Electrified vehicle and method of controlling same
US-2024424930-A1 · Dec 26, 2024 · US
Torque distribution apparatus, torque distribution method, torque distribution value generation method, and program
US8935032B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8935032-B2 |
| Application number | US-201114000293-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 18, 2011 |
| Priority date | Feb 18, 2011 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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A torque distribution apparatus acquires an instructed torque input and a motor efficiency map for motors; detects vehicular speed and drive wheel rotational speed; calculates based on the detected speeds, a relational expression of drive wheel slip rate and a friction coefficient; creates based on the relational expression, a performance curve expression indicating relations between torque and the drive wheel rotational speed, superimposes the performance curve expression on the motor efficiency map, creates an efficiency variation expression indicating for each vehicular speed, the torque and efficiency values of the motor efficiency map, and calculates a torque that optimizes efficiency from the efficiency variation expression; calculates based on the instructed torque and the torque optimizing efficiency, a torque distribution value for each motor; and controls torque distribution to each motor, within a range of the slip rate being 0 to 0.2 and based on the torque distribution values.
First claim
Opening claim text (preview).
The invention claimed is: 1. A torque distribution apparatus distributes an input instructed torque to motors connected to drive wheels, the torque distribution apparatus comprising: an instructed torque acquiring unit that acquires the instructed torque input; an efficiency map acquiring unit that acquires a motor efficiency map that corresponds to the motors; a vehicular speed detecting unit that detects vehicular speed of a vehicle equipped with the motors; a drive wheel…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Cross-Sectional Technologies · mapped topic
Cross-Sectional Technologies · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US8935032B2 cover?
- A torque distribution apparatus acquires an instructed torque input and a motor efficiency map for motors; detects vehicular speed and drive wheel rotational speed; calculates based on the detected speeds, a relational expression of drive wheel slip rate and a friction coefficient; creates based on the relational expression, a performance curve expression indicating relations between torque and…
- Who is the assignee on this patent?
- Kato Masahiro, Muramatsu Eiji, Kawabata chihiro, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification B60L15/20. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).