JP2010274687A - Controller for hybrid vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve energy efficiency of a whole vehicle. <P>SOLUTION: A controller 10 for a hybrid vehicle 1 includes: a current position calculating section 38 for detecting a position of an own vehicle; a map data storing section 34 for storing map data having setting position information of charging facility capable of charging a battery 16; a route calculating section 39 for acquiring route information from the current position of the own vehicle to a destination; a remaining capacity detecting section 41 for detecting the remaining capacity of the battery 16; and an output calculating section 42 for calculating power consumption amount in the case where the own vehicle travels from the current position of the own vehicle to the destination by power of each motor 12, 14 based on the route information, and controlling operation of an internal combustion engine 11 and each motor 12, 14 so as to set the remaining amount as zero at reaching the destination in the case where the power consumption amount is greater than the remaining amount and the charging facility is prepared in the destination. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a control device for a hybrid vehicle.

Conventionally, for example, when the cruising distance corresponding to the remaining capacity of the in-vehicle battery is shorter than the distance to the destination, the route search device for an electric vehicle (for example, setting a guidance route to the destination via the charging station (for example, Patent Document 1) is known.
In addition, conventionally, for example, when an information on the remaining capacity of the in-vehicle battery transmitted from the in-vehicle terminal is received, an electric center provided with a management center that transmits information for guiding a power supply stand, a store of a detachable battery, and the like to the electric vehicle. 2. Description of the Related Art An automobile battery management system (see, for example, Patent Document 2) is known.
In addition, conventionally, for example, when a generator that charges an in-vehicle battery, an internal combustion engine that drives the generator, and a traveling motor that is powered by the in-vehicle battery are provided, the destination cannot be reached due to the remaining capacity of the in-vehicle battery. A navigation system for an electric vehicle that displays a charging facility that can be reached, or drives an internal combustion engine in an area where the operation of the internal combustion engine is allowed to charge an in-vehicle battery by power generation of the generator (see, for example, Patent Document 3) It has been known.

JP-A-10-170293 JP 2000-102103 A JP-A-8-240435

By the way, in the electric vehicle which concerns on the said prior art, when charging a vehicle-mounted battery in the electric power feeding facility which exists in the middle of the path | route to the destination, the problem that the time required to reach | attain a destination becomes long. Occurs.
Moreover, in the electric vehicle according to the above-described conventional technology, in the configuration in which the generator for charging the in-vehicle battery is driven by the internal combustion engine, the in-vehicle battery is forcibly charged until it is fully charged or power generation during traveling is continued. . In other words, even though there is a power supply facility at the destination, it is necessary to ensure the remaining capacity so that the vehicle can always be driven by the on-board battery, and the internal combustion engine operation and on-vehicle battery charging are excessive. Therefore, there arises a problem that the fuel consumption accompanying the operation of the internal combustion engine increases.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hybrid vehicle control device capable of improving the energy efficiency of the entire vehicle.

  In order to solve the above problems and achieve the object, a hybrid vehicle control apparatus according to a first aspect of the present invention includes an internal combustion engine (for example, the internal combustion engine 11 in the embodiment) as a power source of the vehicle, and A generator motor (for example, the front motor 12 and the rear motor 14 in the embodiment), a capacitor (for example, the battery 16 in the embodiment) that exchanges electric energy with the generator motor, and a household outlet to the capacitor. A hybrid vehicle control device comprising a plug-in means for charging (for example, the charger 16a in the embodiment), and a vehicle position detecting means for detecting the position of the own vehicle (for example, in the embodiment) Current position calculation unit 38), destination setting means for setting a destination (for example, route calculation unit 39 in the embodiment), and the storage by the plug-in means. Storage means (for example, the map data storage unit 34 in the embodiment) for storing the map information having the installation position information of the charging facility capable of charging the battery, and the route information from the position of the host vehicle to the destination Route information acquisition means (for example, the route calculation unit 39 in the embodiment also serves as) and remaining capacity detection means for detecting the remaining capacity of the battery (for example, remaining capacity detection unit 41 in the embodiment) And, based on the route information, a power consumption calculation means for calculating a power consumption when traveling from the position of the host vehicle to the destination by the power of the generator motor (for example, an output calculation unit in the embodiment) 42) and when the power consumption is larger than the remaining capacity and the charging facility is installed at the destination, the remaining capacity becomes zero when the destination is reached. Before And control means for controlling the operation of the internal combustion engine and the generator motor (e.g., serving also as the output calculation section 42 in the embodiment).

