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Vehicle drive control device

A vehicle, limit value technology, applied in the direction of control device, engine control, program control, etc., can solve problems such as poor fuel consumption

Inactive Publication Date: 2012-03-14
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the technique described in the aforementioned Patent Document 1, no consideration is given to minimizing the overall fuel consumption in consideration of acceleration.
For example, when traveling a long distance and accelerating at a constant speed for a short period of time compared with traveling a short distance, the overall fuel consumption can be improved although the fuel consumption during acceleration is worse. In this case, Patent Document 1 does not consider
Furthermore, in the technology described in Patent Document 2, no consideration is given to minimizing the overall fuel consumption in consideration of acceleration.

Method used

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Examples

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no. 1 example

[0063] In the first embodiment, the running mode is calculated so as to minimize the total fuel consumption as described above. Specifically, the ECU 10 calculates a running mode that minimizes the total fuel consumption based on the running target distance when the fuel consumption running mode is selected by the driver and the driver inputs a distance (target distance) as a constraint. That is, under the constraints of the target distance, the ECU 10 calculates the time to reach the destination according to the relationship between the vehicle speed and the acceleration at which the fuel consumption required for the vehicle to advance a unit distance is the minimum when the engine 8 operates according to the fuel consumption optimal line. The best driving mode.

[0064] By performing drive control based on the travel pattern thus calculated, it is possible to minimize the total fuel consumption when traveling the target distance.

[0065] Figure 6 It is a diagram for expl...

no. 2 example

[0083] Next, a second embodiment will be described. In the second embodiment, the difference from the first embodiment is that, in addition to the target distance, the speed at which constant speed running is performed (hereinafter, referred to as "constant speed running speed") is used as a constraint condition to calculate the travel distance. model. Specifically, in the second embodiment, when the driver selects the fuel-efficient driving mode and the driver inputs the target distance and the constant speed as constraints, the ECU 10 calculates that the vehicle satisfies the driving distance when the target distance is driven. The constant-speed running speed is a running mode in which conditions such as constant-speed running is performed and the total fuel consumption is minimized. That is, under the constraints of the target distance and the constant speed, the ECU 10, according to the relationship between the vehicle speed and the acceleration at which the required fue...

no. 3 example

[0091] Next, a third embodiment will be described. In the third embodiment, the difference from the first and second embodiments is that, in addition to the target distance, the travel pattern is calculated using the target arrival time until the target distance is reached as a constraint. Specifically, in the third embodiment, when the fuel economy mode is selected by the driver and the driver inputs the target distance and the target arrival time as constraints, the ECU 10 calculates that the arrival time to the target distance is equal to or less than the target arrival time. And the overall fuel consumption is the smallest driving mode. That is, under the constraints of the target distance and the target arrival time, the ECU 10, according to the relationship between the vehicle speed and the acceleration at which the fuel consumption required by the vehicle to advance a unit distance is the minimum when the engine 8 is operating at the fuel consumption optimal line, and ...

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Abstract

A vehicle drive control device is preferably used, for example, for controlling an internal combustion engine and a transmission. Overall fuel consumption amount calculation means accumulates fuel consumption amounts when a vehicle has travelled a unit distance with a predetermined velocity and a predetermined acceleration, on a time axis in accordance with a target distance so as to calculate an overall fuel consumption amount. Travel pattern calculation means calculates a travel pattern indicating the relationship between the velocity and the acceleration when the vehicle travels the target distance in accordance with the overall fuel consumption amount. By performing control based on the travel pattern thus calculated, it is possible to optimize the overall fuel consumption amount, thereby reducing the actual power consumption.

Description

technical field [0001] The present invention relates to a drive control device for a vehicle. Background technique [0002] Conventionally, various techniques for improving fuel consumption of vehicles have been proposed. For example, Patent Document 1 proposes a technique of dividing a route to a destination and calculating a vehicle speed pattern that minimizes fuel consumption for each divided route. Furthermore, Patent Document 2 proposes a technique of automatically controlling the accelerator opening so as to achieve a fuel-saving accelerator opening. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2008-32542 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2006-336601 [0005] However, in the technique described in the aforementioned Patent Document 1, no consideration is given to minimizing the overall fuel consumption in consideration of acceleration. For example, when traveling a long distance and accelerating at a constant speed for a short ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60W10/06B60W50/00F02D29/02G01C21/34
CPCB60W10/06B60W30/1882B60W50/0098B60W2050/0075B60W2520/10B60W2520/105B60W2556/10F02D28/00F02D29/02G01C21/3469Y02T10/40Y02T10/84
Inventor 山中聪高波阳二本多义行天谷隆之杉山幸慈
Owner TOYOTA JIDOSHA KK