US 2014/0195090 A1 · DRIVING FORCE CONTROL SYSTEM FOR VEHICLE

Abstract

A driving force control system for vehicle for controlling a target speed of an engine serving as a prime mover by selecting a control mode based on an index representing a driving preference of a driver. The control mode is selected from a first mode for operating the engine to achieve the target speed while optimizing a fuel economy, and a second mode for operating the engine to achieve the target speed at a speed lower than that achieved while optimizing the fuel economy. The driving force control system is configured to determine a lower limit speed of the engine based on the index provided that the second mode is selected, and to restrict a lower limit value of the target speed of the engine to the lower limit speed in case the target speed of the engine exceeds the lower limit speed under the second mode.

Claims11

Dependent claims

1-6. (canceled)

A driving force control system for vehicle, which is configured to control a target speed of an engine serving as a prime mover by selecting a control mode based on an index representing a driving preference of a driver, from a first mode for operating the engine in a manner to achieve the target speed while optimizing a fuel economy, and a second mode for operating the engine in a manner to achieve the target speed at a speed lower than that achieved while optimizing the fuel economy,

wherein the index is determined based on at least a longitudinal acceleration of the vehicle that is changed by an operation of the driver;
wherein the driving force control system is configured to determine a lower limit speed of the engine based on the index provided that the second mode is selected;
and
to restrict a lower limit value of the target speed of the engine to the lower limit speed based on the current index in case the target speed of the engine exceeds the lower limit speed under the second mode.

1 more element

wherein the index is determined based on at least a longitudinal acceleration of the vehicle that is changed by an operation of the driver;
wherein the driving force control system is configured to determine a lower limit speed of the engine based on the index provided that the second mode is selected;
and
to hold the target speed of the engine to the lower limit speed based on the current index, in case the target speed of the engine exceeds the lower limit speed under the second mode, and then falls below the lower limit speed.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/238,365Filed 20 Sep 2011

Published

10 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

F02D 29/02
Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential…
B60K 31/00
Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle
B60W 10/06
Including control of propulsion units: including control of combustion engines
B60W 30/1882
Controlling power parameters of the driveline, e.g. determining the required power: characterised by the working point of the engine, e.g. by…

Driving force control system for vehicle

Life of this patent

Driving force control system for vehicle

Life of this patent

Abstract

Claims11