  Further, in the hybrid vehicle control device according to the second aspect of the present invention, the control means divides a route from the position of the host vehicle to the destination into a plurality of sections, and the internal combustion engine is divided into the sections. The amount of fuel consumed when the vehicle travels with the power of is calculated, and the power of the section where the fuel consumption is large is used as the generator motor.

According to the control apparatus for a hybrid vehicle according to the first aspect of the present invention, the remaining capacity of the battery becomes zero when reaching the destination where the charging facility is installed, so that the internal combustion engine and the generator motor are operated. By controlling the above, it is possible to reduce fuel consumption in the internal combustion engine.
In addition, at the destination, the battery can be charged from a state where the remaining capacity of the capacitor is zero, the life of the capacitor can be extended, and the power of the generator motor is used when the vehicle is restarted. The fuel consumption at can be further reduced.
In addition, when the destination is a commuting office or a home when returning home, there is a high possibility that a longer parking time will be secured than the charging time required to fully charge the battery. Fully charged easily.

  Furthermore, according to the hybrid vehicle control device of the second aspect of the present invention, even if it is not possible to travel on the route from the position of the host vehicle to the destination by only the power of the generator motor, the fuel consumption The power distribution in the section with a large amount is set as the generator motor, and the power in the section where the operation efficiency of the internal combustion engine is high is set as the internal combustion engine. Thereby, the energy efficiency as the whole vehicle at the time of route travel can be improved.

It is a block diagram of the control apparatus of the hybrid vehicle which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the control apparatus of the hybrid vehicle which concerns on embodiment of this invention.

Hereinafter, a control apparatus for a hybrid vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.
A hybrid vehicle 1 according to an embodiment of the present invention includes, for example, a front wheel in which an internal combustion engine (E) 11, a front motor (FMG) 12, and a transmission (T / M) 13 are directly connected in series as shown in FIG. A drive system and a rear wheel drive system having a rear motor (RMG) 14 are provided.
In the front wheel drive system, the driving forces of both the internal combustion engine 11 and the front motor 12 are distributed and transmitted to the left and right front wheels via the transmission 13 and the differential (FD). In the rear wheel drive system, the driving force of the rear motor 14 is transmitted to the rear wheels via a differential (RD) that distributes the driving force between the left and right rear wheels Wr and Wr.
When the driving force is transmitted from the wheel side to the motors 12 and 14 during deceleration of the hybrid vehicle 1, the motors 12 and 14 function as generators to generate a so-called regenerative braking force, and the kinetic energy of the vehicle body. Is recovered as electrical energy. Furthermore, the front motor 12 is driven as a generator by the output of the internal combustion engine 11 according to the operating state of the hybrid vehicle 1 to generate power generation energy.

Each motor 12, 14 is connected to a power drive unit (PDU) 15 that controls driving and power generation.
The power drive unit 15 includes, for example, a PWM (pulse width modulation) inverter that includes a bridge circuit formed by a bridge connection using a plurality of transistor switching elements.

The power drive unit 15 is connected to a battery 16 that exchanges power with the motors 12 and 14.
The battery 16 includes a charger 16a for charging the battery 16 from a household outlet. And the battery sensor 16b which detects the charging current and discharge current of the battery 16, the voltage between terminals, and temperature, and outputs the signal of each detection result is provided.

