Many companies have mentioned D-4S direct injection technology in their engines, but I don't know what it is. Please answer.
347 horsepower, 46.9 kilograms of torque, 1 1.2 kilometers per liter average fuel consumption performance, strong power and low fuel consumption that common sense can not take into account, brand-new Lexus GS460, do it!
Toughness to break through contradictions
The performance positioning of GS car in Lexus brand is very clear. Whether it is a 6-cylinder engine or an 8-cylinder engine, it attracts consumers' attention with its bright dynamic performance. When Lexus GS went on the market in 2005, the newly-built 3GR-FSE 3.0 V6 engine adopted D-4 in-cylinder direct injection fuel supply technology, dual VVT-i dual continuous variable valve timing and ACIS variable intake manifold, reaching the level of 248 horsepower. The engine of GS350 adopts a new generation of D-4S direct injection technology. Compared with the original D-4 in-cylinder direct injection, D4-S installed an additional nozzle in the intake manifold, which made the overall output smoother and more intelligent. It also allows GS350 horsepower to break through 300 horsepower in one fell swoop, and the torque is also enlarged to the level of 37.9kg·m, which is the pride of competitors at the same level.
With the latest 4.6-liter engine, GS has 347 horsepower and an output of 46.9 kg/m.
But in the world of 8-cylinder engine, the GS430 with 3UZ-FE engine has a torque of 42.3kg·m, but its output is only 280 horses. Compared with 245 horses of GS300, it can't reflect the advantages of V8 engine, which makes consumers flinch. After the launch of GS350, there are even more contradictions.
The contradiction is about to be solved, because in the 2008 GS460, Lexus engineers replaced the latest 4.6-liter V8 engine for GS, making the brand-new GS460 have 347 horsepower and 46.9 kg m output.
Engine technology set
Such excellent performance is the crystallization of Lexus' excellent engine technology.
With the change of the world environment, consumers not only have an infinite desire for powerful power, but also have an increasing demand for environmental protection and low fuel consumption. Lexus engineers know that the V8 engine products manufactured by technology in the 20th century can no longer meet the needs of the new century. Therefore, Lexus engineers aim at powerful power and environmental protection performance, and combine all the latest engine technologies of Lexus to develop a brand-new UR engine series, hoping to have top performance while taking into account fuel consumption and emission pollution. The 1UR-FSE engine on GS460 is the crystallization of Lexus engine technology.
The 1UR-FSE engine on GS460 is the crystallization of Lexus engine technology. With comprehensive performance, fuel economy and environmental protection, this engine is a classic.
1UR-FSE engine reflects Lexus' commitment to environmental protection in material selection. This brand-new V8 engine is all made of aluminum alloy. Starting from the engine block and cylinder head, aluminum alloy is used to replace the traditional cast iron material, and the cylinder head is made of magnesium-aluminum alloy to meet the demand of low fuel consumption. In terms of design, Lexus engineers also increased the compression ratio of this V8 engine from the original 10.5: 1 to 1 1.8: 1, so as to have higher thermal efficiency.
After the infrastructure is completed, many subsystems are also in place. The first is the exclusive dual VVT-i dual continuous variable valve timing control. Double continuous variable valve timing control can control the opening and closing time of intake valve and exhaust valve according to different working conditions, so that oil and gas can obtain the best combustion state in the combustion chamber. The design of stepless adjustment has been matched with the existing Lexus models. On 1UR-FSE, Lexus engineers introduced the latest VVT iE technology to make the valve control more accurate.
VVT-iE electronically controlled variable valve timing
On the intake valve that needs more precise control, Lexus engineers replaced the original hydraulic VVT-i mechanism with an electronic motor mechanism. VVT-iE system, which no longer relies on hydraulic control, not only effectively reduces the increased load and fuel consumption of the engine during operation through electronic control system and precision motor, but also can intervene in operation at a lower speed, and the control action is more detailed and subtle, which greatly improves the control of the intake valve compared with the previous generation products. In order to control the combustion and emission of exhaust gas more accurately, Lexus engineers still loaded the original hydraulic VVT-i structure for this V8 engine at the exhaust end, which is one of the keys to greatly reduce the fuel consumption and emission of the engine and give consideration to the performance output.
The 1UR-FSE engine of GS460, with double continuous variable valve timing technology, is one of the keys to greatly reduce fuel consumption and emissions while giving consideration to performance output.
D-4S: A new fuel supply system combining intake manifold injection and direct injection in cylinder.
In addition to controlling the variable valve timing more accurately, the accuracy of engine fuel supply is naturally another key point to improve engine performance. In-cylinder direct injection fuel supply technology is a trend in recent years Using in-cylinder direct injection technology can greatly improve the sensitivity of engine reaction, and then realize the pleasure of arbitrary acceleration. Lexus engineers have redesigned the fuel supply system of the 1UR-FSE engine. Replace the original D-4 in-cylinder direct injection technology with a brand-new D-4S oil supply technology. The full name of D-4S is fuel multi-injection technology. Different from the original D-4 with one direct injection nozzle per cylinder, D-4S is also equipped with a nozzle at the intake manifold, which integrates the design of multi-point injection engine and D-4 direct injection engine, making the fuel supply system of 1UR-FSE a precise system with two injectors per cylinder and *** 16 injectors.
When the engine is cold, low load and low speed, the V8 engine will supply oil through the manifold nozzle, and the air will naturally mix to achieve good combustion effect and fuel economy. With the increase of engine speed, the engine's demand for oil supply further increases. In order to make the engine reach the maximum output in an instant, the engine computer will replenish oil from the fuel nozzle in the cylinder in time according to the combustion chamber monitored by the sensor to complete the acceleration effect of violent explosion.
The D-4S fuel multi-injection technology instead of D-4 is also the key to greatly improve the performance of GS460.
When the engine is running at full load and high speed, power output becomes the main demand. At this time, 1UR-FSE will stop the manifold fuel supply and provide a large amount of fuel supply for the most efficient in-cylinder injector to achieve the best power output.
Performance in the new century
In addition to dual VVT-i and D-4S fuel supply systems, Lexus engine engineers also installed ACIS variable intake manifold and ETCS-i electronic throttle control system for 1UR-FSE, and fully applied excellent and advanced electronic control technology to this engine, thus creating a brand-new performance horse. Coupled with Lexus' unique 8-speed automatic transmission system, dense upshift transmission ratio and precise shift logic, after careful adjustment and matching, GS460 has an output of 347 horsepower and 46.9 kg/m. In the test of Energy Bureau of the Ministry of Economic Affairs, it can still maintain the intensity of high-speed cruising and urban driving of 65,438+05.6 km per liter, which is equivalent to the fuel consumption level of V6 engines in Germany. All-round consideration makes the new Lexus GS460 a performance powerhouse with both performance and comfort.