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Gear assembly and gear oil composition

A kind of gear oil and gear technology, applied in gear lubrication/cooling, belt/chain/gear, petroleum industry, etc., can solve problems such as low efficiency of vehicle operation, viscous resistance and agitation loss

Active Publication Date: 2015-04-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High viscosity gear oils, on the other hand, produce viscous drag and churning losses that result in inefficient vehicle operation

Method used

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  • Gear assembly and gear oil composition
  • Gear assembly and gear oil composition

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Embodiment Construction

[0032] The following description of the embodiments is merely exemplary in nature and in no way intended to limit the invention, its application or uses.

[0033] One embodiment may include a gear assembly comprising at least one pair of meshing gears enclosed in a gear case comprising an oil sump portion and a wall portion. A gear oil mixture may be provided at least in the sump portion. One or more gears of the assembly are at least partially immersed in gear oil. The gear oil mixture contains a coolant that has an endothermic liquid / vapor transition between low and high operating temperatures of the gear assembly.

[0034] In the rear axle section of the car, the propeller drive shaft is connected to a gear that meshes with other gears enclosed in a gearbox. The gears are directly connected or coupled to the axles of the rear wheels. With this exemplary gear assembly, the propeller drive shaft is able to transmit the necessary torque to drive the rear wheels of the motor...

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Abstract

One embodiment may include a gear assembly comprising at least one pair of meshing gears situated inside a gear case having a sump portion and a wall portion. A gear oil mixture may be disposed at least in the sump portion. At least one gear is immersed partially or fully in the oil mixture. The oil mixture comprises a hydrocarbon oil base and a coolant having an endothermic liquid / vapor transition at a temperature between the lower and upper operating temperatures of the gear assembly.

Description

technical field [0001] The present application relates generally to the field including gear assemblies and gear oils. Background technique [0002] Gear oils are commonly used in transmissions, transfer cases and differentials in cars, trucks and other machines. Gear oils typically have a higher viscosity to better protect gears from wear, corrosion and heat damage. Since there is no oil pump, gear oil can be drawn through a portion of the lowest gear submerged in the oil sump and delivered to the rest of the train by the rotational action of the gears. High viscosity gear oils, on the other hand, produce viscous drag and churning losses that result in inefficient vehicle operation. Contents of the invention [0003] One embodiment may include a gear oil blend comprising a hydrocarbon oil base and a coolant that has an endothermic (liquid to vapor) phase transition at temperatures between the high and low operating temperatures of the gear oil. In another embodiment, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M129/06C10M129/16C10M129/00C10M141/10C10M141/12C10M161/00F16H57/04C10N40/04
CPCC10M2205/173C10M2207/0215F16H57/0457C10M2207/0406C10M171/005C10M2211/022C10M171/002C10N2240/04F16H57/0483Y10T74/2188C10M2205/0285C10M2207/0225Y10T74/2189C10M2203/1006F16H57/0417C10N2240/046C10N2040/04C10N2040/046
Inventor G.莫尔杜霍维奇J.L.林登A.M.曼斯
Owner GM GLOBAL TECH OPERATIONS LLC