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Control method for power system of automatic transmission automobile

A control method and power system technology, applied in the direction of transmission control, transmission, fluid transmission, etc., can solve the problems of reducing fuel efficiency, increasing exhaust emissions, insufficient, etc., to reduce fuel efficiency, reduce The effect of shifting shock and reducing the demand for torque reduction

Active Publication Date: 2016-11-23
SAIC GENERAL MOTORS +1
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  • Abstract
  • Description
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Problems solved by technology

However, delaying the ignition advance angle will lead to incomplete combustion and reduce fuel efficiency. At the same time, incomplete combustion will also bring more carbon monoxide and nitrogen oxides, increase the burden on the three-way catalytic converter and increase exhaust emissions

Method used

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  • Control method for power system of automatic transmission automobile
  • Control method for power system of automatic transmission automobile
  • Control method for power system of automatic transmission automobile

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Embodiment Construction

[0041] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] figure 2 is a schematic diagram of a vehicle power system control process according to an embodiment of the present invention. from figure 2 It can be seen from the figure that the vehicle power system control method in the present invention controls the engine speed during the upshift process by controlling the engine output torque during the shift process and the pressure of the torque converter lock-up clutch. Specifically, the method in the illustrated embodiment may include the following steps:

[0043] 1) Input the engine speed and accelerator pedal signal at the start of shifting to the engine control module, and the engine control module outputs the engine output torque expected by the driver according to the designed relationship between engine speed, accelerator pedal signal and engine torque.

[0044] 2) Determine the ta...

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Abstract

The invention provides a control method for a power system of an automatic transmission automobile. The engine revolution speed in the upshifting process is controlled by controlling output torque of an engine and pressure of a lock-up clutch of a hydraulic torque converter in the gear shifting process. By controlling the output torque of the engine and the pressure of the lock-up clutch of the hydraulic torque converter in the gear shifting process, the control method can enable the engine revolution speed to be kept in a constant range, and therefore a driver does not perceive the gear shifting process through the change of the engine revolution speed; and the influence of inertia torque on gear shifting can be effectively lowered, and meanwhile the negative effects that combustion is not sufficient, and the use efficiency of fuel oil is reduced are not caused.

Description

technical field [0001] The invention relates to the technical field of automobile control; in particular, the invention relates to a method for controlling a power system of an automatic transmission automobile. Background technique [0002] As we all know, there is no clutch between the engine and gearbox of an automatic transmission car, and the connection between them is realized through a hydraulic torque converter. The role of the torque converter includes transmitting speed and torque and making the connection between the engine and automatic transmission non-rigid for automatic gear shifting. [0003] figure 1 It is a schematic diagram of a conventional shift process according to the prior art. exist figure 1 In , reference numeral 1 denotes an engine speed curve, 2 denotes a turbine speed curve, and 3 denotes an engine torque curve. During the upshift process of an automatic transmission car, due to the difference in transmission ratio between different gears, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/18F16H59/36F16H61/14
CPCY02T10/60
Inventor 田华张国胜张涛高仕猛闫勋成
Owner SAIC GENERAL MOTORS
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