1 the ECU board computer
Introduction:
is actually trip computer ECU, typically for EFI vehicle. Generally used to control the fuel injection amount, the mixture ratio and the like. Briefly, ECU by a microcomputer and peripheral circuits. The microcomputer is integrated on a single chip microprocessor unit (CPU), memory, and input / output interfaces. The main part of the ECU is a microcomputer, the core member and a CPU. ECU input signal into a digital form, comparing processing based on the stored reference data, to calculate the output value, then power amplified output signal to control the plurality of servo adjustment elements, such as relays and switches. Accordingly, the ECU is actually a ldquo; electronic control unit rdquo; (Electronic Control Unit), which is composed of three parts, an input circuit, a microcomputer, and an output circuit. The input circuit receives a signal of the sensor and other input devices, signal filtering and amplification processing, and then converted into a constant volt input level. Existing analog signal to the ECU from a sensor signal input circuit has a digital signal input circuit A / D converter can convert the analog signal into a digital signal, and then transmitted to the microcomputer. The above-described microcomputer already preprocessed signal arithmetic processing, and the processed data to an output circuit. The output circuit amplifying the power of the digital information, but also reduced to some analog signal, so the work of adjusting the servo driven member is charged.
Function:
trip computer is a high-end electronics technology, using high-end technology to read vehicle data. The system will monitor the operating conditions of the engine at any time whether excessive vehicle exhaust, once exceeded, a warning will be issued immediately. When the system fails, the failure (MIL) lamp or check engine (Check Engine) warning light, while the powertrain control module (PCM) fault information stored in the memory, by a certain program may beFault code read from the PCM. The prompt fault code, maintenance personnel can quickly and accurately determine the nature and location of the fault.
Applications:
at present in a number of high-class cars, not only on engine applications ECU, ECU can find traces in many other places, such as the ABS system, four wheel drive system, electronically controlled automatic transmission, active suspension systems, air bag system, the multi-adjustable electric seat so arranged the respective ECU. With the increase of electronic automated car, ECU growing, increasingly complex circuit, in order to simplify the circuit and reduce the cost, the transfer of information between the plurality of ECU is necessary to use a technique called multiplexing communication network on an automobile, the vehicle ECU forming a network system, i.e. cAN data bus.
However, a number of models for human-computer dialogue in a more detailed, using the ECU, such as outside temperature, current speed instantaneous fuel consumption, average driving speed, average fuel consumption, remaining fuel driving range, simple direction guides data set is displayed in the display, which has become our usual table in the configuration mentioned in the trip computer.