Control device and control method for vehicle

Abstract

An ECU executes a program including the steps of: setting a first throttle opening degree (SlOO), setting a low gear torque LTE based on an engine torque map for low gear having the first throttle opening degree and an engine speed (rpm) as parameters (S200), setting a high gear torque HTE based on an engine torque map for high gear having the first throttle opening degree and the engine speed as parameters (S300), setting a target engine torque TTE by combining the low gear torque LTE and the high gear torque HTE by using a correction ratio KGR determined by a gear step (S400), and controlling the engine to produce a required torque set by using the target engine torque TTE (S700). In this way a torque can be obtained in accordance with the engine speed.

Description

technical field [0001] The present invention relates to a control device and a control method for a vehicle; and, more particularly, to a technique for controlling a vehicle to output torque determined in accordance with the rotational speed (rpm) of an output shaft of a power source . Background technique [0002] Generally, vehicles are known that have an electronic throttle valve driven by an electric motor. The opening degree of the electronic throttle valve, that is, the throttle valve opening degree is controlled in accordance with the operation amount of the accelerator. In such a vehicle with an electronic throttle, there has been proposed an engine control technique in which a target torque of the engine is set based on an accelerator operation amount, and then the throttle valve opening is set in accordance with the target torque to control engine. [0003] Japanese Patent Application Publication No. 2002-195087 (JP-A-2002-195087) describes an engine control dev...

AI Technical Summary

Problems solved by technology

[0005] However, in the engine control unit described in JP-A-2002-195087, in which the target engine torque is to be corrected, if the target engine torque is small, the corrected target engine torque may be insufficient

In this case, it is difficult to know whether the corrected target engine torque, that is, the actual output torque, does vary depending on the engine speed

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