diagram of the intake manifold
Of course, in addition to the newly developed intake manifold, HKS is also developing a new intake line to increase the intake efficiency by means of a gentler line and optimized intake filter and inlet, while also better reducing the intake temperature to help the engine achieve better combustion efficiency.
Intake lines under development
2: New turbocharger
When it comes to turbochargers, I believe many people will think of replacing ball bearings to improve response speed, but this is too simple for HKS, and the problem they have to solve is how to make the turbocharger have a better layout. Because our common turbochargers are horizontal layout, so the surrounding pipelines have a bend angle of nearly 90 degrees to link, the main problem is to affect the turbine response speed, but also lead to the intake, exhaust pipeline can not achieve maximum work efficiency.
The original turbine must be in a horizontal position due to bearing lubrication problems
Therefore, the new turbocharger developed by HKS can be installed at any angle, so that the piping position around the turbine is more reasonable, which improves the turbine response speed, and the efficiency of the intake and exhaust piping is also greatly improved. At the same time, HKS has also developed a turbo speed sensor to electronically control the turbine pressure relief valve, etc., the main purpose is to maximize the response speed of the turbine and improve the efficiency of the engine.
HKS's newly opened turbochargers are not limited by angle
In order to improve the turbine response speed, HKS has also done enough work on the exhaust manifold. In addition to the special heat resistance treatment inside and outside the exhaust manifold, it can effectively reduce heat loss and make the high-temperature exhaust gas flow faster, making the turbocharger delay lower and the response faster. Not only that, HKS also reserved a vacuum layer between the inner and outer walls, and poured nitrogen into the vacuum layer for heat insulation to further improve the thermal efficiency.
Internal structure of the exhaust manifold
3: Continuously variable phase V camshaft
Inside the engine, in order to achieve the orderly work of intake and exhaust, camshafts are designed to control the opening and closing of the valves. HkS's unique continuous phase variable "V cam" can not only provide the best power and torque characteristics according to the engine speed and load, but also set on the air intake side, so that the two valves of the suction and exhaust can be timed and continuously changed, so as to obtain a more ideal combustion efficiency, thereby reducing fuel consumption.
4: Double jet
Double injection is actually very easy to understand, that is, from the original one injector per cylinder to two. However, the main purpose of increasing the fuel injector is not to increase the amount of fuel injected, but to improve the fuel atomization effect. Because in many modification schemes, if you want to get a lot of power, you will choose a high-pressure injector, but this is not ideal for reducing fuel consumption, and after the fuel is injected, because the pressure is too large, the injection range will become larger, and it is likely to be left on the inner wall of the intake tract, resulting in fuel not being fully utilized.
The role of double injection is to reduce the pressure of each injector nozzle, so that the fuel atomization is better, which can reduce the possibility of fuel injection remaining in the inner wall of the intake tract; thereby improving the combustion efficiency of the engine.
5: Secondary combustion chamber
When it comes to the "secondary combustion chamber", it is estimated that many people are more ignorant, there is a combustion chamber in the engine, how can there be an additional sub-combustion chamber? In fact, the concept of the auxiliary combustion chamber has been applied as early as the MC20 sports car unveiled by Maserati at the Beijing Motor Show in 2020, of which the Nongna Poseidon 3.0L V6 twin-turbocharged engine has a "secondary combustion chamber" to provide combustion efficiency.
And this sub-combustion chamber is also F1, WEC and other top racing cars are used in the technology, its main feature is to design a separate combustion chamber outside the conventional combustion chamber, that is, directly below the spark plug, when the injected fuel into the cylinder, part of the mixed fuel into the sub-combustion chamber, at this time the spark plug will ignite the mixed gas of the secondary combustion chamber, the ignited flame will enter the cylinder through the hole reserved in the secondary combustion chamber, and finally ignite the mixture in the cylinder. The purpose of this complex set of tasks is to improve combustion efficiency. After a series of upgrades, HKS modified the design of the spark plug, enclosing the peripheral of the spark plug electrode to form a secondary combustion chamber, and reserved the hole position for the burning flame to enter the cylinder.
However, it seems simple, but in fact, HKS has been developing this engine for more than 2 years, and the material selection of the newly designed spark plug, the design of the hole position, the design of the interior space of the auxiliary combustion chamber, etc. are one problem after another.
HKS has a new design with spark plugs for the secondary combustion chamber
Schematic of flame jet after combustion in the secondary combustion chamber
The performance of the spark plug with the auxiliary combustion chamber is better compared to the ordinary spark plug
Editor's summary: In order to get more horsepower, we had to increase the engine displacement, so we had V6, V8, V12 and other large-displacement engines to enjoy the happiness brought by power. But today, with the increasingly strict emission standards, the large-displacement engine has gradually fallen out of favor, and it is no longer suitable for the current car environment, forming an antithesis with environmental protection. Not to mention the sudden emergence of electric vehicles, there is no emission trouble can easily beat the performance of large-displacement engines, these problems have led to the loneliness of large-displacement engines, which is an indisputable fact.
But for those who are educated by fuel vehicles, the large displacement engine brings them too many memories, they enjoy the feeling of pushing back brought by the fuel explosion, and also enjoy the auditory feast brought by the high-pitched exhaust sound. And these are all things that electric vehicles can't give you, so how to keep these large-displacement engines by your side, how to make it more environmentally friendly and keep up with this era is particularly important.
In order to allow you to enjoy more time with your beloved high-displacement engine, HKS is providing you with a new option through a technological retrofit that will be as simple and fast as possible. Originally, HKS would continue to increase fuel consumption in order to obtain high horsepower, but now the products developed are to ensure high horsepower and reduce fuel consumption at the same time, which is really cool. What are you still thinking, don't hurry to get a big displacement back! Try your 100 km fuel consumption to 5L!