阅读说明：本技术 车辆控制装置 (Vehicle control device ) 是由 大岛达也 西村伸之 于 2018-05-10 设计创作，主要内容包括：对具备变速器的车辆进行控制以使该车辆以规定的设定速度行驶的车辆控制装置,其中该变速器具有直接连接齿轮和包含齿轮比小于直接连接齿轮的齿轮即超速齿轮的通常齿轮,所述车辆控制装置包括：行驶区间确定部,其确定道路坡度与车辆行驶中的当前行驶区间不同的行驶区间即前方行驶区间；当前挡位选择部,其基于车辆的行驶阻力选择当前行驶区间中的变速器的挡位即当前挡位；前方挡位选择部,其基于前方行驶区间中的车辆的行驶阻力的推定值,选择前方行驶区间中的变速器的挡位即前方挡位；以及换挡控制部,其以设定速度与车辆的速度的差在规定范围内为条件,在车辆到达前方行驶区间时将变速器的挡位变更为前方挡位选择部选择的挡位。(A vehicle control device that controls a vehicle equipped with a transmission having a direct-connected gear and a normal gear including an overdrive gear that is a gear having a gear ratio smaller than that of the direct-connected gear so that the vehicle travels at a predetermined set speed, the vehicle control device comprising: a travel section determination unit that determines a forward travel section that is a travel section having a road gradient different from a current travel section in which the vehicle is traveling; a current gear selection unit that selects a current gear that is a gear of the transmission in a current travel section based on a travel resistance of the vehicle; a forward range selection unit that selects a forward range, which is a range of the transmission in the forward travel range, based on an estimated value of travel resistance of the vehicle in the forward travel range; and a shift control unit that changes the shift range of the transmission to the shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that a difference between the set speed and the speed of the vehicle is within a predetermined range.)

1. A vehicle control device for controlling a vehicle equipped with a transmission so that the vehicle travels at a predetermined set speed,

the transmission, comprising:

a direct connection gear directly connecting the input shaft with the output shaft, wherein the power of the engine input through the input shaft is transmitted to the output shaft without passing through the counter shaft, and

a normal gear that transmits power of the engine to the output shaft through the counter shaft; the normal gear includes a gear having a gear ratio smaller than that of the direct connection gear, i.e., an overdrive gear;

the vehicle control apparatus includes:

a travel section determination unit that determines a forward travel section that is ahead in a forward direction of the vehicle and has a road gradient different from a current travel section in which the vehicle is traveling,

a current gear selection section that selects a current gear that is a gear of the transmission in the current travel section in accordance with a travel resistance of the vehicle,

a forward range selection unit that selects a forward range, which is a range of the transmission in the forward travel range, and a forward range, which is an estimated travel resistance of the vehicle in the forward travel range based on a road gradient of the forward travel range and a speed of the vehicle, in the forward travel range

And a shift control unit that changes the shift range of the transmission to the forward shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that a difference between the set speed and the speed of the vehicle is within a predetermined range.

2. The vehicle control apparatus according to claim 1,

the shift control unit changes the shift range of the transmission to the forward shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that an auto-cruise speed set in the vehicle is the set speed and a difference between the set speed and the speed of the vehicle is within the predetermined range.

3. The vehicle control apparatus according to claim 1,

the shift control unit changes the shift range of the transmission to the forward shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that a speed governor speed preset in the vehicle is the set speed and a difference between the set speed and the speed of the vehicle is within the predetermined range.

Technical Field

The present disclosure relates to a vehicle control device, and more particularly to a technique for selecting a shift position of a transmission mounted on a vehicle.

Background

A technique has been proposed in which the driving force of the vehicle on the travel route is estimated from road information on the travel route from the current position of the vehicle to the target position, and the estimated driving force is compared with a fuel consumption map stored in advance, thereby setting a gear shift plan in which the fuel consumption amount on the travel route is minimum (see patent document 1).

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese laid-open patent publication No. 9-21457

Disclosure of Invention

[ problems to be solved by the invention ]

There are large-sized vehicles such as trucks and buses that are equipped with a Transmission called an Automated Manual Transmission (hereinafter referred to as "AMT"). The AMT is a transmission in which a sleeve in a conventional manual transmission is moved by an actuator to automatically shift a shift position of the transmission.

The final driving force of the vehicle depends on the gear selected in the AMT. Here, the AMT includes a plurality of gears, and the resistance to engagement differs for each shift position. The difference in the resistance to engagement in the gear position affects the fuel consumption of the engine mounted on the vehicle. Therefore, there is a room for improvement in the technology for selecting a shift range according to the fuel consumption of the vehicle.

