CN105422840A - AMT gear shifting control method and system with gear shifting displacement tracking compensation function - Google Patents

Abstract

The invention discloses an AMT shift control method and system for shift displacement following compensation, which includes a shift fork stiffness compensation strategy, vehicle speed signal, engine speed signal, throttle opening signal, shift drive device, shift Executing mechanism, displacement sensor, force sensor, TCU and transmission transmission mechanism, TCU receives vehicle speed signal, engine speed signal and throttle opening signal, and controls gear shifting; at the same time, according to the shift fork stiffness compensation strategy and the displacement signal collected by the displacement sensor As well as the force signal collected by the force sensor, the deformation compensation of the shift fork is carried out to realize the precise control of the shift process. The AMT shift control method and system for shift displacement following compensation of the present invention are applicable to the field of automobile technology, especially when an all-electric automatic transmission with a faster response speed is applied to an automobile transmission system, better system integration control will be obtained Effect, improve the gear shifting precision, and then can improve the gear shifting quality of the car to a great extent.

Description

An AMT shift control method and system for shift displacement following compensation

technical field

The present invention relates to the technical field of vehicle control, and more specifically, relates to an AMT shift control method and system for shift displacement following compensation.

Background technique

Sustained and rapid economic development has made problems such as energy shortage and environmental pollution increasingly prominent. Accelerating the cultivation and development of efficient new automotive technologies is an important strategic measure for the automotive industry. High-efficiency operation of automobile power plant is one of the main solutions to save energy and reduce emissions. An AMT shift control method and system with shift displacement follow compensation is to consider the influence of shift fork deformation on shift displacement. A more reasonable shift control strategy is developed to reduce shift impact and improve shift quality.

With the development of electronic technology and the rapid progress and application of modern control theory, all-electric AMT has become a hot spot in the development of automatic transmissions. Some domestic and foreign automobile companies and related research institutes have done a lot of research on all-electric AMT. In terms of formulating shift control strategies, domestic and foreign research institutions and experts and scholars have done a lot of work, and achieved a series of research results, formulated dynamic three-parameter shift rules and clutch combination rules, and proposed transmission, The combination rules of the engine and the clutch, and the series shifting process controller based on the fuzzy algorithm, etc., the above research has greatly promoted the improvement of the shifting quality of AMT, but there is still room for improvement.

During the shifting process, the displacement of the adapter sleeve is the actual shifting displacement, and the displacement signal collected by the displacement sensor is the displacement at the shaft hole of the shift fork, which cannot reflect the actual shifting displacement, which will affect the shifting of the AMT. Control precision, produce shift shock. In order to improve the shifting control accuracy of AMT and reduce the shifting impact, the inventor proposes an AMT shifting control method and system based on shifting displacement following compensation, which considers the force of the shifting fork during the shifting process of the vehicle. and the deformation of the shift fork is introduced into the control system of the shift drive device as a compensation amount. The TCU obtains a relatively accurate shift displacement according to the compensation strategy for the stiffness of the shift fork and controls the shift process. , which in turn can improve the control accuracy of AMT, reduce the impact of shifting, and improve the quality of shifting.

Contents of the invention

In order to overcome the deficiencies in the prior art, the present invention proposes a shift control method and system for AMT with follow-up compensation for shift displacement. As a result, problems such as an increase in the probability of shifting failure and an increase in shifting impact have occurred. Through the stiffness analysis and experimental research on the shift fork, a strategy for shifting displacement follow-up compensation is proposed, which can improve the control accuracy of the shifting drive device and realize shifting. Real-time and precise control of the process improves shift quality.

In order to solve the above-mentioned technical problems, the present invention adopts the method of shift displacement following compensation. According to the compensation strategy of shift fork stiffness, the TCU controls the shift actuator through the shift drive device to compensate the shift fork deformation and realizes precise control.

The AMT shifting control method and system of the shifting displacement following compensation of the present invention, on the basis of considering the AMT shifting method, taking into account the influence of the shifting fork deformation on the shifting accuracy, the introduction of shifting fork deformation compensation strategy, when the displacement sensor collects the displacement signal at the shaft hole of the shift fork, the TCU corrects the displacement signal according to the compensation strategy for the stiffness of the shift fork, so as to obtain the actual shift displacement, which can improve the shift control accuracy and reduce the Shift shock, improve shift quality.

The AMT shift control method and system of the present invention are applicable to the technical field of automobiles, especially when applied to the technical field of automobile transmission systems, and will obtain more accurate system integration control effects, which can be greatly improved. The shift control accuracy improves the success rate of shifting and the shifting quality of the vehicle; it also lays a good theoretical foundation for the popularization and application of direct-drive AMT and the precise control of smart cars. After the industrialized application of the AMT shift control method and system of shift displacement following compensation of the present invention, it will bring greater economic benefits.

