73results about How to "Fuel economy" patented technology

A calculation unit (3) determines whether or not an operation which worsens fuel economy has been performed, and if it is determined that an operation which worsens fuel economy has been performed, the calculation unit (3) respectively calculates the actual amount of consumed fuel and an amount of fuel that would have been consumed had the operation that worsens fuel economy not been performed. The calculation unit (3) then calculates an amount of fuel consumed in excess due to the operation which worsens fuel economy by subtracting the amount of fuel that would have been consumed had the operation that worsens fuel economy not been performed from the actual amount of consumed fuel. A display (4) displays the calculated excess fuel consumption amount.

A system according to this invention opposes creep in a hydraulic hybrid motor vehicle. An accumulator contains fluid at high pressure, and a reservoir contains fluid at lower pressure. An engine produces positive torque at the wheels during an engine idle condition, and a pump/motor, driveably connected to the wheels and the engine, has a variable volumetric displacement pumps fluid to the accumulator from the reservoir. A control system determines a magnitude of negative torque transmitted from the wheels to the pump/motor that would exceed the magnitude of positive torque, determines the volumetric displacement of the pump/motor corresponding to the magnitude of negative torque, changes the displacement of the pump/motor to the required displacement, and operates the pump/motor as a pump driven by negative torque from the wheels to pump fluid from the reservoir to the accumulator.

A heat exchanger integrated into the transmission oil pan transfers heat from post-catalyst exhaust gases to the transmission oil. Inlet and outlet ducts route exhaust gas between the heat exchanger and an exhaust pipe located downstream of the catalyst. The exhaust pipe accommodates a control valve that diverts exhaust gas flow to the heat exchanger during the warm-up phase, or to the tailpipe during steady state operation. A control function is provided to monitor transmission oil temperature and engine operating conditions and to control actuation of the valve. The main input parameter to the control function is the transmission oil temperature.

An upper limit value of an upward gradient of a road surface for starting neutral coasting is set to be larger than an upper limit of the upward gradient of the road surface for starting free-run coasting, so, when the upward gradient is relatively large and a coasting distance is short, the vehicle is caused to travel in the neutral coasting, and stop and restart of the engine are not carried out. Therefore, a decrease in drivability of the vehicle is suppressed. When the upward gradient is relatively small and the coasting distance is long, the vehicle is caused to travel in the free-run coasting, and supply of fuel to the engine is stopped, so fuel economy of the vehicle is obtained. Thus, it is possible to achieve both fuel economy and drivability of the vehicle during coasting on an upward gradient.

A low-octane fuel and a high-octane fuel stored in a low-octane fuel tank (5) and a high-octane fuel tank (7), both having known octane numbers, are injected from fuel injection valves (13a, 13b) into an intake port (12) at a mixing proportion that achieves a standard octane number set in accordance with the engine operation state. If knocking occurs during a predetermined steady engine operation state, the knocking is detected by a knock sensor (10b) and, corresponding to the knocking, the ignition timing is retarded from a basic ignition timing. A deviation in octane number is determined from the amount of ignition timing retardation with reference to a map, and is then corrected by the intake air pressure. On the basis of the corrected deviation in octane number, a deviation in the mixing proportion of the high-octane fuel is determined with reference to a map. The thus-determined deviation is added to a target mixing proportion computed corresponding to the standard octane number, thereby computing the present mixing proportion.

The invention provides a method for controlling the torsion of a stepless variable-speed moderate hybrid vehicle, which comprises the following steps that: an engine management system ECU calculates the torsion required by an integral vehicle according to the displacement amount of an accelerator pedal of a driver, after the torsion required by the integral vehicle is calculated, the engine management system ECU sends the torsion required by the integral vehicle to an integral vehicle controller HCU, and the integral vehicle controller HCU distributes motor torsion and engine torsion according to the condition of the current electric quantity of a battery and the running condition of an engine. Through the method, the dynamic property of the integral vehicle can be met, and the working condition of the engine is optimized by combining with the operating characteristic of CVT, so that the integral vehicle has economic consumption of fuel oil and less pollution emission, and achieves the effects of energy conservation and emission reduction.

Methods are provided for performing diagnostic routines in a hybrid vehicle. In one example approach, a method for operating a hybrid vehicle comprises inhibiting engine shutdown and enabling deceleration fuel shut off to perform a monitoring test while a vehicle speed is above a threshold speed.

The invention provides a drive control method of a hybrid power drive system. The drive system comprises an energy storage device, a first motor, a second motor, an engine, a clutch and a drive shaft, the engine is interconnected with the first motor in series; output shafts of the first motor and the second motor are connected to the clutch; the first motor and the second motor are electrically connected to the energy storage device; the drive shaft is connected to the output shaft of the second motor, wherein, the clutch is a tristate overrunning clutch. The method comprises the following steps: controlling the drive system to be in a pure electromotive operating condition, a serial connection operating condition, a series parallel connection operating condition or a parallel connection operating condition according to power demand of the drive system and an energy storage condition of the energy storage device, and controlling power outputs of the first motor, the second motor and the engine in the series parallel connection operating condition or the parallel connection operating condition. The drive control method helps effectively exert the efficiency of the hybrid power drive system and reduce pollutants discharge, which is good for environmental protection.

Methods and systems are provided for displaying a recommended engine fuel fill amount to an operator of a plug-in hybrid electric vehicle. In one example, the recommended engine fuel fill amount is determined based on an actual amount of fuel consumed over a particular duration and displayed to an operator of the vehicle with a low fuel warning.

A fuel gas has a gas including at least 40 weight % or more of 1-butene and propane, or at least 56 weight % or more of 1-butene and propylene. A combustion type power tool is driven by the fuel gas. A compressed gas container for a combustion type power tool has an inner side vessel filled with the fuel gas. When the fuel gas includes propane, 1-butene may be equal to or higher than 59 weight % and equal to or lower than 95 weight %. When the fuel gas includes propylene, the 1-butene may be equal to or higher than 70 weight % and equal to or lower than 96 weight %.