Methods and systems for starting an engine
US-9656666-B2 · May 23, 2017 · US
System and method for fast engine starts with belt integrated starter generator assist during locking of disconnect clutch
US10272907B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10272907-B2 |
| Application number | US-201715412090-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 23, 2017 |
| Priority date | Jan 23, 2017 |
| Publication date | Apr 30, 2019 |
| Grant date | Apr 30, 2019 |
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- Title
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Abstract
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A controller is configured to respond to an engine start command, operate the engine to produce excess torque beyond a demand torque, and in response to engine speed achieving a threshold, operate the starter-generator to load the engine to consume the excess torque and drive the engine speed toward an electric machine speed, and engage a clutch to couple the engine and an electric machine.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of controlling a vehicle engine and starter-generator comprising: in response to receiving a start command, increasing an engine torque above a demand torque to generate excess torque; in response to engine speed achieving a threshold, applying a load to the engine by decreasing a starter-generator torque to consume the excess torque; and engaging a disconnect clutch to connect the engine with a driveline of the vehicle immediately after applying the load. 2. The method of claim 1 , wherein the engaging occurs after the engine and electric machine speeds are same. 3. The method of claim 1 , wherein the excess engine torque and the demand torque, adjusted for an energy-management torque, are same after the disconnect clutch is locked. 4. The method of claim 1 , wherein the increasing causes a turbocharger coupled to the engine to achieve a desired speed within a target duration before the engaging. 5. The method of claim 1 , wherein the threshold is defined by a target engine exhaust air flow rate. 6. The method of claim 1 , wherein the demand torque is based on a position of an accelerator pedal. 7. The method of claim 1 , wherein after applying the load to the engine, the engine output torque is less than a torque capacity of the disconnect clutch. 8. The method of claim 1 , wherein the starter-generator reduces the excess torque by an amount equal to a difference between the excess torque and the demand torque.
Assignees
Inventors
Classifications
Torque · CPC title
Parallel type · CPC title
Motor-assist type · CPC title
Clutch engagement state · CPC title
Turbocharger state · CPC title
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Frequently asked questions
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- What does patent US10272907B2 cover?
- A controller is configured to respond to an engine start command, operate the engine to produce excess torque beyond a demand torque, and in response to engine speed achieving a threshold, operate the starter-generator to load the engine to consume the excess torque and drive the engine speed toward an electric machine speed, and engage a clutch to couple the engine and an electric machine.
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification B60W20/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 30 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).