Oil pressure supply device of driving force distribution device
A technology of distribution device and supply device, which is applied in the direction of transmission device, differential transmission device, control device, etc., can solve problems such as damage, decompression, and unstable behavior of vehicles, so as to reduce the trouble of maintaining the oil pressure supply device and ensure Action-responsive, reliable-release effects
Active Publication Date: 2012-10-17
HONDA MOTOR CO LTD
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Problems solved by technology
However, if the on-off valve fails to open normally due to clogging of foreign matter (dirt), etc., the piston chamber cannot be decompressed, and there is a possibility that the clutch cannot be released.
In the past, there was a problem that when the oil pressure sealing failure of the piston chamber was not performed properly, the driving state of the vehicle remained in the four-wheel drive state, and the vehicle might fall into an unstable behavior.
However, conventional forced discharge valves are not designed to operate by normal oil pressure control action, so they are designed to break down as they operate
Method used
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[0063] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. figure 1 It is a diagram showing a schematic configuration of a four-wheel drive vehicle including a hydraulic supply device of a driving force distribution device according to an embodiment of the present invention. The four-wheel drive vehicle 1 shown in this figure includes: an engine (drive source) 3 mounted horizontally on the front of the vehicle; an automatic transmission 4 integrally provided with the engine 3; and a drive force transmission path 20 for The driving force from the engine 3 is transmitted to the front wheels W1, W2 and the rear wheels W3, W4.
[0064] An output shaft (not shown) of the engine 3 is connected to left and right front wheels W1 , W2 as main drive wheels via an automatic transmission 4 , a front differential 5 , and left and right front drive shafts 6 , 6 . In addition, the output shaft of the engine 3 is connected to the left...
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The invention provides an oil pressure supply device of a driving force distribution device. The oil pressure supply device seals a working oil in a sealed oil pressure loop in an oil path which is connected with a piston chamber of a clutch. When an opening-closing valve in the oil path has a fault and the oil pressure rises unusually, the pressure reduction of the oil path can be carries out, so the part damage can not happen. The oil pressure supply device is provided with a relief valve (70) which can release the oil pressure when the oil pressure of the working oil sealed in the oil path (49) between a check valve (39) and the piston chamber (15) exceeds a preset threshold (PO). When an adhesion fault (the piston chamber oil pressure sealing fault) occurs in a solenoid valve (43) which is arranged in the oil path (sealed oil path) between the check valve (39) and the piston chamber (15), an oil pump (35) is driven, and an oil pressure which is higher than a common regulated pressure is generated by the oil path (49), so the relief valve (70) is forced to work, and consequently the working oil in the oil path (49) can be discharged.
Description
technical field [0001] The present invention relates to an oil pressure supply device for supplying oil pressure for generating a driving force distribution device in a driving force distribution device of a four-wheel drive vehicle that distributes driving force from a prime mover to main driving wheels and auxiliary driving wheels have the engagement pressure of the clutch. Background technique [0002] Conventionally, there are four-wheel drive vehicles that include a drive force distribution device for distributing drive force generated by a drive source such as an engine to main drive wheels and sub drive wheels. In such a four-wheel drive vehicle, for example, in the case where the front wheels are the main drive wheels and the rear wheels are the sub-drive wheels, the drive force generated by the drive source is transmitted to the front wheels via the front drive shaft and the front differential, and is transmitted via the The propeller shaft is transmitted to a driv...
Claims
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IPC IPC(8): B60K17/34F16H48/22
Inventor 手塚朋彦菅野裕须合泰彦
Owner HONDA MOTOR CO LTD