Patent ID: 9669808
Date: 2017-06-06
CPC Classifications: B60L,B60T,B60W,Y02T

Claim:
1. A vehicle control apparatus comprising: a driver support system ECU including an application program which supports a driver's driving operation, and outputting a required driving force corresponding to a deceleration degree required by the application program and an allowable upper limit rotation number in the rotation number of the driving source, an engine ECU performing an engine brake changing a deceleration ratio, which is a rotation number ratio of driving wheels with respect to the rotation of a driving source according to the required driving force and the upper limit rotation number output by the driver support system ECU, a brake ECU performing any one of a mechanical brake, which converts a kinetic energy of a driving wheel rotation into a thermal energy using friction, and a regeneration brake, which converts the kinetic energy of the driving wheel rotation into an electric energy using regeneration, during a vehicle deceleration of a vehicle, in conjunction with the engine brake, wherein the engine ECU can change the deceleration ratio with a continuously variable stage, and assumes that characteristics of the rotation number of the driving source with respect to a deceleration degree are linear shape, and determines the deceleration ratio from a target rotation number of the driving source, and performs the engine brake according to the required driving force output by the driver support system ECU by a target rotation number equal to or lower than the upper limit rotation number, wherein the brake ECU, compensates for an insufficient deceleration degree by performing at least one of the mechanical brake and the regeneration brake in conjunction with the engine brake, when the deceleration degree by the engine brake is insufficient compared to the deceleration degree according to the required driving force, and wherein the brake ECU during the engine brake, continues the engine brake without performing the mechanical brake and the regeneration brake, after the rotation number of the driving source reaches the upper limit rotation number, and thereafter performs any one of the mechanical brake and the regeneration brake.