A method for controlling the neutral gear of an automobile automatic transmission

Abstract

The invention provides a neutral gear control method of an automatic automobile speed changer, and belongs to the technical field of automatic automobile speed changers. The neutral gear control method solves the problem that in the prior art, the application range is not wide enough. The neutral gear control method of the automatic automobile speed changer comprises the following steps that A. judgment is carried out before N gear is engaged, signals transmitted by a brake pedal position sensor, an accelerator aperture sensor and an automobile speed sensor are received through a controller, comprehensive judgment is carried out, and whether a control signal for engaging the gear into the N gear is output or not is judged according to a signal transmitted by a gear sensor; B. judgment is carried out before D gear is engaged, signals transmitted by the brake pedal position sensor and the accelerator aperture sensor are received by the controller, judgment is carried out, and whether a control signal for engaging the gear into the D gear is output or not is judged according to the signal transmitted by the gear sensor; C. automatic gear switching control is carried out. The method is used for automatically switching the D gear into the N gear when an automobile waits for the traffic light or is in traffic congestion, the using range is wide, the comfort level is high, and oil consumption is low.

Description

technical field [0001] The invention belongs to the technical field of automatic transmissions of automobiles, and relates to a neutral gear control method of automatic transmissions of automobiles. Background technique [0002] Now, with more and more vehicles in the world, the corresponding vehicle energy oil is less and less, resulting in soaring gasoline prices, and with the development of intelligent and humanized cars, comfort and low fuel consumption have always been our Pursuit of the goal, therefore, each car manufacturer is working on the reduction of fuel consumption. When a car is stuck in traffic or waiting for a red light, it needs to stop and start continuously. For a car with automatic transmission, in order not to cause the engine to stall, the idle speed of the engine in gear is usually higher than that in neutral. Generally, the idle speed in neutral gear is 750 rpm, and the idle speed with gear is 900 rpm. It can be concluded that the fuel consumption a...

AI Technical Summary

Problems solved by technology

This control method can reduce shifting operations to improve driving comfort and reduce fuel consumption. However, this control method is mainly used in the case of waiting for traffic lights. For vehicles in traffic jams, if only judging the braking signal, it is impossible to determine whether the vehicle will stop. It is possible that the vehicle brakes only to avoid pedestrians, and it cannot play the role of automatic shifting in traffic jams, and the range of use is not wide enough

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