Precision machining HS code checks

List of contents of this article:

• 1,Precision machining HS code checksWhat are the common diseases of 3uz engine?
• 2, Toyota 3uz engine idle speed increases by itself
• 3, 3uz engine fuel consumption

What are the common diseases of 3uz engine?

The following is a detailed introduction to the common disease of the 3uz engine: abnormal jitter: the most common is idle jitter caused by dirty throttle valve. Others include spark plug poor operation, ignition coil damage, engine mechanical failure, etc.Severe carbonization of the engine: The main reason for the serious carbonization of the engine is the use of inferior oil and fuel.

After the piston ring, cylinder liner and other wear valves, piston rings and cylinder liners are worn, it causes insufficient compression pressure and the oil to run into the combustion chamber, so that at the end of the compression stroke, the normal proportion of mixed gas mixture changes, so that the fuel burns under oxygen-free conditions, and the combustion process is easy to produce carbon accumulation, discharged The exhaust gas forms a large amount of black smoke.

Throttle valve failure. If the throttle valve is too dirty, it will cause an error in the opening of the throttle valve, the sensitivity of the throttle valve will be reduced, and it may not close in place when idling, resulting in abnormal idle speed. In addition, throttle failure also affects the power, acceleration performance and fuel consumption of the engine, and even causes difficulty in starting in serious cases. Fault of the idling control valve.

The common faults of automobile engines are summarized as follows: the engine cannot be started;Engine stall failure; engine idle failure, mixed gas failure; acceleration failure, engine cannot be started (1) Fault phenomenon: turn on the ignition switch, turn the ignition switch to the start position, the engine cannot start.

The more common reason is the valve noise. Another common reason is the high-pressure pump noise. Most engines using direct injection technology have this problem. The high-pressure oil pump is driven by the camshaft when working. Because there is no buffer between the top rod of the high-pressure oil pump and the camshaft, when working There will be a strange sound of da da.

There is carbon accumulation in the combustion chamber, causing the gas ring of the piston ring to be stuck and poorly sealed. Oil sludge is produced in the lubrication system, which blocks the return hole of the oil ring and weakens the oil scraping performance. There is wear between the piston and the cylinder wall.The valve seal is corrosion-aging and the sealing performance is invalid.

Toyota 3uz engine idle speed rises by itself

1. Engine failure. When using Toyota's 3uz engine, the engine idling speed automatically increases, which is caused by engine failure, and you need to go to the 4s store for repair.

2. If it is an idling motor, the adjustment screw can adjust the opening of the throttle valve blade! If it still doesn't work, loosen the two screws of the solenoid valve of the idle motor and rotate the solenoid valve to the side of the idle air intake to reduce the air intake.

3. Solution: It is recommended to clean the engine carbon frequently. Empty air filter: If it is not replaced in time, it will cause insufficient air intake and lower engine idle speed, resulting in engine shaking.Solution: Replace the empty air filter.

4. The idle speed of Toyota Corolla is high. If this happens, it means that it is caused by excessive carbon accumulation and sludge in the idling motor of the engine. Cleaning the idling motor of the vehicle engine can eliminate this problem. The specific operation steps for cleaning the idling motor of the Toyota Corolla engine are as follows: remove the idling The plug of the motor.

5. The reason for the sudden increase in the idle speed of the car 1 The main reason for the increase in idle speed during cold start is that some all-aluminum engines dissipate too fast, have good sealing, and the efficiency of gas combustion is relatively high. Therefore, if the speed is low at the time of ignition, there will be undercombustion, resulting in excessive carbon accumulation or There is a lack of cylinder, so the high speed is actually.

3uZ engine fuel consumption

1. The fuel consumption per 100 kilometers in urban areas is 16l to 17l, and the fuel consumption per 100 kilometers at high speed is 8l to 10l. 3UZ is the engine equipped with Lexus ls430. 3L displacement, 282 horsepower, 417 N·m torque. Adopt aluminum alloy cylinder block and aluminum alloy cylinder head. Equipped with vvt-i intelligent timing variable valve control system. The fuel supply mode is multi-point injection.

2. The difference between uz2uz3uz engines mainly lies in the displacement. 1uz is 0, 2uz is 7, and 3uz is 3. All three engines are V-type eight-cylinder engines. In terms of fuel consumption, 3uz is the lowest.

3. uz engine fuel consumption The fuel consumption per 100 kilometers in urban areas is 16l to 17l, and the fuel consumption per 100 kilometers at high speed is 8l to 10l. 3UZ is the engine installed on the Lexus ls 430.3L displacement, maximum horsepower 282 horsepower, maximum torque 417 Nm. Adopt aluminum alloy cylinder block and aluminum alloy cylinder head. Equipped with vvt-i intelligent timing variable valve control system.

4. The difference is that the 3uz engine has stronger performance, good fuel consumption control, and more stable high speed. 2jz consumes a high fuel consumption.

5. 3L V8 engine code-named 3UZ-FE, the same engine as the old Crown VIP and LS430, the maximum horsepower is 283 horsepower, the maximum torque is 417 N·m, matching 6AT gearbox, front and rear-wheel drive, official 0-100km/h acceleration for 1 second, quality The volume is 1695kg, the urban fuel consumption is about 15L, and the pure high-speed is about 9L.

6. I am also very satisfied with the fuel consumption of the 3V8 machine.My average speed of 20-30 kilometers in Beijing is basically 15-15 oil. From the Spring Festival to now, the road conditions in Beijing are very good. I have driven at least 8 oil.