Deceleration control apparatus and method for automotive vehicle

Abstract

In deceleration control apparatus and method for an automotive vehicle, a deceleration control is performed in accordance with a turning travel situation of the vehicle; and an engine throttle opening angle is controlled gradually in a closure direction at a preset variation degree.

1 . A deceleration control apparatus for an automotive vehicle, comprising: 
 a deceleration controller that performs a deceleration control in accordance with a turning travel situation of the vehicle, the deceleration controller controlling an engine throttle opening angle gradually in a closure direction when starting the deceleration control.    
     
     
         2 . A deceleration control apparatus for an automotive vehicle, comprising: 
 a deceleration controlling section that performs a deceleration control in accordance with a turning travel situation of the vehicle; and    a throttle opening angle controlling section that controls an engine throttle opening angle, the throttle opening angle controlling section controlling the throttle opening angle gradually in a closure direction at a preset variation degree.    
     
     
         3 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 2 , further comprising a variation degree setting section that sets the variation degree of the throttle valve in the closure direction in accordance with a traveling situation of the vehicle.  
     
     
         4 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 3 , further comprising a road surface frictional coefficient detecting section that detects a road surface fictional coefficient of a road surface on which the vehicle is traveling and wherein the variation degree setting section sets the variation degree in such a manner that as the road surface frictional efficient detected by the road surface frictional coefficient becomes higher, the variation degree becomes larger.  
     
     
         5 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 3 , wherein the deceleration controlling section sets a target deceleration in accordance with the turning travel situation of the vehicle and performs the deceleration control to achieve the target deceleration and the variation degree setting section sets the variation degree in such a manner that as the target deceleration becomes larger, the variation degree becomes larger.  
     
     
         6 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 3 , further comprising an accelerator manipulated variable detecting section that detects a manipulated variable of an accelerator pedal and wherein the variation degree setting section sets the variation degree in such a manner that as the manipulated variable of the accelerator pedal detected by the accelerator manipulated variable becomes larger, the variation degree becomes larger.  
     
     
         7 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 3 , further comprising a driving force controlling section that controls an engine throttle opening angle and performs a driving force control to develop a required driving force specified and wherein the variation degree setting section sets the variation degree in such a manner that as the require driving force becomes larger, the variation degree becomes larger.  
     
     
         8 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 2 , wherein the throttle opening angle controlling section controls the throttle opening angle at a first variation degree during a passage of a preset initial interval of time from a time point at which the deceleration control by means of the deceleration control section is started and, after the passage of the initial interval of time, controls the throttle opening angle at a second variation degree smaller than the first variation degree.  
     
     
         9 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 8 , further comprising an accelerator manipulated variable detecting section that detects a manipulated variable of an accelerator pedal and wherein the throttle opening angle controlling section sets the first variation degree to be larger as the manipulated variable of accelerator pedal detected by the accelerator manipulated variable detecting section becomes larger.  
     
     
         10 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 9 , further comprising a driving force controlling section that controls an engine throttle opening angle and performs a driving force control to develop a specified required driving force and the throttle opening angle controlling section sets the first variation degree in such a manner that as the required driving force becomes larger, the first variation degree becomes larger.  
     
     
         11 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 2 , further comprising an accelerator manipulated variable detecting section that detects a manipulated variable of an accelerator pedal and wherein the throttle opening angle controlling section recovers throttle opening angle to a throttle opening angle corresponding to the manipulated variable of the accelerator pedal detected by the accelerator manipulated variable detecting section when the deceleration control section ends the deceleration control.  
     
     
         12 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 2 , further comprising a driving force controlling section that controls an engine throttle opening angle and performs a driving force control to develop the specified required driving force and wherein the throttle opening angle controlling section recovers the throttle opening angle to a throttle opening angle corresponding to the required driving force.  
     
     
         13 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 11 , wherein the throttle opening angle controlling section recovers the throttle opening angle at a preset variation degree.  
     
