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US 8,602,142 B2Granted
Hybrid vehicle braking adjustment for vehicle weight
AssigneeCummins Inc.
InventorsMartin Books, Praveen Muralidhar
Life of this patent
Estimating the term…
Abstract
A method, apparatus, and system are disclosed for hybrid power system braking. In one embodiment, a vehicle weight input is received by a brake controller. In response to receiving the vehicle weight input, a maximum negative braking torque is determined. Regulation of negative braking torque according to vehicle weight is accomplished by one or both of a regenerative braking device and mechanical braking device.
Claims21
A method, comprising:
- receiving a vehicle weight input from a vehicle operator selector;
- in response to receiving the vehicle weight input, determining a maximum negative braking torque trajectory;
- and limiting negative braking torque of the vehicle without friction braking to the maximum negative braking torque trajectory in response to a deceleration request.
A method, comprising:
- operating a vehicle having a drive system, the vehicle performing intermittent deceleration;
- receiving a vehicle weight input from a vehicle operator selector;
- receiving a deceleration input;
- in response at least in part to the vehicle weight input, determining a maximum negative braking torque;
- and in response to the deceleration input, limiting negative braking torque without friction braking to the maximum negative braking torque while decelerating the vehicle and converting a portion of kinetic energy of the drive system into stored energy.
2 more elements
An apparatus, comprising:
- a controller structured to receive a vehicle weight input;
- means for determining a maximum negative braking torque in response to the vehicle weight input;
- and means for limiting negative braking torque without friction braking to the maximum negative braking torque upon receipt of a deceleration request signal.
A system, comprising:
- a powertrain including an internal combustion engine and an electrical device;
- a controller in communication the engine and the electrical device structured to receive a vehicle weight signal, the controller further comprising:
- a negative torque module structured to receive a deceleration request signal;
- a target negative braking torque trajectory module structured to determine a maximum negative braking torque trajectory without friction braking in response to the vehicle weight signal;
- and a regeneration module structured to provide a regenerative braking torque and a mechanical braking torque that are limited by the maximum negative braking torque trajectory;
- and a braking control module structure to provide a regenerative braking command and a mechanical braking command based on the regenerative braking torque and the mechanical braking torque;
- wherein the electrical device is responsive to the regenerative braking command to dissipate electrical energy during deceleration.
4 more elements
Dependencies are inferred from the claim text.