JPS61155013A - Vehicle mounted with subengine - Google Patents

Abstract

PURPOSE:To make it possible to install a subengine for air-conditioning and power generation on a small-size vehicle, by commonly using a radiator for the main engine and the subengine, and by controlling the air-conditioning and the power generation with the use of a control device. CONSTITUTION:There are provided a main engine 1 for running a vehicle body, and a subengine 2 for driving a compressor in a cooling device and a generator, and cooling water for both engines 1, 2 is circulated from water pumps 4, 5 and is cooled through a radiator 3. Further, hot air may be obtained from this cooling water through a heat-exchanger 6 in a heating device. Further, water valves 7, 8 are disposed in a branch passage through which cooling water for the subengine 2 is led to the heat-exchanger 6 or a passage (b) and in a passage through which cooling water for the man engine 1 is led to the heat- exchanger 6, respectively. Further, thermostat valves 10, 11 are diposed in bypass passages (c, d) and are controlled together with a compressor by a control device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle equipped with a sub-engine, which is equipped with a sub-engine for air-conditioning the vehicle, generating electricity, etc. in addition to a main engine for driving the vehicle.

(2) An example of a vehicle air conditioner that is equipped with a sub-engine in addition to the main engine for running a seated and strained vehicle is disclosed in Japanese Patent Application Laid-Open No. 58-22713. This vehicle air conditioner is equipped with a sub-engine consisting of a diesel engine in addition to the main engine, and with this sub-engine,
It drives the compressor, blower, etc. of the air conditioner that cools and heats the vehicle.

(The sub-engine used in the above-mentioned vehicle air conditioner is
Since a cooling system such as a radiator is also used separately from the main engine, the sub-engine as a whole becomes relatively large. For this reason, the above-described vehicle air conditioner can be applied to large vehicles such as buses, but there is a problem in that it cannot be applied to small vehicles such as passenger cars. There was also the problem that installing a sub-engine that was completely independent of the main engine would significantly increase costs.

A vehicle equipped with a sub-engine is equipped with a main engine for driving the vehicle, a generator for charging the battery, a sub-engine for driving the compressor of the cooling system, and a cooling water for the main engine and sub-engine. a radiator for dissipating heat, a main water valve for switching the flow path of cooling water discharged from the main engine to the radiator side or the heat exchanger side of the heating system, and a flow path of cooling water discharged from the sub-engine. a sub-water valve for switching the passage to the radiator side or the heat exchanger side of the heating device, and driving the generator and cooling device by the sub-engine;
It is configured by a control device for controlling the driving of each of the valves and the operation of the heating device.

1. The main engine and the sub-engine share a radiator, and the control device controls the drive of the generator and cooling system by the sub-engine and the supply of hot water to the heating system, so that the main engine can be turned on and off. It charges the battery regardless of the situation, and at the same time maintains the interior of the vehicle at a predetermined temperature.

FIG. 1 is a block diagram showing the waterway system of a vehicle equipped with a sub-engine according to the present invention, and (1) in the figure shows the main engine,
(2) is the sub engine, (3) is the main engine (1)
and radiator 1 for cooling water heat radiation of sub-engine (2)
．． c4) is the main water pump for circulating cooling water between the main engine (1) and radiator (3), and (5) is for circulating cooling water between the sub-engine (2) and radiator (3). Subwater pump for (
6) is a heat exchanger of a heating system that heats the interior of the vehicle using cooling water discharged from the main engine (1) and sub-engine (2). (A) is a first flow path connecting the radiator (3) and the main engine (1), (B) is a second flow path connecting the main engine (1) and the radiator (3),
(c) is the third flow path that connects the radiator (3) and the sub-engine (2), and (d) is the third flow path that connects the sub-engine (2) and the heat exchanger (6) via the sub-water valve (7). 4th tie
This is the flow path. (E) shows the heat exchanger (6) and the third flow path (
c), a sixth flow path connecting the second flow path (b) and the fourth flow path (d) via the main water valve (8); ) is the subwater valve (7)
This is a seventh flow path that connects the sub-engine (2) and the second flow path (b) via the sub-engine (2). (H) is the first flow path (A) and the second flow path (A).
The first bypass flow path is directly connected to the flow path (B) and circulates cooling water only within the main engine (1), and (S) is the third flow path (C) and the fourth flow path. Directly connect with road (d),
This is a second bypass passage for circulating cooling water only within the sub-engine (2). (10) is a first thermostat that controls opening and closing of the first bypass flow path (H);
11) is a second thermostat that controls the opening/closing of the second bypass flow path, and the first and second thermostats (10) and (11) operate when the temperature of the cooling water reaches a predetermined temperature or higher. , first and second bypass channels (H)
The (su) should be closed.

As shown in Figure 2, the sub-engine (2) having the waterway system is equipped with a generator (12) for charging the battery.
) and the compressor (13) of the cooling system are connected.

In the above configuration, a sub-engine (2), a heat exchanger (6
), a cooling system having a compressor (13), a main water valve (8), a subwater valve (7), and a generator (12) are mounted on the vehicle,
Further, an example of control when controlled by a control device connected to a timer will be explained. Note that this control requires the third
As shown in the figure, regardless of whether the main engine (1) is ON or OFF, when the battery voltage Va becomes lower than the charging start voltage VBL, the sub engine (2) operates the generator (12), and the battery voltage V, 3 is the charging stop voltage VB
A manual mode that stops the generator (12) when the temperature exceeds H, and a manual mode that controls the above battery voltage regardless of whether the main engine (1) is turned off or not, and the room temperature RT in the passenger compartment.
Using an auto mode that automatically controls the room temperature and a timer connected to the control device, regardless of whether the main engine is ON or OFF, the current timer is automatically set to the timer as shown in Figure 4. There is a timer mode in which the vehicle interior is maintained at a predetermined temperature by the auto mode when the time is between the control start time TMS and the control end time THE. The above room temperature control is as shown in Figure 5.
When the room temperature RT becomes lower than the heating start temperature THON, the sub-engine (2) supplies hot water to the heat exchanger (6) to operate the heating system, and the room temperature RT becomes the heating stop temperature THOFF.
When the room temperature RT exceeds the cooling start temperature TCON, the heating system is stopped, and when the room temperature RT becomes the cooling start temperature TCON, the cooling system is activated by the sub-engine (2), and when the room temperature RT becomes the cooling stop temperature TCON.
When the temperature drops below COFF, the cooling device is stopped.

Next, examples of control in the manual mode, auto mode, and timer mode will be explained according to the flowcharts shown in FIGS. 6 to 8. When control by the control device starts, as shown in the flowchart of FIG. 6, the control device first reads the mode in step (20) and then detects whether the mode is auto mode in step (21). and when in auto mode, shifts to auto mode. Also, if it is not in auto mode, step (22)
Detects whether or not it is in timer mode, and if it is in timer mode, it shifts to timer mode. If it is not the timer mode, it is detected in step (23) whether or not it is the manual mode, and if it is not the manual mode, the process returns to step (20) and the mode is read.

In the case of manual mode, in step (24), it is detected whether the sub-engine 0N10FF switch which manually turns the sub-engine (2) 0NS OFF is ON or OFF, and when the sub-engine 0IJ10FF switch is ON, step (25) is performed. It detects whether the key that starts the main engine (1) is turned on or off, and when the key is turned on, it shifts to auto mode. Fg, when the main engine (1) is started with the sub engine 0N10FF switch in the ON state, it shifts to auto mode. Also, sub engine 0N10FF switch or KE
When Y is OFF, it is detected in step (26) whether or not the sub-engine (2) is being driven, and if the sub-engine (2) is being driven, the battery voltage is detected in step (27). Take measurements. and battery voltage v
When B is higher than the charging stop voltage VBH and there is no need for charging, the sub-engine (2) is stopped in step (28), and then the process moves to step (29). Also, when the battery voltage VB has not reached the charging stop voltage VBH,
Step (29) with the sub engine (2) running
Move to. Also, in step (26), the sub engine (2
) has stopped, the battery voltage Va is measured in step (3o), and the voltage Va is the charging start voltage V.
At, or less, and when charging is required, the sub-engine (2) is started in step (31) to start charging the battery, and then the process moves to step (29). Also, when the battery voltage Va exceeds the charging start voltage VBL, the sub-engine (2) is stopped and the transition is made to the next step (29).
) detects whether the heating device is turned on or off.
When N, the main water valve (8) is switched to the O (Open) side and the sub water valve (7) is switched to the H (Hot) side in step (32), and the main engine (
After the cooling water discharged from 1) and the sub-engine (2) flows into the heat exchanger (6) of the heating device, the process returns to step (20). Also, when the heating system is OFF, the main water valve (8) is set to S in step (33).
(Shat) side, and subwater valve (7) to C(
CO (switched to the H side, the cooling water discharged from the main engine (1) and sub engine (2) is transferred to the heat exchanger (6)
After returning directly to the radiator (3) without passing through the
Return to step (20).

Next, an example of control in the auto mode will be explained according to the flowchart shown in FIG. In the auto mode, first, in step (40), the room temperature RT in the vehicle interior is read. Next, in step (41), it is detected whether or not the sub-engine (2) is running, and when the sub-engine (2) is stopped, in step (42), the room temperature RT is set to the heating start temperature THON. Detects whether or not the following is true. and room temperature R
When T is below the heating start temperature THON, step (4)
In step 3), switch the main water valve (8) to the 0 side and the sub water valve (7) to the H side, then step (
After starting the sub-engine (2) at step 49), the process returns to 5TART in the flowchart shown in FIG. When the room temperature RT is higher than the heating start temperature THON, it is detected in step (44) whether the room temperature RT is higher than the cooling start temperature TCON. And the room temperature RT is the cooling start temperature TCO
If it is above N, switch the main water valve (8) to the S side and the sub water valve (7) to the C side in step (45), then start the sub engine (2) in step (49). After that, return to 5TART. When the room temperature RT has not reached the cooling start temperature TCON, it is detected in step (46) whether the battery voltage VB is equal to or lower than the charging start voltage Vat. When the voltage vB is lower than the charging start voltage VBL, the main water valve (8) is switched to the S side in step (47), and the sub water valve (7) is switched to the C side, and then in step (49) After starting the sub-engine (2), 5TART
Return to When the battery voltage vB exceeds the charging start voltage vBL, the main water valve (8) is moved to the S side in step (48), and the sub water valve (7) is moved to the S side.
After switching to the C side, return to 5TART. Furthermore, when the sub-engine (2) is being driven in step (41), the room temperature RT is set to the heating start temperature TH in step (50).
At the same time as detecting whether the temperature is lower than ON or not, the heating device is turned OFF.
Detect whether F or not. Then, when the room temperature RT is lower than the heating start temperature THON and the heating device is OFF, the heating device is turned on in step (51), and then the 5TART
Return to Also, if the above conditions are not met, step (
52), it is detected whether the room temperature RT is equal to or higher than the cooling start temperature TCON, and at the same time, it is detected whether the air conditioner is OFF. When OFF, step (53)
After turning on the air conditioner at , return to 5TART. If the above conditions are not met, in step (54) it is detected whether the room temperature RT is equal to or higher than the heating stop temperature THOFF, and at the same time it is detected whether the heating device is turned on. When the room temperature RT is higher than the heating stop temperature THOFF and the heating device is ON, the heating device is turned OFF and the sub-engine (2) is stopped at the same time in step (55), and then the process returns to 5TART. If the above conditions are not met, in step (56) it is detected whether the room temperature RT is below the cooling stop temperature TCOFF, and at the same time it is detected whether the cooling device is ON or not. When the stop temperature is below TCOFF and the air conditioner is on, the air conditioner is turned off in step (57) and at the same time the sub engine (2) is stopped, and then 5TART is started.
Return to Also, if the above conditions are not met, step (
At step 58), it is detected whether the battery voltage Va is equal to or higher than the charging stop voltage 781, and at the same time, it is detected whether the heating device and the cooling device are OFF. Then, when the battery voltage V is equal to or higher than the charge stop voltage 781 and the heating device and the cooling device are OFF, the sub-engine (2) is stopped in step (59), and then the process returns to 5TART. If the above conditions are not met, the process returns to 5TART.

Next, an example of control in the timer mode will be explained according to the flowchart shown in FIG. In the timer mode, the current time line is first read in step (70). Next, in step (71), it is detected whether the time TM is between the control start time TMS and the control end time TMB. When time TM is within the control time, the vehicle interior is maintained at a predetermined temperature by the auto mode described above.

Also, when the time city is outside the control time, step (
72) Step C detects whether or not the sub-engine (2) is running. If the sub-engine (2) is running, step (73) measures the battery voltage. When vB is equal to or higher than the charging stop voltage VBFI and charging is not necessary, the sub-engine (2) is stopped in step (74), and then the sub-engine (2) is stopped in step (75).
). Also, the battery voltage Va is the charging stop voltage V
When the BH has not been reached, the process moves to step (75) with the sub-engine (2) being driven. Also step (
When the sub-engine (2) is stopped at step (72), the battery voltage VB is measured at step (76), and when the voltage Va is less than the charging start voltage Vat and charging is necessary, step (76) is performed. At step 77), the sub-engine (2) is started to start charging the battery, and then the process moves to step (75). Also, battery voltage Va
exceeds the charging start voltage Vat, the process moves to step (75) with the sub-engine (2) stopped. Next, in step (75), after switching the main water valve (8) to the S side and the sub water valve (7) to the C side, the 5TART of the flowchart shown in FIG.
Return to

FIG. 9 is a block diagram showing a specific circuit configuration when the above-mentioned control is performed by the control device mounted on the vehicle, in which (80) is the control device, and (81) is the control device (80). The input system that sends the necessary data, (82) is the control device (
This input system (81) shows the output system whose movement is controlled by the sub-engine (2).
N.

A sub-engine 0N10FF switch (83) for turning off the engine, a mode selection switch (83) for selecting the above-mentioned manual mode, auto mode and timer mode.
4) Temperature sensor (85) that detects the room temperature inside the vehicle
, KEY for starting the main engine (1)
(86), battery mounted on a vehicle (87)
and a timer (88) for setting the control time in timer mode. In addition, the output system (82) includes a main water valve (8) for switching the cooling water channel, a subwater valve (7), a compressor (13) for the cooling system, and a subengine for starting the subengine (2). Starter (89) and blower (
90). Furthermore, this blower (90
) is used in conjunction with the heating device and the cooling device to supply warm or cold air into the vehicle interior.

In the above configuration, the control word Z (80) is the input system (81
) The above-mentioned signal processing is performed based on the data input from the output system (82) to control the output system (82).

As mentioned above, in the present invention, since one radiator is shared by the main engine and the sub-engine, the entire sub-engine can be made compact, and the sub-engine can be installed in small heavy vehicles such as passenger cars. At the same time, the cost of the sub-engine can be reduced. In addition, if the sub-engine charges the battery and at the same time drives the cooling and heating systems, the battery can be charged even when the main engine is stopped, and at the same time the desired temperature can be maintained in the passenger compartment. It can be adjusted to Furthermore, if the drive of the cooling device and heating device by the sub-engine is controlled using a timer, it becomes possible to operate the cooling device or the heating device before the occupant gets into the vehicle, and to maintain the inside of the vehicle at an appropriate temperature. Furthermore, if the sub-engine charges the battery, drives the cooling device, and supplies hot water to the heating device, the load on the main engine is reduced, so the power performance of the vehicle can be improved.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the waterway system of the main engine and sub-engine, Figure 2 is a block diagram showing the connection state of the sub-engine, generator and compressor, and Figures 3 to 5 are the driving conditions of the sub-engine. 6 to 8 are flowcharts showing control examples when the sub-engine is controlled by the control device, and FIG. 9 is a block diagram showing a specific circuit configuration when the sub-engine is controlled by the control device. It is. (1) - Main engine, (2) Sub engine, (3) Radiator, (6) Heat exchanger for heating system, (7) Sub water valve, (8) -
Main water valve, (13) - compressor of the cooling system, (80) - control device. Patent applicant: Daihatsu Motor Co., Ltd.
Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 8, Figure 9.

Claims (1)

[Claims] (1) A main engine for driving the vehicle, a generator for charging the battery, a sub-engine for driving the compressor of the cooling system, and a radiator for dissipating heat from the cooling water of the main engine and sub-engine; A main water valve for switching the flow path of cooling water discharged from the main engine to the radiator side or the heat exchanger side of the heating device, and a main water valve for switching the flow path of the cooling water discharged from the sub-engine to the radiator side or the heating device side. a sub-water valve for switching to the heat exchanger side; and a control device for controlling the drive of the generator and the cooling device by the sub-engine, the opening and closing of the respective valves, and the operation of the heating device. A car equipped with a sub-engine.