Idling Control Technology of Automotive Engine

First, the control technology of automotive engine devices and performance Under the support of new manufacturing processes, new technologies and means, the application of the idle speed control technology of automotive engine devices is very important for the improvement of vehicle drive performance. Idling control technology can also increase the stability and economy of automotive engine system operation, and the principle of this technology is related to the adjustment of "air volume".

1. The idle speed control technology "idle speed" refers to the steady state of the engine equipment of the vehicle when it runs without load. However, when the speed of the "idle speed" is relatively high, it will directly affect the fuel quantity of the automobile engine; if its rotational speed decreases, It will enhance the emission of harmful substances in automobiles. Obviously, it is necessary to properly control the "idle speed" of the car so as to reduce the energy consumption of the car engine and reduce the pollution degree of the harmful substances to the environment. In this link, a set of more advanced practical technologies is "idle speed control technology."

2. The principle of idle speed control technology The principle of idle speed control technology in the system is relatively simple, mainly with the direct relationship between the intake air volume. In terms of the above, when the car's engine runs at idle speed, the throttle valve is in the fully closed position, and the “air volume” immediately entering the engine is no longer regulated by the throttle valve. The actual idle speed control is to adjust the “intake air amount” through the idle actuator and adjust the fuel injection amount and ignition advance angle so as to improve the power of the “idle” working condition fuel consumption to stabilize and change the idle speed.

3. Idling Control Actuator Study From the overall situation, the control measures for idle air volume are directly related to the vehicle model. Therefore, there are two idle speed control implementation options: one is a direct-acting “idle” control that can directly control the valve position, and the other is a bypass “idle speed” control that indirectly effectively controls the air flow of the air passage. That is achieved by controlling the air flow of the bypass air channel.

Second, the engine's idle speed control technology device performance changes In general, when the car engine device output load, the engine speed of the engine through the vehicle driver to accelerate the pedal to adjust the throttle position, and then change the device's air intake and Completed. In the "idle" situation, even if the driver of a car quickly lifts off the pedal and tries to adjust the "air intake", its effectiveness is minimal. This is why the idle speed control device is added to the car engine.

1. The role of control technology in automotive engine installations In the implementation process, the role of "idle speed control technology" in automotive engine installations is significant. The most important ones are two functions: (1) It is possible to stabilize the speed of automobile engines, and then It can reduce the gasoline consumption of idling vehicles, reduce the consumption of driving energy, and reduce the emission of harmful gases and play a substantive role; 2 As the automobile engine is running at idle speed, it is easy to increase the load (such as open air conditioning or power steering Turning on the switch, etc.) causes a sudden engine stall. Therefore, by adjusting the idle operation operation, it is effective to prevent the occurrence of car half-way anchoring during driving on the road.

2. The actual application content and effectiveness of the idling speed control technology, which integrates the performance of the idling control technology after the idling speed control technology, will vary depending on the type of vehicle. The basic principles of the technology in practice are consistent. Under such circumstances, the computer system controls the idle speed rationally. The detailed technical implementation links include: automotive engine start control, vehicle load change control and car warming Machine control and other aspects. In fact, the application of idle speed control technology is to control the intake air volume when the car is "idle".

Third, the application of idle speed control technology on the impact of automotive engine equipment from the implementation point of view, the various types of idle speed control valve and related technologies applied to the process of automotive engine equipment, can be the functional belt of the car engine device Positive influence. Under normal circumstances, the stepper motor type "idle" control valve can be used to control the fast idle speed of the automobile engine. Under the influence of the idle speed control technology, the rotation condition of the automobile engine device is relatively stable, the effect is very obvious and the automobile engine device is effective. The energy consumption has been reduced.

IV. Engine Idle Speed ​​Control Mode In order to enhance the overall performance and comfort of the engine, effective control of the engine must be implemented. The control of idle speed includes two kinds, open-loop and closed-loop control. The open-loop control is mainly performed in the cases of vehicle startup, warm-up and deceleration, etc. When the car is actually in idle operating conditions, closed-loop control is adopted. Control includes control of the target idle speed and its closed-loop air flow, where the target idle speed control is primarily determined by the basic idle speed and some compensation. As the cooling water temperature of the vehicle decreases, the basic goal of the automobile engine will increase rapidly. In addition, when the battery voltage of the vehicle is very low, a certain amount of air can be compensated for by using the bypass air valve to increase the load of the generator. This method can also be used to cause the engine speed to slowly decrease when the engine exits the deceleration and cut off the oil in some aspects. In short, open-loop air flow control plays a very important role in idle speed control.