What is the car s trip computer and what is its function?

The driving computer is the statistics of the data of the car in the driving process, with real-time fuel consumption, comprehensive fuel consumption, remaining driving distance and other data statistics and displayed on the dashboard.

Electronic control unit ECU

Most of the modern car engines use electronic fuel injection systems, which have a control element called "ECU" that resembles a square box, ECU is called a computer, some people call it a microcomputer, and some people call it a microprocessor, so what is it actually a thing?

To put it simply, an ECU consists of a microcomputer and peripheral circuits. A microcomputer is a unit that integrates a microprocessor (CPU), memory, and input and output interfaces on a single chip. The main part of the ECU is the microcomputer, and the core part is to convert the input signal into digital form, compare and process according to the stored reference data, calculate the output value, and then the output signal is amplified by power to control several regulating servo elements, such as relays and switches.

Therefore, the ECU is actually an "electronic control unit", which is composed of three parts: input circuit, microcomputer and output circuit.

The input circuit receives the input signal from sensors and other devices, filters and amplifies the signal, and converts it to an input level of a certain volt. The signal sent from the sensor to the ECU input circuit has both analog and digital signals, and the analog-to-digital converter in the input circuit can convert the analog signal to a digital signal and then pass it to the microcomputer. The microcomputer calculates and processes the pre-processed signal and sends the processing data to the output circuit.

The output circuit amplifies the power of the digital information, and some of it is also restored to the analog signal, so that it drives the controlled regulating servo element to work.

At present, in some mid-to-high-end cars, ECU is not only used in the engine, but also in many other places. For example, the anti-lock braking system, 4-wheel drive system, electronically controlled automatic transmission, active suspension system, airbag system, and multi-directional adjustable electronically controlled seats are all equipped with their own ECUs. With the improvement of electronic automation of cars, ECUs will increase day by day, and the lines will become more and more complex.

In order to simplify the circuit and reduce costs, the information transmission between multiple ECUs on the car needs to use a technology called multiplexed communication network, which forms a network system of the ECU of the whole vehicle, that is, the CAN data bus.

The trip computer is a high-end electronic product that uses high-end technology to read car data。When the system fails, the MIL light or the CHECKENGINE warning light is on, and the powertrain control module (PCM) stores the fault information in the memory, and the fault code can be read out of the PCM through a certain program. According to the prompt of the fault code, the maintenance personnel can quickly and accurately determine the nature and location of the fault.

The vehicle model inspection data equipped with the driving computer can reach 20-50 items, such as instant fuel consumption, average fuel consumption, remaining fuel volume, mileage, engine speed, intake pressure, acceleration performance, coolant temperature, these relatively basic data can be detected by each car, so that the owner or maintenance personnel can intuitively view the fault information.

Precautions for car use.

Every time you start the car, a large number of icons will appear in the middle of the dashboard, which will automatically turn off after a few seconds. This process is the self-inspection process of the car. When the self-test is completed, the corresponding icon will turn off, and the faulty icon will continue to illuminate to alert the driver.

The engine self-test light illuminates after each start of the car, indicating that the engine is in the process of self-testing. When the self-test is completed, if the engine is not found to be faulty, the icon will disappear (the whole self-test process lasts for a few seconds), if the icon continues not to go out, it means that the vehicle's engine is faulty, then it is best to go to the 4S shop for further testing.

1. The car driving computer is generally used to calculate instantaneous fuel consumption, mileage, temperature, average speed, average fuel consumption, etc., and some can also set reminders for maintenance, remind the driver to rest and other functions.

2. Not all EFI trucks have a driving computer, and many of the current cars generally have a driving computer, and some of them are incomplete. Today's cars are basically EFI trucks, and the cars with carburetors that were a little more advanced in the past should also have a trip computer.

3. Generally, the driving computer has a small screen on the dashboard or center console, which can display the above information for the driver's reference.

As follows:

1. The driving computer can solve the problem of breaking down in the middle of the ride.

2. The button has the function of automatic identification and repair.

3. For example, the brake handle does not return to position and the car cannot be ridden, press this button, it will voice prompt the brake line failure, you can press the repair button to drive slowly, which solves the trouble of the cart.

Introduce. The trip computer is actually an electronic control unit.

Whether it is the driving computer on the car or the driving computer on the electric vehicle, it is composed of three parts: input circuit, microcomputer and output circuit, and the signal of the input circuit has both analog signals and digital signals.

The trip computer has made great progress in the diagnosis function and standardization, and the fault indicator, diagnostic connection port, and external equipment have also been upgraded with the continuous development of production technology.