US 9,308,807 B2Granted

Vehicle drive control apparatus, and vehicle drive control method

AssigneeNissan Motor Co., Ltd.

InventorShougo Hane

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Abstract

A total driving force according to an acceleration request of a driver is secured, and deterioration of acceleration performance, such as slowness at the time of starting, is suppressed. When an engine torque is converted into motor torque through a generator, a power distribution ratio α from the engine torque to the motor torque is set. Additionally, as a road surface gradient θ is smaller on an upward slope side, the power distribution ratio α is limited. Specifically, when the road surface gradient θ is more than or equal to a predetermined θ1 on the upward slope side, the power distribution ratio α is set to a predetermined maximum value αMAX. When the road surface gradient θ is less than or equal to θ2, which is smaller than θ1, on the upward slope side, the power distribution ratio α is set to a minimum value αMIN.

Claims3

Dependent claims

A vehicle drive control apparatus, comprising:

an engine configured to drive a main drive wheel;
an electric generator configured to generate electric power with power of the engine;
an electric motor configured to drive an auxiliary drive wheel with the electric power generated by the electric generator;
a gradient detecting unit configured to detect a road surface gradient of an upward slope road;
and
a distribution ratio setting unit configured to set a power distribution ratio of power of the electric motor distributed from the power of the engine, when a part of the power of the engine is distributed to the power of the electric motor through the electric generator,
wherein the power distribution ratio setting unit is configured to set a first power distribution ratio according to an accelerator operation of a driver, set a second power distribution ratio such that as the road surface gradient is smaller, the power distribution ratio is smaller, and set a smaller one of the first power distribution ratio and the second power distribution ratio, as a final power distribution ratio.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/380,275Filed 18 Feb 2013
Priority: JP 2012-04036327 Feb 2012
Published: US 2015/0038286 A15 Feb 2015
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification35 codes

B60K 6/26
Characterised by apparatus, components or means specially adapted for HEVs: characterised by the motors or the generators
B60K 6/448
Series-parallel type: electrical distribution 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
B60L 15/2081
For drive off: for drive off on a slope