摘要:
Engine monitor/control microprocessor primarily effective to automatically adjust the engine power setting in a transmission power train in which the transmission drive reduction is variable in ratio, by step change or continuously so, such as for use in farm tractors. The microprocessor adjusts the position of the setting so that engine power set at all levels is produced at the right brake specific fuel consumption for substantially minimum pounds of fuel per horsepower hour, or within a band width thereof if not all that sensitive. Preferably, the microprocessor has a higher priority primary function of also automatically adjusting the transmission drive reduction ratio, for the same purpose but with high sensitivity.
摘要:
An automotive powertrain includes a basically conventional piston engine, a continuously variable ratio transmission, engine speed and power sensors and a feedback control system. The control system adjusts both the transmission ratio and the throttle valve in the engine carburetor or fuel metering system in response to the position of the accelerator pedal and in response to engine power output and crankshaft speed as measured by the engine sensors. The transmission provides extreme overdrive gear ratios which allow the engine to be operated at wide open throttle even during moderate cruising, and, in addition, the engine carburetor or fuel metering system is calibrated to deliver to the engine a stoichiometric air-fuel mixture which is combined, before combustion, with a special proportion of recirculated exhaust gas. As a result of the control system's implementing extensive wide open throttle engine operation with the above mentioned intake charge composition, many combustion variables are optimized to produce exceptional fuel economy.
摘要:
Aspects of the present invention relate to a method of using a transmission with multiple clutches in order to provide improved methods of traction control on a hill ascent. Embodiments provide for the use of power-shift, automatic or dual clutch gearboxes.
摘要:
According to one aspect of the present disclosure, a control system, apparatus, and method includes dynamic optimization of at least one of a vehicle reference speed and/or transmission gear state of a vehicle by determining current and future engine power requirements from the current and forward-looking route conditions to improve performance, drivability, and/or fuel economy of the vehicle over what is achievable through conventional gear state selection via static calibration tables and conventional shifting strategies. The selection of the vehicle reference speed and gear state can be performed independently of one another in one embodiment, and complementary of one another in another embodiment.
摘要:
A system and method of controlling the operation of a transmission using fuel consumption data. The system and method includes controlling the operation of a vehicle transmission which is operatively connected to an engine having operating characteristics and operatively connected to a transmission control module having access to a memory. Fuel consumption data for an engine is converted to engine efficiency loss data representative of the engine operating. A set of polynomials is determined to provide a pattern representative of the operating characteristics the engine. A transmission controller using the pattern determines a prospective operating condition of the transmission to provide fuel efficient operation of the engine.
摘要:
A control method is provided for a powertrain in a vehicle, the powertrain including an engine mechanically connected to a gearbox and an Electronic Control Unit (ECU), wherein the method includes allowing an extraordinary gear shift in spite of a first torque comparison indicating an expected engine output torque demand above a first general limit for allowed output torque associated with the extraordinary gear shift provided that: a second torque comparison indicates that the expected engine output torque demand after the extraordinary gear shift is within the limits of a second temporarily increased allowed engine output torque limit; and an extraordinary gear shift criteria is fulfilled indicating a gear shift is allowed the criteria being dependent on at least one parameter chosen among estimated fuel efficiency, engine efficiency, expected future torque demand, time of running the engine above the general engine torque limit and engine temperature.
摘要:
A method for setting a shift point for shifting a transmission for a powered vehicle between a first gear ratio and a second gear ratio. The method includes determining input power data points based on real-time input torque data. The input torque data includes a maximum input torque. The method also includes calculating a gear step value based on the first gear ratio and second gear ratio. The method further includes determining a first power value and computing a second power value based on the gear step value. The first power value and second power value are compared to one another and adjustments are incrementally made in the first power value speed until the difference between first and second power values meets a threshold. The shift point is therefore based on the result of comparing the first power value and the second power value and the corresponding speed associated with the first power value.
摘要:
A method for optimized launch of a vehicle is provided wherein a driveline of the vehicle at least includes an engine, an automatic transmission, a system for exhaust gas recirculation, which are controlled by a driveline management system, wherein the management system is able to determine the mass of the vehicle, and whereby a launching gear of the transmission is calculated dependent at least on the determined mass of the vehicle, whereby a launching gear is chosen dependent of the power loss caused by the EGR and wherein the power loss caused by the EGR is determined, the available power to launch the vehicle is determined, and the launching gear is recalculated dependent of the available power, and selecting said recalculated launching gear before launch of the vehicle, launch the vehicle with the recalculated launching gear.
摘要:
A method for obtaining fuel-loaded exhaust gases by late and/or delayed injection(s) of fuel into a Diesel engine combustion chamber of a motor vehicle including an automatic gearbox robotized or with constant torque variation. The laws defining the reduction ratio of the gearbox are modified to limit dilution of the fuel in the oil present in the combustion chamber.
摘要:
A method for obtaining fuel-loaded exhaust gases by late and/or delayed injection(s) of fuel into a Diesel engine combustion chamber of a motor vehicle including an automatic gearbox robotized or with constant torque variation. The laws defining the reduction ratio of the gearbox are modified to limit dilution of the fuel in the oil present in the combustion chamber.