What is an automobile oil control valve
Automotive oil control valve (OCV valve) is a key part of the engine lubrication system , mainly used to accurately control the engine valve phase and oil pressure, so as to optimize engine performance and fuel economy.
Definition and function
The oil control valve (OCV valve) is mainly composed of a valve body (including a solenoid coil and a control module connector), a slide valve and a return spring. The working principle is to control the power on and power off of the electromagnetic coil through the pulse modulation signal provided by the engine control unit (ECU), and then generate a magnetic field to control the action of the slide valve, so as to continuously change the timing relationship between the crankshaft and the camshaft, to achieve the best valve phase control .
With this adjustment, oil control valves help increase engine efficiency, improve idle stability, deliver greater torque and power, while also improving fuel economy and reducing emissions .
Type and structure
Oil control valves can be divided into two categories: oil regulator valves and protection valves. The main function of the pressure regulator is to regulate the pressure in the system to prevent damage to the lubrication system due to high pressure; The protective valve plays a role in the failure of the pressure regulator to prevent the tubing from breaking due to excessive pressure .
In addition, there is an oil pressure control switch related to the circuit. When the oil pressure is insufficient, the switch will close and trigger the low oil pressure alarm light on the automobile instrument .
Location and application
The oil control valve is usually installed in the cylinder part of the engine, the specific position is on the back of the camshaft timing pulley on both sides, respectively responsible for the intake and exhaust functions. These valves are cylindrical in appearance and have a plug at the top that connects two wires . In addition, there are other important oil control valves in the system, such as the valve located in the cylinder body, the main task is to regulate the oil flow to the main tile and vvt; The other serves as the oil return valve to ensure that the oil can be returned to the oil pan after the vehicle is turned off.
The main function of the automobile oil control valve is to regulate and prevent the pressure of the engine lubrication system from being too high . By limiting the maximum pressure of the system, it prevents excessive pressure from damaging the components of the lubrication system and prevents oil leakage. Oil control valve is composed of body assembly and actuator assembly, divided into single-seat series, two-seat series, sleeve series and self-propelled series of four series, each series has its special application, advantages and disadvantages under different working conditions.
Specific role
Limit the maximum pressure of the system : oil control valve by regulating the oil supply of the oil pump, to prevent the oil pressure of the oil pump is too high, especially at high speed, the oil supply of the oil pump is too large, the oil pressure is significantly increased, then the oil control valve is particularly important.
Prevent damage to lubrication system components : Excessive oil pressure may cause the hydraulic tasht valve to close improperly, cylinder pressure to drop, and may even cause tubing to burst. The oil control valve protects the lubrication system from damage by regulating the pressure.
ensures efficient and stable operation of the engine : in the variable valve retiming engine, the oil control valve ensures the phase adjustment of the camshaft by accurately controlling the change of the oil passage, so as to ensure that the engine can achieve the best operating condition under different working conditions.
Fault effect
If the oil control valve fails, it may cause the vehicle to stall during driving, and the oil pressure will rise abnormally, affecting the performance of the vehicle, such as the mixture is too thick, black smoke from the exhaust pipe, and the power is weakened. Excessive oil pressure may also lead to increased fuel consumption, excessive exhaust emissions, and unstable idle speed, increasing the safety risks and economic burden of the car. Therefore, once the oil control valve is found to be faulty, it must be dealt with immediately.
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