An object of the present disclosure is to provide a vehicle control device that can improve a selection technique of a shift position in a vehicle equipped with an automatic manual transmission.

[ means for solving the problems ]

A vehicle control device according to the present disclosure controls a vehicle including a transmission to travel at a predetermined set speed, the transmission including: a direct connection gear directly connecting an input shaft to an output shaft, the power of the engine input through the input shaft being transmitted to the output shaft without passing through a counter shaft; and a normal gear that transmits power of the engine to the output shaft through the counter shaft; the normal gear includes a gear having a gear ratio smaller than that of the direct connection gear, i.e., an overdrive gear. The vehicle control apparatus includes: a travel section determination unit that determines a forward travel section that is ahead in a travel direction of the vehicle and has a road gradient different from a current travel section in which the vehicle is traveling; a current gear selection unit that selects a current gear that is a gear of the transmission in a current travel section according to a travel resistance of a current vehicle; a forward range selection unit that selects a forward range, which is a range of the transmission in the forward travel range, based on a travel resistance of the vehicle in the forward travel range estimated based on a road gradient of the forward travel range and a speed of the vehicle; and a shift control unit that changes the shift range of the transmission to the forward shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that a difference between the set speed and the speed of the vehicle is within a predetermined range.

The shift control unit may change the shift range of the transmission to the forward shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that an auto-cruise speed set in the vehicle is the set speed and a difference between the set speed and the speed of the vehicle is within the predetermined range.

The shift control unit may change the shift range of the transmission to the forward shift range selected by the forward shift range selection unit when the vehicle reaches the forward travel range, on the condition that a speed governor speed preset in the vehicle is the set speed and a difference between the set speed and the speed of the vehicle is within the predetermined range.

Effects of the invention

According to the vehicle control device of the present disclosure, it is possible to improve the technology of selecting a shift position in a vehicle equipped with an automatic manual transmission.

Drawings

Fig. 1 is a diagram for explaining an outline of a vehicle according to an embodiment.

Fig. 2 is a diagram schematically showing an internal configuration of a vehicle according to the embodiment.

Fig. 3 is a diagram schematically showing a functional configuration of a vehicle control device according to an embodiment.

Fig. 4 is a diagram schematically showing an example of an equivalent fuel consumption rate map (equivalent fuel consumption power マ ッ プ) of an engine according to the embodiment.

Fig. 5A is a diagram schematically showing an example of an iso-specific map of a direct-coupled gear.

Fig. 5B is a diagram schematically showing an example of an iso-specific map of a normal gear.

Detailed Description

< brief summary of the embodiments >

Fig. 1 is a diagram for explaining an outline of a vehicle V according to the embodiment. Referring to fig. 1, an outline of a vehicle V of the embodiment is described. The vehicle V of the embodiment is a large vehicle equipped with an AMT using an engine such as a diesel engine as a driving force.

In recent years, computing devices such as an ECU (Electronic Control Unit) mounted on a vehicle have been widely used to improve fuel consumption of the vehicle by automatically selecting a shift position of a transmission while the vehicle is running against running resistance. As will be described in detail later, with respect to the selection of the shift range in the vehicle, a shift range that improves the fuel consumption of the vehicle, from among shift ranges that can generate a resistance against the running of the vehicle, is selected with reference to the map of the fuel consumption rate equivalent to that of the engine.

During vehicle travel, the acceleration of the vehicle is proportional to the amount obtained by subtracting the travel resistance of the vehicle from the driving force of the vehicle, and inversely proportional to the weight of the vehicle. Therefore, the ECU mounted on the vehicle estimates the running resistance of the vehicle from the driving force of the vehicle amount, the weight of the vehicle, and the acceleration of the vehicle, and selects a shift position capable of generating torque to overcome the running resistance. However, when the ECU estimates the running resistance using the acceleration of the vehicle, the ECU can estimate the running resistance of the vehicle at the current running position, but cannot estimate the running resistance at a position ahead of the current running position.

When the ECU determines the running resistance by estimation, the accuracy of calculation of the running resistance is not necessarily high. Therefore, even if the gear is selected based on the running resistance that does not necessarily ensure accuracy, it is not necessarily ensured that the selected gear is a gear that improves the fuel consumption of the vehicle. Therefore, the ECU of the vehicle V according to the embodiment estimates the running resistance in the front position by acquiring the gradient information of the road at the position ahead of the position currently running. Hereinafter, a method of acquiring gradient information and estimating the running resistance in the front position by the vehicle V according to the embodiment will be described.