JP3355709B2 - Control device for turbocharger with rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a turbocharger with a rotating electric machine for improving the starting performance of a vehicle equipped with a turbocharger with a rotating electric machine.

[0002]

2. Description of the Related Art Turbochargers for pressurizing intake air by utilizing exhaust energy of an engine are widely used.
A rotating electric machine is mounted on a turbine shaft of the turbocharger, and is electrically driven or generated according to the operating state of the engine to increase the supercharging pressure or recover the power of exhaust energy.

[0003] By utilizing the electric drive of the turbocharger with a rotating electric machine, the intake air pressure raised by the electric driven rotating electric machine is supplied in accordance with a signal from the detection means for preparation for starting the vehicle to fly. A control device for a turbocharger for boosting up is disclosed in Japanese Patent Application Laid-Open No. 2-123242.

On the other hand, in order to easily start a large vehicle on a sloping road, the brake of a vehicle stopped on a sloping road by stepping on a foot brake is locked. The so-called HSA where the key is released
(Hill Start Aid) mechanism has been developed, and some vehicles are equipped with mass-produced HSA mechanisms.

[0005]

SUMMARY OF THE INVENTION In the turbocharger control device disclosed in the above-mentioned publication, when performing the flying boost-up control, the intention to start is predicted based on the engine speed and the state of the transmission. There is a case where the vehicle starts moving without increasing the supercharging pressure to the engine, and there is a problem that it becomes difficult to start the vehicle particularly when there is a large load.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the use of a rotating electric machine for increasing the engine torque by sufficiently increasing the boost at the time of starting by using the above-mentioned HSA mechanism together. It is an object of the present invention to provide a control device for a turbocharger.

[0007]

In order to solve the above-mentioned problems, according to the present invention, the supercharging pressure to the engine is increased by electric drive of a rotating electric machine mounted on a turbocharger to increase the torque when the vehicle starts. In a control device for a turbocharger with a rotating electric machine, a flow path valve provided between a master cylinder and a wheel cylinder of a brake mechanism of a vehicle and holding fluid pressure supplied to the wheel cylinder when a brake is actuated; Flow path control means for controlling to open the flow path valve when the supercharging pressure reaches a predetermined value.

[0008]

[Function] The brake is released when the supercharging pressure of the electrically driven rotating electric machine rises at the start of the vehicle equipped with the turbocharger with the rotating electric machine, so that the engine torque is increased even in a heavily loaded vehicle, and the vehicle starts strong. Is performed.

[0009]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a rotary electric machine equipped with a rotary electric machine according to the present invention.
FIG. 2 is a block diagram showing a configuration of an embodiment of a control device for a bogie.

Referring to FIG. 1, reference numeral 1 denotes an engine. A turbocharger 2 is connected to an exhaust pipe 11 and an intake pipe 12 of the engine.
Is driven to rotate, the compressor 23 attached to the turbine shaft 22 rotates, and the compressed air is supplied to the engine 1 as supercharged air from the intake pipe 12 by the pneumatic operation.

Reference numeral 3 denotes a rotating electric machine provided on the turbine shaft 22. The rotating electric machine performs an electric operation or a power generation operation in accordance with the operation state of the engine 1. Then, when the engine 1 needs to increase the torque, for example, when starting, when the electric power from the battery 4 is supplied via the power converter 41, the electric operation is performed,
By energizing the pneumatic operation of the compressor 23 to increase the supercharging pressure,
The air is supplied to the engine 1 to increase the output. When there is sufficient exhaust energy, the battery 4 is driven by the turbine torque to generate electric power, and the battery 4 is charged by the regenerated electric power.

The power converter 41 converts the DC power from the battery 4 into a high-voltage AC power and an inverter for converting the DC power from the battery 4 into an electric power or a power generating operation of the rotary electric machine 3. A rectifier and a regulator for converting to a direct current for battery charging are provided.

Reference numeral 5 denotes a controller, which is composed of a microcomputer and has a central controller for performing arithmetic processing, various memories for storing arithmetic processing procedures and control means, input / output ports, and the like. . The input ports include various types of signals from an engine rotation sensor 13, a boost pressure sensor 14, a vehicle speed sensor 51, a clutch sensor 52, a gear position sensor 53, an accelerator pedal depression sensor 54, a brake sensor 55, a selector position sensor 56, and the like. Signals are connected, and the controller 5 is configured to issue a predetermined control command to the power converter 41 or an HSA valve described later based on these signals.

In this embodiment, the HSA mechanism shown in the block diagram of FIG. 2 is mounted, and the return flow path from the wheel cylinder is closed by the HSA valve 6 between the master cylinder and the wheel cylinder. Even if the brake pedal is released, the vehicle is stopped, and the HSA valve 6 is opened if the supercharging pressure to the engine 1 is high when the accelerator pedal is depressed.

FIG. 3 is a processing flow chart showing an example of the operation of the embodiment constructed as described above. Next, the operation of the embodiment will be described with reference to FIG.

In step 1 of FIG. 3, it is checked whether or not the rotational speed N is less than 700 rpm based on the signal of the engine rotation sensor 13. If it is not less than 700 rpm, the process waits for time in step 2 and returns to the initial flow. In this case, in step 3, clutch disconnection is checked based on a signal from the clutch sensor 52.

In step 4, it is checked whether the gear position of the transmission is the first gear position based on the signal from the gear position sensor 53, and in step 5, whether the vehicle speed 以下 is 5 km or less based on the signal from the vehicle speed sensor 51. The process proceeds to step 2, but if the answer is yes, the process proceeds to step 6, where the counter value T is set, and the electric drive of the rotary electric machine 3 is started for flying boost (step 7).

In the next step 8, the depression of the accelerator pedal is checked by the signal of the accelerator depression sensor 54. When the depression is being performed, the boost pressure reaches a predetermined supercharging pressure in step 10 by the signal of the boost pressure sensor 14. Make sure that In the case of a predetermined supercharging pressure, the brake is released by the HSA mechanism, and a strong start is performed by the increasing supercharging pressure.

If the predetermined supercharging pressure has not been reached in step 10, time is waited until the pressure is increased, so that the supercharging pressure is sufficiently increased before starting. If the accelerator pedal is not depressed in step 8, the counter value T is set to T + 1 in step 13, and if the counter value T is equal to or larger than the predetermined value Ta in step 14, the flying boost is increased in step 15. The process is stopped, but if the value is equal to or less than the predetermined value Ta, the process proceeds to step 8 to perform the above-described flow.

Although the present invention has been described with reference to the above-described embodiments, various modifications are possible within the scope of the present invention, and these modifications are not excluded from the scope of the present invention.

[0021]

According to the present invention as in the above embodiment,
After confirming that the boost pressure to the engine has risen sufficiently when the vehicle starts, the HSA mechanism unlocks the brakes and starts the vehicle. The effect of being able to start strongly even in a large number of states is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a control device for a turbocharger with a rotating electric machine according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of an HSA mechanism according to the present embodiment.

FIG. 3 is a processing flowchart showing an example of the operation of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Turbocharger 3 ... Rotating electric machine 5 ... Controller 6 ... HSA valve

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁷ identification code FI F02D 23/00 F02D 23/00 P (58) Field surveyed (Int.Cl. ⁷ , DB name) B60K 41/20 B60K 41 / 00 301 B60T 7/12 F02B 37/10 F02D 23/00

Claims (1)

(57) [Claims] 1. A control device for a turbocharger with a rotating electric machine for increasing a supercharging pressure to an engine by electric drive of a rotating electric machine attached to the turbocharger to increase torque at the time of starting the vehicle, comprising: A flow path valve provided between the master cylinder and the wheel cylinder for holding the fluid pressure supplied to the wheel cylinder when the brake is actuated; and when the supercharging pressure reaches a predetermined value when the vehicle starts moving, the flow path valve And a flow path control means for controlling the opening of the turbocharger.