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1. Overview of pre-oil supply pump
The pre-fuel pump is an auxiliary device in the diesel engine, mainly used to provide higher-pressure fuel to the high-pressure pump. The pre-oil supply pump is located in the middle of the oil inlet path and usually consists of a reverse pump, pump body, hydraulic pump plate, pump shaft, countershaft and other components.
2. Working principle of pre-oil supply pump
When the driver turns the key to start the engine, the electronically controlled fuel pump draws fuel from the fuel tank and enters the high-pressure fuel pump through the high-pressure fuel pipe. In order to ensure that the high-pressure oil pump can start normally, the air in the oil circuit needs to be discharged before the high-pressure oil pump feeds oil. The main function of the pre-fuel pump is to inject a certain amount of fuel into the oil circuit before the high-pressure fuel pump enters the fuel, so as to ensure the normal operation of the high-pressure fuel pump.
The working principle of the pre-oil supply pump can be divided into two parts: one is to use the pressure in the low-pressure oil circuit to rotate the hydraulic pump disc, driving the pump shaft to rotate to increase the oil circuit pressure; the other is to use the secondary shaft to transmit the plunger of the high-pressure oil pump operation. The design of the pre-fuel pump enables fuel to be injected into the high-pressure fuel pump at high pressure, and finally the high-pressure fuel pump delivers the fuel into the engine combustion chamber.
3. Application of pre-oil supply pump
The pre-oil supply pump is mainly used in low-temperature startup, plateau startup, and startup after long-term parking of diesel engines. It can improve the reliability of diesel engine startup and operation. Especially for high-power and high-performance diesel engines, a pre-fuel pump is needed to ensure normal engine startup.
It should be pointed out that a pre-fuel pump is not required for all diesel engines, and is only required in certain circumstances. For low-power diesel engines, it is sometimes not suitable to install a pre-fuel pump, because the reaction force of the pre-fuel pump will cause excessive rotational inertia when the engine is started, thereby making the engine more difficult to start. Therefore, the use of a pre-oil supply pump requires judgment based on actual conditions.
Please feel free to contactus Parts Sea engineers or sales for help if you have no parts No.
tse@partssea.com | sales@partssea.com
1. Overview of pre-oil supply pump
The pre-fuel pump is an auxiliary device in the diesel engine, mainly used to provide higher-pressure fuel to the high-pressure pump. The pre-oil supply pump is located in the middle of the oil inlet path and usually consists of a reverse pump, pump body, hydraulic pump plate, pump shaft, countershaft and other components.
2. Working principle of pre-oil supply pump
When the driver turns the key to start the engine, the electronically controlled fuel pump draws fuel from the fuel tank and enters the high-pressure fuel pump through the high-pressure fuel pipe. In order to ensure that the high-pressure oil pump can start normally, the air in the oil circuit needs to be discharged before the high-pressure oil pump feeds oil. The main function of the pre-fuel pump is to inject a certain amount of fuel into the oil circuit before the high-pressure fuel pump enters the fuel, so as to ensure the normal operation of the high-pressure fuel pump.
The working principle of the pre-oil supply pump can be divided into two parts: one is to use the pressure in the low-pressure oil circuit to rotate the hydraulic pump disc, driving the pump shaft to rotate to increase the oil circuit pressure; the other is to use the secondary shaft to transmit the plunger of the high-pressure oil pump operation. The design of the pre-fuel pump enables fuel to be injected into the high-pressure fuel pump at high pressure, and finally the high-pressure fuel pump delivers the fuel into the engine combustion chamber.
3. Application of pre-oil supply pump
The pre-oil supply pump is mainly used in low-temperature startup, plateau startup, and startup after long-term parking of diesel engines. It can improve the reliability of diesel engine startup and operation. Especially for high-power and high-performance diesel engines, a pre-fuel pump is needed to ensure normal engine startup.
It should be pointed out that a pre-fuel pump is not required for all diesel engines, and is only required in certain circumstances. For low-power diesel engines, it is sometimes not suitable to install a pre-fuel pump, because the reaction force of the pre-fuel pump will cause excessive rotational inertia when the engine is started, thereby making the engine more difficult to start. Therefore, the use of a pre-oil supply pump requires judgment based on actual conditions.