Steering system for eight-wheel and four-axle passenger car

Abstract

The invention relates to a steering system for an eight-wheel four-axle passenger car. The steering system comprises a direction control device, a steering engine, a power-assisted steering system, a first-axle steering system, a second-axle steering system, a fourth-axle active steering system and an active steering control system, wherein the direction control device transmits steering action to the steering engine, the first-axle steering system controls steering of a left wheel and a right wheel of a first axle, the second-axle steering system controls steering of a left wheel and a right wheel of a second axle, the fourth-axle active steering system controls steering of a left wheel and a right wheel of a fourth axle, and the active steering control system controls the fourth-axle active steering system according to the speed of the passenger car. According to the steering system, due to the fact that the fourth axle of the eight-wheel four-axle passenger car is designed to be a servo axle, the rotation center of the passenger car can be moved onto the axis of a third axle, the stress form of rear wheels of the eight-wheel four-axle passenger car during turning can be changed, sliding friction can be changed into rolling friction, friction force can be reduced, wearing of tires of the rear wheels during turning can be reduced, the service life of the tires can be guaranteed, and the operation cost of the passenger car can be reduced.

Description

Technical field: [0001] The invention relates to the technical field of multi-axle passenger car steering systems, in particular to a steering system for eight-wheel and four-axle passenger cars. Background technique: [0002] With the development of my country's automobile technology, in the field of passenger vehicles, multi-axle passenger vehicles are more and more favored by customers due to their characteristics of large load capacity and low average fuel consumption. For example, the most common eight-wheel four-axle bus on the market, especially the eight-wheel four-axle pure electric bus, has been widely promoted in the field of urban public transportation due to its strong carrying capacity and energy-saving and environmental protection performance. However, the existing eight-wheel four-axle The two-wheel four-axle bus mostly adopts a double-steering front axle + double-rigid rear axle structure, that is, the two front axles of the eight-wheel four-axle bus are ste...

AI Technical Summary

Problems solved by technology

For example, the most common eight-wheel four-axle bus on the market, especially the eight-wheel four-axle pure electric bus, has been widely promoted in the urban public transport field due to its strong carrying capacity and energy-saving and environmental protection performance. However, the existing eight-wheel four-axle Four-wheel four-axle buses mostly adopt the structure of double steering front axle + double rigid rear axle, that is, the two front axles of eight-wheel four-axle buses are steering axles, the two rear axles are driving axles, and the driving axles are rigid driving axles. , without steering function, when the bus turns, the steering instantaneous center of the whole vehicle is on the middle parallel line between the two rear axles, when the vehicle turns, the orientation of the wheels of the two rear axles is still the direction before the bus turns At this time, the direction of the rear wheels is inconsistent with the direction of the front wheels. The front wheels pull the rear wheels, and the sliding friction between the rear wheels and the ground causes the tires of the two rear axles of the bus to wear abnormally, which seriously reduces the service life of the rear tires of the bus. , increasing the bus operating cost

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