The control device 10 of the hybrid vehicle 1 includes, for example, a navigation system 21, a processing device 22, a battery ECU 23, a motor ECU 24, and an engine ECU 25.
The battery ECU 23 controls, for example, a connection state between the battery 16 and the power drive unit 15.
Further, the motor ECU 24 controls the operations of the motors 12 and 14 via the power drive unit 15.
The engine ECU 25 controls the operation of the internal combustion engine 11.

  The navigation system 21 includes, for example, a positioning signal receiver 31, a vehicle state sensor 32, a traffic information receiver 33, a map data storage unit 34, an input device 35, a monitor 36, a speaker 37, and a processing device 22. Are provided with a current position calculation unit 38 and a route calculation unit 39.

The positioning signal receiver 31 receives a positioning signal such as a GPS (Global Positioning System) signal for measuring the position of the vehicle using an artificial satellite, for example.
The vehicle state sensor 32 includes, for example, a vehicle speed sensor that detects the speed (vehicle speed) of the host vehicle, an acceleration sensor that detects acceleration acting on the vehicle body, a gyro sensor that detects the posture and traveling direction of the vehicle body, and a yaw rate (vehicle And a yaw rate sensor for detecting the rotational angular velocity of the center of gravity about the vertical axis), and outputs signals of detection results of various types of vehicle information of the host vehicle.
The traffic information receiver 33 receives, for example, optical signals and radio signals transmitted from beacon devices arranged on FM multiplex broadcasting or on the road, and acquires traffic information such as VICS (Vehicle Information and Communication System) information. To do.

The map data storage unit 34 stores map data. Map data includes, for example, topographical map data, polygon data corresponding to various facilities and districts and lakes, character data such as names corresponding to each polygon, various symbol data, and road data And track data.
As the various facilities, at least a facility having a charging facility capable of charging the battery 16 via the charger 16a is provided, and the position information (installation position information) of the facility is included in the polygon data.
The road data is information such as road connection state and shape, for example, a node (that is, a coordinate point for grasping the road shape) and a link that is a line connecting each node, and a distance between each link And data such as road type, width, intersection angle, gradient, and shape.

  The processing device 22 includes, for example, a current position calculation unit 38, a route calculation unit 39, a remaining capacity detection unit 41, and an output calculation unit 42.

The current position calculation unit 38 calculates the current position of the host vehicle by a positioning signal such as a GPS signal or by an autonomous navigation calculation process based on detection signals such as the yaw rate and the vehicle speed of the host vehicle.
The route calculation unit 39 sets a destination according to, for example, an input operation of the operator with respect to the input device 35, and the destination, the current position of the host vehicle, the map data stored in the map data storage unit 34, and the like. Based on the above, a route search from the current position of the host vehicle to the destination is executed. Then, information such as the road state and traffic information related to the calculated route is acquired.

  The remaining capacity detection unit 41 detects the remaining capacity SOC of the battery 16 by, for example, a current integration method. In this current integration method, the charge current and discharge current of the battery 16 are integrated every predetermined period to calculate the integrated charge amount and integrated discharge amount, and these integrated charge amount and integrated discharge amount are set in the initial state or immediately before the start of charge / discharge. The remaining capacity SOC is calculated by adding or subtracting the remaining capacity. Then, for example, a predetermined correction process for an internal resistance that varies depending on the temperature of the battery 16 or a predetermined correction process corresponding to the voltage between the terminals is performed.

The output calculation unit 42 uses the power of the motors 12 and 14 based on the route calculated by the route calculation unit 39 and information on the road state (gradient and the like) and traffic state (congestion and the like) on the route. The power consumption (all process travel energy Pcy) when traveling from the current position of the host vehicle to the destination is calculated.
When the remaining capacity SOC of the battery 16 is equal to or greater than the total process travel energy Pcy, a command signal is output to instruct the travel of the entire path by the power of the motors 12 and 14.
Further, when the remaining capacity SOC of the battery 16 is smaller than the total process travel energy Pcy, the remaining capacity SOC is made zero when reaching the destination having the facility equipped with the charging facility capable of charging the battery 16. Thus, the operation of the internal combustion engine 11 and the motors 12 and 14 is controlled. In this case, the output calculation unit 42 sets the power in the section where the fuel consumption is large as the motors 12 and 14 and sets the power in the section where the operation efficiency of the internal combustion engine 11 is high as the internal combustion engine 11. 14 and the distribution of the operating section between the internal combustion engine 11 are set.

