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US 11,698,039 B2Granted
Engine system
AssigneeJ. C. Bamford Excavators Limited
InventorAlan Tolley
Life of this patent
Estimating the term…
Abstract
An engine system for an off-highway vehicle includes a diesel engine configured to drive a driveline of the vehicle; an after-treatment arrangement configured to reduce emissions from the engine system; an after-treatment heating element configured to raise an operating temperature of the after-treatment arrangement; an electric energy storage device; and a controller configured to direct energy from the electric energy storage device to the after-treatment heating element in order to raise the operating temperature of the after-treatment arrangement.
Claims18
An off-highway vehicle comprising:
- an engine system, the engine system comprising:
- a. a diesel engine configured to drive a driveline of the vehicle;
- b. an after-treatment arrangement configured to reduce emissions from the engine system;
- c. an after-treatment heating element configured to raise an operating temperature of the after-treatment arrangement;
- d. an electric energy storage device;
- e. a controller configured to direct energy from the electric energy storage device to the after-treatment heating element in order to raise the operating temperature of the after-treatment arrangement;
- and
- f. a motor generator configured to drive the driveline of the vehicle, such that the engine system is configured to drive the driveline of the vehicle via the motor generator in an electric mode, via the diesel engine in an engine mode, or in a combination of both modes;
- wherein the controller is configured to determine a load demand on the system, and wherein:
- if the demand is determined to be below a lower load threshold, then the controller directs the system to drive the driveline in the electric mode;
- if the demand is above the lower load threshold and below an upper load threshold, the controller directs the system to drive the driveline in the engine mode;
- and
- if the demand is above the upper load threshold, the controller directs the system to drive the driveline in a combination of both the electric mode and the engine mode,
- wherein the system is configured to determine the operating temperature of the after-treatment system and, when the system is operating in the engine mode, when the operating temperature is determined to be decreasing and/or when the determined operating temperature has reached a pre-determined minimum temperature, the controller is configured to direct the engine to also provide mechanical energy to the motor generator, for conversion to electrical energy and storage in the electric energy storage device.
11 more elements
An off-highway vehicle comprising:
- an engine system, the engine system comprising:
- a. a diesel engine configured to drive a driveline of the vehicle;
- b. an after-treatment arrangement configured to reduce emissions from the engine system;
- c. an after-treatment heating element configured to raise an operating temperature of the after-treatment arrangement;
- d. an electric energy storage device;
- e. a controller configured to direct energy from the electric energy storage device to the after-treatment heating element in order to raise the operating temperature of the after-treatment arrangement;
- and
- f. a motor generator configured to drive the driveline of the vehicle, such that the engine system is configured to drive the driveline of the vehicle via the motor generator in an electric mode, via the diesel engine in an engine mode, or in a combination of both modes;
- wherein the controller is configured to determine a load demand on the system, and wherein:
- if the demand is determined to be below a lower load threshold, then the controller directs the system to drive the driveline in the electric mode;
- if the demand is above the lower load threshold and below an upper load threshold, the controller directs the system to drive the driveline in the engine mode;
- and
- if the demand is above the upper load threshold, the controller directs the system to drive the driveline in a combination of both the electric mode and the engine mode,
- wherein the system is configured to determine the operating temperature of the after-treatment system and, when the system is operating in the engine mode, when the operating temperature is determined to be decreasing and/or when the determined operating temperature has reached a pre-determined minimum temperature, the controller is configured to direct the engine to also provide mechanical energy to the motor generator, for conversion to electrical energy and storage in the electric energy storage device;
- and
- wherein the after-treatment heating element is configured to raise the operating temperature of the after-treatment arrangement by heating an exhaust from the diesel engine and/or by heating an SCR catalyst.
13 more elements
Dependencies are inferred from the claim text.