JPH073184B2 - Automatic transmission control device for gas turbine vehicle - Google Patents

Description

The present invention relates to an automatic transmission control device for a gas turbine vehicle.

[Prior Art] A gas turbine engine includes a compressor and an output turbine, and a two-shaft gas turbine engine compressor and a compressor engine are connected by one compressor shaft, and the output turbine has another output. It is attached to the shaft. The gas generated by the combustion sequentially passes through the compressor turbine and the output turbine to drive the compressor and the output shaft, respectively. A variable vane nozzle is attached to the output turbine, and controlling the area of the variable vane nozzle enables efficient engine operation. A gas turbine engine having a variable inlet guide vane at the compressor inlet is also known (see SAE800190).

Generally, a reciprocating internal combustion engine is output controlled by the intake air amount according to the throttle valve opening and the fuel injection amount according to the adjusting lever opening, and the output torque is controlled by the intake air amount and the fuel injection. It corresponds to the quantity. Therefore, when the output torque is used for controlling other devices, that is, the automatic transmission, the throttle opening and the accelerator opening can be directly used as parameters representing the output torque of the engine. However, the output torque of the gas turbine engine cannot be said to correspond to or proportional to the accelerator opening, and there is a considerable difference between the accelerator opening and the actual engine output. This is because the operation of the gas turbine engine is performed in consideration of the surging region of the compressor and the like, and therefore, the fuel supply amount that seems to govern the engine output torque is not directly proportional to the accelerator opening. Further, in the two-shaft gas turbine engine, the variable vane nozzle is also throttled as the partial load is increased, and the output torque becomes higher as the rotational speed becomes lower. Therefore, if the accelerator opening is used to control the automatic transmission of a vehicle equipped with a two-shaft gas turbine engine, an appropriate shift point cannot be obtained. Therefore, in order to control the automatic transmission of the automobile equipped with the two-shaft gas turbine engine, it is necessary to obtain the output torque according to the operating state of the engine. Japanese Patent Application Sho 61-
No. 241491 discloses calculating a target position of a throttle lever from a signal indicating an engine operating state including an outlet pressure of a compressor of a gas turbine engine, a blade angle of a variable blade nozzle, and at least another correction detection signal. It is a disclosure.

[Problems to be solved by the invention]

As disclosed in the above-mentioned prior application, the output torque of the engine can be calculated from the outlet pressure of the compressor, the blade angle of the variable blade nozzle, etc., and the output torque obtained from this can be calculated from that obtained from the accelerator opening. Can be said to be accurate. However, in the gas turn engine having the variable inlet guide vanes, even if the engine torque is calculated using only the signal indicating the engine operating state, the operation of the automatic transmission is dissatisfied.
This is probably because the accurate torque cannot be calculated only by the signal indicating the engine operating state.

[Means for solving problems]

In order to solve the above-mentioned problems, an automatic transmission control device for a gas turbine vehicle according to the present invention is a gas turbine vehicle having a gas turbine engine having a vialable inlet guide vane and an automatic transmission. Output torque calculation means for calculating the engine output torque according to a signal representing the operating state and a signal representing the relationship between the variable inlet guide vanes, and an automatic transmission based on the output torque calculated by the output torque calculation means And a shift position control means for controlling the left position.

〔Example〕

FIG. 1 is a diagram showing a drive system of a gas turbine vehicle having a gas turbine engine 10 and an automatic transmission 12.

The two-shaft gas turbine engine 10 includes a compressor 14 and a compressor shaft.
A compressor turbine 18 connected to the compressor 14 at 16, an output turbine 20 and an output turbine shaft 22 attached to the output turbine 20.
And a combustor 26 and a heat exchanger 28. Combustor 26
Is supplied with fuel via a metering valve 30.
A variable inlet guide vane 100 is attached to the inlet of the compressor 14, and its blade angle can be controlled by the actuator 100. Further, a variable blade nozzle 32 is attached to the output turbine 20, and its blade angle can be controlled by an actuator 34.
These actuators 34, 101 and metering valves
30 is controlled by a first control unit (ECU1) 36. The detection signals of the accelerator pedal 38 and other detectors of the engine are input to the first control device 36.

As is known, the gas turbine engine 10 sends the air compressed by the compressor 14 through a heat exchanger 28 to a combustor 26, where the hot combustion gases produced therein drive the compressor turbine 18 and the output turbine 20. It is driven. The combustion gas passing through the power turbine 20 is exhausted through the heat exchanger 28. The metering valve 30 controls the amount of fuel. The variable blade nozzle 32 controls the blade angle of the output turbine 20.
By controlling the flow of the combustion gas consumed by, the operation area is shifted to the surge side by, for example, narrowing the opening area at the time of high load, maintaining a high operating temperature to obtain highly efficient operation. Also, the Bible Inlet Guide Vane
100 controls the air flow rate through the compressor 14 by controlling its blade angle.

The metering valve 30, the variable vane nozzle 32, and the variable inlet guide vane 100 are controlled respectively, and since they affect the engine output torque independently of each other, as described above, the generated engine The output torque cannot be evaluated simply by the depression amount of the accelerator pedal 38.

The output turbine shaft 22 is an automatic transmission via a reduction gear device 40.
The output shaft of the automatic transmission 12 is connected to twelve input shafts (not shown) and is transmitted to the wheels 44 via the operating gear device 42. The automatic transmission 12 has a torque converter 46, a lockup clutch 48, and a planetary gear device 50, and the shift position can be controlled by hydraulically controlling the lockup clutch 48 and the planetary gear device 50 as is known. It is possible. The hydraulic pressure for controlling the shift position is achieved by a plurality of solenoid valves 52, which are connected to a second control device (EC
It is controlled by U2) 54. The second control device 54 receives a signal indicating the operating state of the gas turbine engine 10 and a signal indicating the opening degree of the variable inlet guide vane 100, calculates the output torque accordingly, and outputs the output thus calculated. The shift position of the automatic transmission 12 is controlled based on the torque.

FIG. 3 shows a shift example of the automatic transmission 12 determined according to the vehicle speed and the output torque. The solid line shows the upshift and the chain line shows the downshift. Vehicle speed is automatic transmission 12
The output torque can be directly detected from the rotation speed of the output shaft, and the output torque is calculated by receiving the signal indicating the operating state of the gas turbine engine 10 and the signal indicating the opening degree of the variable inlet guide vane as described above. Is. In the case of the conventional reciprocating internal combustion engine, the output torque is represented by the throttle opening, and the throttle valve is divided between fully open and fully closed. Also in the present invention, the output torque can be accurately calculated between the maximum output torque and the minimum output torque with the same number of divisions as in the conventional case, as in the conventional case.

For this output torque calculation, as shown in FIG. 1, for example, the outlet pressure P ₃ of the compressor 14, the rotational speed N ₁ of the compressor 14, the rotational speed N ₃ of the power turbine 20, power turbine Sensors for detecting the outlet temperature T _{6 of} 20, the opening area A of the variable vane nozzle 32, the opening area B of the variable inlet guide vane 100, and the like are provided. These sensors are indicated in FIG. 2 by the reference numerals 56 to 66, respectively. In the present invention, by utilizing the fact that the opening area A of the variable blade nozzle 32 corresponds to the position X _VN of the hydraulic actuator 34 as shown in FIG. The position is detected by detecting X _VN . As a result, the opening area A of the variable vane nozzle 32 is
Can be easily and accurately known. Similarly, the opening area of the variable inlet guide vane 100 is detected by the position of the actuator 101.

The control unit 54 is configured as a microcomputer, and has a central processing unit (CPU) 56 having arithmetic and control functions, and a read only memory (ROM) 58 storing a program.
And a random access memory (RA
M) 60, which are connected to each other by a bus 62 and also to an input / output interface 64. The detection signal of the above-mentioned sensor is inputted through the input / output interface 64, and the control signal is sent from the input / output interface 64 to the solenoid valve 52 for controlling the shift position of the automatic transmission 12.

FIG. 5 shows a flow chart for controlling the automatic transmission 12, and in step 70, a signal representing the operating state of the gas turbine engine 10 detected by various sensors,
That is, the outlet pressure P _{3 of} the compressor 14, the rotational speed N ₁ of the compressor 14, the rotational speed N _{3 of} the output turbine 20, the output temperature of the output turbine 20.
Read T ₆ , the opening area A of the variable vane nozzle 32, and the opening area B of the variable inlet guide vane 100. Next, at step 71, the engine output torque TQ ₃ is calculated according to the detected signal. The engine output torque TQ ₃ is adapted to be calculated in the form of a function of the detection _{volume, f (P 3, N 1} , N 3, T 6, A, B). Next, in step 72, the vehicle speed V is read, and in step 73 it is determined whether or not a shift change condition is satisfied. The shift change conditions are stored as a two-dimensional map of the vehicle speed V and the engine output torque TQ ₃ as shown in FIG. If yes, go through step 74 to make a shift change, and if no, end the process as is.

In calculating the engine output torque TQ ₃ , in the embodiment, six detection signals, that is, the outlet pressure of the compressor 14 is used.
P ₃ , the speed N ₁ of the compressor 14, the speed N ₃ of the output turbine 20,
The outlet temperature T ₆ of the output turbine 20, the opening area A of the variable vane nozzle 32, and the opening area B of the variable inlet guide vane 100 are used. And the engine output torque TQ
₃ is a function of each detected amount, and is calculated in the form of f (P ₃ , N ₁ , N ₃ , T ₆ , A, B). That is, the relational expression of TQ ₃ = f (P ₃ , N ₁ , N ₃ , T ₆ , A, B) is prepared. Of these, the previous five signals represent the operating state of the engine resulting from combustion. Last signal B
Is a factor that controls such operating conditions, and is conventionally at least correlated to P ₃ and N ₁ , so if those values are used, the value of B should be used. It was thought that the engine output torque TQ ₃ could be calculated quite accurately without it. For this purpose, for _{example, TQ 3 = (aP 3 +} b) f (T 6, N 3) - relationship (cA + d) f (N 1) is used. This equation can also be expressed as:

_{TQ 3 = (aT 6 P 3} + bN 3) - (cN 1 A + d) This is a detection signal with respect to the opening area A, which is further added the outlet pressure P ₃ and the variable vane nozzle 32 of the compressor 14, i.e., Output turbine 20 outlet temperature T ₆ , output turbine 20 speed
N ₃ and the rotation speed N ₁ of the compressor 14 are used in the form of a correction coefficient as a variable.

However, variable inlet guide vanes 100
It was found that the above relationship alone is not sufficient during a transition such as a sudden opening and closing. Variable inlet guide vanes 100 control the overall power of compressor 14 and output turbine 20. Therefore, it has been found that it is preferable to calculate the output torque by a relational expression including the opening B of the variable inlet guide vane 100. Preferably, the engine output _{torque, TQ 3 = f (B)} * - is calculated by the equation of _{[(aP 3 + b) * f} (T6 1 N 3) (cA + d) * f (N 1) ]. Incidentally, a, b, c, d are constants.

〔The invention's effect〕

As described above, in the case of the gas turbine engine having the variable inlet guide valve, the engine output torque can be accurately calculated by using the signal indicating the opening degree and the engine operating state, and in this way. Since the shift position of the automatic transmission can be controlled by using the accurately calculated engine output torque, it is possible to maximize the power performance of the gas turbine vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a gas turbine vehicle according to the present invention, FIG. 2 is a detailed diagram of a control device of FIG. 1, and FIG. 3 is a diagram showing shift positions of an automatic transmission, FIG. 4 is a diagram showing the relationship between the opening area of the variable vane nozzle and the position of its actuator, and FIG. 5 is a control flowchart of the automatic transmission. 10 …… Engine, 12 …… Automatic transmission, 14 …… Compressor, 18
...... Compressor turbine, 20 …… power turbine, 26 …… combustor, 32 …… variable blade nozzle, 54 …… control unit, 100 …… variable inlet guide vane.

Claims (1)

[Claims] 1. A gas turbine vehicle having a gas turbine engine having a variable inlet guide vane and an automatic transmission, according to a signal indicating an operating state of the gas turbine engine and a signal indicating a relation between the variable inlet guide vanes. And a shift position control means for controlling the shift position of the automatic transmission on the basis of the output torque calculated by the output torque calculation means. Vehicle automatic transmission control device.