System and method for controlling stopping and starting of a vehicle engine
First Claim
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1. A method for determining when to stop an engine in a vehicle having a second power source, the method comprising:
- comparing at least one engine condition to a corresponding predetermined engine condition, thereby generating a first flag;
comparing at least two vehicle system controller conditions to corresponding predetermined vehicle system controller conditions, thereby generating a second flag, the at least two vehicle system controller conditions including at least two vehicle conditions chosen from a set of vehicle conditions, the set of vehicle conditions including a current vehicle speed, a maximum vehicle speed since engine start, and an engine runtime,the step of comparing at least two vehicle system controller conditions to corresponding predetermined vehicle system controller conditions including;
comparing the maximum vehicle speed since engine staff to a predetermined minimum vehicle speed, and comparing the engine runtime to a predetermined runtime, the generated second flag indicating an engine standby enable condition only when at least one of the maximum vehicle speed since engine staff is greater than the predetermined minimum vehicle speed, or the engine runtime is greater than the predetermined runtime;
comparing at least one second power source condition to a corresponding predetermined second power source condition, thereby generating a third flag; and
stopping the engine when at least one of the flags indicates an engine stop condition.
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Abstract
A method is provided for determining when to allow a vehicle engine to be placed in an engine standby mode. Various conditions, such as driver-controlled conditions, vehicle conditions, and energy management conditions, are compared to corresponding predetermined conditions. If at least some of the conditions match their corresponding predetermined conditions, the vehicle engine is allowed to be placed in a standby mode.
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Citations
20 Claims
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1. A method for determining when to stop an engine in a vehicle having a second power source, the method comprising:
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comparing at least one engine condition to a corresponding predetermined engine condition, thereby generating a first flag; comparing at least two vehicle system controller conditions to corresponding predetermined vehicle system controller conditions, thereby generating a second flag, the at least two vehicle system controller conditions including at least two vehicle conditions chosen from a set of vehicle conditions, the set of vehicle conditions including a current vehicle speed, a maximum vehicle speed since engine start, and an engine runtime, the step of comparing at least two vehicle system controller conditions to corresponding predetermined vehicle system controller conditions including;
comparing the maximum vehicle speed since engine staff to a predetermined minimum vehicle speed, and comparing the engine runtime to a predetermined runtime, the generated second flag indicating an engine standby enable condition only when at least one of the maximum vehicle speed since engine staff is greater than the predetermined minimum vehicle speed, or the engine runtime is greater than the predetermined runtime;comparing at least one second power source condition to a corresponding predetermined second power source condition, thereby generating a third flag; and stopping the engine when at least one of the flags indicates an engine stop condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for enabling engine standby in a vehicle having an engine, a motor, and a battery, the method comprising:
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determining whether at least one engine condition matches a corresponding predetermined engine condition; determining whether at least two vehicle system controller conditions match corresponding predetermined vehicle system controller conditions, the at least two vehicle system controller conditions including at least two vehicle conditions chosen from a set of vehicle conditions, the set of vehicle conditions including a current vehicle speed, a maximum vehicle speed since engine start, and an engine runtime, the step of determining whether at least two vehicle system controller conditions match corresponding predetermined vehicle system controller conditions including;
determining whether the maximum vehicle speed since engine start is greater than a predetermined minimum vehicle speed, and determining whether the engine runtime is greater than a predetermined runtime;determining whether at least one second power source condition matches a corresponding predetermined second power source condition; and enabling engine standby when at least one of the determined conditions matches a corresponding predetermined condition. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for enabling engine standby in a vehicle having an engine, a motor, and a battery, the method comprising:
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starting an engine standby enable routine; determining whether at least one engine condition matches a corresponding predetermined engine condition; determining whether at least two vehicle system controller conditions match corresponding predetermined vehicle system controller conditions, the at least two vehicle system controller conditions including at least two vehicle conditions chosen from a set of vehicle conditions, the set of vehicle conditions including a current vehicle speed, a maximum vehicle speed since engine start, and an engine runtime, the step of determining whether at least two vehicle system controller conditions match corresponding predetermined vehicle system controller conditions including;
determining whether the maximum vehicle speed since engine start is greater than a predetermined minimum vehicle speed, and determining whether the engine runtime is greater than a predetermined runtime; andenabling engine standby when at least one of the determined conditions matches a corresponding predetermined condition. - View Dependent Claims (20)
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Specification