US 9,002,562 B2Granted

Vehicle driving system

AssigneeHonda Motor Co., Ltd.

InventorsSatoshi Andou, Masatoshi Noguchi

Life of this patent

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Abstract

A vehicle driving system includes a slip detector that detects an occurrence of excess slipping; an additive/subtractive slip point calculator that time-discretely calculates an additive/subtractive slip point, which is an additive slip point or a subtractive slip point, on the basis detection or non-detection of an occurrence of excess slipping; a cumulative slip point calculator that sequentially calculates a cumulative slip point that is a cumulative sum of values of the additive/subtractive slip point; and a driving mode switcher that switches between a two-wheel driving mode and an all-wheel driving mode on the basis of the cumulative slip point. When excess slipping is detected, the additive/subtractive slip point calculator calculates the additive slip point on the basis of a driving force correlation value that correlates to a driving force a driving wheel for which the excess slipping has occurred.

Claims20

Dependent claims

A vehicle driving system comprising:

a first driving device that drives a first driving wheel that is one of a front wheel and a rear wheel of a vehicle;
a second driving device that drives a second driving wheel that is the other of the front wheel and the rear wheel of the vehicle;
and
a controller that controls the first driving device and the second driving device so as to control a driving mode of the first driving wheel and the second driving wheel, the controller including
a slip detector that detects an occurrence of excess slipping of the first driving wheel or the second driving wheel, the excess slipping being slipping of more than a predetermined amount,
an additive/subtractive slip point calculator unit that time-discretely calculates an additive/subtractive slip point on the basis of detection or non-detection of the occurrence of the excess slipping by the slip detector, the additive/subtractive slip point being an additive slip point or a subtractive slip point,
a cumulative slip point calculator that sequentially calculates a cumulative slip point that is a cumulative sum of values of the additive/subtractive slip point, and
a driving mode switcher that switches between a two-wheel driving mode and an all-wheel driving mode on the basis of the cumulative slip point, the two-wheel driving mode being a driving mode in which only one of the first driving wheel and the second driving wheel is used to drive the vehicle, the all-wheel driving mode being a driving mode in which both the first driving wheel and the second driving wheel are used to drive the vehicle,
wherein, when the slip detector detects the occurrence of the excess slipping, the additive/subtractive slip point calculator calculates the additive slip point on the basis of a driving force correlation value that correlates to a driving force of a driving wheel for which the excess slipping has occurred.

6 more elements

A vehicle driving system comprising:

a first driving device that drives a first driving wheel that is one of a front wheel and a rear wheel of a vehicle;
a second driving device that drives a second driving wheel that is the other of the front wheel and the rear wheel of the vehicle;
and
a controller that controls the first driving device and the second driving device so as to control a driving mode of the first driving wheel and the second driving wheel, the controller including
a slip detector that detects an occurrence of excess slipping of the first driving wheel or the second driving wheel, the excess slipping being slipping of more than a predetermined amount,
an additive slip point calculator that time-discretely calculates an additive slip point on the basis of detection of the occurrence of the excess slipping by the slip detector,
a cumulative slip point calculator that sequentially calculates a cumulative slip point that is a cumulative sum of values of the additive slip point, and
a driving mode switcher that switches between a two-wheel driving mode and an all-wheel driving mode on the basis of the cumulative slip point, the two-wheel driving mode being a driving mode in which only one of the first driving wheel and the second driving wheel is used to drive the vehicle, the all-wheel driving mode being a driving mode in which both the first driving wheel and the second driving wheel are used to drive the vehicle,
wherein, when the slip detector detects the occurrence of the excess slipping, the additive slip point calculator calculates the additive slip point on the basis of a driving force correlation value that correlates to a driving force of a driving wheel for which the excess slipping has occurred.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/056,874Filed 17 Oct 2013
Priority: JP 2012-23084418 Oct 2012
Published: US 2014/0114520 A124 Apr 2014
Granted: 7 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B60K 6/48
Characterised by the architecture of the hybrid electric vehicle: parallel type
B60K 6/52
Architecture of the driveline characterised by arrangement or kind of transmission units: driving a plurality of drive axles, e.g. four-wheel drive
B60K 23/0808
For changing number of driven wheels , for switching from driving one axle to driving two or more axles: for varying torque distribution between…
B60K 28/165
Responsive to, or preventing, spinning or skidding of wheels: acting on elements of the vehicle drive train other than the propulsion unit and…