What does pcm mean in the car?
the electronic control system of the engine is called ECU, and in Ford it is called PCM and TCM, in which PCM is dedicated to the control of power output and TCM is used for the conversion control of automatic gearbox. PCM will receive sensor signals, and control the fuel supply, air distribution (electronic throttle), timing of fuel injection and ignition, adjustment of intake pressure, and determine the compensation control coefficient of the engine according to temperature, load, knock and combustion condition, etc. The electronic control unit (ECU) is the core control element of the electronically controlled fuel injection system, which is equivalent to the Cpu of your computer. Commonly used when changing cars. ElectronicContractManufacturer? It means "contract electronic product manufacturer". PulseCodeModulation is the abbreviation of Pulse Code Modulation, which is one of the coding methods of digital communication. Its main coding process is to sample analog signals such as voice and image at regular intervals and make them discrete. At the same time, the sampled values are rounded to integer quantization according to hierarchical units, and at the same time, the sampled values are represented by a set of binary codes. The biggest advantage of pulse code modulation is its good sound quality, and the biggest disadvantage is its large size. Our common AudioCD uses pulse code modulation, and the capacity of a CD can only hold 72 minutes of music information. To sum up, automobile pcm refers to the engine control module. pcm will receive sensor signals, control the fuel supply, air distribution, timing of fuel injection and ignition, adjustment of intake pressure through complicated calculation, and determine the compensation control coefficient of the engine according to temperature, load, knock and combustion conditions.