摘要:
A system and method using a vehicle drive shaft torque coupled to a driven wheel and a non-driven wheel speed for a vehicle throttle control system includes reading first and second torque values generated by the torque sensor. The method identifies when a sustained drop occurs between the first and second torque values. Another step determines if a change occurred between the first and second torque value readings in any of: a throttle position; a gear setting; and a brake pressure. A detected traction loss is signaled when the sustained drop occurred with no change between the first and second torque value readings in the throttle position, gear setting, and brake pressure. A desired throttle value is calculated using an engine torque and a target engine speed to prevent driven wheel slip. A throttle command signal changes an existing throttle value to the desired throttle value.
摘要:
The invention concerns a device for uphill start-up assistance for a motor vehicle. The invention is characterised in that the assistance device (15) comprises means (9) for controlling the release of the vehicle mechanical brakes (5) which act on the vehicle wheels (4), so that the vehicle is maintained in the slope when manoeuvring uphill without any intervention from the driver on this maintaining condition. The means (9) uses mainly the state of the slope indicated by a means (7), the interpretation and anticipation of the commands of driver and/or of a central driving member (14) by a means (7) and the instantaneous clutching characteristics (2) determined by a means (8). In a preferred embodiment, the assistance device co-operates with an electrical device of the parking brake.
摘要:
An engine start control system for starting the engine (2) of a hybrid vehicle operated in an EV drive mode. The system responds quickly to an acceleration request while limiting unpleasant deceleration sensations. The hybrid vehicle has a first clutch (3) disposed between the engine (2) and motor/generator (1). An electric drive mode exists in which the first clutch (3) is disengaged and the driving torque is provided only by the motor/generator (1), and a hybrid drive mode exists in which the first clutch (3) is engaged and the driving torque is provided by both the engine (2) and motor/generator (1). The system uses an engine start shift pattern that is high-geared as compared with a normal shift pattern. Shift control of the transmission (5) is performed using the engine start shift pattern when an engine start request arises. The engine (2) is started by controlling the engagement of the first clutch (3) after performing the shift control.
摘要:
A clutch control method, which, by means of an electronic control unit, disconnects a clutch in sync with the start of a transmission gear shift, and connects the clutch in sync with completion of the transmission gear shift, wherein, with regard to clutch connection control, a plurality of clutch connection modes are preset, and said clutch connection modes are selected in accordance with the size of a clutch input-side revolution number and output-side revolution number upon completion of a gear shift.
摘要:
A system is provided, which controls a starting and the subsequent vehicle acceleration procedure of a motor vehicle. The system compares a predetermined variable that grows continuously during the starting procedure to a threshold value. It determines a first desired value of torque in response to operator demand, and a second desired value torque in response to acceleration slip. The system performs a feed-forward 4WD control in response to the first desired value of torque when the predetermined variable is lower than or equal to the threshold value. The system determines whether or not driving situation justifies a change from performing the feed-forward 4WD control to performing a feed-back 2/4WD control in response to the second desired value of torque.
摘要:
Eine Bei einer Fahrgeschwindigkeitsregelung eines Kraftfahrzeuges wird eine Wunschbeschleunigung aus den Daten eines Fahrpedals (7) und eines Bedienelementes (9) zur Auswahl eines Wunschbeschleunigungs-Modus ausgewählt. Über das Bedienelement (9) wählt der Fahrer aus, in welchem Modus, beispielsweise sportlich oder komfortabel, eine Geschwindigkeitsdifferenz zwischen einer Istgeschwindigkeit und einer Sollgeschwindigkeit grundsätzlich ausgeglichen werden soll. Der Ausgleich der Geschwindigkeitsdifferenz erfolgt zudem über die Fahrpedalstellung.
摘要:
A drive system for an automotive vehicle of the front-and-rear wheel drive type, comprising a primary drive mechanism (10a) for drive of a set of front road wheels (13e) and an ancillary drive mechanism (10b) for drive of a set of rear road wheels (19d), wherein the front road wheels are driven by operation of the primary drive mechanism at a two-wheel drive mode and wherein the front and rear road wheels are driven by operation of both the primary and ancillary drive mechanisms at a four-wheel drive mode. In the drive system, a drive power applied to the primary road wheels is restricted to a predetermined value when the vehicle is driven by the primary and ancillary drive mechanisms at the front-and-rear wheel drive mode.
摘要:
An engine control system 10 is operable to provide an engine fueling rate equal to the larger of a first engine fueling rate at which the resulting engine torque is limited by a maximum input torque capacity of a presently engaged gear ratio of the transmission 16 and a second engine fueling rate at which the resulting engine torque is limited by a nominal input torque capacity of the transmission 16. The foregoing technique can be enabled at all times, or alternatively only after determination that the vehicle is experiencing deceleration under heavy engine load conditions. The engine control system 10 may be further operable to determine a third engine fueling rate at which the resulting engine output torque is limited by a maximum operating torque capacity of the transmission propeller shaft 18, as well as a fourth engine fueling rate at which the resulting engine output torque is limited by a maximum operating torque capacity of the drive axle 20 connected thereto. The actual engine fueling rate is then chosen to be the minimum of the larger of the first and second engine fueling rates, the third engine fueling rate, and the fourth engine fueling rate. This technique can be enabled either at all times, or alternatively only when the presently engaged gear ratio is one of a set of lower gear ratios of the transmission 16.
摘要:
Eine Bei einer Fahrgeschwindigkeitsregelung eines Kraftfahrzeuges wird eine Wunschbeschleunigung aus den Daten eines Fahrpedals (7) und eines Bedienelementes (9) zur Auswahl eines Wunschbeschleunigungs-Modus ausgewählt. Über das Bedienelement (9) wählt der Fahrer aus, in welchem Modus, beispielsweise sportlich oder komfortabel, eine Geschwindigkeitsdifferenz zwischen einer Istgeschwindigkeit und einer Sollgeschwindigkeit grundsätzlich ausgeglichen werden soll. Der Ausgleich der Geschwindigkeitsdifferenz erfolgt zudem über die Fahrpedalstellung.