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Weight-related physical quantity estimating system and control device for vehicles

A technology for inferring devices and physical quantities, which is applied to control devices, measuring devices, vehicle components, etc., and can solve problems such as inability to accurately infer the position of the center of gravity in the front and rear directions

Inactive Publication Date: 2012-03-21
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the conventional estimating device described in the above publication, it is impossible to accurately estimate the front-back direction position of the center of gravity.

Method used

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  • Weight-related physical quantity estimating system and control device for vehicles
  • Weight-related physical quantity estimating system and control device for vehicles
  • Weight-related physical quantity estimating system and control device for vehicles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] figure 1 It is a schematic configuration diagram showing a first embodiment of the vehicle weight-related physical quantity estimation device of the present invention.

[0044] exist figure 1 Among them, 10 denotes a weight-related physical quantity estimation device as a whole, 12FL and 12FR respectively denote left and right front wheels of a vehicle 14 , and 12RL and 12RR respectively denote left and right rear wheels. The left and right front wheels 12FL and 12FR, which are steering wheels, respond to the driver's figure 1 A rack and pinion type power steering device driven by the rotation of the steering wheel not shown in the figure, and steers via tie rods. In addition, the vehicle 14 may be any one of a front-wheel drive vehicle, a rear-wheel drive vehicle, and a four-wheel drive vehicle.

[0045] By increasing or decreasing the braking pressure of the wheel cylinders 18FR, 18FL, 18RR, 18RL by the braking device 16, the braking force of each wheel is increase...

no. 2 example

[0086] Figure 5 It is a schematic configuration diagram showing a second embodiment of the vehicle weight-related physical quantity estimating device in the present invention.

[0087] In this second embodiment, the braking device 16 is configured in the same manner as the braking device 16 of the above-mentioned first embodiment, and by using the braking device 16 to increase or decrease the pressure of the wheel cylinders 18FR, 18FL, 18RR, 18RL Braking pressure, so that the braking force of each wheel is increased or decreased. In addition, the LSPV 32 is provided on the rear wheel duct 24B on the master cylinder 20 side as in the first embodiment described above.

[0088] The driving force of the engine 52 is transmitted to the driving wheels via the automatic transmission 54 to generate the driving force of the vehicle 14 . The output of the engine 52 and the gear ratio of the automatic transmission 54 are controlled by an engine control unit and a transmission control ...

no. 3 example

[0097] Figure 7 It is a schematic configuration diagram showing a third embodiment of the vehicle weight-related physical quantity estimation device in the present invention.

[0098] In this third embodiment, the brake device 16 is basically configured in the same manner as the brake device 16 of the above-mentioned first and second embodiments, but the LSPV 32 is shared by the left and right rear wheels 12RL and 12RR. on the rear wheel with conduit 26R.

[0099] In addition, in the third embodiment, during non-control, that is, when the ignition switch (not shown) is turned off and no current is supplied to the control valve or the like, the brake actuator 22 connects the front wheel conduit 24A to the front wheel 12FL and the front wheel 12FL. The individual ducts 26FR and 26FR of 12FR, and the duct 24B for the rear wheel are connected to the individual ducts 26RL and 26RR of the rear wheels 12RL and 12RR (non-control mode).

[0100] The pressure in the master cylinder c...

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Abstract

Provided are a weight-related physical quantity estimating system and a control device, which are applied to a vehicle including a braking force changing device for changing the relations between the braking force of front wheels and the braking force of rear wheels in accordance with the position of a displacement member which moves in accordance with the supporting load of the rear wheels. On the basis of the braking forces of the front wheels and the rear wheels, the weight-related physical quantity estimating system estimates the supporting load of the rear wheels, and estimates at least one of the longitudinal position of the center of gravity of the vehicle, the supporting load of the front wheels and the total weight of the vehicle, as a physical quantity relating to the weight of the vehicle. Moreover, the control device changes the value to be used for controlling the vehicle, that is, the value to be influenced by the physical quantity relating to the vehicle weight, on the basis of the braking forces of the front wheels and the rear wheels.

Description

technical field [0001] The present invention relates to a weight-related physical quantity estimating device and control device of a vehicle, and more specifically, to an estimating device for estimating a weight-related physical quantity such as the front-rear direction position of the center of gravity of a vehicle, and a method for performing A control device that changes a value that is affected by a physical quantity related to the weight of the vehicle in controlling the vehicle. Background technique [0002] Conventionally, various devices have been proposed for estimating the front-rear direction position of the center of gravity of the vehicle without detecting the support load of each wheel in vehicles such as automobiles. For example, Japanese Patent Application Laid-Open No. 2005-229446 describes a device that calculates the position of the center of gravity in the front-rear direction based on the slip ratio information of the front and rear wheels provided by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T8/171B60K20/02B60T8/30B60W40/13G01G19/03B60W10/10B60W30/02B60W40/12
CPCB60W10/10B60W2520/10B60W2540/16B60T8/30B60W2520/105B60W2510/182G01G19/086B60T8/266B60W2710/182B60W2540/10B60T8/1766B60W40/13B60W2710/0677B60W2510/0604B60W10/04B60W2710/1005B60W10/188B60W30/02B60W2530/10B60W2520/125
Inventor 加藤秀树梶田尚志
Owner TOYOTA JIDOSHA KK
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