Description of drawings

Fig. 1 is the AMT shift control method and system diagram of the shift displacement following compensation of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, an AMT shift control method and system for shift displacement following compensation proposed by the present invention includes: shift fork stiffness compensation strategy (1), vehicle speed signal (2), engine speed signal ( 3), throttle opening signal (4), shift drive device (5), shift actuator (6), displacement sensor (7), force sensor (8), TCU (9) and transmission transmission mechanism (10 ), wherein: the TCU (9) storing the shift fork stiffness compensation strategy (1) receives the vehicle speed signal (2), the engine speed signal (3), the throttle opening signal (4), the displacement sensor (7 ) and the force signal collected by the force sensor (8), the TCU (9) corrects the displacement signal collected by the displacement sensor (7) in real time according to the shift fork stiffness compensation strategy (1); the shift drive device (5) Drive the shift actuator (6); the displacement sensor (7) is placed on the shift fork shaft of the shift actuator (6); the force sensor (8) is placed on the output shaft of the shift drive end.

A further preferred solution of the present invention is.

The shift fork stiffness compensation strategy (1) is obtained through finite element analysis and experiments on the shift fork.

The vehicle speed signal (2) is collected by a vehicle speed sensor, the engine speed signal (3) is collected by a speed sensor, and the throttle opening signal (4) is collected by a throttle opening sensor.

The shift actuator (6) includes a shift lever, a shift paddle, a shift fork shaft and a shift fork, and the shift actuator (6) is connected with the transmission transmission mechanism (10).

The shifting drive device (5) is a moving coil electromagnetic actuator.

An AMT shift control method and system for shift displacement following compensation according to the present invention, as shown in Figure 1, TCU (9) according to vehicle speed signal (2), engine speed signal (3) and throttle opening ), to make a shift decision; the displacement sensor (7) is placed on the shift fork shaft of the shift actuator, and the force sensor (8) is placed at the output shaft end of the shift drive device (5); the displacement sensor (7) The collected displacement signal at the shaft hole of the shift fork and the axial force signal of the shift drive device (5) collected by the force sensor (8) are used as feedback signals and fed back to the TCU (9), and the TCU (9) shifts gears according to the The shift fork stiffness compensation strategy (1) corrects the received displacement signal, and controls the shift drive device (5) to drive the shift actuator (6) to realize shift displacement follow compensation. In the AMT shift control method and system for shift displacement following compensation of the present invention, considering the influence of the shift fork stiffness on the actual displacement of the adapter sleeve, the shift fork displacement following compensation strategy is adopted, which can obtain more accurate The displacement of the engaging sleeve during the shifting process can greatly improve the shift control accuracy, increase the success rate of shifting, reduce the impact of shifting, and can improve the shifting quality of AMT, laying a solid foundation for the popularization and application of direct drive AMT. Good theoretical basis.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (5)

1. AMT shift control method and the system of compensation is followed in a displacement of shifting gears, it is characterized in that, comprise: selector fork rigidity compensation strategy (1), vehicle speed signal (2), engine rotational speed signal (3), throttle opening amount signal (4), gearshift drive unit (5), gear shifting actuating mechanism (6), displacement transducer (7), force snesor (8), and gearing actuator (10) TCU(9), wherein: the TCU(9 storing described selector fork rigidity compensation strategy (1)) receive vehicle speed signal (2), engine rotational speed signal (3), throttle opening amount signal (4), after the displacement signal that displacement transducer (7) gathers and the force signal that force snesor (8) gathers, TCU(9) revise according to selector fork rigidity compensation strategy (1) displacement signal that displacement transducer (7) gathers in real time, described gearshift drive unit (5) drives gear shifting actuating mechanism (6), institute's displacement sensors (7) is placed on the declutch shift shaft of gear shifting actuating mechanism (6), described force snesor (8) is placed in the output shaft end of gearshift drive unit.

2. AMT shift control method and the system of compensation is followed in a kind of displacement of shifting gears according to claim 1, it is characterized in that: described selector fork rigidity compensation strategy (1) is by carrying out finite element analysis to selector fork and experiment obtains.

3. AMT shift control method and the system of compensation is followed in a kind of displacement of shifting gears according to claim 1, it is characterized in that: described vehicle speed signal (2) is collected by vehicle speed sensor, described engine rotational speed signal (3) is collected by speed probe, and described throttle opening amount signal (4) is collected by engine load sensor.

4. AMT shift control method and the system of compensation is followed in a kind of displacement of shifting gears according to claim 1, it is characterized in that: described gear shifting actuating mechanism (6) comprises shift lever, gearshift shifting block, selector fork axle and selector fork; Described gear shifting actuating mechanism (6) is connected with gearing actuator (10).

5. AMT shift control method and the system of compensation is followed in a kind of displacement of shifting gears according to claim 1, it is characterized in that: described gearshift drive unit (5) is moving coil type electromagnetic final controlling element.