초록 ▼

A fuel management control method for a hybrid electric vehicle drive having an internal combustion engine and an electric motor arranged in parallel such that both can propel the vehicle; the system including an electric motor driven fuel pump and a programmable microprocessor; and wherein the metho

A fuel management control method for a hybrid electric vehicle drive having an internal combustion engine and an electric motor arranged in parallel such that both can propel the vehicle; the system including an electric motor driven fuel pump and a programmable microprocessor; and wherein the method further includes monitoring vehicle speed and sensing braking pressure and directing signals of both vehicle speed and braking to the microprocessor and processing such inputs in accordance with an aggressive fuel management program including shut-off of fuel flow to the gas engine in response to vehicle braking at vehicle speeds above a predetermined maximum hysteresis speed and maintaining the fuel shut off during vehicle coasting above a predetermined speed while controlling the electric motor to provide regenerative braking or vehicle start during such fuel shut off modes of operation.

대표청구항 ▼

1. A fuel management control method for a hybrid electric vehicle drive having a transmission with gear settings, an internal combustion engine and an electric motor arranged in parallel such that both can propel the vehicle; the system including an electric motor driven fuel pump and a programmable

1. A fuel management control method for a hybrid electric vehicle drive having a transmission with gear settings, an internal combustion engine and an electric motor arranged in parallel such that both can propel the vehicle; the system including an electric motor driven fuel pump and a programmable microprocessor the method comprising the steps of monitoring vehicle speed;sensing braking pressure; shutting-off fuel flow to the gas engine in response to vehicle braking at predetermined vehicle speeds and gear settings and maintaining the fuel shut off during vehicle coasting while controlling the electric motor to provide either engine starting or regenerative braking depending upon the vehicle speed; and a torque converter having a mechanical one-way clutch connected between the pump and turbine of the torque converter that free wheels in the input drive direction so that the engine can be started by the electric motor and wherein the one-way clutch locks to directly connect the torque converter turbine and impeller during any back drive produced during vehicle coasting to prevent engine stall.