Pre-export HS code verification steps

List of the contents of this article:

• 1,Pre-export HS code verification steps What does car engine DVVT and CVVT mean
• 2, mainSeveral engine-specific technologies
• 3, MR16DDT unique technology
• 4, Technical characteristics of LTG engine

What does car engine DVVT and CVVT mean

1. CVVT is an abbreviation of Continuous Variable Valve Timing in English, which is continuous in Chinese. Variable valve timing mechanism is one of the many variable valve timing technologies that have been gradually applied to modern cars in recent years.

2. What do DVVT and CVVT of automobile engines mean? Engine DVVT is a double variable valve timing technology, and CVVT is a continuous variable valve timing technology. What is valve timing? The meaning of timing can be understood as "acting according to the prescribed timing". For example, if the engine is a little on fire, it is to let the spark plug ignite at the specified time.

3. DVVT: It refers to the double variable valve timing, and its valve opening phase has two moments. CVVT: It is a continuously variable valve timing, which can be continuously adjusted between the two limit phases of the allowed valve timing. First of all, VVT refers to the variable valve timing.

4. DVVT: refers to the time of the double variable valve, and there are two moments when the valve opens the phase. CVVT: It is a continuous variable valve timing, and it can continuously adjust between two extreme phases in the allowed gas distribution phase. First of all, VVT refers to the variable valve timing.

main Several engine-specific technologies are required

CVTS-II is the engine technology promoted by Mark 408. CVTS technology is similar, which can not only ensure low-speed high torque, but also obtain high-speed high-power. The technology adopted by VTCS is controlled by the throttle gate, so that the engine forms different intake vortexes under different working conditions, so that the oil mist and air can be better mixed in order to make the combustion more fully.

VVT (VariableValve Timing) - Variable valve timing technology, common types include VVT-i, VTEC, CVVT, etc. ●VVT-i: VVT-i system is the English abbreviation of Toyota's intelligent variable valve timing system. Technical highlights: increase torque in all speed ranges and improve fuel economy.

"In-line" can be represented by L, followed by the number of cylinders to be the engine code. There are mainly LLLL6 engines on modern cars.

Common gasoline engines and diesel engines belong to the resurrected internal combustion engine, which converts the chemical energy of the fuel into the mechanical energy of the piston movement and outputs power to the outside. The gasoline engine has high speed, small mass, low noise, easy to start, and low manufacturing cost; the diesel engine has a large compression ratio, high thermal efficiency, and better economic performance and emission performance than gasoline engine.

Inlet and exhaust control and fuel injection/ignition technology. On the VQ engine, you can find almost all the current intake and exhaust control technologies. The combination of these technologies allows the VQ engine to get enough fresh air at any speed, and the combustion efficiency at each speed stage is very high. Score.

The difference between the DVVT engine and the CVVT engine is that CVVT technology uses an electronic hydraulic system to continuously control the time when the cam opens the intake valve. DVVT technology is a variable timing technology that can control the intake and exhaust valve at the same time, so that the gasoline and air in the engine combustion chamber The mixture reaches the most appropriate air-fuel ratio.

MR16DDT-specific technology

MR16DDT engine-specific technology MR16DDT adopts inlet and exhaust variable valve timing technology, that is, dual VVT. Moreover, the MR16DDT adopts Vane-Type, which is more accurate in valve timing control.

The model of [direct injection turbocharged engine] produced by Nissan itself is [MR16DDT]. It is equipped with dual C-VTC continuously variable valve timing intelligent control system, intelligent turbocharging system and DIG in-cylinder direct injection system, as well as three innovative low-friction technologies and comprehensively optimized engine cooling technology.

The engine of the MR16DDT engine is good. It is directly sprayed into the cylinder, which is a relatively advanced technology of the engine. Many cars adopt this technology engine, which has strong power and low fuel consumption.

First of all, the new 5T engine. This model code-named MR15DDT has never appeared in the Nissan system, where "15" represents an engine displacement of 5L, and "DDT" means that the new engine will adopt double overhead camshafts, in-cylinder direct injection and turbocharging.

Yes, in theory, cars can be modified in any form, provided that there are sufficient funds and technical equipment support. Even if you install an airplane engine, you can do it. And someone has already done so.

LTG engine technical features

The main body is different LSY: also known as Ecotec is a four-cylinder engine series with the world's top level created by General Motors high-tech.LTG: Also known as ECOTEC LLU engine, it is a 6L inline four-cylinder multi-point electric injection turbocharged engine.

In-cylinder direct injection technology is adopted, which is conducive to ignition and combustion control. Combined with high-pressure direct injection technology, it can improve the atomization effect of fuel, improve fuel combustion efficiency and engine output power, and significantly reduce the emission of harmful substances in exhaust gas.

LTG engine features This LTG engine also has the characteristics of low noise. In terms of security, Cadillac xts has a series of safety warning technologies based on sensors such as surveillance cameras, ultrasound and short-range radar, which is officially called the ESS enhanced security strategy.