     
         14 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 13 , further comprising a recovery variation degree setting section that sets the variation degree of the throttle opening angle in a recovery direction in accordance with a traveling situation of the vehicle.  
     
     
         15 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 14 , further comprising a road surface frictional coefficient detecting section that detects a road surface frictional coefficient of a road surface on which the vehicle is traveling and wherein the recovery variation degree setting section sets the variation degree in such a manner that as the road surface frictional coefficient becomes higher, the variation degree becomes larger.  
     
     
         16 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 14 , wherein the deceleration control section sets a target vehicle speed in accordance with the turning travel situation of the vehicle and performs the deceleration control for a traveling speed of the vehicle to be coincident with the target vehicle speed and the recovery variation degree setting section sets the variation degree in such a manner that as an increase rate of the target vehicle speed set by the deceleration control section becomes larger, the variation degree is set to be a larger value.  
     
     
         17 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 2 , wherein the throttle opening angle controlling section controls the throttle opening angle at the variation degree to a complete closure state.  
     
     
         18 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 2 , wherein the throttle opening angle controlling section controls the throttle opening angle to a preset minimum opening angle at the variation degree.  
     
     
         19 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 18 , further comprising a minimum opening angle setting section that sets the minimum opening angle of the throttle valve in accordance with a traveling situation of the vehicle.  
     
     
         20 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 19 , further comprising an accelerator manipulated variable detecting section that detects a manipulated variable of an accelerator pedal and wherein the minimum opening angle setting section sets the minimum opening angle in accordance with the manipulated variable of the accelerator pedal detected by the accelerator manipulated variable detecting section.  
     
     
         21 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 20 , wherein the minimum opening angle setting section sets the minimum opening angle to a preset constant value when the manipulated variable of the accelerator pedal is larger than a preset threshold value and sets the minimum opening angle to a value smaller than the constant value when the manipulated variable of the accelerator pedal is equal to or smaller than the preset threshold value.  
     
     
         22 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 21 , further comprising road surface frictional coefficient detecting section for detecting a road surface frictional coefficient of a road surface on which the vehicle is traveling and wherein the minimum opening angle setting section sets the constant value to a larger value as the road surface frictional coefficient detected by the road surface frictional coefficient detecting section becomes higher.  
     
     
         23 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 21 , wherein the minimum angle setting section sets the constant value to a larger value as a shift ratio of a transmission becomes smaller.  
     
     
         24 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 20 , wherein the minimum opening angle setting section sets the minimum opening angle to a larger value as the manipulated variable of the accelerator pedal becomes larger.  
     
     
         25 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 24 , further comprising a road surface frictional coefficient detecting section that detects a road surface frictional coefficient of a road surface on which the vehicle is traveling and wherein the minimum opening angle setting section sets the minimum opening angle to a larger value as the road surface frictional coefficient becomes higher.  
     
     
         26 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 24 , wherein the minimum opening angle setting section sets the minimum opening angle to be a larger value as a shift ratio of a transmission becomes smaller.  
     
     
         27 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 24 , wherein the minimum opening angle setting section sets the minimum opening angle to a complete closure state when the manipulated variable of the accelerator pedal is equal to or lower than a preset threshold value.  
     
     
         28 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 27 , further comprising a road surface frictional coefficient detecting section that detects a road surface frictional coefficient of a road surface on which the vehicle is traveling and wherein the minimum angle setting section sets the threshold value to a larger value as the road surface frictional coefficient detected by the road surface frictional coefficient detecting section becomes lower.  
     
     
         29 . A deceleration control apparatus for an automotive vehicle as claimed in  claim 27 , wherein the minimum opening angle setting section sets the threshold value to be a larger value as a shift ratio of a transmission becomes larger.  
     
     
         30 . A deceleration control method for an automotive vehicle, comprising: 
 performing a deceleration control in accordance with a turning travel situation of the vehicle; and    controlling an engine throttle opening angle gradually in a closure direction at a preset variation degree.