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US 5,291,802 AGranted
Control system for engine and automatic transmission
AssigneeMazda Motor Corporation
InventorMinoru Kuriyama
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AssigneeMazda Motor Corporation
InventorMinoru Kuriyama
Estimating the term…
A control system for the engine and the automatic transmission of the automotive vehicle is arranged such that the torque of the engine is reduced by delaying the timing of ignition at the time of a shift of the automatic transmission with a multi-stage shift mechanism. The amount of the absorbed inertia at the time of the shift is computed as an amount corresponding to changes of the numbers of revolutions on the input side of the multi-stage shift mechanism prior to and subsequent to the shift thereof. The timing of ignition is so adapted as to be delayed in accordance with the amount of the resulting amount of the absorbed inertia. Preferably, the control amount for the torque to be reduced is computed in accordance with the torque of the engine at the time of the shift, and a control amount for the final torque to be reduced is given on the basis of the control amount for the torque to be reduced and the amount of the absorbed inertia, thereby delaying the timing of ignition in accordance with the control amount for the final torque to be reduced.
A control system for an engine and an automatic transmission for an automotive vehicle, having a torque adjusting means for adjusting torque of the engine and a control means for controlling said torque adjusting means so as to reduce the torque of the engine at the time of a shift of said automatic transmission with a multi-stage shift mechanism, wherein:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of…:…
Conjoint control of vehicle sub-units of different type or different function: including control of propulsion units
Including control of change-speed gearings: stepped gearings
Propelling the vehicle: propulsion control with control means using analogue circuits, relays or mechanical links
Term ended 8 Oct 2012 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to a control system for an engine and an automatic transmission for an automotive vehicle, so adapted as to reduce torque of the engine at the time of a shift of the automatic transmission.
2. Description of the Related Art
FIG. 1 is a block diagram showing an outline of the function of a control system according to an embodiment of the present invention.
FIG. 2 is a schematic representation showing an outline of the control system according to an embodiment of the present invention.
FIG. 3 is a flowchart showing a working example of the control system according to the present invention.
The present invention will be described more in detail with reference to the accompanying drawings.
As shown in FIG. 2, an body 1 of the engine is provided with a spark plug 2 for each cylinder. The spark plug 2 is connected to an ignition circuit 3 consisting of an ignition coil, a distributer or the like, and the ignition circuit 3 is so arranged as to be capable of changing the timing of ignition in response to a control signal. The ignition circuit 3 corresponds to the torque adjusting means a as shown in FIG. 1, and the torque of the engine can be adjusted by adjusting the timing of ignition.
The engine 1 is provided at its intake passage 4 with an air flowmeter 5 for detecting an amount of intake air to be inhaled into the engine 1 and a throttle valve 6 for adjusting the amount of the intake air in accordance with an operation by an accelerator. The throttle valve 6 is associated with a sensor 7 for sensing the angle of opening of the throttle valve and a sensor 8 for sensing the number of revolutions of the engine.