Method and arrangement for controlling the torque of an internal

Details Method and arrangement for controlling the torque of an internal Method and arrangement for controlling the torque of an internal

1997-01-13

1998-06-16

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02M 300

Patent

active

057655278

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

A method and an arrangement of this kind are disclosed in DE 34 39 927 C2 (U.S. Pat. No. 4,592,320). There, measures for compensating a rpm change when switching in a load are shown in the context of an idle air control. The load can, for example, be a climate control apparatus, a transmission, a blower, a clutch, et cetera. The measures comprise a precontrol of the idle air controller for which the air supply to the engine is increased when switching on the load independently of the controller. The increase factor of the air supply is then adapted on the basis of the controller output signal in the controlled state. In principle, the effect of the change of the air supply on the torque or on the rpm of the engine only occurs after a time delay. For this reason, the known method and known arrangement exhibit an unsatisfactory performance in some applications. In these applications, the load change leads to relatively large torque or rpm changes or rpm fluctuations as a consequence of the delayed torque change. This can affect the driving comfort and driving performance.


SUMMARY OF THE INVENTION

It is therefore an object of the invention to provide measures with the aid of which the torque change of the engine can be carried out without delay. The torque change is necessary because of the change in load.
The procedure according to the invention improves the driving comfort and the driving performance of an internal combustion engine when there is a change in engine load. The engine torque tracks without delay a torque change caused by the load change.
Special advantages result from the procedure of the invention when applied to an idle control. Load changes operate very greatly on the torque, which is to be outputted by the engine, in the idle operating state or in the operating state near idle. Accordingly, in this operating state, the procedure of the invention achieves a considerable improvement of the driving comfort as well as in the rapidity of the control.
It is especially advantageous that the torque reserve, which, according to the invention, is pregiven in each operating point of the engine, is the same in magnitude in the steady-state condition for each operating point so that the control reacts correspondingly fast to load changes in each operating point.


BRIEF DESCRIPTION OF THE DRAWING

The invention will be explained in greater detail with respect to the embodiments shown in the drawing. FIG. 1 shows an overview block circuit diagram of a control arrangement for the torque of an internal combustion engine; whereas, in FIGS. 2A-2D, the procedure of the invention is described with respect to time diagrams. FIG. 3 indicates the realization of the invention as a computer program in the context of a flowchart.


DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

In FIG. 1, a control apparatus 10 is shown which influences the air supply to the engine with an electrically actuable positioning element via an output line 12. The positioning element 14 is preferably a throttle flap. Furthermore, the control apparatus 10 includes at least an output line 16 to influence the ignition time point of the engine. Input lines 18 and 26 connect the control apparatus 10 to a measuring device 20 for detecting the rpm of the engine and a measuring device 28 to detect the engine load (air mass, air quantity, intake pipe pressure, combustion chamber pressure, quotient of one of these quantities and the engine rpm, et cetera).
In a preferred embodiment, the control apparatus 10 includes at least one microcomputer which holds essential subprograms and which are shown in the block circuit diagram of FIG. 1 with the view to the procedure of the invention. The input line 18 leads to two characteristic fields 22 and 24 and the input line 26 from a measuring device 28 leads to these two characteristic fields as a second input line. The measuring device 28 is provided for detecting engine load. The output line 30 of the characteristic field 22 leads to a first computation block 32 a

REFERENCES:
patent: 4582032 (1986-04-01), Hara et al.
patent: 4592320 (1986-06-01), Peter et al.
patent: 5163399 (1992-11-01), Bolander et al.
patent: 5253623 (1993-10-01), Melnyk et al.
patent: 5285649 (1994-02-01), Yamanaka et al.
patent: 5385029 (1995-01-01), Yamanaka et al.
patent: 5542389 (1996-08-01), Miyamoto et al.
patent: 5575255 (1996-11-01), Abe et al.

Affiliated with

Also associated with

Rating

Method and arrangement for controlling the torque of an internal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and arrangement for controlling the torque of an internal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and arrangement for controlling the torque of an internal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1715144