Vehicle pump fuel quantity adjustment method, fuel supply system, fuel pump regulator and fuel pump

Abstract

The present invention discloses a vehicle oil pumping amount adjusting method. The vehicle oil pumping amount adjusting method comprises the following steps: (S1) calculating according to a current inlet manifold pressure signal and a current oil spraying pulse width signal to obtain a theoretical fuel oil required amount signal; (S2) calculating a theoretical fuel oil required amount and a working rotation speed of a pump core according to the theoretical fuel oil required amount signal; (S3) driving the pump core to rotate at the working rotation speed to convey oil in an oil tank to an oil outlet pipe; (S4) collecting an oil outlet amount signal of the oil outlet pipe to obtain an actual oil outlet amount; (S5) if the actual oil outlet amount is the same as the theoretical fuel oil required amount, keeping the working rotation speed of the pump core unchanged; if the actual oil outlet amount is different from the theoretical fuel oil required amount, modifying the theoretical fuel oil required amount to be consistent with the actual oil outlet amount and continuously performing the steps S2 to S4; and (S6) repeating the steps S1 to S5 every at least one working cycle of an engine. By virtue of the vehicle oil pumping amount adjusting method, the oil can be supplied according to the fuel oil request of a whole vehicle, so that the oil supply is more accurate and economical.

Description

technical field [0001] The invention relates to the field of automobile fuel control, in particular to a method for regulating the amount of fuel pumped by a vehicle, a fuel supply system, an oil pump regulator and an oil pump. Background technique [0002] The technical scheme of the existing fuel supply system is: after the vehicle electronic system is powered on, the fuel pump relay is turned on, and the electronic fuel pump continuously pressurizes the fuel in the fuel tank and pumps it into the fuel pipe outside the fuel tank. At present, the control system of the fuel pump volume in the fuel supply system is closed-loop control. Usually, the pump fuel volume of the fuel pump is greater than the actual fuel demand, and the excess fuel pumped out will flow into the fuel pipe, which will cause the fuel pressure in the fuel pipe to rise continuously. For this reason, a pressure relief valve is installed on the fuel pipe to relieve the pressure of the fuel pipe. When the fu...

AI Technical Summary

Problems solved by technology

[0004] 1. The control method of the pump oil volume is open-loop control, the pump oil volume cannot be adjusted according to the vehicle demand, and the control accuracy is low;

[0005] 2. The excess fuel pumped out is easily heated in the oil pipe, which will increase the temperature of the fuel. Excessively high fuel temperature will easily form air resistance in the oil circuit, resulting in unstable engine operation, automatic flameout or failure to start the heat engine.

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