Idling is the mode of operation of a device without load. This means that the generated energy is not transferred from the source to the consumer. The term itself is used not only to characterize the operation of internal combustion engines, but also in other areas of knowledge, such as electronics and programming.
With regard to the car idling, or idling, will be called the engine operation when the clutch is depressed or in neutral gear, when the crankshaft torque is not transmitted through the transmission to the propeller shaft, and from it, respectively, to the drive wheels. In both cases, the engine and wheels will be decoupled.
Normally, the idle speed of a stationary car is stable at 800-1000 rpm. If it is less, then the engine will stall when the clutch is released, an increased number of revolutions will lead to excessive fuel consumption and accelerated wear of vehicle components.
The idle speed is regulated by several components and assemblies of the car. First of all, this is a fuel supply system, consisting of an injector on modern cars or a carburetor on older ones, which are units for mixing fuel with air, a fuel pump, electronic or mechanical sensors, a fuel pressure regulator and other components that do not directly affect the number crankshaft speed.
In addition, RPM is influenced by the opening of the throttle valve, which regulates the air supply to the engine, and the operation of the idle valve, which bypasses the throttle. In addition, you can increase the speed, including idling, by using the accelerator pedal.
Unstable engine idling can be caused by a number of factors. The first of them is the contamination of fuel supply units and assemblies with used engine oil, soot, impurities in gasoline and air passing through the filter grids of these units, often in the gas-liquid mixture there is also water, on which, as you know, internal combustion engines have not yet work. Also, the problem can be caused by malfunctions in the ignition system, especially the UOZ, poor (oxidized, loosely tightened) contacts of high-voltage wires and other factors.
