Vehicle drive force control apparatus

Abstract

A vehicle drive force control apparatus is provided with a mechanism for continuously varying the rotation speed of an engine and with basic control characteristics for controlling the mechanism such that the engine rotation speed becomes a rotation speed with good fuel efficiency. An index that indicates a request for sharper behavior of the vehicle is determined on the basis of the actual behavior of the vehicle or the amount of an operation for causing such behavior by the driver. An upper limit value for the engine rotation speed in the case where a drive request amount is increased is set in accordance with the index. The upper limit value is increased as the value of the index is such that the sharpness of the behavior of the vehicle is increased.

Description

technical field [0001] The present invention relates to a device for controlling driving force of a vehicle, and more particularly to a device for controlling a driving force source based on a driver's driving intention (taste or will). Background technique [0002] The driving force in the vehicle can be appropriately set according to the output of the engine relative to the accelerator opening and the gear ratio of the transmission connected to the engine, etc., and can usually be determined in advance according to the grade of the vehicle in the planning and design stage. In reality, however, the required driving force differs depending on the preference of the driver driving the vehicle, road conditions, etc., so it is desirable that the driving force characteristics and shift characteristics can be changed according to the driving situation of the vehicle and the driver's request. [0003] Therefore, for example, International Publication No. 2011 / 021634 discloses a dev...

AI Technical Summary

Problems solved by technology

As a result, in the past, when a vehicle with a so-called continuously variable transmission function is greatly accelerated, the engine speed reaches the maximum speed allowed by the vehicle. As a result, not only the amount of change in the engine speed becomes large, but also the speed between these speeds is set, or the engine cannot be operated at the operating point of the so-called intermediate speed.

In addition, the engine speed when the accelerator operation is greatly performed remains at the above-mentioned maximum speed regardless of the degree of the accelerator operation amount, which may cause a so-called sticky feeling.

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