ENGINE START/STOP FUNCTION MANAGEMENT AND CONTROL ARCHITECTURE
First Claim
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1. A method comprising:
- providing a vehicle system including an engine, a plurality of engine accessories configured to be selectably driven by torque output of the engine, an aftertreatment system configured to receive exhaust from the engine during operation, a motor/generator system operatively coupled with the engine system, an energy storage system operatively coupled with the motor/generator system, an engine controller operatively coupled with the engine, the aftertreatment system, the motor/generator system and the energy storage system, and a plurality of operator controls in operative communication with the engine controller;
while the engine is running, operating the control system to conditionally stop the engine based upon a plurality of stop request criteria and a plurality of stop capability criteria; and
after the engine has stopped, operating the control system to conditionally start the engine based upon a plurality of start request criteria and a plurality of start capability criteria;
wherein the stop request criteria account for a condition of the operator controls, a velocity condition of the vehicle system, an operating condition of the vehicle accessories, an operating condition of the engine, and a request provided by a second controller external to the engine controller.
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Abstract
Unique apparatuses, systems, methods, and techniques for control of engine systems are disclosed. One embodiment is a unique controls process providing engine start/stop functionality. In one form, the controls process includes engine stop controls which evaluate a plurality of engine stop request conditions and a plurality of engine stop capability conditions, as well as engine start controls which evaluate a plurality of engine start request conditions and a plurality of engine start capability conditions.
10 Citations
20 Claims
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1. A method comprising:
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providing a vehicle system including an engine, a plurality of engine accessories configured to be selectably driven by torque output of the engine, an aftertreatment system configured to receive exhaust from the engine during operation, a motor/generator system operatively coupled with the engine system, an energy storage system operatively coupled with the motor/generator system, an engine controller operatively coupled with the engine, the aftertreatment system, the motor/generator system and the energy storage system, and a plurality of operator controls in operative communication with the engine controller; while the engine is running, operating the control system to conditionally stop the engine based upon a plurality of stop request criteria and a plurality of stop capability criteria; and after the engine has stopped, operating the control system to conditionally start the engine based upon a plurality of start request criteria and a plurality of start capability criteria; wherein the stop request criteria account for a condition of the operator controls, a velocity condition of the vehicle system, an operating condition of the vehicle accessories, an operating condition of the engine, and a request provided by a second controller external to the engine controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle system comprising:
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an engine operatively coupled with a drivetrain; an aftertreatment system configured to treat exhaust output by the engine; a motor/generator operatively coupled with the drivetrain; an energy storage system operatively coupled with the motor/generator; and an engine controller in operative communication with the engine, the aftertreatment system, the motor/generator, and the energy storage system; wherein the engine controller is configured to conditionally command the engine to stop based upon a stop request conditional and a stop capability conditional; wherein the stop request conditional is satisfied if either (a) the engine controller receives a stop request from a second controller, or (b) the engine controller determines that a plurality of conditions are satisfied, the plurality of conditions including an accelerator condition, a brake condition, a vehicle speed condition, and an engine accessories condition. - View Dependent Claims (10, 11, 12, 13, 14, 19, 20)
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15. A control module comprising:
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at least one processor; a communication network interface in operative communication with the processor; and at least one non-transitory computer readable medium configured to store instructions executable by the processor to evaluate a stop request conditional, a stop capability conditional, a start request conditional and a start capability conditional; wherein the stop request conditional evaluates an operator controls variable, a vehicle condition variable, an engine condition variable, and an external stop request received by the communication network interface, and wherein receipt of the external stop request by the communication network interface satisfies the stop request conditional independent of the operator controls variable, the vehicle condition variable, and the engine condition variable. - View Dependent Claims (16, 17, 18)
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Specification