A Uphill Shift Strategy for Buses

A gear shifting strategy and bus technology, which is applied to vehicle parts, transportation and packaging, mechanical equipment, etc., can solve the problems of insufficient power and high energy consumption, and achieve the effect of improving work efficiency and economy

Active Publication Date: 2021-09-03
TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention proposes a bus uphill shift strategy, the bus includes an engine, a transmission, the engine is connected to the transmission input, and the transmission output is connected to the bus The rear axle is connected, and the transmission is an automatic transmission. When the bus reaches the speed of entering the next gear when going uphill, whether the transmission chooses to shift gears depends on the output torque of the engine and the transmission ratio of the transmission It is decided to calculate in advance whether the output torque of the engine can meet the needs of the vehicle, which can not only meet the driving needs of the vehicle, but also avoid the problems of insufficient power and high energy consumption caused by frequent switching gears back and forth

Method used

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  • A Uphill Shift Strategy for Buses
  • A Uphill Shift Strategy for Buses
  • A Uphill Shift Strategy for Buses

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Embodiment Construction

[0015] The concrete implementation method of the present invention is as follows:

[0016] Existing hybrid electric buses have been more and more accepted by the public, especially hybrid electric buses, which have been widely used on bus lines in major cities. Due to the low efficiency of low-speed engines, hybrid electric buses Using electric motors to drive vehicles can not only improve the efficiency of the vehicle, but also greatly reduce the emission of vehicles at low speeds, and even do not emit pollutants at low speeds. However, buses enter and exit stations at low speeds, which is very helpful for passengers getting on and off the bus. Good protective effect, but for buses with relatively bad operating conditions, such as areas with many ramps and long slopes, they often switch gears back and forth due to insufficient power after shifting, resulting in insufficient power and affecting the use of the transmission life.

[0017] In order to solve the above problems, t...

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Abstract

The invention discloses an uphill shifting strategy for a bus. The bus includes an engine and a transmission. The engine is connected to the input end of the transmission, the output end of the transmission is connected to the rear axle of the bus, and the The transmission is an automatic transmission. When the bus reaches the speed of entering the next gear when the bus is going uphill, whether the transmission selects a gear shift is determined according to the ratio between the output torque of the engine and the transmission, and calculates the speed in advance. Whether the output torque of the engine can meet the needs of the vehicle can not only meet the driving needs of the vehicle, but also avoid the problems of insufficient power and high energy consumption caused by frequent shifting of gears back and forth.

Description

technical field [0001] The invention relates to a bus control method, in particular to a strategy for selecting gears of a transmission when the bus goes uphill. Background technique [0002] As the utilization rate of buses is getting higher and the workload of bus drivers is also increasing, many buses in order to reduce the workload of bus drivers, and with the application and promotion of new energy buses, especially hybrid buses The use of buses is increasing, and many buses have been equipped with hybrid systems, which have low operating noise and low fuel consumption. However, due to the diversity of China's terrain, the terrain varies greatly from place to place, and the same or similar control strategies cannot fully cover them. All areas, especially places with special terrain, such as cities with many ramps, will have higher power requirements for buses, and if the up and down ramps are long, they may switch back and forth due to lack of power Gears, frequent swi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/14F16H61/02B60K6/547
CPCB60K6/547F16H59/14F16H61/0213F16H2059/147F16H2061/0096F16H2061/0216
Inventor 侯明月黄俊
Owner TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
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