A drive system of vva solenoid valve with close detection function

A solenoid valve driving, solenoid valve technology, applied to non-mechanically actuated valves, valve devices, engine components, etc., can solve the problems of inaccurate driving process and inconsistent performance of solenoid valves, so as to improve fuel economy and ensure power. performance, improve idle speed stability

Active Publication Date: 2021-12-21
WUXI VOCATIONAL & TECHN COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In the above process, the VVA solenoid valve is just a simple actuator, and the state of its working process and the actual complete closing time are uncertain. Although its complete closing time can be obtained by theoretical calculation, it is affected by the inconsistent perfo

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  • A drive system of vva solenoid valve with close detection function
  • A drive system of vva solenoid valve with close detection function
  • A drive system of vva solenoid valve with close detection function

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[0042] The technical solutions of the present invention will be described in conjunction with the accompanying drawings, and the described embodiments are merely embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by those of ordinary skill in the art without performing creative labor premises.

[0043] like Figures 2 to 5 As shown, a VVA solenoid valve drive system having a closed detection function is provided, including:

[0044] VVA solenoid valve L, one end is connected to the power supply + BP by high-end transistor Q1, and the other end is sequentially grounded by low-end transistors Q2 and sampling resistor R1, and the high-end transistor Q1 and the common end of the VVA solenoid valve L connect the first diode tube. The cathode of D1, the anode of the first diode D1, the VVA solenoid valve L, the second diode D2, the second diode D2, and the second diode D2. Cathode connection of the power sup...

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Abstract

The invention discloses a VVA solenoid valve driving system with a closing detection function, which includes a VVA solenoid valve, a driving module, a current sampling amplifier circuit and a closing detection circuit, and the driving module uses the driving circuit to drive a transistor connected to the VVA solenoid valve state. The present invention utilizes the inherent characteristics of the VVA solenoid valve itself, and when driving the VVA solenoid valve, the operating current of the solenoid valve is changed in a "V" shape in which the sawtooth wave first drops step by step and then the sawtooth wave rises step by step during the rapid increase stage, so that The closed state of the VVA solenoid valve is detected by the closed detection circuit without adding additional sensors, so that the VVA solenoid valve is not only an actuator, but also a sensor, which can realize the closed state detection of the solenoid valve and adjust the driving timing of the solenoid valve. It is helpful to improve the idling stability of the internal combustion engine, increase the torque in low-speed conditions, ensure the power performance in high-speed conditions, and improve the fuel economy at low speeds and small loads.

Description

technical field [0001] The invention relates to a VVA solenoid valve drive system with a closing detection function, belonging to the technical field of VVA solenoid valves. Background technique [0002] A variable valve actuator (abbreviation: VVA) solenoid valve is a normally open valve commonly used in internal combustion engines. The state of the VVA solenoid valve (that is, the solenoid valve of the variable valve drive mechanism, the same below) is controlled by the driving current. The process of driving the VVA solenoid valve from the normally open state to the closed state and then back to the normally open state mainly includes excitation, rapid lifting, and maintenance. And open four phases, the current waveform of the corresponding VVA solenoid valve is as figure 1 Shown: [0003] 1) The excitation stage mainly includes the current rising section A and the magnetizing current holding section B. The excitation stage is not long, and it is mainly used to pre-magn...

Claims

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Application Information

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IPC IPC(8): F01L1/46F01L1/344F01L1/44F01L9/20
CPCF01L1/46F01L1/344F01L1/44
Inventor 张爱云张美娟谢宏斌谢平
Owner WUXI VOCATIONAL & TECHN COLLEGE
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