HYBRID ELECTRICAL VEHICLE CONTROL SYSTEM AND METHOD

Title:

HYBRID ELECTRICAL VEHICLE CONTROL SYSTEM AND METHOD

Document Type and Number:

WIPO Patent Application WO/2015/032322

Kind Code:

A1

Abstract:

A hybrid electrical vehicle (HEV) control system and method, the control system comprising a transmission device (10), an engine power subsystem (20), a motor power subsystem (30) and a controller (40); the controller (40) enables the HEV to enter a hybrid power economical mode by controlling the engine power subsystem (20) and the motor power subsystem (30); if a detected current gradient signal is below or equal to a gradient lower threshold, and the SOC of a power battery (7) is below or equal to a first electric quantity threshold, or if the current gradient signal is below or equal to the gradient lower threshold, and the maximum allowable discharge power of the power battery (7) is below or equal to a first power threshold, then the controller (40) controls the HEV to operate in a low-power mode. In a parallel connection, the control system enables easy power matching, and provides high conversion efficiency and a high starting point of an engine, effectively reducing fuel consumption and emissions, reducing frequent engine start and stop, thus extending the service life of a starter, reducing noise during vehicle travel, and improving driving comfort.

Inventors:

CHEN HAO (CN)
RUAN OU (CN)

Application Number:

PCT/CN2014/085828

Publication Date:

March 12, 2015

Filing Date:

September 03, 2014

Export Citation:

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Assignee:

BYD CO LTD (CN)

International Classes:

B60W20/00; B60W10/26; B60W40/076; B60W10/06; B60W10/08

Foreign References:

CN102224047A	2011-10-19
CN102126496A	2011-07-20
CN102849064A	2013-01-02
CN102180169A	2011-09-14
US20070293994A1	2007-12-20

Other References: