JP2716890B2 - Engine control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling two engines mounted on a vehicle.

[0002]

2. Description of the Related Art Conventionally, in order to increase the size of a vehicle such as a truck or a trailer, it is necessary to mount a high-output engine. In this case, there is a method of increasing the size of one engine to obtain a large engine output. General.

[0003] However, the above method has a problem that a huge engine must be newly manufactured which is completely different from a conventional engine, and a huge investment is required. In addition, when the size of the engine is increased, the inertia of the engine is increased, and a large amount of power is consumed to operate the engine itself.

In order to solve these problems, two first and second engines, which are conventionally mass-produced, are juxtaposed to a vehicle, and the crankshaft of the first engine is rotated so that a single large output is obtained. 2. Description of the Related Art A power unit for a motor vehicle connected to a crankshaft of a two-engine through a gear or a chain has been disclosed (JP-A-49-129005).

[0005]

[Problem to be Solved] However, in the above-mentioned device, a large-scale engine is not required to be newly manufactured, so that a large investment is not required. Because it rotates at speed, the fuel efficiency could not be improved much.

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine control device capable of obtaining an optimum engine output according to the running condition of a vehicle and improving fuel efficiency.

A configuration of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to an embodiment. The engine control device of the present invention includes a first engine 11 that supplies power to a transmission via a main clutch 13, a coupling clutch 14 and a gear 22, 1 connected to a crankshaft 11 a of the first engine 11.
Power was applied via 6, 21 and the coupling clutch 14 was disengaged
The second engine 12 that will be held in the idling state when
And first and second adjusting means 31 and 32 for adjusting the rotational speeds of the first and second engines 11 and 12, respectively, and a clutch actuator 24 for connecting and disconnecting the coupling clutch 14.
First and second accelerator sensors 41 and 42 for detecting adjustment amounts of the first and second adjusting means 31 and 32, respectively;
A clutch sensor 26 for detecting the engaged / disengaged state of the coupling clutch 14, and first and second rotation sensors 51, 52 for detecting the rotational speeds of the first and second engines 11, 12, respectively.
When a vehicle speed sensor 27 for detecting a vehicle speed, the sensors 4
1, 42 , 26 , 51 , 52 , 27 based on the respective detection outputs.
And a controller 28 for controlling the

[0008] It is determined that the connection clutch 14 is disconnected.
The first accelerator sensor 4 detects that the adjustment amount of the first adjustment means 31 is equal to or more than a predetermined value in a state where the
1 is detected, and when the vehicle speed sensor 27 detects a vehicle speed less than a predetermined value, the controller 28 and the second adjustment means 32
Ru increases the rotational speed of the second engine 12 by controlling the.
Further , the first and second rotation sensors 51 and 52 respectively indicate that the second engine 12 has become the same speed as the first engine 11.
When detected, the controller 28 operates the clutch actuator.
By controlling the motor 24, the coupling clutch 14 is engaged, and the power of both the first and second engines 11, 12 is supplied to the transmission. Also, the first accelerator sensor 41 and the vehicle speed sensor 27
Both of the adjustment amounts of the first adjusting means 31 are equal to or more than the predetermined value and
Except when a vehicle speed less than a predetermined value is detected, that is, at a low load
, The controller 28 is cut consolidated clutch 14, the second
While the engine 12 is kept idling, the first
The power of only the engine 11 is given to the transmission.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, two diesel engines, a first engine 11 and a second engine 12, are mounted on the vehicle. A main clutch 13 is connected to a rear end of the crankshaft 11a of the first engine 11, and a transmission (not shown) is connected to a rear end of the main clutch 13. Further, a first gear 21 is fixed to a crankshaft 11 a of the first engine 11. A connecting clutch 14 is connected to the rear end of the crankshaft 12 a of the second engine 12, and a second gear 22 that meshes with the first gear 21 via the idle gear 16 is connected to the rear end of the output shaft 14 a of the connecting clutch 14. It is fixed. In this example, the main clutch 13 is a dry single-plate clutch, and the connection clutch 14 is a wet multi-plate clutch. 1st engine 1
The first adjusting means 31 for adjusting the rotation speed of the first engine 31 includes a fuel injection pump 31a for injecting fuel into the first engine 11, a control lever 31b for adjusting the injection amount of the pump 31a, and a rotation of the lever 31b. It has an accelerator pedal 31c. The second adjusting means 32 for adjusting the rotation speed of the second engine 12 includes a fuel injection pump 32a for injecting fuel into the second engine 12, and a pump 32a
Control lever 32b for adjusting the injection amount of the fuel, and an accelerator actuator 32c for rotating the lever 32b
And Also, the shift fork 13a of the main clutch 13
Is connected to a clutch pedal 17 for connecting and disconnecting the clutch 13 via a booster 18, a pipe 19 and a master cylinder 23. A shift actuator 14b for connecting and disconnecting the clutch 14 is connected to a shift fork 14b of the connecting clutch 14. Is done.

First and second accelerator sensors 41, 42 for detecting the amount of movement of these levers 31b, 32b, ie, the accelerator opening of the first and second engines 11, 12, are mounted on the control levers 31b, 32b, respectively. A clutch sensor 26 for detecting the on / off state of the clutch 14 is attached to the shift fork 14b of the coupling clutch 14. First and second rotation sensors 51 and 52 for detecting the rotational speeds of the first and second engines 11 and 12 are attached to the crankshafts 11a and 12a, respectively. A vehicle speed sensor 27 for detecting a vehicle speed is attached.

A first accelerator sensor 41, a second accelerator sensor 42, a clutch sensor 26, a first rotation sensor 51,
Each detection output of the second rotation sensor 52 and the vehicle speed sensor 27 is connected to a control input of the controller 28, and a control output of the controller 28 is connected to the accelerator actuator 32c and the clutch actuator 24. The accelerator opening and the vehicle speed of the first engine 11 detected by the first accelerator sensor 41 and the vehicle speed sensor 27 are stored in the memory 28a of the controller 28, and further, the accelerator opening and the vehicle speed of the first engine 11 are used as a reference for comparison. And a region of the accelerator opening of the first engine 11 for applying the power of the second engine 12 to the crankshaft 11a of the first engine 11. In this example, when the accelerator opening of the first engine 11 is 0% when fully open and 100% when fully open, the second engine is opened when the accelerator opening of the first engine 11 becomes 75% or more. 12 engines powered by the first engine 1
One crankshaft 11a is provided (FIG. 2).

The operation of the engine control device thus configured will be described with reference to the flowcharts of FIGS. When a key switch (not shown) is turned on, the controller 28 operates the clutch actuator 24 in the direction of disengaging the connection clutch 14 based on the detection output of the clutch sensor 26, and thereafter, the first and second engines 11, 12
Is started. When accelerating the vehicle, the accelerator pedal 31c is depressed and the control lever 31b is moved to the first position.
The first engine 11 is moved in a direction to increase the accelerator opening of the engine 11, that is, to increase the rotation speed of the first engine 11. At this time, the first accelerator sensor 41 detects that the accelerator opening of the first engine 11 is, for example, 80%,
When the vehicle speed sensor 27 detects a low vehicle speed, the controller 28 compares these detected outputs with the map, and furthermore, the accelerator opening of the first engine 11 applies the power of the second engine 12 to the crankshaft 11a of the first engine 11. Compare if it is in the given area. Controller 28 is the first
When the accelerator opening of the engine 11 is 75% or more, the first
Since it is determined that the actual vehicle speed is lower than the vehicle speed on the map with respect to the accelerator opening of 80% of the engine 11, the accelerator actuator 32c is operated to control the control lever 32.
b is the direction in which the accelerator opening of the second engine 12 is increased, that is, the rotational speed of the second engine 12 is
Move in the same direction as 1. When the rotation speed of the second engine 12 becomes the same as that of the first engine 11, the controller 28 operates the clutch actuator 24 in the direction in which the connection clutch 14 is engaged based on the detection outputs of the first and second rotation sensors 51 and 52. . As a result, the power of the second engine 12 is transmitted to the crankshaft 11a of the first engine 11 via the gears 22, 16, 21 and the vehicle runs with the power of both the first and second engines 11, 12. , The vehicle is accelerated smoothly.

When the vehicle travels at a constant speed after reaching the desired speed, the accelerator pedal 31c is returned to set the accelerator opening of the first engine 11 to, for example, 40%.
The first accelerator sensor 41 detects that the accelerator opening of the first engine 11 is 40%, and the vehicle speed sensor 27
Detects a large vehicle speed, the controller 28 compares these detected outputs with the map. At this time, the controller 28 determines that the accelerator opening of the first engine 11 is less than 75% and that the actual vehicle speed is equal to or greater than the vehicle speed on the map for the accelerator opening 40% of the first engine 11, so that the clutch actuator 24 is operated in a direction to disengage the coupling clutch 14. When the clutch sensor 26 detects that the coupling clutch 14 has been disengaged, the controller 28 operates the control lever 32b in a direction to decrease the accelerator opening of the second engine 12, that is, the second engine 12
The rotation speed is moved in a direction to bring the motor into an idling state. As a result, the vehicle runs with only the power of the first engine 11 while the second engine 12 is kept in the idling state, so that fuel efficiency can be improved. in this way,
The vehicle is driven by the first and second engines 11 and 12 not only when accelerating the vehicle but also when climbing a hill or when loading a heavy object,
When the vehicle is running at a low load such as during steady running, the vehicle is driven only by the first engine 11 and an optimum engine output is obtained according to the running condition of the vehicle.

Although a diesel engine has been described in the embodiment, this is merely an example and a gasoline engine may be used. In the case of a gasoline engine, the first and second adjusting means are throttle valves for adjusting the amount of fuel supplied to each engine, and the first and second accelerator sensors are sensors for detecting the opening of the throttle valve. The numerical values given in the embodiments are merely examples, and the present invention is not limited to these values.

[0015]

As described above, according to the present invention, the core
Controller increases rotation speed of second engine at high load
When the speed becomes the same as that of the first engine,
And the transmission of both the first and second engines
And disengage the coupling clutch at low load,
With the first engine only
Since the second adjusting means and the clutch actuator are controlled so as to apply power to the transmission, an optimum engine output according to the driving situation can be obtained without lowering the power performance. Further, since a large amount of power is not consumed for operating an engine having a large inertia such as a vehicle equipped with one large engine, fuel efficiency of the engine can be improved. Further, since a conventional engine can be used without newly manufacturing a large engine, a large capital investment is not required.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control device of an engine according to an embodiment of the present invention.

FIG. 2 is a diagram showing a change in engine torque with respect to an accelerator opening.

FIG. 3 is a flowchart showing the first half operation of the device.

FIG. 4 is a flowchart showing the latter half operation of the device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 1st engine 11a Crankshaft of 1st engine 12 2nd engine 13 Main clutch 14 Connection clutch 16 Idle gear 21 1st gear 22 2nd gear 24 Clutch actuator 26 Clutch sensor 27 Vehicle speed sensor 28 Controller 31 First adjusting means 32 First 2 adjusting means 41 1st accelerator sensor 42 2nd accelerator sensor 51 1st rotation sensor 52 2nd rotation sensor

Claims (1)

(57) [Claims] A first engine (11) for supplying power to a transmission via a main clutch (13), and a coupling clutch (14) and a gear (22) are connected to a crankshaft (11a) of the first engine (11). the connecting powered via 16 and 21)
It is held idling when the clutch (14) disengages.
A second engine (12) Re that, the rotational speed and the first and second adjusting means for adjusting respectively (31, 32) of said first and second engines (11, 12), the coupling clutch (14) An intermittent clutch actuator (24), first and second accelerator sensors (41, 42) for detecting adjustment amounts of the first and second adjusting means (31, 32), respectively, and a coupling clutch (14). A clutch sensor (26) for detecting an on-off state; first and second rotation sensors (51, 52) for detecting rotation speeds of the first and second engines (11, 12); and a vehicle speed for detecting vehicle speed A second adjusting means (32) and a clutch actuator (24) based on the sensors (27) and the respective detection outputs of the sensors (41, 42, 26, 51, 52 , 27).
A control apparatus of an engine provided with the control to the controller (28) Toto, said clutch that said coupling clutch (14) has expired
In a state where the sensor (26) detects, the first adjusting means (31)
It is determined that the adjustment amount is equal to or greater than a predetermined value by the first accelerator
(41) and the vehicle speed sensor (27) is less than a predetermined value.
When the vehicle speed is detected, the controller (28)
Controlling the adjusting means (32) to control the rotational speed of the second engine (12);
And the second engine (12) is
The first and second rotations indicate that the speed is the same as that of the engine (11).
When the sensors (51, 52) respectively detect the control,
Roller (28) controls the clutch actuator (24).
The coupling clutch (14) is configured to be joined.
An engine control device characterized by the above-mentioned .