Automatic transmission system
AssigneeDiesel Kiki Co., Ltd.
InventorsKazumasa Kurihara, Kenji Arai
Life of this patent
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Abstract
In an automatic transmission system for a vehicle having a gear-type transmission, a clutch connected to the gear-type transmission and an actuator for operating the gear-type transmission and the clutch, the system has a controller for controlling the operation of the actuator in accordance with the magnitude of load of the vehicle at each instant so as to shift the gear-type transmission into the target gear position. Thus, good fuel economy can be realized together with smooth driving performance even when the vehicle load is changed.
Claims7
An automatic transmission system for a vehicle having a gear-type transmission, a clutch connected to the gear-type transmission and an actuating means responsive to an electric signal for operating the gear-type transmission and the clutch so as to shift the gear-type transmission into a target gear position, said system comprising;
- means for producing a first signal relating to the vehicle speed;
- means for producing a second signal relating to the amount of operation of an accelerator pedal;
- a first means responsive to said second signal for producing a rate signal indicating the rate of the operation of the accelerator pedal per unit time for each depression of the accelerator pedal;
- a second means responsive to said first signal for producing a maximum acceleration signal indicating the maximum acceleration of the vehicle due to the depression of the accelerator pedal;
- a third means responsive to the signals from said first and second means for calculating the vehicle load and producing a third signal indicating the calculating vehicle load;
- and
- a control means responsive to said first through third signals for producing a control signal for operating said actuating means so as to shift the gear-type transmission into the target gear position determined for the operating condition of the vehicle at that time.
Dependencies are inferred from the claim text.