2017年7月17日 · Hi, I'm currently experiencing a problem with the Valvetronic system on my BMW with N52 engine and it would be great if I could get some advice. So I've removed the Valve cover to inspect Valvetronic system. So far, I've bench tested the Valvetronic motor and put DC current from a battery to it and the motor seems to be working as it should.

Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, and continuous, which is …

这套系统由发动机管理系统控制，主要控制气门行程的特性曲线，通过当前驾驶员加速踏板的负荷要求，根据气缸需要额定进气量，目前环境温度，发动机水温，机油温度等信号，换算为气门行程和气门正时，从而得到进气门的关闭时刻，驱动伺服电机。 其中，为了实现最佳燃烧效果所需的残余气体量，也会对排气凸轮轴（排气VANOS）的相位进行调节，实现内部EGR循环，提高燃油经济性。 虽然 Valvetronic 系统可以通过进气门和偏心轴传感器精确控制进气量，但宝马从可靠 …

2022年12月16日 · Engineers at BMW have come up with an ingenious idea of regulating how much air enters their naturally aspirated engines by electronically adjusting valve lift timing. The Valvetronic system is made of several elements: Here’s how all of this works. The Valvetronic motor, worm gear, and eccentric shaft sit above the camshafts in the cylinder head.

2023年10月1日 · BMW Fault Code Lookup - BMWFaultCodes Check the eccentric shaft sensor connector on both banks for oil contamination. Remove valve cover and check for excessive valvetronic gear wear causing "tight" warning

The Valvetronic system is a BMW variable valve lift system [1] which, in combination with VANOS, allows infinite adjustment of the intake valve timing and lift. [ 2 ] [ 3 ] The system claims to improve fuel economy and emissions, and negates the need for a throttle body in regular use.

2013年12月11日 · ISTA/D is the dealership diagnostics program used by BMW, it reads the error codes and gives you repair plans based on those codes. 2) Looks correct to me, although, it's not required but you may want to replace the bolts that hold the valvetronic motor in place as well.

2014年12月11日 · VVT是Variable Valve Timing（可变气门正时）的简写，这完全是另一个系统，用液压驱动的，上世纪就在N多发动机上都有应用，属于老技术了；而Valvetronic是可变气门升程，高大上技术，简称应该是VVL（Variable Valve Lift），因此应该说“VVL系统”和“VVL电机”才对。

BMW VANOS（连续可变气门定时）和Valetronic（连续可变气门升程）共同组成了电子气门控制系统，这几乎是一套完美的发动机进气控制系统。 发动机的负荷完全通过 电子气门 控制，通过调节气门定时和升程为发动机分配近乎完全匹配的进气量。

2022年12月13日 · The P1055 code is a BMW-specific Diagnostic Trouble Code (DTC) related to the Valvetronic system found on most modern BMW engines. The Valvetronic system is BMW’s version of a Variable Valve Lift (VVL) system and enables infinite adjustments of the intake valve.