A method for controlling an oil pump of a hybrid electric vehicle
A hybrid vehicle and control method technology, applied in hybrid vehicles, pump control, motor vehicles, etc., can solve problems such as insufficient system pressure, affecting vehicle performance, gearbox durability, etc., to improve durability and avoid insufficient system pressure Effect
Active Publication Date: 2017-04-05
奇瑞控股集团有限公司
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Problems solved by technology
[0002] With the development of the automobile industry, R&D personnel found in the process of developing hybrid vehicles that for the control of the oil pump of the automatic transmission, there will be a delay in the start-up process of the high-voltage motor oil pump, which will cause system pressure during the switching process with the mechanical oil pump. Insufficient, affecting the performance of the vehicle and the durability of the gearbox
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[0019] The transmission electronic control unit (TCU) sends a speed request command to the high-voltage motor oil pump controller. During the process of requesting the high-voltage motor oil pump from stationary to running, due to the lag of the motor response and the lag of the hydraulic system, the actual oil pressure of the system will be different from the demand. There is a certain delay between the oil pressures, so the control algorithm of the motor oil pump needs to be improved. Such as figure 1 As shown, the control method of the high-voltage motor oil pump of the present invention is as follows:
[0020] In the control process, first calculate the demand flow of the motor oil pump according to the current demand flow of the system, the flow provided by the mechanical pump and the change of the flow of the mechanical pump. Fill oil, and finally output the requested speed of the oil pump motor.
[0021] Specifically, follow the steps below:
[0022] Step 1. After th...
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The invention discloses an oil pump control method for a hybrid vehicle. The method comprises the steps: the step 1, after starting the vehicle, calculating the required flow of the motor oil pump through a system; the step 2, according to the required flow, adjusting whether the motor oil pump is needed to be started, if the motor oil pump is needed to be started, performing the step 3, if not, performing the step 5; the step 3, judging whether the oil is needed to be refilled through the system, if the oil is needed to be refilled, performing the step 4, if not, performing the step 5; step 4, refilling the oil by the system; and the step 5, completing, and outputting the required revolving speed of the motor oil pump. The oil pump control method for the hybrid vehicle is capable of, according to the flow and flow variation of the system, starting the high-voltage motor oil pump in advance, correcting the control output of the high-voltage motor oil pump according to the flow variation, avoiding the underpressure phenomenon of the system in the oil pump switching process of the hybrid vehicle, and improving the driving effect and durability of a gear box.
Description
technical field [0001] The invention relates to the field of hybrid vehicle automatic transmission control. Background technique [0002] With the development of the automobile industry, R&D personnel found in the process of developing hybrid vehicles that for the control of the oil pump of the automatic transmission, there will be a delay in the start-up process of the high-voltage motor oil pump, which will cause system pressure during the switching process with the mechanical oil pump. Insufficient, affecting the performance of the vehicle and the durability of the gearbox. Contents of the invention [0003] The technical problem to be solved by the present invention is to realize a control method for switching the oil pump of a hybrid electric vehicle that is reliable and can avoid the phenomenon of insufficient system pressure during the switching process. [0004] In order to achieve the above object, the technical solution adopted in the present invention is: a hyb...
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IPC IPC(8): B60W10/30B60W20/00F04D27/00
CPCB60W10/30B60W20/00
Inventor 田文瑞倪斌刘尊鹏
Owner 奇瑞控股集团有限公司