Method and system for controlling start-up of a motor vehicle by dialogue of the engine controlling computer with the piloted mechanical gearbox, during restart of the vehicle in stop and start mode
First Claim
1. Start-off control method for a motor vehicle using dialogue between an engine control computer and an electronically controlled mechanical gearbox when restarting the vehicle in stop-and-start mode, wherein said method comprises the following steps:
- verifying that a first condition is fulfilled, wherein said first condition is fulfilled when a position of an accelerator pedal is higher than a predetermined threshold position of the accelerator pedal;
verifying that a second condition is fulfilled, wherein said second condition is fulfilled when the engine is in sequential injection mode;
verifying that a third condition is fulfilled, wherein said third condition is fulfilled when an engine speed gradient with respect to time at instant t is higher than a predetermined threshold value based on engine speed, this third condition being called the autonomous condition;
and when the first, second and third conditions are fulfilled, transmitting a start-off authorization to the gearbox.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns a method and a system for controlling start-up of a motor vehicle by dialogue of the engine controlling computer with the piloted mechanical gearbox, during a restart of the vehicle in stop and start mode. A “start-up authorization” is transmitted to the gearbox at a time t when the following three conditions are fulfilled: a) verifying the position of the accelerator pedal relative to a predetermined “threshold” position; b) the engine is in sequential injection phase; c) verifying a so-called “autonomous condition”, calculated on the basis of the engine speed and of an engine speed gradient compared to a predetermined threshold value. The invention is applicable to motor vehicles.
6 Citations
18 Claims
-
1. Start-off control method for a motor vehicle using dialogue between an engine control computer and an electronically controlled mechanical gearbox when restarting the vehicle in stop-and-start mode, wherein said method comprises the following steps:
-
verifying that a first condition is fulfilled, wherein said first condition is fulfilled when a position of an accelerator pedal is higher than a predetermined threshold position of the accelerator pedal; verifying that a second condition is fulfilled, wherein said second condition is fulfilled when the engine is in sequential injection mode; verifying that a third condition is fulfilled, wherein said third condition is fulfilled when an engine speed gradient with respect to time at instant t is higher than a predetermined threshold value based on engine speed, this third condition being called the autonomous condition; and when the first, second and third conditions are fulfilled, transmitting a start-off authorization to the gearbox. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification