Gear shifting control valve group for hybrid power gearbox of off-highway mine car and control method of gear shifting control valve group

Abstract

A gear shifting control valve group for an off-highway mine car hybrid power gearbox comprises a valve group, a valve group input oil port (P) connected with a gearbox hydraulic system oil source, a first output port (B) connected with a gearbox brake piston and a second output port (C) connected with a gearbox clutch piston. The valve group comprises an electromagnetic directional valve A (1), an electromagnetic directional valve B (2), a hydraulic control directional valve C (3), a first shuttle valve D (4) and a second shuttle valve E (5). According to the designed control valve set, mechanical interlocking between a high-speed gear oil way and a low-speed gear oil way can be achieved, self-locking of working gears can be achieved, and safety and reliability are achieved; the dependence of a traditional large mine car on an imported gearbox is broken through, the manufacturing cost and the maintenance cost of the mine car are greatly reduced, the fuel economy of the whole car can be greatly improved, and emission is reduced.

Description

technical field [0001] The invention belongs to the technical field of shift control of a hybrid automatic transmission, and in particular relates to a shift control valve group and a control method for a hybrid transmission of an off-highway mining vehicle. Background technique [0002] With the release of the national non-highway diesel mobile machinery T4 emission standard, the requirements for mining transportation equipment are getting higher and higher, and the national large-scale mining transportation equipment bidding has an urgent demand for large-tonnage mining vehicles. At present, the mechanical gearboxes of traditional large mining vehicles in China are all imported configurations, and the supporting costs and maintenance costs are extremely expensive. [0003] Off-highway mine trucks have a high working intensity, generally operate continuously for 24 hours, and the working environment is harsh. Mine car gearboxes are eroded by sand, dust, and muddy water, re...

AI Technical Summary

Problems solved by technology

If there is an abnormal situation such as interference in the electrical signal, the clutch and brake that are not allowed to operate at the same time will accidentally combine at the same time, resulting in the burning of the shifting elements and the failure of the entire vehicle to move; The impact of other debris can also easily cause the wire harness to break, which will cause the shift solenoid valve to accidentally lose power, the clutch or brake will be separated unexpectedly, and the torque cannot be transmitted, and the whole vehicle will suddenly lose power, causing driving hazards

Images