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Injector failure: the cause of back pressure caused by the power failure of the low-pressure injector

Injector failure: the cause of back pressure caused by the power failure of the low-pressure injector

Car troubleshooting 2020-01-04 15:45:28


The low-pressure injector is a normally closed valve (normally closed valve means that the valve is always closed when no control signal is input; normally open valve is that the valve is always open when no control signal is input) A valve needle moves up and down to control the opening and closing of the valve. Multi-point injection of low-pressure injector ...

What is the reason for the broken crankshaft? Why does the crankshaft break

What is the reason for the broken crankshaft? Why does the crankshaft break

Engine troubleshooting 2020-01-01 21:02:04


The fracture of the crankshaft usually starts from the smallest crack, and most of the crack fractures occur at the joints of the crankshaft and end cylinder connecting rod journals with the crank arm. During the operation, the crack gradually expanded and suddenly broke when it reached a certain level. When looking on the fracture surface, there are often brown parts, which is obviously an old crack ...

What are the symptoms of a leaked piston ring? How to judge?

What are the symptoms of a leaked piston ring? How to judge?

Automotive troubleshooting 2020-01-01 20:56:51


In order to find out whether the insufficient compression force of the cylinder is caused by a bad piston ring, some clean and good engine oil can be added to the cylinder. If the cylinder compression force is significantly increased after the oil is added, it indicates that the piston ring is bad, and the gas leaks into the oil pan through the gap between the piston and the cylinder wall. If after adding oil, ...

What is the reason for the sudden increase (high) of car fuel consumption? How to solve

What is the reason for the sudden increase (high) of car fuel consumption? How to solve

Car troubleshooting 2019-11-30 00:24:48


Many car owners have said that they feel the fuel consumption of cars has increased. What is the reason? In fact, the sudden increase in automobile fuel consumption is generally caused by various failures of the car. The most common problems are insufficient tire pressure, excessive carbon deposits in the engine, and damage to the oxygen sensor. If you find that the fuel consumption is suddenly higher than usual ...

Cause Analysis of Fracture Failure of Engine Crankshaft

Cause Analysis of Fracture Failure of Engine Crankshaft

Engine troubleshooting 2019-11-18 10:17:14


Fracture failure refers to the separation process of a geometric surface with a limited area of metal, alloy materials, and mechanical products. Fracture is the main form of failure of the engine crankshaft during operation, and fatigue fracture ranks first, accounting for about 60% of failure cases, causing huge waste and loss to the production and operation of enterprises,

Fault diagnosis and elimination of engine crankshaft fracture

Fault diagnosis and elimination of engine crankshaft fracture

Car troubleshooting 2019-11-18 10:11:41


In order to prevent the crankshaft from being broken, the following measures can be taken during maintenance: 1. Before repairing the crankshaft, carefully check the crankshaft for cracks, pay special attention to the fillet transition parts, and the shaft should be scrapped if cracked. When polishing the journal, the journal and the crank arm should keep a certain fillet radius.

Ten reasons for engine crankshaft fracture

Ten reasons for engine crankshaft fracture

Engine troubleshooting 2019-11-18 10:08:37


The fracture of the crankshaft usually starts from the smallest crack, and most of the crack fractures occur at the connecting part of the crankshaft of the head cylinder or the end cylinder connecting rod and the crank arm. During the operation, the crack gradually expanded and suddenly broke when it reached a certain level. When you look on the fracture surface, you often find brown parts, which is obviously ...

What are the reasons for the high oil consumption?

What are the reasons for the high oil consumption?

Engine troubleshooting 2019-10-27 23:56:27


Excessive oil consumption not only causes waste and pollutes the environment, but also deposits of carbon after burning into the cylinder, which will pollute the spark plug and increase cylinder wear. The main reasons for the excessive oil consumption are the following: 1. Leakage of oil leakage The sealing surfaces of the engine are not tightly tightened and the oil seal is old ...

What causes the car to leak antifreeze? How to do

What causes the car to leak antifreeze? How to do

Car troubleshooting 2019-10-26 21:53:32


(1) A simple method for judging the antifreeze leakage of a car ① Visually check the coolant pot. If it is lower than the lower limit, the car may be leaking antifreeze. You need to add antifreeze. ② The engine temperature indicator on the instrument panel lights up, and the alarm temperature rises. For example, the temperature of Jetta electronic instrument cluster refers to ...