For example, when the remaining capacity SOC is smaller than the total process travel energy Pcy, for example, as shown in Table 1 below, the output calculation unit 42 displays the route calculated by the route calculation unit 39 in a plurality of sections (for example, section 1). ,..., Section n, etc.), and for each section, the fuel consumption (for example, section fuel consumption A1,..., An) and the power of the motors 12 and 14 when traveling by the power of the internal combustion engine 11 To calculate power consumption (for example, section travel energy E1,..., En) when traveling.
Then, the section traveling energy is added in the order of the section having the largest section fuel consumption, and a section that contributes to the added energy when the added energy obtained by this addition becomes maximum in the range of the remaining capacity SOC or less is extracted. Then, the extracted section is set as a motor travel section that travels by the power of the motors 12 and 14, and another section that does not contribute to the added energy is set as an engine travel section that travels by the power of the internal combustion engine 11.

  The output calculation unit 42 sets a section based on, for example, a road data node when the route is divided into a plurality of sections, but is not limited thereto, for example, an appropriate region, distance, travel time, Sections may be set based on the time zone during travel, the type of road (general road, highway, etc.), traffic conditions (such as traffic jams), and travel conditions (city driving, suburban driving, etc.).

The control device 10 of the hybrid vehicle 1 according to the present embodiment has the above-described configuration. Next, the operation of the control device 10 of the hybrid vehicle 1, particularly each route on the route from the current position of the vehicle to the destination. A process for setting the distribution of the operation sections between the motors 12 and 14 and the internal combustion engine 11 will be described.
Note that the processing described below is repeatedly executed at predetermined time intervals, and calculation is performed while updating various types of information on the route to the destination at the time of execution of each processing.

First, for example, in step S01 shown in FIG. 3, it is determined whether or not a destination is set.
If this determination is “NO”, the flow proceeds to the end.
On the other hand, if this determination is “YES”, the flow proceeds to step S 02.
Next, in step S02, it is determined whether or not there is a facility having a charging facility capable of charging the battery 16 via the charger 16a at the destination.
If this determination is “NO”, the flow proceeds to the end.
On the other hand, if the determination is “YES”, the flow proceeds to step S03.

Next, in step S03, it is determined whether or not there is an operation input of an operator who permits execution of the distribution of the operation sections of the motors 12 and 14 and the internal combustion engine 11 on the route.
If this determination is “NO”, the flow proceeds to the end.
On the other hand, if this determination is “YES”, the flow proceeds to step S 04.
Next, in step S04, the remaining capacity SOC of the battery 16 is calculated.
Next, in step S05, a route from the current position to the destination is calculated, and traffic information related to this route is acquired, and information on the vehicle state of the host vehicle is acquired.

  Next, in step S06, based on the calculated route and information on the road condition (gradient, etc.) and traffic condition (congestion, etc.) on this route, the current power of the own vehicle by the power of each motor 12, 14 is obtained. The power consumption (all process travel energy Pcy) when traveling from the position to the destination is calculated.

Next, in step S07, it is determined whether or not the remaining capacity SOC of the battery 16 is greater than or equal to the total process travel energy Pcy.
If this determination is “YES”, the flow proceeds to step S 08, in which the entire route process is instructed to be driven by the power of the motors 12 and 14, and the flow proceeds to the end.
On the other hand, if this determination is “NO”, the flow proceeds to step S 09.

