Where is the idle speed adjustment of Chang 'an s460?

First, adjust the throttle screw of the carburetor clockwise and counterclockwise (crosshead screw on the right front side of the carburetor). Adjust the engine speed slightly higher than the normal idle speed, and then turn the idle oil concentration adjustment screw (copper screw with prefix on the left side of carburetor, clockwise downward and counterclockwise upward). ), find out the highest speed of the engine at this throttle position.

Adjust the throttle screw slightly counterclockwise to reduce the engine speed; Then adjust the idle oil concentration adjustment screw to find a higher engine speed. This is repeated several times according to the mode of "throttle down+idle oil up" until the maximum speed of the throttle valve is equal to the standard idle speed of the whole vehicle when it is adjusted to a certain position.

Matters needing attention when the car is idling

Cars also need to consume fuel when idling. After all, the internal combustion engine is in the starting state, and the speed will fluctuate between 800- 1200rpm (cold air conditioning will increase the idle speed). Then idle fuel consumption needs to be divided into two standards. First, do not speed up the use of heating system standards; Taking 800 as a reference, the fuel injection quantity in the hot car state is calculated according to the ratio of intake air 14.7: 1, which is referred to as air-fuel ratio-air-fuel ratio.

As for the cold air conditioner, the fuel consumption is definitely higher, because the compressor loses the torque output by the crankshaft, and the power is reduced when the torque is reduced; If the engine is still idling at the standard speed of 800 rpm, the engine will shake, so ECU has to increase the speed to compensate the power consumed by the compressor for several kilowatts.