Next, in step S09, the calculated route is divided into a plurality of sections, and for each section, the fuel consumption when traveling by the power of the internal combustion engine 11 (section fuel consumption) and the motors 12, 14 The power consumption (section travel energy) when traveling by power is calculated.
Next, in step S10, the section traveling energy is added in the order of the section with the largest section fuel consumption, and the section that contributes to the added energy when the added energy obtained by this addition becomes maximum in the range of the remaining capacity SOC or less. To extract. Then, the extracted section is set as a motor traveling section that travels by the power of the motors 12 and 14, and the other section that does not contribute to the added energy is set as an engine traveling section that travels by the power of the internal combustion engine 11, Go to the end.

As described above, according to the control device 10 of the hybrid vehicle 1 according to the present embodiment, the remaining capacity SOC of the battery 16 becomes zero when reaching the destination where the charging facility is installed, so that the internal combustion engine By controlling the operation of the engine 11 and the motors 12 and 14, fuel consumption in the internal combustion engine 11 can be reduced.
Moreover, at the destination, the battery 16 can be charged from a state where the remaining capacity SOC of the battery 16 is zero, the battery 16 can be extended in life, and the power of the motors 12 and 14 can be increased when the vehicle is restarted. By using it, the fuel consumption in the internal combustion engine 11 can be further reduced.
Further, when the destination is a work place when commuting or a home when returning home, there is a high possibility that a parking time longer than the charging time required for fully charging the battery 16 is secured. 16 full charge is easily possible.

  Further, even when it is not possible to travel all routes from the current position of the host vehicle to the destination with only the power of the motors 12 and 14, the power of the section where the fuel consumption is large is transmitted to the motors 12 and 14, respectively. Assuming that the power in the section where the operating efficiency of the internal combustion engine 11 is high is the internal combustion engine 11, the distribution of the operating sections of the motors 12, 14 and the internal combustion engine 11 on the path is set. Thereby, the energy efficiency as the whole vehicle at the time of route travel can be improved.

  In the above-described embodiment, the hybrid vehicle 1 includes the motors 12 and 14 in the front wheel drive system and the rear wheel drive system. However, the present invention is not limited to this, and the internal combustion engine 11 and the motor are used as a travel drive source. The various hybrid vehicles provided with these may be sufficient.

11 Internal combustion engine 12 Front motor (generator motor)
14 Rear motor (generator motor)
16 Battery (capacitor)
16a charger (plug-in means)
34 Map data storage (storage means)
38 Current position calculation unit (own vehicle position detection means)
39 Route calculation unit (destination setting means, route information acquisition means)
41 Remaining capacity detection unit (remaining capacity detection means)
42 Output calculation unit (power consumption calculation means, control means)

Claims (2)

A control apparatus for a hybrid vehicle, comprising: an internal combustion engine and a generator motor as power sources for the vehicle; a capacitor that transfers electrical energy to and from the generator motor; and a plug-in unit that charges the capacitor from a household outlet. ,
Own vehicle position detecting means for detecting the position of the own vehicle;
Destination setting means for setting a destination;
Storage means for storing map information having installation position information of a charging facility capable of charging the battery by the plug-in means;
Route information acquisition means for acquiring route information from the position of the host vehicle to the destination;
A remaining capacity detecting means for detecting a remaining capacity of the battery;
Based on the route information, power consumption calculation means for calculating power consumption when traveling from the position of the host vehicle to the destination by the power of the generator motor;
When the power consumption is larger than the remaining capacity and the charging facility is installed at the destination, the remaining capacity becomes zero when reaching the destination, A control apparatus for a hybrid vehicle, comprising: an engine and control means for controlling operation of the generator motor. The control means divides the route from the position of the host vehicle to the destination into a plurality of sections, calculates fuel consumption when the vehicle travels by the power of the internal combustion engine for each section, and calculates the fuel consumption The hybrid vehicle control device according to claim 1, wherein power in the section having a large amount is the generator motor.

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